AVCO LYCOMING

ART CATALOG

TIGO-541 SERIES
AIRCRAFT ENGINES

AVCO LYCOMING WILLIAMSPORT DIVISION

AVCO CORPORATION
WILLIAMSPORT, PENNSYLVANIA 17701

PC-121 Nov. 1275

 SUPPLEMENTAL PARTS LIST SSP1177

To Provide Parts Coverage for Avco Lycoming

TIGO-541-D1B Model Aircraft Engines
This supplement offers a complete parts list for the TIGO-541-D1B model
engines. Parts are arranged herein in group assemblies similar to those
in Parts Catalog PC-121. This allows use of the illustrations in PC-121
with this supplement. Each group assembly listed is headed by a page and
illustration figure number corresponding to those in PC-121, followed by
the parts list.
Use the Table of Contents in the original parts catalog PC-121 to find
the page number and illustration of the desired parts (Example: Cylinder
Assembly, Page 2-2). The corresponding page in this supplement (Cylinder
Assembly, Page 2-2) lists the parts for the TIGO-541-D1B models.

SSP1177 December, 1977

1
 TIGO-541-D1B

SECTION 1

Page 1-1 - Figure 1

Ref. Qty.
No. Part No. Description Per Assy.
1 LW-14052 CRANKCASE ASSEMBLY 1
2 STD-1984 DOWEL, 11/16 in. OD x 11/16 in.
long (solid) 1
3 STD-1943 DOWEL, 11/16 in. OD x 9/16 ID
x 11/16 in. long 2
4 LW-10734 DOWEL, Crankshaft bearing 3
LW-10647 DOWEL, Crankshaft bearing 8
5 38-14 STUD, 3/8-16 x 1-3/4 in. long 24
6 50-16 STUD, 1/2-13 x 2.00 in. long 12
7 38-17 STUD, 3/8-16 x 2-1/8 in. long 6
8 38-23 STUD, 3/8-16 x 2-7/8 in. long 6
9 67528 STUD, 5/16-18 x 1-5/8 in. long 4
10 61261 STUD, 5/16-18 x 1-1/2 in. long 4
11 31CD-20 STUD, 5/16-18 x 2-1/2 in. long,
drilled 4
12 25CD-18 STUD, 1/4-20 x 2-1/4 in. long,
drilled 6
13 25C-10 STUD, 1/4-20 x 1-1/4 in. long 6
14 69943 STUD, 1/4-20 x 1-13/32 in. long 8
15 68510 STUD, 1/4-20 x 1-1/16 in. long 1
16 25C-9 STUD, 1/4-20 x 1-1/8 in. long 2
17 68437 STUD, 5/16-18 x 1-7/8 in. long 4
18 25C-18 STUD, 1/4-20 x 2-1/4 in. long 1
19 50-52 STUD, 1/2-13 x 6-1/2 in. long 1
20 38-25 STUD, 3/8-16 x 3-1/8 in, long 1
21 STD-2035 DOWEL, 5/16 in. dia. x 1/2 in. long 1
22 LW-11256 BUSHING, Starter housing 1
23 STD-1353 INSERT, Heli-coil, no. 10-24 x 3/8 in.
long 2
24 STD-1774 PIN, 1/8 in. dia. x 1/4 in. long 2
25 25C-12 STUD, 1/4-20 x 1-1/2 in. long 4
26 STD-784 PLUG, Allen hd. 3/8 in. NPT 7
27 STD-405 PLUG, Square hd., 1/8 in. NPT 1
28 STD-355 PLUG, Allen hd., 3/4 in. NPT 2
29 1102 PLUG, Allen hd., 1/8 in. NPT 7
30 STD-1339 PLUG Allen hd., 1/16 in. NPT 9
31 STD-1003 DOWEL, 1/4 OD x 3/16 ID x 1/2 in.
long 2
32 38-18 STUD, 3/8-16 x 2-1/4 in. long 1
33 38-28 STUD, 3/8-16 x 3-1/2 in. long 1
34 AN913-0S PLUG, Sq. hd., drilled, 1/16 NPT 1

2
 TIGO-541-D1B

SECTION 1 (CONT.)

Page 1-1 - Figure 1 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.
35 AN932-6 PLUG, Allen hd. 3/4 NPT 1
36 STD-1173 INSERT, 1/4-20 x 1/2 long Heli-coil 1
38-13 STUD, 3/8-16 x 3-1/4 in. long 1
38 LW-13615 NOZZLE, Reduction gear, lubricating 1
39 73772 NOZZLE ASSEMBLY, Piston cooling 6
40 31C-17 STUD, 5/16-18 x 2-1/8 in. long
(Gov. pad) (Driven ht. of studs
1.44 in.) 4
Page 1-3 - Figure 2
1 1028-B BALL, 11/16 dia. 1
2 LW-11138 SPRING, Oil pressure relief valve 1
3 STD-1045 GASKET, 1-1/4 ID x 1-1/2 OD x 3/32 in.
annular 1
4 77808 VALVE ASSY. Oil press. relief,
adjustable 1
5 STD-294 GASKET, 7/8 OD x 5/8 ID x 3/32 annular 1
6 LW-14921 ADAPTER, Oil level gage 1
LW-14923 TUBE ASSY., Oil level gage 1
7 71621 CLIP, 3/8 in. ID for 174 in. screw 1
8 LW-10081 GAGE ASSY., Oil level (Left engine) 1
10 STD-1733 RING, Oil seal, 1/4 ID x 1/16 dia. 1
11 LW-14922 BRACKET, Oil level gage 1
BRACKET ATTACHING PARTS
12 STD-8 WASHER, 1/4 plain 2
13 STD-160 WASHER 1/4 internal lock 2
14 STD-705 BOLT, 1/4-20 x 11/16 in. long, hex hd. 1
15 STD-1499 BOLT, 1/4-20 x 1/2 in. long, hex hd. 1
16 STD-1411 NUT, 1/4-20 plain 1
17 70457 GASKET, Oil filler extension 1
18 LW-14605 CAP AND EXTENSION ASSY., Oil filler 1
19 LW-14592 EXTENSION ASSY. Oil filler 1
20 LW-10526 CAP ASSY., Oil filler 1
21 LW-14603 CHAIN ASSY., Oil filler cap 1

Page 1-5 - Figure 3

1 77663 BRACKET, Engine mounting, lower left 1

2 77664 BRACKET, Engine mounting, lower right 1
3 77678 BRACKET, Engine mounting, upper right 1
4 77677 BRACKET, Engine mounting, upper left 1

3
 TIGO-541-D1B
SECTION 1 (CONT.)

Page 1-5 - Figure 3 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.
ATTACHING PARTS

6 STD-33 WASHER, Plain, 3/8 in. 16

7 STD-678 WASHER, Internal lock, 3/8 in. 16
8 STD-2053 BOLT, Hex hd., 3/8-16 x 2-5/8 in. long 2
9 STD-1994 BOLT, Hex hd., 3/8-16 x 2-7/8 in. long 5
STD-2111 BOLT, Self-sealing, 3/8-16 x 2-7/8 in.
long, hex hd. 1
10 STD-2055 BOLT, 3/8-16 x 4-7/16 in. long 5
STD-2107 BOLT, Self-sealing, 3/8-16 x 4-7/16 in.
long, hex hd. 1
11 STD-2037 BOLT, 3/8-16 x 4-11/16 in. long 1
STD-2128 BOLT, Self-sealing, 3/8-16 x 4-11/16 in.
long, hex hd. 1
12 75688 STRAP, Lifting 1
ATTACHING PARTS
13 STD-8 WASHER, Plain, 1/4 in. 3
14 STD-160 WASHER, Internal lock, 1/4 in. 1
15 STD-1575 BOLT, Hex hd., 1/4-20 x 2-15/16 in. long 1
16 STD-1411 NUT, Plain, 1/4 in. 1
17 72707 EYE, Lifting, right side 1
18 78447 EYE, Lifting, left side 1
19 78448 SPACER, Lifting eye 2

Page 1-7 - Figure 4

1 74888 STUD, 1/2-20 x 11-1/2 in. long 6

1 STD-2181 WASHER, 33/64 ID x 7/8 OD x 1/8 in,
thick 6
1 STD-2090 NUT, 1/2-20 plain 6
2 75714 STUD, 1/2-20 x 9-25/32 in. long 2
2 STD-2181 WASHER, 33/64 ID x 7/8 OD x 1/8 in.
thick 2
2 STD-2090 NUT, 1/2-20 plain 2
2 LW-14044 WASHER 1/2 in. seal at starter pad 2
3 75713 STUD, 1/2-20 x 8-13/32 in. long 1
3 STD-2181 WASHER, 33/64 ID x 7/8 OD x 1/8 in.
thick 1

4
 TIGO-541-D1B

SECTION 1 (CONT.)
Page 1-7 - Figure 4 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.
3 STD-2090 NUT 1/2-20 plain 1
4 75782 STUD, 1/2-20 x 5-17/32 in. long 2
4 STD-2181 WASHER, 33/64 ID x 7/8 OD x 1/8 in.
thick 2
4 STD-2090 NUT, 1/2-20 plain 2
5 75712 STUD, 1/2-20 x 6-21/32 in. long 1
5 STD-2181 WASHER, 33/64 ID x 7/8 OD x 1/8 in.
thick 1
5 STD-2090 NUT, 1/2-20 plain 1
6 75799 STUD, 1/2-20 x 8-5/32 in. long 1
6 STD-2181 WASHER, 33/64 ID x 7/8 OD x 1/8 in.
thick 1
6 STD-2090 NUT 1/2-20 plain 1
7 75170 BOLT, 1/2-20 x 9-7/8 in. long 2
7 STD-2181 WASHER, 33/64 ID x 7/8 OD x 1/8 in.
thick 2
7 STD-2090 NUT, 1/2-20 plain 2
7 STD-1940 WASHER 1/2 dia. (seal) 2
8 STD-1948 BOLT, 1/4-20 x 2-11/16 in. long, hex hd. 8
8 STD-8 WASHER, 1/4 plain 18
8 STD-160 WASHER, 1/4 lock 9
8 STD-1411 NUT, 1/4-20 plain 9
8A STD-1575 BOLT, 1/4-20 x 2-15/16 long 1
MS20002C8 WASHER Countersunk 2
9 STD-1948 BOLT, 1/4-20 x 2-11/16 in. long 1
9 STD-8 WASHER, 1/4 plain 1
9 STD-160 WASHER, 1/4 lock 1
9 STD-1411 NUT, 1/4-20 plain 1
10 STD-1414 BOLT, 1/4-20 x 1-1/2 in. long 5
10 STD-8 WASHER, 1/4 plain 5
10 STD-160 WASHER, 1/4 lock 5
10 STD-1411 NUT 1/4-20 plain 5
11 STD-2084 BOLT, 1/4-20 x 1-3/4 in. long 4
11 STD-8 WASHER, 1/4 plain 4
11 STD-160 WASHER, 1/4 lock 4
12 STD-1419 BOLT, 1/4-20 x 1-1/8 in. long 2
12 STD-8 WASHER, 1/4 plain 2
12 STD-160 WASHER, 1/4 lock 2
13 STD-1951 BOLT, 1/4-20 x 3-5/8 in. long 1
13 STD-8 WASHER, 1/4 plain 1
13 STD-160 WASHER, 1/4 lock 1
14 STD-1952 BOLT, 1/4-20 x 2-1/8 in. long 1
14 STD-8 WASHER, 1/4 plain 1
14 STD-160 WASHER, 1/4 lock 1
14 STD-1411 NUT, 1/4-20 plain 1

5
 TIGO-541-DlB

SECTION 1 (CONT.)
Page 1-7 - Figure 4 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.
15 STD-1830 BOLT, 1/4-20 x 3-1/16 in. long 1
15 STD-160 WASHER, 1/4 lock 1
15 STD-1411 NUT 1/4-20 plain 1
16 STD-2015 BOLT, 5/16-18 x 3-1/8 in. long 1
16 STD-35 WASHER, 5/16 plain 1
16 STD-475 WASHER, 5/16 lock 1
17 STD-1979 BOLT, 3/8-24 x 2-13/16 in. long 1
17 STD-33 WASHER, 3/8 plain
17 STD-678 WASHER, 3/8 lock 1
17 383-B NUT, 3/8 plain 1
18 STD-1420 NUT, 5/16-18 slotted 4
18 STD-35 WASHER, 5/16 plain 4
19 72075 SEAL, Oil, 15/32 ID x 3/32 dia. section 1
20 STD-1864 NUT, 1/4-20 slotted 6
20 STD-8 WASHER, 1/4 plain un
Page 1-9 - Figure 5
1 LW-15876 CRANKSHAFT AND COUNTERWEIGHT ASSY. 1
LW-15872 CRANKSHAFT ASSY. 1
2 74876 BUSHING, Crankshaft dynamic
counterweight 10
3 76968 BUSHING, Crankshaft dynamic
counterweight (2nd order) 2
4 74768 GEAR Crankshaft 1
5 69641 DOWEL Rear crankshaft gear 2
6 74770 LOCKPLATE, Crankshaft gear 1
7 STD-477 BOLT, 1/4-28 x 3/4 in. long, hex
hd. 2
8 75462 BUSHING Front crankshaft spline 1
9 75359 DOWEL, front crankshaft spline
bushing 3
10 75637 COUNTERWEIGHT ASSY., Dynamic (3rd
order) 5
11 71903 BUSHING, Dynamic counterweight 20
12 77002 COUNTERWEIGHT ASSY., Dynamic (2nd
order) 1
13 77001 BUSHING, Dynamic counterweight 4
14 75631 ROLLER, Dynamic counterweight, 3rd
order 10
15 77007 ROLLER, Dynamic counterweight, 2.01
order 2
16 71907 WASHER Dynamic counterweight 20
17 LW-14820 RING, Internal retaining 20
18 77004 WASHER, Dynamic counterweight, 2nd
order 4
6
 TIGO-541-D1B

SECTION 1 (CONT.)

Page 1-9 - Figure 5 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.
19 77005 RING, Internal retaining 4
20 LW-11576 BEARING, Crankshaft 8
21 75517 BEARING, Prop. drive gear 2
22 75519 BEARING Prop. shaft 2
23 LW-12440 CAMSHAFT ASSEMBLY 1
24 STD-1066 DOWEL Stepped, .310 and .251 dia.
x 13/32 in. long 1
25 74769 GEAR, Camshaft 1
26 72078 LOCKPLATE, 5/16 in. bolt x 1-21/64
in. spacing 2
27 STD-679 BOLT, 5/16-24 x 27/64 in. long,
hex hd. 4
Page 1-11 - Figure 6
1 75557 GEAR, Propeller governor driven 1
2 LW-13081 PROPELLER SHAFT AND GEAR ASSEMBLY 1
3 75538 SHAFT, Propeller 1
4 LW-12122 SEAL, Propeller shaft, oil (solid) 1
5 75618 CAP, Thrust bearing 1
6 75619 SHIM, Thrust bearing cap 1
7 77454 SLINGER, Thrust bearing, oil 1
8 LW-13335 BEARING, Thrust 1
9 75562 GEAR, Propeller shaft driven 1
10 AN5008-20 CONE, Propeller hub 1
11 LW-14577 CONE, Propeller hub, front 1
12 76715 NUT, Propeller shaft, lock 1
13 STD-2076 KEY, Woodruff, 3/16 in. x 5/8 in.
dia. 1
14 75546 GEAR, Prop. shaft gov. drive 1
15 75822 SPRING, 1-1/16 in. OD x 1-57/64 in.
long 1
16 77015 GEAR ASSY., Generator and starter 1
17 75537 SHAFTGEAR, Generator and starter 1
18 77016 ADAPTER, Spring 1
19 LW-12519 GEAR ASSY., Prop. shaft drive 1
20 75553 GEAR, Prop. shaft drive 1
21 LW-12518 RACE, Thrust bearing, rear 1
22 LW-11739 TUBE, Prop. oil supply 1
23 LW-10123 TUBE, Prop. oil transfer 1
24 MS29513-133 "0" RING, 1-51/64 ID x 0.103 in.
dia. section 1
25 MS16625-200 RING, Internal retaining 1
26 LW-11738 SEAL, Oil, .070 dia. section x .431
ID 1

7
 TIGO-541-D1B

SECTION 1 (CONT.)

Page 1-12 - Figure 7

Ref. Qty.
No. Part No. Description Per Assy.
1 LW-11953 DRIVE ASSEMBLY, Starter 1
2 LW-11784 ADAPTER ASSEMBLY, Starter drive 1
3 LW-11780 BUSHING, 1.00 in. ID x 1-3/16
in. OD flanged 2
4 STD-859 DOWEL, 1/8 in. dia. x 1/4 in.
long 2
5 LW-11952 WASHER, Thrust 1
6 LW-10727 SEAL, 2-1/8 OD x 1-5/16 ID x 5/16 in.
wide 1
7 LW-11781 SPACER, Starter drive gear 1
8 LW-12241 SHAFTGEAR, Starter drive 1
9 75395 GEAR, Starter drive 1
10 75843 NUT, 5/8-18, crimp lock 1
11 MS9068-009 RING, Oil seal, 7/32 ID x 1/16 in. dia.
section 1
12 MS28775-147 RING, Oil seal, 2-39/64 ID x 1-1/32 dia.
section 1
ADAPTER ATTACHING PARTS
13 STD-35 WASHER, Plain, 5/16 dia. 4
14 STD-475 WASHER, Internal lock, 5/16 in. 4
15 STD-1410 NUT, Plain, 5/16 in. 4
Page 1-13 - Figure 8

1 75747 GEAR, Accessory idler 1

2 74722 GEAR, Accessory drive (intermediate)
bevel 1
3 76996 SHAFTGEAR, Hydraulic and vacuum pump
drive
4 75508 GEAR, Accessory drive, bevel 1
5 76925 SHAFT, Fuel pump idler gear 1
1
6 76967 LOCKPLATE, 1/4 in. bolt x 1-3/4 in.
spacing 1
7 STD-705 BOLT, Hex hd., 1/2-20 x 11/16 in. long 2
8 74755 GEAR ASSY., Fuel pump idler 1
9 77309 BUSHING, Crankshaft idler gear 1
10 70474 WASHER, Fuel pump idler gear thrust 1
11 STD-1737 RING, External retaining, 37/64 in. dia.
x .035 in. thick 1
12 77217 GEAR ASSEMBLY, Fuel pump drive 1
13 77224 PLUG, 41/64 dia. x 1/8 in. thick 1
14 74926 WASHER, Thrust, 3/4 ID x 1-1/8 OD x
1/16 in. thick 1

8
 TIGO-541-D1B

SECTION 1 (CONT.)

Page 1-13 - Figure 8 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.
15 STD-1800 RING, External retaining, 11/16 dia.
x 3/64 in. thick 1

Page 1-14 - Figure 9

1 LW-13519 SHIM, Torquemeter oil pump body 1

2 72075 SEAL, Oil, 3/32 section x 15/32 ID 2
3 MS28775-148 SEAL, Oil, "O" ring 1
4 STD-8 WASHER, 1/4 plain 4
5 STD-160 WASHER, 1/4 lock 4
6 STD-1411 NUT, 1/4-20 plain 4
7 LW-13440 THRUST BEARING, Prop. shaft drive gear 1
8 LW-13441 SEAT, Thrust bearing 1
9 LW-13439 COVER ASSY., Torquemeter oil pump 1
10 STD-557 DOWEL, 1/2 dia. x 1-11/16 long 1
Page 1-15 - Figure 10

1 76546 GASKET, Propeller control access 1

2 LW-14604 BREATHER, Separator 1
LW-11873 TUBE, Breather drain 1
78844 HOSE, 3/4 ID x 2-1/2 long 2
STD-2117 CLAMP, .56 to 1.06 range x 1/2 wide 4
ATTACHING PARTS
3 STD-8 WASHER, Plain, 1/4 in. 4
4 STD-160 WASHER Internal lock 1/4 in. 4
5 STD-1204 BOLT, 1/4-20 x 15/16 long, hex hd. 4
6 72741 GASKET, Timing pin hole cover 1
7 72540 COVER, Timing pin hole 1
ATTACHING PARTS
8 STD-28 WASHER, Plain, no. 10 2
9 STD-251 WASHER, Internal lock, no. 10 2
10 STD-82 SCREW, Fill. hd., No. 10-24 x 1/2 in.
long 2
11 LW-13052 PLATE, Prop. shaft oil seal retainer 2
12 511 SPACER, Thrust bearing cap nut 12

9
 TIGO-541-D1B

SECTION 1 (CONT.)
Page 1-15 - Figure 10 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.
ATTACHING PARTS

13 STD-33 WASHER, Plain, 3/8 in. 6

14 STD-2045 NUT, Self-locking, 3/8-24 6
15 72053 GASKET, Governor 1
16 72378 COVER, Governor drive 1
ATTACHING PARTS

17 STD-35 WASHER, Plain, 5/16 in. 20

18 STD-475 WASHER, Internal lock, 5/16 in. 4
19 STD-1410 NUT, Plain, 5/16-18 4
20 8313 GASKET, Vacuum pump 2
21 60430 COVER, Vacuum and hydraulic pump 2
ATTACHING PARTS
22 STD-8 WASHER, Plain, 1/4 in. 8
23 STD-160 WASHER Internal lock, 1/4 in. 8
24 STD-1411 NUT, Plain, 1/4-20 8
25 STD-208 SEAL Oil, 7/8 ID x 1-1/2 OD x 5/16 in.
wide 2
26 8313 GASKET, Tachometer drive 1
27 60430 COVER, Tachometer drive 1
ATTACHING PARTS
28 STD-8 WASHER, Plain, 1/4 in. 4
29 STD-160 WASHER, Internal lock, 1/4 in. 4
30 STD-1411 NUT, Plain, 1/4-20 4
Page 1-17 - Figure 11

1 78585 SHAFT Compressor drive 1

2 77707 GASKET, Crankcase rear 1
3 76240 ADAPTER ASSY., Compressor drive 1
4 76230 BUSHING, 1.00 ID x 1-1/8 in. OD
flanged 1
5 STD-394 DOWEL 3/32 dia. x 11/32 in. long 1
6 STD-1934 SEAL, Oil, 1.00 ID x 1-5/8 OD x 3/8 in.
wide 1

10
 TIGO-541-D1B

SECTION 1 (CONT.)
Page 1-17 - Figure 11 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.
ADAPTER ATTACHING PARTS
7 STD-35 WASHER, Plain 5/16 in. 6
8 STD-475 WASHER, Interniallock, 5/16 in. 6
9 LW-31-1.09 BOLT, Hex hd., 5/16-18 x 1-3/32 in. long 6
10 STD-2057 KEY, Woodruff, 5/32 x 5/8 in. (Special) 1
11 LW-10516 PULLEY, Compressor drive 1
12 AN960-1216 WASHER, 5/64 ID x 1-5/16 OD x 3/32 in.
thick 1
13 STD-1035 NUT, Slotted shear, 3/4-16 1
14 STD-761 PIN, Cotter, 3/32 dia. x 1.00 in. long 1
LW-10955 BELT, Compressor drive 1
STD-1342 SPACER, 7/8 OD x 3/8 ID x 1/8 thick 4
Page 1-18 - Figure 12

1 LW-12515 GASKET, Oil cooler bypass housing 1

2 LW-13247 HOUSING ASSY., Oil cooler bypass valve 1
3 LW-12896 SEAT, Thermostatic control valve 1
4 STD-1986 INSERT, Heli-coil, 1.00-14 NF-3 1
HOUSING ATTACHING PARTS
5 STD-8 WASHER, Plain, 1/4 in. 10
6 STD-160 WASHER, Internal lock, 1/4 in. 10
7 STD-1948 BOLT, 1/4-20 NC-3 x 2-11/16 in. long 1
8 STD-1688 BOLT, 1/4-20 NC-3 x 1.00 in. long 5
9 STD-2084 BOLT, 1/4-20 NC-3 x 1-3/4 in. long 4
10 LW-13230 VALVE ASSY., Temp. control, oil cooler
bypass 1
11 STD-294 GASKET, 7/8 in. OD x 5/8 in. ID x 3/32
in. annular 1
12 1540 PLUG, Thermometer well 1
Page 1-19 - Figure 13

1 LW-11678 SHAFT ASSY., Tachometer drive 1

3 78199 BUSHING, Tachometer drive 1
MS16624-1043 RING, Ext. retaining, 7/16 dia. x .025 1
4 74929 WASHER, Thrust, tachometer shaft 1
5 LW-10455 GASKET, Tachometer adapter 1
6 LW-11679 ADAPTER ASSY., Tachometer 1

11
 TIGO-541-D1B

SECTION 1 (CONT.)

Page 1-19 - Figure 13 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.
7 25C-11 STUD, 1/4-20 x 1-3/8 in. long 4
8 STD-547 SEAL, 9/16 ID x 1-1/8 OD x 5/16 in. wide 1
9 STD-696 WASHER, Plain, 1/4 in. 2
10 STD-160 WASHER, Internal lock, 1/4 in. 2
11 STD-1875 BOLT, Hex hd., 1/4-20 x 13/16 in. long 2
12 70455 GASKET, 25/32 ID x 1-1/8 OD x .030-.040
thick 1
13 LW-13896 PLUG, .150 3/6 hex hd. 1
SECTION 2

Page 2-1 - Figure 14

1 LW-10545 PISTON, 3 ring, (Compression ratio 7.3:1) 6

2 74241 RING, Piston, compression 12
3 73857 RING, Piston, oil regulating 6
4 LW-14077 PIN, Piston 6
5 72198 PLUG, Piston pin 12
6 LW-13422 CONNECTING ROD ASSY. 6
7 LW-13923 BUSHING, Conn. rod, upper 6
8 LW-12596 BOLT, Conn. rod 12
9 LW-12186 NUT, Conn. rod bolt 12
10 LW-13212 BEARING, Conn. rod 12
Page 2-2 - Figure 15

1 LW-13121 CYLINDER AND HEAD ASSY., Nitrided 6

2 STD-2090 NUT, 1/2-20 plain 26
3 383-B NUT, 3/8 plain 24
4 LW-12688 SEAT, Intake valve 6
5 71894 SEAT, Exhaust valve 6
6 76077 GUIDE, Valve, intake 6
7 79046 GUIDE Valve, exhaust (ni-resist) 6
8 69260 INSERT, Spark plug, 18-1.5 mm (long
reach) 12
9 25C-10 STUD, 1/4-20 x 1-1/4 in. long 24
10 25C-8 STUD, 1/4-20 x 1.00 in. long 12
11 66670 BUSHING, Rocker shaft 24
12 STD-1872 INSERT, Heli-coil, 1/8-27 NPT 6
13 72706 INSERT, Heli-coil, 1/4-20 x 3/8 in.
long 12
STD-1353 INSERT, Heli-coil, no. 10-24 x 3/8 in.
long 12
AN780-2 NIPPLE, Union 6
LW-13123 BAFFLE, Center fin 6

12
 TIGO-541 -D1B

SECTION 2 (CONT,)

Page 2-2 - Figure 15 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.
Per

STD-1925 SCREW 1/4-20 x 5/8 in. long 6

STD-8 WASHER, 1/4 plain 6
74887 SPACER, 7/8 in. OD x 0.52 in. ID x 3/8
in. thick 2
14 71481 RING, Oil seal 6
15 LW-13262 VALVE, Intake (hollow stem) 6
16 LW-11082 VALVE, Exhaust (rotator type) 6
17 LW-13321 SEAT, Valve spring lower, intake 6
18 76093 SEAT, Valve spring lower, exhaust 6
19 LW-11798 SPRING, Valve outer 12
20 LW-11799 SPRING, Valve, auxiliary 12
21 69532 SEAT, Valve spring, intake 6
22 72050 KEY, Valve, intake 12
62388 CAP, Valve stem, intake 6
23 LW-10076 SEAT, Valve spring (rotator type) 6
24 MS13997-3 KEY, Valve (rotator type) 12
25 MS13998-3 CAP Valve stem 6
26 LW-10937 LIFTER, Hydraulic 12
27 74906 GASKET, Shroud tube adapter 6
28 LW-13566 ADAPTER, Shroud tube 6
29 STD-8 WASHER, Plain, 1/4 in. 17
30 STD-160 WASHER Internal lock, 1/4 in. 18
31 STD-1875 BOLT, 1/4-20 x 13/16 in. long, hex hd. 18
32 LW-14015 SHROUD TUBE ASSY., Push rod 12
33 LW-13565 SPRING, Shroud tube 12
34 LW-13340 WASHER, 25/32 ID x 31/32 OD x 1/32 in.
thick 24
35 70310 SEAL, Shroud tube 24
36 76180 ROD ASSY., Push - Total of un
36 76181 ROD ASSY., Push - 12 req'd. un
36 76182 ROD ASSY., Push - Select of un
36 76183 ROD ASSY., Push - fit. un
37 76266 ROCKER ASSY., Valve 12
38 76242 BUSHING, Valve rocker 12
39 72626 SHAFT, Valve rocker 12
40 66732 GASKET, Valve rocker shaft cover 12
41 72710 COVER, Valve rocker shaft 12
42 72709 SCREW, 1/4-20 x 5/8 long, self-sealing 12
43 STD-160 WASHER Internal lock, 1/4 in. 12
44 STD-1411 NUT, Plain, 1/4-20 18
45 76036 GASKET, Rocker box cover 6
46 76038 COVER ASSY. Rocker box 6
47 STD-2059 SCREW, 1/4-20 x 5/8 long, pan. hd.,
self-locking 48

13
 TIGO-541-D1B

SECTION 2 (CONT.)

Page 2-2 - Figure 15 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.
74494 PLATE, Spark plug reach caution 6
48 71549 WASHER, Valve rocker 12
LW-11665 THRUST BUTTON, Rocker shaft 24
Page 2-4 - Figure 16

1 LW-12158 BAFFLE ASSEMBLY, Intercylinder 3

LW-14588 BAFFLE ASSEMBLY, Intercylinder
(Between 4 and 6) 1
2 71610 HOOK Intercylinder baffle retainer 4
3 71611 RETAINER, Intercylinder baffle 4
4 AN931-4S16 GROMMET, 1/4 ID x 1-1/4 OD split 1
6 STD-8 WASHER, Plain, 1/4 in. 1
7 STD-160 WASHER, Internal lock, 1/4 in. 1
8 STD-1968 BOLT, Hex hd., 1/4-20 x 5/8 in. long 1
Page 2-6 - Figure 17

1 LW-14114 CONNECTOR Exhaust valve oil line

(In cylinder heads) 6
2 72376 ELBOW, 1/4 in. tubing adjustable 90°
(rear cyls.) 2
3 75948 TEE, 1/4 tubing, adjustable with st. thd
on side (center and forward cyls.) 4
4 LW-12876-4-066 HOSE ASSY., (Between cylinders) 4
5 LW-12798-4-222 HOSE ASSY., (Cyl. no. 1 to oil header,
left side) 1
6 LW-12798-4-190 HOSE ASSY., (Cyl. no. 2 to oil header,
right side) 1
7 AN816-4 NIPPLE 2
8 LW-10375 ELBOW 1
9 76734 ZIP STRAP 1
SECTION 3
Page 3-1 - Figure 18

1 75585 GASKET, Oil sump 1

2 LW-11155 SUMP ASSY., Oil 1
3 STD-1173 INSERT, Heli-coil, 1/4-20 x 1/2 in.
long 2
4 77646 DOWEL, Oil pump inlet 1
5 STD-551 PLUG, Sq. hd., drilled 1/2-14 NPT 2
6 AN932-5 PLUG Allen hd., 1/2 NPT 1
7 71140 FITTING, Breather 1

14
 TIGO-541-D1B

SECTION 3 (CONT.)

Page 3-1 - Figure 18 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.

ATTACHING PARTS

8 STD-8 WASHER, Plain, 1/4 in. 36

9 STD-160 WASHER, Internal lock, 1/4 in. 36
10 STD-2039 BOLT, Hex hd., 1/4-20 x 4-1/2 in. long 8
11 STD-1688 BOLT, Hex hd., 1/4-20 x 1.00 in. long 22
12 STD-2001 BOLT, Hex hd., 1/4-20 x 3-1/2 in. long 2
13 STD-1887 BOLT, Hex hd., 1/4-20 x 4.00 in. long 4

14 STD-1272 GASKET, Oil suction screen 1

15 77644 SCREEN Oil suction 1
16 77645 PLUG, 1-1/2-18 thd. x 1.00 hex hd. 1
17 MS28775-121 RING, Oil seal, 1-3/64 ID x .103 dia.
section 1
18 LW-13024 PUMP, Oil assembly 1
19 77898 BODY ASSEMBLY, Oil pump 1
20 75145 DOWEL, Oil pump outlet
21 76964 SHAFT, Oil pump idler 1
22 AN380C4-6 PIN, Cotter, 1/8 dia. x 1-1/2 in.
long 1
23 76970 IMPELLER, Oil pump driven 1
24 76971 IMPELLER, Oil pump driving 1
25 LW-13026 COVER, Oil pump 1
26 LW-13022 VALVE ASSEMBLY, Relief 1
27 76824 SHAFT, Oil pump drive 1
28 STD-1941 PIN, 3/16 in. dia. x 7/8 in. long 1
29 STD-8 WASHER, Plain, 1/4 in. 10
30 STD-2003 BOLT, Hex hd., drilled end, 1/4-20 x
3-1/16 long 2
31 STD-2005 BOLT, Hex hd., drilled end, 1/4-20 x
2-7/32 long 2
32 STD-2004 BOLT, Hex hd., drilled end, 1/4-20 x
2-13/32 long 1
33 STD-1409 NUT, Slotted shear, 1/4-20 5
34 MS28775-120 RING, Oil seal, 1.00 ID x .103 dia.
section 1
35 LW-10738 BAFFLE, Camshaft gear
36 STD-35 WASHER, Plain, 5/16 in. 3
37 STD-1955 BOLT, 5/16-18 x 4-1/4 in. long 3
38 LW-25H.75 BOLT, Hex hd., drilled hd., 1/4-20 x 3/4
in. long 2
Page 3-3 - Figure 19

1 LW-12517 GASKET, Oil filter adapter 1

2 76549 ADAPTER ASSY., Oil filter housing 1
15
 TIGO-541-D1B

SECTION 3 (CONT.)
Page 3-3 - Figure 19 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.
3 STD-1989 INSERT, Heli-coil, 7/8-14 NF-3 x
1/2 long 1
4 STD-1849 INSERT, Heli-coii, 3/4-16 NF-3 x
3/4 long 1
77607 SLEEVE, Oil relief valve 1
5 STD-8 WASHER, Plain, 1/4 in. 4
6 STD-160 WASHER Internal lock, 1/4 in. 4
7 STD-1411 NUT, Plain, 1/4-20 in. 1
8 STD-1952 BOLT, Hex hd., 1/4-20 x 2-1/8 in. long 2
9 STD-1688 BOLT, Hex hd., 1/4-20 x 1.00 in. long 1
15 76539 SEAT, Oil relief valve 1
16 76542 SPRING, Oil relief valve 1
17 STD-589 GASKET, Copper asbestos 1
18 LW-14050 PLUG, Oil relief valve 1
20 LW-13905 FILTER ASSY., Oil, long 1
21 LW-13904 KIT, Converter plate oil filter 1
SECTION 4
Page 4-1 - Figure 20
1 LW-15584 HOUSING ASSY., Induction 1
2 75660 SPACER, Induction housing 6
3 STD-8 WASHER, Plain, 1/4 in. 3
4 STD-160 WASHER, Internal lock, 1/4 in. 3
5 STD-2028 BOLT, Hex hd., 1/4-20 x 5-21/32 in.
long 1
6 STD-2027 BOLT, Hex hd., 1/4-20 x 4-13/32 in.
long 2
7 72377 ELBOW, 3/8 in. tubing, adj. 900 1
8 74070 ELBOW, 3/8 in. tubing, ad. 45° 1
LW-14259 ELBOW, 1/4 in. tubing x 1 8 NPT
(restricted 450) 1
75948 TEE, 1/4 in. tube, adjustable 1
9 AN929-4 CAP ASSEMBLY, 1/4 in. tube 3
10 STD-1164 INSERT, Heli-coil, 5/16-18 x 5/8
long 4
11 MS122200 INSERT, Heli-coil, no. 10-24 x
31/64 long 4
12 STD-2134 INSERT, Heli-coil, 7/16-20 x 3/8
long 6
STD-514 DOWEL, 5/16 dia. x 1/2 in. long 2
13 76291 COVER, Pressurizing valve 1

16
 TIGO-541-D1B

SECTION 4 (CONT.)

Page 4-1 - Figure 20 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.
14 STD-28 WASHER, Plain, no. 10 4
15 STD-1896 SCREW, No. 10-24 x 7/8 long, fill
hd. dr. hd. 4
16 76399 VALVE ASSY., Pressurizing 1
17 76286 SEAT, Pressurizing valve 1
18 76292 VALVE AND DIAPHRAGM ASSEMBLY 1
19 76288 SPRING, Pressurizing 1
20 75955 PLUG, Induction housing, seal 1
21 75957 RING Oil seal, 11/16 in. ID x 0.07
dla. section 1
22 MS16625-1081 RING, Internal retaining, 13/16 dia.
x .042 thick 1
23 1102 PLUG, 1/8 pipe x 3/8 long 6
24 LW-14540 NOZZLE ASSEMBLY, Fuel injection 6
STD-2173 WASHER, Plain 6
25 LW-11602 LCCKPLATE, Fuel injector nozzle 6
LW-14915 ELBOW, 1/4 tube, 90° , restricted 1
LW-14914 NIPPLE, 1/8 NPT to 1/4 tube, restric-
ted 1
26 LW-13911 PIPE, Intake, cyl. no. 1 1
27 LW-13912 PIPE, Intake, cyl. no. 2 1
28 LW-13913 PIPE, Intake, cyl. no. 3 1
29 LW-13914 PIPE, Intake, cyl. no. 4 1
30 LW-13915 PIPE, Intake, cyl. no. 5 1
31 LW-13916 PIPE, Intake cyl. no. 6 1
32 72711 RING, Seal intake pipes 6
33 71973 GASKET, 2 bolt flange 1-7/8 ID 6
34 74360 FLANGE, Intake pipe, upper 6
35 STD-8 WASHER, Plain, 1/4 in. 12
36 STD-160 WASHER, Internal lock 1/4 in. 12
37 STD-1215 BOLT, 1/4-20 x 1-1/4 long, hex hd. 12
LW-14606 SPACER, Induction housing 1
38 77623 LUG Induction housing 2
39 77622 SUPPORT, Induction housing, lug 1
40 STD-2042 BOLT, 1/4-20 x 1-3/16 long hex hd. 2
41 STD-820 WASHER, 16/64 ID x 33/64 OD x 1/8
thick 2
42 STD-160 WASHER Internal lock, 1/4 in. 2
43 STD-1204 BOLT, 1/4-20 x 15/16 in. long, hex hd. 1
44 STD-160 WASHER, Internal lock, 1/4 in. 1
45 STD-8 WASHER, Plain, 1/4 in. 1
46 STD-160 WASHER, Internal lock, 1/4 in. 1
47 STD-1887 BOLT, 1/4-20 x 4.00 long, hex hd. 1
48 STD-1411 NUT, 1/4-20 plain 1
 TIGO-541-D1B

SECTION 4 (CONT.)

Page 4-3 - Figure 21

Ref. Qty.
No. Part No. Description Per Assy.

1 LW-14585 FUEL INJECTOR (RSA-10DB2) 1

2 STD-1727 WASHER, Plain, 21/64 ID x 3/4 OD x 1/8
thick 4
3 STD-475 WASHER, 5/16 internal lock 4
4 STD-1828 BOLT, 5/16-18 x 1-5/16 long, hex hd. 4
5 73032 GASKET, Air inlet housing 1
MS29512-6 SEAL, Oil, 15/32 ID x 5/54 dia. section 1
6 AN815-6 UNION, 3/8 tube 1
7 75940 TUBE ASSY., Fuel injector to induction
housing 1
LW-14621 ROD, Connecting, controller linkage 1
STD-63 NUT, No. 10-32 plain 2
LW-13429 ROD END, Injector controller linkage 2
LW-14607 SPACER, 1/4 OD x 3/16 long 2
STD-122 WASHER, 7/32 ID x 5/16 OD x .03 thick 2
AN3-10 BOLT, No. 10-32 x 1.03 long, dr. end 1
AN3-13 BOLT, No. 10-32 x 1-13/32 long, dr. end 1
STD-303 NUT, No. 10-32 slotted shear 2
STD-68 PIN, 1/16 x 1/2 long cotter 2
27 74944 GASKET, Turbocharger controller adapter 1
28 LW-14587 ADAPTER ASSY., Turbo controller 1
29 STD-783 PLUG, 1/4-18 NPT, Socket head 1
30 1102 PLUG, 1/8 NPT x 3/8 long, Allen hd. 3
31 STD-1727 WASHER, Plain, 21/64 ID x 3/4 OD x 1/8
thick 4
32 STD-475 WASHER, Internal lock, 5/16 in. 4
33 LW-31-1.09 BOLT, Hex hd., 5/16-18 x 1.00 long 4
34 LW-13037 TUBE ASSY., Induction housing to control-
ler housing 1
35 MS29512-6 SEAL, Oil, 15/32 ID x 5/64 in. dia.
section 1
36 LW-12745 CHECK VALVE, Vent line 1
75993 GASKET, Sonic nozzle 1
LW-14581 ADAPTER, Sonic nozzle and abs. pressure
relief valve 1
STD-8 WASHER, Plain, 1/4 in. 3
STD-160 WASHER Internal lock, 1/4 in. 3
STD-1688 BOLT, 1/4-20 x 1.00 long, hex hd. 3
MS29513-138 SEAL, "0" ring, 2-7/64 ID x 3/32 section 1
LW-14445-5 VALVE ASSY., Absolute pressure relief 1
STD-425 WASHER, Plain, no. 10 4
STD-251 WASHER, Internal lock, no. 10 4
STD-375 SCREW, Fill. hd., no. 10-24 x 5/8 long 4

18
 TIGO-541-D1B

SECTION 4 (CONT.)

Page 4-3 - Figure 21 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.
STD-784 PLUG, 3/8-18 NPT, Socket hd. 1
LW-14192 GASKET, Sonic nozzle 1
LW-14583 SONIC NOZZLE 1
STD-8 WASHER, Plain, 1/4 in. 3
STD-160 WASHER, Internal lock, 1/4 in. 3
STD-1875 BOLT, Hex hd., 1/4-20 x 51/64 in. long 3
37 73314 GASKET, Density controller 1
38 LW-14590 CONTROLLER ASSY., Absolute pressure,
adjustable 1
39 STD-28 WASHER, Plain, no. 10 4
40 STD-251 WASHER, Internal lock no. 10 4
41 STD-375 SCREW, No. 10-24 x 5/8 long, fill. hd.,
dr. hd. 4
42 72377 ELBOW, 3/8 tube, adjustable 90° 2
MS29512-6 SEAL, Oil, 15/32 ID x 5/64 in. dia.
section 2
AN822-6-6 ELBOW, 3/8 tube x 3/8 NPT, 90 1
LW-12799-6S-130C HOSE ASSY., Controller outlet 1
46 61548 PLATE, Name 1
STD-1901 DRIVE STUD, No. 4 x 3/16 in. long,
round head 4
47 60096 GASKET, Fuel pump 1
48 77537 ADAPTER ASSY., Controller drain 1
49 STD-784 PLUG, Socket hd., 3/8-18 NPT 1
50 STD-33 WASHER, Plain, 3/8 in. 2
51 STD-678 WASHER, Internal lock, 3/8 in. 2
52 STD-1957 BOLT, Hex hd., 3/8-16 x 1-1/4 long 2
Page 4-5 - Figure 22
1 75890 GASKET, Fuel drain check valve 1
2 LW-13342 HOUSING ASSY., Fuel drain check valve
3 AN822-3 ELBOW, 900 flared tube, pipe 1
1
4 AN823-3 ELBOW, 45 flared tube pipe 1
AN825-4 TEE, 1/8-27 NPT to 7/16-20 thd. 1
MS29513-015 RING, Oil seal 1/2 ID x 1/16 section 1
5 75087 SPRING, Fuel drain check valve 1
6 LW-13344 PLUNGER, Fuel drain check valve 1
7 STD-1006 SEAL, "0" ring, 7/16 ID x 3/32 dia.
section 1
STD-8 WASHER, Plain, 1/4 in. 2
STD-160 WASHER, Internal lock, 1/4 in. 2
STD-1411 NUT, 1/4-20 plain 2

19
 TIGO-541-D1B

SECTION 4 (CONT.)

Page 4-5 - Figure 22 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.
8 77941 MANIFOLD ASSY., Fuel drain, right 1
9 77942 MANIFOLD ASSY., Fuel drain, left 1
10 STD-148 NIPPLE, Union 2
11 STD-2166 ELBOW, Union 1
12 AN822-3 ELBOW, 90 flared tube, pipe thd. 1
13 STD-8 WASHER, Plain, 1/4 in. 2
13 STD-160 WASHER, Internal lock 1/4 in. 2
13 STD-1204 BOLT, 1/4-20 x 15/16 long, hex hd. 2
14 77921 TUBE ASSY., Manifold to check valve
(right) 1
15 62254 CLIP, 3/16 in. ID for 1/4 dia. screw 2
16 77919 TUBE ASSY., Manifold to check valve
(left) 1
17 62254 CLIP, 3/16 in. ID for 1/4 dia. screw 1
18 LW-12098-4-124 TUBE ASSY., Cyl. no. 1,2,4 3
19 LW-12098-1-116 TUBE ASSY., Cyl. no. 3 1
20 LW-12098-1-200 TUBE ASSY., Cyl. no. 5 1
21 LW-12098-1-183 TUBE ASSY. Cyl. no. 6 1
22 73650 CLIP, 1/4 ID for 1/4 dia. screw 6
23 MS21919-G12 CLIP, 3/4 dia. with no. 10 screw 6
24 STD-28 WASHER, Plain, no. 10 6
25 STD-969 SCREW, No. 10-32 x 1/2 long, fill. hd. 6
26 STD-670 NUT, No. 10-32 Self-locking 6

Page 4-7 - Figure 23

1 LW-10799 SPACER, Fuel in-lectorpump 1

2 LW-13919 PUMP ASSY., Fuel 1
3 STD-35 WASHER, Plain, 5/16 in. 4
4 STD-475 WASHER, Internal lock, 5/16 in. 4
5 STD-1410 NUT Plain, 5/16-18 4
6 STD-213 SEAl, Oil, 3/4 ID x 1-3/8 OD x 5/16 in.
wide 1
7 78067 ELBOW, 1/4 tube to 1/8 NPT, vent 1
8 78523 ELBOW, 3/8 flared 1
9 76422 ELBOW, 90° 1
10 LW-14924 TUBE ASSY., Fuel pump to injector 1
LW-14925 BRACKET, Angle inj. line clip 90° 1
73034 CLIP, Ignition cable 1
STD-160 WASHER Internal lock, 1/4 in. 1
STD-1499 BOLT, 1/4-20 x 1/2 long, hex hd. 1
STD-1411 NUT, 1/4-20 plain 1
11 LW-11838 TUBE ASSY., Fuel pump to induction hsg. 1
12 73650 CLAMP, 1/4 ID cushion type 1
13 74117 BRACKET, Injector line, 900 1
14 STD-28 WASHER, Plain, no. 10 1
20
 TIGO-541-D1B

SECTION 4 (CONT.)

Page 4-7 - Figure 23 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.
15 STD-860 SCREW, Fill. hd., no. 10-24 x 5/8 in.
long 1
16 STD-670 NUT, Self-locking, no. 10-24 1

SECTION 5

Page 5-1 - Figure 24

1 75473 SHAFTGEAR ASSY., Magneto drive 1

2 69565 SLEEVE, Magneto drive shaft 1
3 75467 COUPLING ASSY., Magneto, intermediate 1
4 69565 SLEEVE, Magneto drive shaft 1
5 LW-12136 CUSHION, Magneto drive 4
6 69208 COUPLING, Magneto drive 2
11 LW-12681 GASKET, Magneto 2
12 LW-349310-4 MAGNETO, Right, S6RN-1209 1
13 LW-349290-2 MAGNETO, Left, S6LN-1208 1
ATTACHING PARTS

14 75965 CLAMP Magneto 4

15 STD-475 WASHER Internal lock, 5/16 in. 4
16 STD-1410 NUT, Plain, 5/16-18 in. 4

Page 5-3 - Figure 25

1 LW-720580-2 CABLE ASSY., Ignition, shielded 1

STD-1874 SCREW 1/4-20 x 7/8 long, fill. hd.,
self-locking 4
STD-2029 BOLT, 1/4-20 x 7/8 long, hex hd. 4
STD-2079 NUT, Self-locking, 1/4-20 4
35 1182-Y5 SPARK PLUG, (Champion RHB-32W) 12

Page 5-5 - Figure 26

1 AN4047-1 GASKET, Accessory drive 1

2 LW-14464 COUPLING ASSY., Alternator drive 1
2A LW-14472 SPRING, Coupling assy. 1
3 LW-10261 ADAPTER, Alternator drive coupling 1
4 LW-10259 ADAPTER ASSY., Alternator 1
5 31-12 STUD, 5/16-18 x 1-1/2 in. long 4

ADAPTER ASSEMBLY ATTACHING PARTS

6 STD-33 WASHER, Plain, 3/8 in. 6

21
 TIGO-541-D1B

SECTION 5 (CONT.)
Page 5-5 - Figure 26 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.
ADAPTER ASSEMBLY ATTACHING PARTS (CONT.)

7 STD-678 WASHER Internal lock, 3/8 in. 6

8 STD-596 NUT, Plain, 3/8-24 in. 6
9 LW-10264 GASKET, Alternator adapter 1
10 LW-10256 ALTERNATOR, 24V-100 Amp. 1
ALTERNATOR ATTACHING PARTS

11 STD-35 WASHER, Plain, 5/16 in. 4

12 STD-475 WASHER Internal lock, 5/16 in. 4
13 STD-37 NUT Plain, 5/16-24 4
14 MS9047-077 ROLL PIN 1
17 75539 ADAPTER ASSY., Generator drive 1
18 STD-859 DOWEL, 1/8 dia. x 9/32 in. long 1
19 75536 BUSHING, Flanged, 1-1/8 ID x 1-1/2 OD 1
20 STD-1339 PLUG, Allen hd., 1/16-27 NPT 2
21 LW-10727 SEAL, Oil 2-1/8 OD x 1-5/16 in. wide 1
22 STD-2068 SCREW, Nylon lock, 1/4-20 x 1-1/8 in. lonng 2
23 STD-8 WASHER, Plain, 1/4 in. 2
24 LW-11778 WASHER, Thrust 1
25 75500 GEAR ASSY., Generator drive 1
26 MS9068-009 RING, Oil seal, 7/32 ID x /16 dia.
section 1
27 AN124001 RING, Oil seal, 3-7/8 ID x 1/8 dia.
section 1
Page 5-7 - Figure 27
1 77900 HOUSING ASSY., Starter drive 1
2 25C-12 STUD, 1/4-20 x 1-1/2 long 3
3 STD-997 DOWEL, Oil, 5/16 in. dia. x 13/16 long 1
4 77870 SHAFT, Starter idler gear 1
5 STD-1133 DOWEL, 1/8 dia. x 13/16 in. long 1
6 STD-514 DOWEL, 5/16 in. dia. x 1/2 long 2
STARTER DRIVE HOUSING ATTACHING PARTS
7 STD-8 WASHER, Plain, 1/4 in. 6
8 STD-160 WASHER Internal lock, 1/4 in. 6
9 STD-1411 NUT, plain,1/4-20 in. 6
10 75566 COUPLING ASSY., Starter slip 1

22
 TIGO-541-D1B

SECTION 5 (CONT.)

Page 5-7 - Figure 27 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.
STARTER DRIVE HOUSING ATTACHING PARTS (CONT.)

11 75510 SHAFT, Bendix drive 1

12 76528 GEAR ASSY., Starter slip coupling 1
13 76835 BUSHING, Slip coupling 1
14 STD-1025 KEY, 5/8 in. dia. x 1/8 in. 1
15 76842 COUPLING Starter slip 1
16 76836 WASHER, Thrust slip coupling 1
17 75521 COUPLING ASSY., Bendix 1
18 73051 PIN, 1/4 dia. x 25/32 in. long 1
19 75655 WASHER, Thrust, 9/16 in. ID x 1-1/8 in.
OD x 1/16 in. thick 1
20 LW-11329 GEAR ASSY., Starter idler 1
21 77987 BEARING, 1/2 ID x 11/16 OD x 3/4 long 1
22 78791 STARTER ASSY., Prestolite 24V. 1

STARTER ATTACHING PARTS

23 STD-8 WASHER, Plain, 1/4 in. 7
24 STD-160 WASHER, Internal lock, 1/4 in. 7
25 STD-1215 BOLT, Hex hd., 1/4-20 x 1-1/4 in. long 4
26 STD-1411 NUT, Plain, 1/4-20 3
27 78789 PLATE, Starter retaining 1
28 76815 STUD, Starter retaining plate 2
LW-11515 HOSE, 1/4 ID x 5/8 OD x 2-5/16 in. long 2
PLATE ATTACHING PARTS
29 STD-8 WASHER, Plain, 1/4 in. 2
30 STD-160 WASHER Internal lock, 1/4 in. 4
31 STD-1411 NUT, Plain, 1/4-20 in. 4
SECTION 6
Page 6-1 - Figure 28

1 LW-14622 TURBOCHARGER ASSY., T18A51 1

LW-14811 VALVE ASSY., Exhaust bypass valve 1
2 LW-12154 HOSE, 3-1/2 ID x 2-5/8 long x 3/16 - 1/4
wall 1
3 LW-10539 CLAMP, Hose, 4.00 dia. 2
4 75371 GASKET, Turbocharger oil inlet 1
5 76889 ADAPTER, Turbocharger oil inlet 1
6 MS20822-6 ELBOW, Turbo oil inlet, 3/8 in. tube x
1/4 NPT 900 1
23
 TIGO-541-D B

SECTION 6 (CONT.)

Page 6-1 - Figure 28 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.

7 LW-10122 GASKET, Turbo oil drain adapter 1

8 LW-11954 TUBE ASSY., Turbine oil drain, 1.00 dia. 1
9 STD-33 WASHER, Plain, 3/8 in. 4
10 STD-678 WASHER, Internal lock, 3/8 in. 4
11 STD-1946 BOLT, Hex hd., 3/8-16 x 7/8 in. long 4
12 AN840-17 NIPPLE, 1.00-11 1/2 NPT x 1.00 ID hose 1
13 LW-11373 HOSE, 1.00 ID x 1-3/8 OD x 2-1/2 in. long 1
15 AN737TW-46 CLAMP, Hose, 1.00 - 1-3/8 in. 2

Page 6-3 - Figure 29

1 LW-14634 BRACKET, Turbocharger and compressor 1

LW-14660 STUD, 1/8-16 x 1-7/8 long 1

LW-14634 TO TURBO ATTACHING PARTS

2 AN6C-25A BOLT, Hex hd., 3/8-24 x 2-49/64 in. long 1

3 MS20500-624 NUT, Self-locking, 3/8-24 2
4 LW-10090 SHIM, Turbo mounting (3 max.) un
5 LW-13651 BRACKET, Turbocharger 1
6 77067 DAMPER 1
AN960C-616 WASHER, 3/8 plain 2

LW-14634 TO LW-13651 ATTACHING PARTS

7 STD-1421 BOLT, 5/16-18 x 7/8 in. long 1

8 STD-596 NUT, 3/8-24 plain 1
STD-678 WASHER, Internal lock, 3/8 1

9 LW-10066 SPACER, Turbocharger bracket 1

TURBO BRACKET TO CRANKCASE ATTACHING PARTS

10 LW-10089 SPACER, 13/16 OD x 13/32 ID x 59/64 long 1

11 LW-11105 LOCKPLATE, 3/8 in. dia. bolt 2
12 STD-2128 BOLT, Hex hd., 3/8-16 x 4-11/16 in. long 2
13 STD-2045 NUT, Self-locking, 3/8 in. 2

14 78840 SUPPORT, Turbo strut 1

ATTACHING PARTS

15 STD-1959 BOLT, Hex hd., 3/8-16 x 1-5/8 in. long 1

16 78592 LOCKPLATE, 3/8 in. bolt (Between 78840
and STD-1959) 1

24
 TIGO-54i-D1B

SECTION 6 (CONT.)

Page 6-3 - Figure 29 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.
17 STD-2045 NUT, Self-locking, 3/8-24 in. 1

18 LW-10836 STRUT, Turbocharger 1

ATTACHING PARTS
19 STD-1115 BOLT, Hex. hd., 3/8-24 x 1-1/2 in. long 1
20 STD-2045 NUT, Self-locking, 3/8-24 in. 1

21 LW-14947 BRACKET, Turbocharger strut 1

TURBOCHARGER STRUT BRACKET TO TURBOCHARGER

STRUT ATTACHING PARTS

22 STD-2010 BOLT, Hex hd., 5/16-18 x 1-9/16 in. long 1

23 STD-2043 NUT Self-locking, 5/16-18 1
24 STD-2157 BOLT, Hex hd., 5716-18 x 7/8 in. long
(Use to replace existing turbo bolts
to attach LW-14947 to turbo) 2
25 LW-13652 SUPPORT, Turbo bracket 1
26 STD-475 WASHER, Internal lock, 5/16 in. 2
27 STD-1838 BOLT, Hex hd., 5/16-18 x 15/16 long 2
28 STD-2045 NUT, Self-locking, 3/8-24 1
30 STD-1342 SPACER, 7/8 OD x 3/8 ID x 1/8 thick 4

Page 6-5 - Figure 30

1 LW-14594 TRANSITION ASSEMBLY 1

2 LW-14636 STUD, 3/8-16 x 1-5/8 in. long 3
3 STD-1932 BUSHING, 1/4 to 1/8 NPT 1
4 STD-405 PLUG, Square hd., drilled, 1/8-27 NPT 1
5 AN960C616 WASHER, Plain, 3/8 in. 4
6 STD-1998 BOLT, Hex hd., 3/8-24 x 1-7/16 in. long 1
7 MS20500-624 NUT, Self-locking, 3/8-24 4
adj. 45 ° (in crankcase) 1
73944 ELBOW, 1/4 tube,
72376 ELBOW, 1/4 tube, adj. 90° (in actuator
outlet) 1
LW-12878-4S-170 HOSE ASSY., (Crankcase to actuator inlet) 1
72377 ELBOW, 3/8 tube, adj. 90° (actuator
outlet) 1
LW-12877-6S-280 HOSE ASSY., (Actuator outlet to controller
inlet) 1
LW-14948 ELBOW, 3/8 NPT x 1/4 NPT, female 1
AN816-6 NIPPLE, 1/4 NPT to 3/8 hose 1
LW-12877-6S-200 HOSE ASSY., (Crankcase to turbo oil in-
let) 1
25
 TIGO-541-D1B

SECTION 6 (CONT.)

Page 6-5 - Figure 30 (Cont.)

Ref. Qty.
No. Part No. Description Per Assy.
76734 ZIP STRAP 3
LW-14653 HEAT SHIELD 1
LW-14654 BRACKET, Heat shield support, rear 1
LW-14655 BRACKET, Heat shield support, top 1
MS21919-G10 CIIP, 5/8 ID x no. 10 hole 1
MS21919-G12 CLIP, 3/4 ID x no. 10 hole 1
STD-860 SCREW, No. 10-32 x 5/8 long, fill. hd. 2
STD-425 WASHER, Plain, no. 10 2
AN365-1032C NUT, Self-locking, no. 10-32 2

Page 6-7 - Figure 31

1 LW-13938 GASKET Exhaust flange 12

2 LW-14619 MANIFOLD ASSY., Left 1
3 LW-14611 PIPE, Exhaust cyl. no. 1 1
4 LW-11400 ADAPTER, Exhaust pipe, cyl. head 1
5 LW-14613 PIPE, Exhaust cyl. no. 3 1
6 LW-14615 PIPE, Exhaust cyl. no. 5 1
7 LW-14617 PIPE, Exhaust, left, rear 1
9 LW-14620 MANIFOLD ASSY., Right 1
10 LW-14613 PIPE Exhaust cyl. no. 2 1
11 LW-11400 ADAPTER, Exhaust pipe, cyl. head 1
12 LW-14614 PIPE, Exhaust cyl. no. 4 1
13 LW-14616 PIPE, Exhaust cyl. no. 6 1
14 LW-14618 PIPE, Exhaust, right rear 1

ATTACHING PARTS

16 STD-2044 NUT, Self-locking, 1/4-20 24

19 LW-14525 CLAMP, Exhaust pipe 2
21 LW-15437 CABLE ASSY., Exhaust manifold retainer 2
22 STD-2178 WASHER, Plain, 1/4 in. 4
23 STD-2177 BOLT, Hex hd., 1/4-20 x 15/16 in. 4
24 STD-2044 NUT, Self-locking, 1/4-20 4
LW-14952 HEAT SHIELD, Freon compressor 1
LW-15592-8-28 CLAMP, 1-7/8 - 2-5/16 x 9/16 in. wide 2

26
 TECHNICAL
PUBLICATION REVISION
REVISION No. PUBLICATION PUBLICATION No. PUBLICATION DATE
TIGO-541-EA Parts PC-121 November 1975
PC121-1 Catalog

The page(s) furnished herewith are intended to replace the corresponding page(s)
of the publication indicated above. If additional copies of the revision are re-
quired they may be obtained from Lycoming Division. See Service Letter
No. L114Q for further information on Lycoming service publications.

Previous revisions to this publication This revision consists of:-

September 1976
None Pages 6-4 and 6-5
Reprinted May 1991
Including This Revision
 AVCO LYCOMING

ART CATALOG

TIGO-541 SERIES
AIRCRAFT ENGINES

AVCO LYCOMING WILLIAMSPORT DIVISION

AVCO CORPORATION
WILLIAMSPORT, PENNSYLVANIA 17701

PC-121 Nov. 1275

 INTRODUCTION

This illustrated parts catalog provides parts coveragefor the Avco Lycoming TIGO-541
SeriesAircraft Engines.In addition to the illustrations a numerical parts list aids in finding a
specific part by its number. Also included is a complete parts breakdown of Vendor
accessories,as well as ServiceReplacementKits.

SERVICE BULLETINS, INSTRUCTIONS AND LETTERS

Although the information in this catalog is up-to-date at the time of publication, users
are urged to keep abreast of later information through Avco Lycoming ServiceBulletins,
Instructions and Letters which are available from all Avco Lycoming distributors or from
the factory by subscription. Consult the latest edition of Service Letter No. L114 for
subscription information.

NOTE

The illustrations, pictures and drawings shown in this publication are typical of the
subject matter they portray; in no instanceare they to be interpreted as examplesof any
specificengine,equipment or part thereof.
 TIGO-541 SERIES
TABLE OF CONTENTS
SECTION PAGE
INTRODUCTION .................................................... i

TABLE OF CONTENTS ............................................... .......... ii

OVERSIZE AND UNDERSIZE PARTS LISTING .......................................... iii

1 - Crankcase Assembly and Related Parts Listing

Crankcase Assembly .............. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Oil Pressure Relief Valve and Oil Level Gages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Engine Mounting Brackets ........... ......................................... 1-5
Crankcase Attaching Parts ........... ...................................... ... 1-7
Crankshaft and Counterweight Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
Propeller Shaft and Drives ........... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Starter Drive Assembly ............. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Accessory Drive Gears ............. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Torquemeter Oil Pump Assembly ....... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Accessory Covers and Gaskets ......... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
Compressor Drive ................ ....................................... 1-17
Oil Cooler Bypass Valve ............ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
Tachometer Drive ................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

2 - Cylinder, Piston, Rings and Connecting Rod Gro up

Piston, Piston Rings and Connecting Rod . . ...................................... ... 2-1
Cylinder Assembly ............... ......................................... 2-2
Intercylinder Baffles .............. ..................................... .... 2-4
External Parts for Oil Cooled Exhaust Valve G uides ................................... .2-6

3 - Oil Sump and Oil Pump Assembly Group

Oil Sump, Oil Pump and Oil Suction Screen Assemblies ................................... 3-1
Oil Filter Assembly ............... ..................................... .... 3-3

4 - Induction System
Fuel Distribution Section ........... ..................................... .... 4-1
Fuel Injector and Controller Linkage ..... ......................................... 4-3
Fuel Drain System ............... ...................................... ... 4-5
Fuel Pump Assembly .............. ........................................ .4-7

5 - Electrical Components
Magnetos and Magneto Drives ......... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Ignition Harness ................. ......................................... 5-3
Alternator and Drive .............. ..................................... .... 5-5
Starter and Drive ................ ..................................... ... .5-7

6 - Turbocharger, Bypass Valve and Exhaust Manifo ding

Turbocharger Assembly ............ ......................................... 6-1
Turbocharger Mounting ..... . . . . . ...................................... ... 6-3
Exhaust Bypass Valve Assembly . . . . . . ..................................... .... 6-5
Exhaust Manifolding ....... . . . . . . ..................................... .... 6-7

7 - Numerical Parts Index ....................................... . . . . . . . . ... .7-1

8 - Vendor Accessory Section

Starter, (Prestolite, 24 Volt) ......... .......................................... 8-1
Alternator, (Prestolite, 24 Volt - 100 Amp) ................... ................... .... 8-2
Magneto, 1200 Series, Bendix ........ .......................................... 8-3
Fuel Injector, Bendix RSA-10DB2 ..... .......................................... 8-5
Turbocharger (AiResearch, T18A21) .... ................... ................... .... 8-9
Exhaust Bypass Valve (AiResearch) .... ......................................... 8-11
Variable Pressure Controller (AiResearch) ......................................... 8-13

9 - Avco Lycoming Service Kits

Seal and Gasket Set .............. ...................... ............... .... 9-1
Cylinder, Piston and Ring Assembly .... ......................................... .9-2
Starter Slip Coupling Shaft Kit ....... .... . . ......................... ........ 9-2

10 - Parts Supersedures ............... .. ..... 10-1

ii
AVCO LYCOMING TIGO-541 PARTS CATALOG

List of Available Oversize and Undersize Parts

PARTNO. OVERSIZE UNDERSIZE

P2 P3 P5 P6 P7 P10 P11 P12 P15 P20 P22 P30 P33 P75 P125 M3 M6 M10

74876 X X X X X
76968 X X X X X
71903-A,-B SEELATESTEDITIONOF
77001-A,-B SERVICE
INSTRUCTION
NO.113 FORAPPLICATION
LW-11576 I X X X
LW-13335 X
72217 X X X
LW-12688 X X X
71894 X X
76077 X X X X
79046 X X X X
69260 X
66670 X X
LW-10647 X X
25C-8 X X X
25C-9 X X X
25C-10 X X X
25C-12 X X X
25C-18 X X X
25CD-18 X X X
31C-17 X X
31CD-20 X X X
38-13 X X X
38-14 X
38-17 X X X
38-18 X
38-23 X X X
38-25 X X X
38-28 X X X
50-16 X X X
50-52 X X X
69943 X X X
68510 X X
68437 X X X
67528 X X X
61261 X X X

NOTE I

When ordering oversize or undersize parts, be sure to specify the required oversize or undersize dimension, along with the
proper part number. For example: to order bearing LW-115 76 in .006 undersize, order P/N LW-115 76M6. Code letter P
stands for oversize while code letter M is undersize.

iii
 AVCO LYCOMING TIGO-541 PARTS CATALOG
CRANKCASE ASSEMBLY AND RELATED PARTS GROUP
CRANKCASE ASSEMBLY

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER \\\\\\\\\\\\\\\\\\\\\\\

1 LW-14052 CRANKCASEASSEMBLY 1
2 -STD-1984___ DOWEL, 11/16 i .OD x 11/16 in.long
(solid)
3 TD-1943
STD-3 ___ DOWEL, 11/16 in.OD x 9/16 ID
11/16 in.long
4 LW-10734 DOWEL, Crankshaft learing 3
LW-10647 DOWEL Crankshaftbearing 8
5 38-14 STIJD,_3/8-16x 1-3/4 in.long 24
6 50-16 STUD, 1/2-13 x 2.00 in long 12
7 38-17 __ STJD, 3/8-16 x 2-1/8 in.long 6
8 38-23 STUD,3/8-16 x 2-7/8 in.long 6
9 67528 _ STUD,5/16-18 x 1-5/8 in.long 4
10 61261 STUD, 5/16-18 x 1-1/2.in.long 4
11 31CD-20 STUDDrilled,5/16-18 x 2-1/2 in.
ong . 4
12 25CD-18 STUD Drilled,1/4-20x 2-1/4 in.
long 6
13 25C-10 STUD, 1/4-20 x 1-1/4 in.long 6
14 69943 STUD, 1/4-20 x 1-13/32 in.long 8
15 68510 STUD, 1/4-20 x 1-1/16 in.long 1
16 25C-9 STUD, 1/4-20 x 1-1/8 in.long 2
17 68437 STUD, 5/16-18 x 1-7/8 in.long 4
18 25C-18 STUD,1/4-20 x 2-1/4 in.long 1
19 50-52 STUD, 1/2-13 x 6-1/2 in.long 1
20 38-25 STUD, 3/8-16 x 3-1/8 in.long 1
21 STD-2035 DOWEL, 5/16 in.dia.x 1/2 in.long 1
22 LW-11256 BUSHING,Starter housing 1
23 STD-1353 INSERT,Heli-coil,no.10-24x 3/8
in. long 2
24 STD-1774 PIN, 1/8 in.dia.x 1/4 in.long 2
25 25C-12 STUD, 1/4-20 x 1-1/2 in.long 4
26 STD-784 PLUG, Allen head,3/8in.NPT 7
27 STD-405 PLUG, Squarehead,1/8in.NPT 1
28 STD-355 PLUG, Allen head,3/4in.NPT 2
29 1102 PLUG, Allen head.1/8in.NPT 7
30 STD-1339 PLUG, Alien head,1/16in.NPT 9
31 STD-1003 DOWEL 1/4 OD x 3/16 ID x 1/2 in.
long _ 2
32 38-18 STUD 3/8-16 x 2-1/4 in.long 1
33 38-28 _ STUD, 3/8-16 x 3-1/2 in.long 1
34 AN913-OS PLUG, Sq.hd.,drilled,1/16NPT 1
35 AN932-6 PLUG, Allen hd.,3/4 NPT 1
36 STD-1173 INSERT, 1/4-20 x 1/2 long 1
37 38-13 STUD, 3/8-16 x 1-5/8 long 1
38 LW-13615 NOZZLE, Reductiongear,lubricating 1
39 _73772 NOZZLE ASSEMBLY,listoncooling 6
40 31C-17 STUD, 5/16-18 x 2-1/8 in.long (Gov.pad)
(Driven ht.of studs,1.44in.) 4

1-1
 35 27

36

Figure 1 CRANKCASEASSEMBLY
l-2
 AVCO LYCOMING TIGO-541 PARTS CATALOG
CRANKCASE ASSEMBLY AND RELATED PARTS GROUP
OIL PRESSURE RELIEF VALVE AND OIL LEVEL GAGES

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

1 1028-B _ BALL, 11/16 in.dia.

=-\\\\\\\\\\
1
2 LW-11138 SPRING,Oil pressure relief valve 1
3 STD-1045 GASKET,1-1/4ID x 1-1/2OD x 3/32
in. annular 1
4 77808 VALVE ASSY.,Oil pressure relief 1
5 TD-294 GASKET,7/8 OD x 5/8 ID x 3/32
annular 1
6 LW-11886 TUBEASSEMBLY, Oil Levelgage 1
7 71621 CLIP,3/8 in.ID for 1/4 in.screw 1
8 LW-10081 GAGE ASSY., Oil level (left engine)
9 LW-10080 GAGEASSY.,Oil level(right engine) 1
10 STD-1733 RING, Oil seal,1/4 ID x 1/16 dia. 1
11 78361 BACKET, Oil level gage

PARTS
BRACKETATTACHING

12 STD-8 WASHER,Plain,1/4 in. 2

13 STD-160 WASHER,Internal lock,1/4 in. 2
14 STD-705 BOLT,Hexhd.,1/4-20x 11/16in.long 1
15 STD-1499 BOLT, Hex.hd.,1/4-20x 1/2 in.long 1
16 STD-1411 NUT, Plain,1/4-20

17 70457 GASKET,Oil filler extension 1

18 LW-10391 CAPAND EXTENSIONASSY.,Oil filler 1
19 LW-10383 ASSY.,Oil filler
EXTENSION
20 LW-10526 CAP ASSY., Oil filler 1
21 LW-10385 CHAIN ASSY., Oil filler

1-3
Figure 2 OIL PRESSURE RELIEF VALVE AND OIL LEVEL GAGES
1.4
 AVCO LYCOMING TIGO-541 PARTS CATALOG
CRANKCASE ASSEMBLY AND RELATED PARTS GROUP
ENGINE MOUNTING BRACKETS, LIFTING STRAP AND ATTACHING PARTS

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

1 77663 _ BRACKET,
Enginemounting,lower
left 1
2 77664 BRACKET,
Enginemounting,lowerright
3 77678 BRACKET,Enginemounting,upper
right
4 77677 BRACKET, left
Enginemounting,upper

6 PARTS
ATTACHING

6 STD-33 WASHER,Plain,3/8 in. 16.

7 STD-678 WASHER, Internal lock,3/8in. 16
8 STD-2053 BOLT, Hex.hd.,3/8-16 x 2-5/8 in.long 2
9 STD-1994 BOLT, hd.,3/8-16x 2-7/ in.long 5
STD-2111 BOLT,Self-sealing,3/8-16 x 2-7/8
hex. hd. 1
10 STD-2055 BOLT,3/8-26x 4-7/16in.long 5
STD-2107 BOLT, Self-sealing,3/8-16x 4-7/16
hex. hd. 1
11 STD-2037 BOLT,3/8-16x 4-11/16in.long 1
STD-2128 BOLT,Self-sealing,3/8-16 x 4-11/16
hex. hd. 1

12 75688 STRAP,Lifting 1

ATTACHINGPARTS

13 STD-8 WASHER,Plain,1/4in 3
14 STD-160 WASHER,Internallock,1/4in. 1
15 STD-1575 BOLT,Hexhd.,1/4-20-x-15/16 in.
long 1
16 STD-1411 Plain,1/4-20
NUT, 1

17 72707 EYE,Lifting,rightside 1
18 78447 EYE, Lifting,leftside 1
19 78448 SPACER,Lifting eye 2
20 LW-10937 E Hydraulic
ER, 12

NOTE:SeeServiceInstructionNo. 1248for locationof enginemountattachingbolts.

1-5
 II IO
\

Figure 3 ENGINE MOUNTING BRACKETS LIFTING STRAP AND ATTACHING PARTS

 AVCO LYCOMING TIGO-541 PARTS CATALOG
CRANKCASE ASSEMBLY AND RELATED PARTS GROUP
CRANKCASE ATTACHING PARTS
1
QUANTITY PER ASSEMBLY
FIG. PART DESCRIPTION
REF. NUMBER

1 74888 STUD,1/2-20x 11-1/2in.long 6

1 STD-143 WASHER,1/2 plain 6
1 STD-2090 NUT, 1/2-20plain 6
2 75714 STUD,1/2-20x 9-25/32in.long 2
2 STD-143 WASHER,1/2 plain 2
2 STD-2090 NUT, 1/2-20plain 2
2 LW14044__ WASHER,1/2in.sealat starterpad 2
3 75713 STUD,1/2-20 x 8-13/32in.long
3 STD-143 WASHER,1/2 plain 1
3 STD-2090 NUT, 1/2-20plain 1
4 75782 STUD,1/2-20x 5-17/32in.long 2
4 STD-143 WASHER,1/2 plain 2
4 STD-2090 NUT, 1/2-20plain 2
5 75712 STUD,1/2-20x 6-21/32in.long 1
5 STD-143 WASHER,1/2 plain 1
5 STD-2090 NUT, 1/2-20plain 1
6 75799 STUD,1/2-20x 8-5/32in.long 1
6 STD-143 WASHER,1/2 plain 1
6 STD-2090 NUT, 1/2-20plain
7 75170 BOLT,1/2-20x 9-7/8 in.long 2
7_ STD-143 WASHER,1/2 plain 2
7 STD-2090 NUT, 1/2-20plain 2
7 STD-1940 WASHER,1/2 in.dia. (seal) 2
8 STD-1948 BOLT,1/4-20x 2-11/16in.long 8
8 STD-8 WASHER,1/4 plain 18
8 STD-160 WASHER,1/4 lock 9
8 STD-1411 NUT, 1/4-20plain 9
8A STD-1575 BOLT,1/4-20x 2-15/16long _ 1
MS20002C8 WASHER, Countersunk 2
9 STD-1948 BOLT,1/4-20x 2-11/16in.long 1
9 STD-8 WASHER,1/4 plain 1
9 STD-160 WASHER,1/4 lock 1
9 STD-1411 NUT, 1/4-20plain 1
10 STD-1414 BOLT,1/4-20x 1-1/2in.long 5
10 STD-8 WASHER,1/4 plain 5
10 STD-160 WASHER,1/4 lock
10 STD-1411 NUT, 1/4-20plain 5
11 STD-2084 BOLT,1/4-20x 1-3/4 in.long 4
11 STD-8 WASHER,1/4 plain 4
11 STD-160 WASHER,1/4 lock 4
12 STD-1419 BOLT,1/4-20x 1-1/8in.long 2
12 STD-8 WASHER,1/4 plain 2
12 STD-160 WASHER,1/4 lock 2
13__ STD-1951 BOLT,1/4-20x 3-5/8in.long
13 STD-8 WASHER,1/4 plain 1
13 STD-160 WASHER,1/4 lock 1
14 STD-1952 BOLT 1/4-20 x 2-1/8in.long 1
14 STD-8 WASHER,1/4plain 1
14 STD-160 WASHER,1/4 lock 1
_14 STD-1411 NUT, 1/4-20plain 1
15 STD-1830 BOLT, 1/4-20 x 3-1/16 in.long 1
15 STD-160 WASHER,1/4 lock 1
15 STD-1411 _ NUT, 1/4-20plain 1
16 STD-2015 BOLT,5/16-18x 3-1/8in.long 1
16 STD-35 WASHER, 5/16 plain 1
16 STD-475 WASHER,5/16 lock 1
17 STD-1979 BOLT,3/8-24x 2-13/16in.long 1
1-7
 AVCO LYCOMING TIGO-541 PARTS CATALOG
CRANKCASE ASSEMBLY AND RELATED PARTS GROUP
CRANKCASE ATTACHING PARTS

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

17 STD-33 WASHER,3/8 plain 2

17 STD-678 WASHER,3/8 lock 1
17 _383-B NUT,3/8 plain 1
18 STD-1420 NUT, 5/16-18slotted 4
18 STD-35 WASHER,5/16plain 4
19 72075 SEAL,Oil,.47ID_x .09 dia.section 1
20 STD-1864 NUT, 1/4-20slotted 6
20 STD-8 WASHER.1/4plain un

Figure 4
1-8
 AVCO LYCOMING TIGO-541 PARTS CATALOG
CRANKCASE ASSEMBLY AND RELATED PARTS GROUP
CRANKSHAFT AND COUNTERWEIGHT ASSEMBLY, CAMSHAFT ASSEMBLY

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

1 75670 CRANKSHAFTAND COUNTERWEIGHT

1
75458 CRANKSHAFTASSEMBLY 1
2 74876 BUSHING,
Crankshaft
dynamic
counterweight 10
3 76968 BUSHING, Crankshaft dynamic
counterweight(2nd order) 2
4 74768 GEAR,Crankshaft 1
5 69641 ^ DOWELRearcrankshaft gear 2
6 74770 LOCKPLATE, Crankshaft gear ___
7 STD-477 BOLT,Hex.hd.,1/4-28x 3/4 in.long 3
8 75462 USHING,Front crankshaft spline 1
9 75359 DOWEL,Frontcrankshaft spline
bushing 3
10 75637 COUNTERWEIGHT ASSY.,Dynamic
(3rd order) 5
11 71903 BUSHING,Dynamiccounterweight 20
12 77002 _ COUNTERWEIGHT ASSY.,Dynamic
(2nd order) 1
13 77001 BUSHING, Dynamiccounterweight 4
14 75631 ROLLER,Dynamiccounterweight,3rd
order 10
15 77007 ROLLER,Dynamiccounterweight,2.01
order 2
16 71907 WASHER,Dynamiccounterweight 20
17 71906 RING,Internalretaining 20
18 77004 WASHER,Dynamiccounterweight,2nd
order 4
19 77005 RING,Internalretaining 4
20 LW-11576 BEARING,Crankshaft 8
21 75517 BEARING,Propeller drive gear 2
22 75519 BEARING,Propeller shaft 2
23 LW-12440 CAMSHAFT ASSEMBLY 1
24 STD-1066 DOWEL,Stepped,.310 and .251 dia.x
13/32in.long 1
25 74769 GEAR,Camshaft 1
26 72078 LOCKPLATE, 5/16 in.bolt x 1-21/64in.
spacing 2
27 STD-679 BOLT,Hex.hd.,5/16-24x 27/64in.long 4

1-9
\ 4’
\
\
\
\

\
\

l-10
 AVCO LYCOMING TIGO-541 PARTS CATALOG
CRANKCASE ASSEMBLY AND RELATED PARTS GROUP
PROPELLER SHAFT, GENERATOR AND STARTER DRIVES

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

75557 GEAR, Propellergovernordriven 1

2 LW-13081 PROPELLER SHAFTAND GEAR
ASSEMBLY 1
3 75538 SHAFT.Propeller 1
4 LW-12122 _ SEAL,Propeller shaft,oil(solid) 1
5 75618 CAP,Thrustbearing 1
6 75619 SHIM,Thrustbearing cap
7 77454 SLINGER,Thrust bearing,oil 1
8 LW-13335 BEARING,Thrust
9 75562 GEAR,Propeller haft driven_ 1
10 AN5008-20 CONE,Propellerhub 1
11 AN5007-20 CONE,Propellerhub 1
12 76715 _ NUT, Propellershaft,
lock 1
13 STD-2076
.. KEY,Woodruff,3/16 in.x 5/8 in.dia. 1
14 75546 GEAR Propellershaft,gov.drive 1
15 75822 SPRING,1-1/l6 in.OD x 1-57/64inlong 1
16 77015 GEARASSY.,Generator and starter
17 75537 SHAFTGEAR, Generator and starter 1
18 77016 ADAPTER,Spring 1
19 LW-12519 GEARASSY.,Propellershaft drive 1
20 75553 GEAR,Propellershaft drive 1
21 LW-12518 RACE,Thrustbearing,rear 1
22 LW-11739 TUBE,Propelleroil supply 1
23 LW-10123 TUBE,Propelleroil transfer 1
24 MS29513-133 "0" RING,1-51/64ID x 0.103in.dia.
section
25 MS16625-200 RING,Internalretaining 1
26 LW-11738 SEAL,.070 dia.section,x.431 ID 1

26
2

23
25

Figure 6
1-11
 AVCO COMING TIGO-541 PARTS CATALOG
CRANKCASE ASSEMBBLY AND RELATED PARTS GROUP
STARTER DRIVE ASSEMBLY

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

1 LW-11953 __DRIVEASSEMBLY, Starter

2 LW-11784 ADAPTERASSY.,Starterdrive
3 LW-11780 BUSHING,1.00in.lD x 1-3/16in
OD flanged 2
4 STD-859 DOWEL,1/8 in.dia.x1/4 in.long
5_ LW-11952_ _ WASHER, Thrust
6 LW-10727 SEAl, 2-1/8 OD x 1-5/16ID x 5//16
in. wide 1
7 LW-11781 ___ SPACER, _Starter drive gear
8 LW-12241_ SHAFTGEAR, Starterdrive
9 75395 G EAR,Starterdrive
10 75843 NUT,5/8-18,crimpLock
11 STD-1004 RING.Oil seat.7/32ID x 1/16 in.di
section 1
12 _ MS28775-147
_ RING,Oil seal,2-39/64 IDx 1-1/32
dia. section 1

ADAPTERATTACHINGPARTS

13 STD-35 WASHER,Plain,5/16in. _ 4
14 STD-475 WASHER,Internallock5/16in. _ 4
15 STD-1410__ NUT, Plain,5/16in. 4

/
/

Figure 7
1-12
CRANKCASE ASSEMBLY AND RELATED PARTS GROUP
ACCESSORY DRIVE GEAR3

QUANTITY PER ASSEMBLY

DESCRIPTION

Figure 8
1-13
 AVCO LYCOMING TIGO-541 PARTS CATALOG
CRANKCASE ASSEMBLY AND RELATED PARTS GROUP
TORQUEMETER OIL PUMP ASSEMBLY

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

1 LW-13519 SHIM,Torquemeteroilpumpbody _ 1
2 72075 SEAL,Oil,3/32sectionx 15/32ID 2_
3 MS28775-148 SEAL, Oil,"o" ring
4 STD-8 WASHER,1/4 plain
5 STD-160 WASHER,1/4 lock 4
6 STD-1411 NUT, 1/4-20plain
7 LW-13440 THRUSTBEARING,Prop.shaft
drivegear 1
8 LW-13441 SEAT,Thrustbearing 1
9 LW-13439 COVERASSY.,Torquemeter oil
pump
10 STD-557 DOWEL,1/2 dia.x 1-11/16long 1

6 2

3-

Figure 9
1-14
 AVCO LYCOMING TIGO-541 PARTS CATALOG
CRANKCASE ASSEMBLY AND RELATED PARTS GROUP
ACCESSORY COVERS, GASKETS AND ATTACHING PARTS (CRANKCASE)

QUANTITY PER ASSEMBLY

FIG. PAR
RT DESCRIPTION
REF. NUM BER

1 76546 GASKET,Propellercontrolaccess 1
2 LW-11874 BREATHER SEPARATOR 1
3
LW-11873 TUBE,Breatherdrain 1
78844 HOSE,3/4 ID x 2-1/2 in.long 1
STD-211 CLAMP,.56 to 1.06 rangex 1/2 wide 2

ATTACHINGPARTS

3 STD-8 WASHER,Plain,1/4 in. 4

4 STD-160 WASHER,Internallock,1/4in. 4
_5 STD-1204 BOLT,Hex.hd.,1/4-20
x 15/16in.long 4

6 72741 GASKET,Timing pin hole cover 1

7 72540 COVER,Timingpin hole 1

ATTACHING
PARTS

STD-28 WASHER.Plain.no.10 2
9 STD-251 WASHER,Internallock,no.10 2
10 STD-82 SCREW,Fill.hd.,no.10-24
x 1/2 in.
long 2

11 LW-1305
2 PLATE,Prop.shaftoil seal retainer 2
12 511 SPACER,Thrust bearingcap nut 12

ATTACHINGPARTS

13 STD-33 WASHER,Plain,3/8in. 6
14 5
STD-2045 NUT,Self-locking,3/8-24 6

15 72053 GASKET,Governor 1
16 72378 COVER,Governordrive 1

ATTACHINGPARTS

17 STD-35 WASHER,Plain,5/16in. 20
18 STD-475 WASHER,Internal lock,5/16in. 4
19 STD-141
0 NUT, Plain,5/16-18 4

20 8313 GASKET,Vacuumpump 2
21 60430 COVER,Vacuumand hydraulicpump 2

ATTACHING
PARTS

22 STD-8 WASHER.Plain.1/4 in. 8

23 STD-160 WASHER,Internallock,1/4in. 8
24 STD-141
1 NUT, Plain,1/4-20 8

25 STD-208 SEAL,0il,7/8 ID x 1-1/2OD x 5/16

in. wide 2
26 8313 GASKET,Tachometerdrive 1
27 60430 drive
COVER,Tachometer 1

ATTACHING
PARTS

28 STD-8 WASHER,
Plain,1/4in. 4
29 STD-160 WASHER,Internallock,1/4in. 4
1-15
 TIGO-541 PARTS CATALOG
CRANKCASE ASSEMBLY AND RELATED PARTS GROUP
ACCESSORYCOVERS, GASKETSAND ATTACHING PARTS (CRANKCASE)

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

5
4
2
--

Figure 10
l-16
 AVCO LYCOMING TIGO-541 PARTS CATALOG
CRANKCASE ASSEMBLY AND RELATED PARTS GROUP
COMPRESSOR DRIVE

FIG. PART DESCRIPTION

REF. NUMBER

1 78585 SHAFT, Compressor drive 1

2 77707 GASKET, Crankcase rear 1
3 76240 ADAPTERASSEMBLY,
Compressor
drive 1
4 76230 BUSHING,Flanged,1.00 ID x 1-/8
in. 1
5 STD-394 DOWEL,3/32 dia.x 11/32 in.long 1
6 STD-1934 SEAL,Oi1,1.00in.ID x 1-5/8OD x
3/8 in.wide 1

ADAPTER ATTACHING PARTS .

7 STD-35 WASHER,
Plain,5/16 in. 6
8 STD-475 WASHER,Internallock,5/16in. 6
9 LW-31-1.09 BOLT,Hexhd.5/16-18 x 1-3/32 in.
.
10 STD-2057 KEY, Woodruff,5/32x 5/8 in.(special) 1
11 LW-10516 PULLEY, Compressor drive 1
12 AN960-1216 WASHER, 5/64 ID x 1-5/16 00 x 3/32
in. thick
13 STD-1035 _ NUT, Slotted shear3/4-16 1
14 STD-761 PIN, Cotter,3/32 dia.x 1.00 in.long 1

LW-1D955 BELT, Compressordrive 1

STD-1342* SPACER,7/8 OD x 3/8 ID x 1/2 in.
ong..
_
* - Usedto attachfreon compressor.

1 11 3 2

9 8 7
4 5 10

Figure 11
1-17
 AVCO LYCOMING TIGO-541 PARTS CATALOG
CRANKCASE ASSEMBLY AND RELATED PARTS GROUP
OIL COOLER BYPASS VALVE ASSEMBLY

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

1 LW-12515 GASKET,Oil coolerbypasshousing 1

2 LW-13247 HOUSINGASSY.,Oil coolerbypass
valve
3 LW-12896* SEAT,Thermostatic controlvalve 1
4 STD-1986 INSERT,Heli-coil,1.00-14
NF-3 1

HOUSING
ATTACHINGPARTS

5 STD-8. WASHER,Plain,1/4 in. 10

6 STD-160 WASHER,Internal lock,1/4 in. 10
7 STD-1948_ BOLT,1/420 NC-3x 2-11/16in.long 1
8 STD-1688 BOLT, 1/4-20 NC-3 x 1.00 in long 5
STD-2084 BOLT,1/4-20NC-3x 1-3/4in.long 4

10 LW-13230 VALVE ASSY.,Temp.control,oil

coolerbypass 1
11 STD-294 GASKET,7/8 in.ODx 5/8 in.lD x 3/32
in. annular 1
12 1540 PLUG,Thermometer
well 1
- Not illustrated.

Figure 12
1-18
CRANKCASE ASSEMBLY AND RELATED PARTS GROUP
TACHOMETER DRIVE GROUP

QUANTITY PER ASSEMBLY ,

DESCRIPTION

I 2 46

Figure 13
1-19
 AVCO LYCOMING TIGO-541 PARTS CATALOG
CYLINDER, PISTON, RINGS AND CONNECTING RODS GROUP
PISTON, PISTON RINGS AND CONNECTING ROD

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF.

1
NUMBER

LW-10545-S ratio
PISTON, 3 ring,(compression
\\\\\\\\\\\\\\\\\\\\\\\\\\
7.3:1) 6
2 74241 RING,Piston,compression 12
3 73857 RING, Piston,oil
4 LW-14078 PIN, Piston
5 72198 PLUG,Pistonpin 12
6
6 LW-13422 CONNECTING RODASSY. 6
12
7 65819 BUSHING, Connecting
rod,upper
8 LW-12596 _ BOLT, Connectingrod
12
9 LW-12186 __NUT, Connecting
rod bolt
10 72217* _ BEARINGConnecting rod 12
* - Available in undersizeM03, M06 and M10.

9
10

Figure 14
2-1
 AVCO LYCOMING TIGO-541 PARTS CATALOG
CYLINDER, PISTON, RINGS AND CONNECTING ROD GROUP
CYLINDER ASSEMBLY AND RELATED PARTS

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

__1 LW-13561 CYLINDERAND HEADASSY.,

(nitrided) 6
2 STD-2090 NUT, 1/2-20,plai __ 26
3 383-B NUT,3/8-24,plain _ 24
4 LW-12688 SEAT,Intakevalve 6
5 _ 71894 SEAT, Exhaust valve
6 76077 GUIDE,Valve,intake
7 79046 GUIDE,Vave,exhaust (ni-resist) 6
8 69260-P10_ INSERT, Sparkplug,18-1.5MM
(longreach) 12
9 25C-10 STUD,1/4-20x 1-1/4in.long 24
10 25C-8 STUD,1/4-20x 1.00in.long 12
11... 66670 BUSHING,Rockershaft. 24
12 STD-1872 INSERT,Heli-coil,1/8-27 NPT 6
13 72706 INSERT,Heli-coil,1/4-20 NC x
3/8.in.long 12
STD-148 NIPPLE,Union,(fueldrainlines) 6
76423 _ BAFFLE,_Center fin pack 6
STD-1925 SCREW,1/4-20x 5/8 in.long 6
STD-8 WASHER, Plain
1/4 in. 6
74887 SPACER, 7/8 in.ODx 0.52 in.ID x
3/8 in.thick 2
14 71481 RING,Oil seal 6
15 LW-13087 VALVE, Intake,(hollow stem) 6
16 LW-11082 VALVE,Exhaust,(rotator type) 6
17 LW-13321 SEAT,Valvespringlower,intake 6
18 76093 SEAT,Valvespringlower,exhaust 6
19 LW-11798 SPRING,Valve,Guter 12
20 LW-11799 SPRING,Valve,auxiliary 12
21 LW-10077 SEAT,Valvespring 6
22 60009 KEY, Valve 12
23 LW-10076 SEAT,Valvespring(rotatortype) 6
24 MS13997-3 KEY, Valverotatortype 12
25 MS13998-3 CAP,Valvestem 6
26 LW-10937 LIFTER, Hydraulic 12
27 74906 GASKET,Shroudtube adapter 6
28 LW-13566 ADAPTER, Shroudtube 6
29 STD-8 WASHER,Plain,1/4in. 18
30 STD-160 WASHER,Internallock,l/4 in. 18
31 STD-1875 BOLT,1/4-20x 13/16in.long 18
32 LW-13339 SHROUD TUBE ASSY.,Pushrod 12
33 LW-13565 _ SPRING,Shroud tube 12
34 LW-13340 WASHER, 25/32 ID x 1-1/4OD x 1/32
in. thick 24
35 70310 SEAL,Shroudtube 24
36 76180 RODASSY.,Push- Total of un
36 76181 RODASSY.,Push- 12 req'd. un
36 76182 RODASSY.,Push- Selecttor un
36 76183 RODASSY.,Push- fit. un
37 76266 ROCKERASSY.,Valve 12
38 76242 BUSHING, Valverocker 12
39 72626 SHAFT,Valverocker 12
40 66732 GASKET,Valverockershaft cover 12
41 72710 COVER,Valverockershaft 12
42 72709 SCREW,1/4-20__x 5/8in.long 6
43 STD-160 WASHER,Internallock1/4 in. 18
44 STD-1411 NUT Plain,1/4-20 18
2-2
 AVCO LYCOMING TiGO-541 PARTS CATALOG
CYLINDER, PISTON, RINGS AND CONNECTING ROD GROUP
CYLINDER ASSEMBLY AND RELATED PARTS

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

45 76036 GASKET,Rockerbox cover 6

46 76038 COVERASSY.,Rockerbox
47 STD-2059 SCREW,1/4-20x 5/8 in.long
74494 reachcaution
_ PLATE_Spark_plug 6
48 71549 _ WASHER,Valverocker
LW-11665 THRUSTBUTTONRockershaft 4

47

15

26

Figure 15
2-3
 AVCO LYCOMIING TIGO-541 PARTS CATALOG
CYLINDER, PISTON, RINGS AND CONNECTING ROD GROUP
INTERCYLINDER BAFFLES

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

1 78692 BAFFLEASSEMBLY, Intercylinder 4

2 71610 HOOK,Intercylinder
baffle retaining 4
3 71611 RETAINER,Intercylinderbaffle 4
4 AN931-4S16* GROMMET, 1/4 ID x 1-1/4in.ODsplit 1
5 76557 PLUG, Button,1-5/32 OD 3
6 STD-8* WASHER,Plain,1/4 in. 1
7 STD-160** WASHER,Internallock,1/4in. 1
8 STD-1968** BOLT,Hex.hd.,1/4-20
x 5/8 in.long

AN931-12S23 GROMMET3/4 ID 1-3/8 0D x 3/8

in. thick 1
9 LW-12094 HOSE,1-5/8ID x_53/64wall x 2-5/8
long (split) cyl.no.1-3-4-6 4
10 LW-12095 HOSE,1-5/8ID x 53/64wall x 3-5/8
long (split) cyl.no.2 1
11 STD-1530 CLAMP.1-3/4in.ID x 9/16 in.wide 5
12 STD-8+ WASHER Plain,1/4 in. 8
13 STD-1412+ SCREW,Fill.hd.,1/4-20
x 5/8 long _4
14 STD-1685+ NUT, Self-locking,1/4-20 4
STD-8$ WASHER,Plain,1/4in. 2
15 STD-160$ WASHER,Internallock,1/4in. 2
16 STD-1875$ BOLT,Hex.hd.,1/4-20x 13/16in.
long __ _ 2
17 STD-2125& NUT, Clip floating 2
18 STD-425& WASHER,Plain,no.10 2
19 STD-1686& SCREW, Fill.hd.,no.10-32x 7/16 long 2
STD-8*+ WASHER,Plain,1/4 in. 4
STD-1412*+ SCREW,Fill.hd.,1/4-20 x 5/8 long_
STD-1685*+ NUT, Self-locking,1/4-20
STD-2125*$ NUT, Clip floating _ 2
STD-425*$ WASHER,Plain,no.10 2
STD-1686*$ SCREW,No.10-32x 7/16in.long 2
STD-8*& WASHER,Plain,1/4in. 1
20 STD-1826*& SCREW,1/4-20x 5/8 long 1
* - Assemble
in bafflebetweencylindersnumbers4 and 6.
** - Install in no. 1 front cylinder baffle hole.
+ - To attach plate assemblyto braces.
$ - To attachbracesto crankcases.
& - To attachplate assembly to baffle retainer.
*+ To attachplate assembly to braces.
*$ - To attachplate assembly to baffleretainer.
*& - To attachbaffle at no. 6 cylinder.
NOTE: STD-1826maybe alternated with STD-1412.

2-4
 II
\\ I

Figure16 INTERCYLINDER BAFFLES

2-5
 CYLINDER, PISTON, RINGS AND CONNECTING ROD GROUP
EXTERNAL PARTS FOR OIL COOLED EXHAUST VALVE GUIDES
I I
QUANTITY PER ASSEMBLY
.

REF. NUMBER

Figure 17
2-6
 AVCO LYCOMING TIGO-541 PARTS CATALOG
OIL SUMP AND OIL PUMP ASSEMBLY GROUP
OIL SUMP, OIL PUMP AND OIL SUCTION SCREEN ASSEMBLIES

QU ANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

1 75585 GASKET,Oil sump

2 LW-11155 SUMP ASSEMBLY,Oil
3_ STD-1173 INSERT,Heli-coil,1/4-20
x 1/2 in.
long 2
4 77646 DOWEL, Oil pump inlet 1
5 STD-551 ___ PLUG, Sq.hd.,drilled,1/2-14NPT
6 AN932-5 PLUG, Allen head,1/2-14NPT 2
7 71140 FITTING, Breather

ATTACHING PARTS

8 STD-8 WASHER,Plain,1/4 in. 36 _

9 STD-160 WASHER,Internallock,1/4in. 36
10 STD-2039 x 1/2 in.long
BOLT, Hex.hd.,1/4-20 8
11 STD-1688 BOLT,Hex.hd.1/4-20x 1.00 in.long 22
12 .STD-2001 BOLT Hex.hd.J/4-20x 3-1/2in.long 2
13 STD-1887 BOLT,Hex..,1/4-20 x 4.00 in.long 4

14 STD-1272 GASKET,Oil suctionscreen 1

15 77644 _ SCREEN,
Oil suction 1
16 77645 _ __ PLUG, 1-1/2-18 thd.x 1.00 hex.hd. 1
17 MS28775-121 RING,Oil seal,1-3/64ID x .103 dia.
_ section 1
18 LW-13024 PUMP__Oil assembly 1
19 77898 BODYASSEMBLY, Oil pump 1
20 75'145 DOWEL, Oi pump_outlet 1
21 76964 SHAFT,_Oilpumpidler 1
22 AN380C4-6__ PIN, Cotter,1/8in.dia.x1-1/2
in. ong _ 1
23 76970 IMPELLER, Oil pump driven 1
24 76971 IMPELLER, Oil pump driving 1
25 LW-13026 COVER, Oil pump 1
26 LIN-13022 VALVE ASSY.,Relief 1
27 76824 SHAFT,oil pumpdrive 1
28 STD-1941 PIN, 3/16 in.dia.x7/8 in.long 1
29 STD-8 WASHER,Plain,1/4in. 10
30 STD-2003 BOLT,Hex.hd.,drilled end,1/4-20
x3-1/16 long 2
31 STD-2005 _ BOLT Hex.hd.,drilledend,1/4-20
x 2-7/32 long 2
32 STD-2004 BOLT_ Hex.hd.drilled end,1/4-20
x 2-13/32 long. 1
33 STD-1409 NUT Slotted shear,1/4-20 5
34 MS28775-120_ RING,Oil seal,1.00ID x .103 dia.
section _ 1
35 LW-10738 BAFFLE,.Camshaft gear__ . 1
36 STD-35. WASHER,Plain,5/16in. _ 3
__37 STD-1955 BOLT,5/.16-18x4-1/4 in.long 3
38 LW-2511.75__ BOLT,hex.drilled hd.,1/4-20x
3/4 in.long 2

3-1
 Figure Ref. nos. 8 and 9
used with attaching bolts.
letter A locates boltsfigure
ref. no. II

Figure 18 OIL SUMP, OIL PUMP AND OIL SUCTION SCREEN ASSEMBLIES
3-2
 AVCO LYCOMING TIGO-541 PARTS CATALOG
OIL SUMP AND OIL PUMP ASSEMBLY GROUP
OIL FILTER ASSEMBLY

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

1 LW-12517 GASKET,Oil filter adapter

2 76549 ADAPTER ASSY., Oil filter housing 1
3 STD-1989 INSERT, Heli-coil,7/8-14NF3 x
1/2 long 1
STD-1849 NF3 x
INSERT,Heli-coil,3/4-16
3/4 long
77607 SLEEVE, Oilrelief valve
5 STD-8 WASHER,1/4 plain 4
6 STD-160 WASHER,1/4 lock 4
7 STD-1411 NUT, 1/4-20 plain 1
8 STD-1952 BOLT,1/4-20x 2-1/8in.long 2
9 LW-1688 BOLT,1/4-20 x 1.00 in.long 1
10 LW-11198 ELEMENT, Oil filter
11 LW-12258 HOUSINGASSY.. Oil filter 1
12 STD-1872 _INSERT, HeIi-coil,1/8-27NPT. - .
STD-405 PLUG, 1/8-27 NPT,square hd. 1
13 AN901-10C GASKET,Copper,7/8in.ID x 1-1/8
ODby .05 thick 1
14 LW-12262 BOLT ASSY, Oil filter housing" 1
15 76539 SEAT, Oil relief valve 1
16 76542 SPRING,Oil relief valve 1
17 STD-589 GASKET,Copperasbestos 1
18 76541 PLUG,Oil relief valve 1
19 1W-12259 PLATE, 0il filter bolt,
torque
caution 1
20 LW-13905* FILTERASSY.,Oil (optional) 1
21 LW-13904* KIT,Converterplate oil filter 1
* - SeeServiceInstructionNo.1319for applicationof spin on full
flow oil filters for theseengines.

3-3
 AVCO LYCOMING TIGO-541 PARTS CATALOG
INDUCTION SYSTEM
FUEL DISTRIBUTION SYSTEM

FIG. PAR DESCRIPTION

REF. NUMB ER

_ 1 LW-13889 HOUSING
ASSY.,Induction 1
2 75660 SPACER,Inductionhousing 1
3 STD-8 WASHER,Plain,1/4 in.
4 STD-160 WASHER,Internal lock,1/4in. 3
5 STD-2028 BOLT, 1/4-20 x 5-21/32 in.long 1
6 STD-2027 BOLT,1/4-20x 4-13/32in.long
7 72377 ELBOW 3/8 in.tubing,adj.90°
_8 74070 ELBOW,3/8in.tubing,adj.45°
77627 ELBOW,1/4 in.tubeto 18 NPT 1
75948 TEE, 1/4.in.tubing.adjustable
9 AN929-4_ CAPASSY. 1/4 in.flaredtube
fitting 3
10 STD-1164 INSERT Heli-coil.5/16-18
x 5/8 4
11..... MS122200 INSERT. Heli-coil.no.10-24x
_ 31/64 long
12 STD-2134 INSERT,Heli-coil,7/16-20
x
3/4 .
STD-514 _ WEL, 5/16 in.dia.x 1/2 in.long 2
13 _ 76291 _COVER,Pressurizing valve 1
14 STD-28 WASHER,
Plain,no.10 4
15 STD-1896 SCREW,No.10-24x 7/8 in.long 4
16 76399 VALVE ASSY.,Pressurizing
_17 76286 SEAT Pressurizing
valve 1
18 76292 VALVE AND DIAPHRAGM 1
19 76288 SPRING,Pressurizing 1
20 75955 PLUG, Induction housingseal 1
21 75957 RING,Oil seal,11/16 in.ID x
0.07 in.dia. 1
22 MS16625-1081 RING,Internalretaining,13/16in. 1
23 1102 PLUG,Allen head,1/8-27 NPT 6
24 LW-11980 NOZZLEASSY.,Fuel injection 6
25 LW-11602 LOCKPLATE, Inlectornozzle 6
26 75741 PIPE,Intake,cyl.no.1 1
27 75742 PIPE, Intake,cyl.no.2 1
28 75743 PIPE, Intake,cyl.no.3 1
29 75744 PIPE.Intake.cyl.no.4 1
30 75745 PIPE,Intake,cyl.no.5 1
31 75746 PIPE.Intake,cyl.no.6
32 72711 RING. Seal,intakepipes 6
33 71973 ___ GASKET, 2 bolt flange 6
34 74360 FLANGE.Intakepipe,upper 6
35 STD-8 WASHER,Plain,1/4
in. 12
36 STD-160_ WASHER,Internal lock,/4 in. 12
37 STO-1215 BOLT,1/4-20x 1-1/4in.long 12
38 77623* LUG,Inductionhousinq 2
39 7622* SUPPORT,Induction housing lug 1
40 STD-2042*_ BOLT,Hex.hd.,1/4-20
x 1-3/16
in. long 2
41 STD-820* _ WASHER 2
42 STD-160* WASHERInternallock,1/4in. 2
43 STD-1204 __ BOLT 1/4-20 x 15/16 in.long 1
44 STD-160* WASHER,Internal lock,1/4 in. 1
45 STD-8* WASHER, Plain,1/4 in. _ 1
46 STD-160* WASHER,Internal lock,1/4 in.
47 STD-1887* BOLT,Hex.hd.,1/4-20
x 4.00
in. long 1
48 STD-1411* NUT, 1/4-20,plain 1
SeeAvco LycomingServiceInstructionNo.1234for properinstallation 4-1
heseparts.
Figure 20 FUEL DISTRIBUTION SYSTEM
4.2
 AVCO LYCOMING TIGO-541 PARTS CATALOG
INDUCTION SYSTEM
FUEL INJECTOR AND CONTROLLER LINKAGE GROUP

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

1 LW-11508 FUEL INJECTOR, (ModelRSA10DB-1)

Bendix2524423-4
2 STD-1727 WASHER, Plain,.33ID x 3/4 OD x
.13 4
3 STD-475 WASHER,5/16 lock 4
4 STD-1828 BOLT 5/16-18 x 1-5/16 in.long _ 4
5 73032 GASKET,Air inlet housing 1
MS29512-6 SEAL,Oil,15/32ID x 5/64 dia.
section 1
6 AN815-6 UNION, 3/8 tube
7 75940 _ TUBE ASSY., Fuel injector to
inductionhousing 1
LW-10797 CONTROLSHAFT ASSEMBLY 1
8 76195 TUBE,Crossshaft control
SUPPORT 1
9_ 75771 __ SPACER,Controller,lever 1
10 _ LW-10796 LEVER, Crossshaft control
11 75795 LEVER,Controller
12 STD-1896 SCREW,No.10-24x 7/8 in.long _
13 76194 SHAFT, Fuel injector linkage
14 77741 SUPPORT,Crossshaft control
(right) 1
15 75768 Crossshaft control
SUPPORT,
(left) 1
LW-13760 SLEEVE,Heatshrinkable
AN500A8-7 SCREW,No.8-32x 7/16 in.long 1
STD-1756 WASHER,3/4 dia. 1
16 MS9047-104 PIN, 1/8 dia.x 3/4 in.long 3
17 LW-12309 ROD,Connecting,inlector 1
18 75791 ROD, Connecting,controller
78370 SPACER,3/16 ID x 5/16 OD x 5/8
in. long 1
19 STD-63 NUT, No.10-32plain 4
20 AN3-7 BOLT,No.10-32x 29/32in.long 3
* 1
AN3-14 _ BOLT,No.10-32x 1-17/32in.long
21 STD-303 NUT,No.10-32,slotted 4
22 STD-68 PIN, 1/16 x 1/2 in.long 4
23 STD-122 WASHER,13/64ID x 5/16 OD x 1132
thick 11
STD-705** BOLT,1/4-20x 11/16in.long 1
STD-1411 NUT, 1/4-20plain 1
STD-160** WASHER, 1/4 lock 2
STD-8** _ WASHER,1/4 plain 1
24 LW-10753 SHIELD,Cross shaft - right 1
_25 LW-11446 SHIELD,Crossshaft-left 1
26 LW-1342 __ RODEND,Injector controllerrod 4
27_ 74944 GASKET,Turbocontrolleradapter 1
28 78858 ADAPTERASSY.,Turbocontroller 1
_29 STD-783 PLUG.1/4-18NPT(sockethead) 1
30 STD-1102 1/827 NPTalen
PLUG, 3
31 STD-1727 ID x 3/4 in.OD
WASHER,_Plain,.33
x .13 4
32 STD-475 WASHER,5/16 lock 4
33 LW-31-1.09 BOLT, 5/16-18 x 1.09 in.long 4
34 LW-13037 TUBEASSY. Inductionhousingto
controller housing
_35 MS29512-6 SEAL,OiL15/32ID x 5/64 in.dia.
section
4-3
 AVCO LYCOMING TIGO-541 PARTS CATALOG
INDUCTION SYSTEM
FUEL INJECTOR AND CONTROLLER LINKAGE

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

36 LW-12745 CHECKVALVE,Vent line 1

37 73314 GASKET,Densitycontroller
38 LW-11950 CONTROLLER, Absolutepressure,
variable
39 STD-28 WASHER,No.10,plain
40 STD-251 _WASHER, No.10lock
41 STD-375 SCREW,No.10-24x 5/8 in.long 4
42 72377 ELBOW,3/8 tube,adjustable 90
(variablecontrolleroutlet) 1
MS29512-6 SEAL,0il,15/32 ID x 5/64 in.dia.
section
°
43 74070 ELBOW,3/8 tube,9/16st.thread,45 ,
variablecontrollerinlet
°
AN822-6-6 ELBOW,3/8 tube to 3/8 NPT,90
LW-10758 TUBE ASSY., Controllerdrain
44 _LW-12154 HOSE,3-1/2 ID x 2-5/8long
45 LW-10539 CLAMP,Hose,4.00 in.dia.
46 61548 PLATE,Name
STD-1901 DRIVESTUD,No.4 x 3/16 in.long, 2
roundhead
47 60096 GASKET,Fuel pump
48 77537 ADAPTERASSY.,Controllerdrain
49 STD-784 PLUG,Sockethd.,3/8-18NPT
50 STD-33 WASHER, Plain,3/8in.
51 STD-678 WASHER,Lock,3/8 in.
52 STD-1957 BOLT,Hex.hd.,3/8-16 2
* - Attachescontrolrod to controller.
** - Attachingpartsfor shields:right shielduses1 STD-1411 and 1 STD-160.
Left shielduses1 STD-705,1 STD-160,and 1 STD-8.
29

21 22 17

Figure 21
4-4
 AVCO LYCOMING TIGO-541 PARTS CATALOG
INDUCTION SYSTEM
FUEL DRAIN SYSTEM

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

1 75890 GASKET,Fuel draincheckvalve

2 LW-13342 HOUSING ASSY.,Fuel drain checkvalve 1
3 AN822-3 ELBOW,90 flaredtube,pipe 1
4 AN823-3 ELBOW,45 flaredtube,pipe 1
AN825-4 TEE, 1/8-27NPTto 7/16-20thd. 1
MS29513-015 RING.Oil seal,l/2 ID x 1/16
section
5 75087 SPRING.Fueldrain checkvalve 1
6 LW-13344 PLUNGERFueldrain checkvalve 1
7 STD-1006 SEAL."O" ring..44ID x .103
dia. section 1
STD-8* WASHER,1/4 plain 2
STD-160* WASHER,1/4 lock 2
STD-1411* NUT, 1/4-20plain 2
8 77941 MANIFOLDASSY.,Fuel drain,right 1
9 77942 MANIFOLDASSY.,Fueldrain,left 1
10 STD-148 NIPPLE, Union 4
11 STD-2166 ELBOW,Union,90° 2
12 AN822-3 ELBOW,900 flaredtube,pipe
thd. 2
13 STD-8 WASHER,1/4 plain 2
13 STD-160 WASHER, 1/4 lock 2
13 STD-1204 BOLT,1/4-20x 15/16in.long 2
14 77921 TUBE ASSY., Manifold to check valve
(right)
15 62254 CLIP,3/16 in.lD for 1/4 dia.screw 2
16 77919 TUBEASSY.,Manifoldto checkvalve
(left) 1
17 62254 CLIP,3/16 in.ID for 1/4 dia.screw 1
18 LW-12098-4-124 TUBEASSY.,Cyl.1,2,4 3
19 LW-12098-1-100 TUBEASSY.,Cyl.3 1
20 LW-12098-1-200 TUBEASSY.,Cyl.5 1
21 LW-12098-1-183 TUBEASSY.,Cyl.6 1
22 73650 CLIP, 1/4 ID for 1/4 dia.screw 6
23 72036 CLIP,3/4 ID for 3/16 dia.screw 6
24 STD-28 WASHER,No.10plain 6
25 STD-969 SCREW,No.10-32x 1/2 in.long 6
26 STD-670 NUT,No.10-32self-locking 6
* - Attachingpartsfor housing75909.

4-5
AVCO LYCOMING TIGO-541 PARTS CATALOG

18

24-25-26

18 23 22
24-25-26

23 18
22
16
19
13
9
12
8

16 12

20 17
23 14

Figure 22 FUEL DRAIN SYSTEM

4-6
 AVCO LYCOMING TIGO-541 PARTS CATALOG
INDUCTION SYSTEM
FUEL PUMP ASSEMBLY AND ATTACHING PARTS

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

1 LW-10799 SPACER Fuel injectorpump 1

2 LW-139l9 PUMPASSEMBLY,Fuel
3 STD-35 WASHER,Plain,5/16 in. 4
4 STD-475 WASHER,Lock,5/16 in. 4
5 STD-1410 NUT, Plain5/16-18 4
6 STD-213 SEAL,Oil,3/4 ID x 1-3/8 OD x 5/16
in. wide 1
7 78067 ELBOW.1/4tube to 1/8 NPT,vent 1
8 78523 ELBOW,3/8tube to 3/8 NPT(outlet) 1
9 76422 ELBOW,1/2 tube to 21/64 NPT(inlet) 1
10 76869 TUBE ASSY.,Fuelpumpto injector 1
11 LW-11838 __TUBE ASSY.,Fuelpumpto induction
housing 1
12 73650* CI-AMP, 1/4 ID cushiontype 1
13 74117 BRACKET, Injector line,90° (attach
to shroudtubeadapter) 1
14 STD-28 WASHER,Plain,no.10 1
15 STD-860 SCREW,Fill.hd.,no.10-24x 5/8 in.
long 1
16 STD-670 NUT, Self-locking,no.10-24 1
* - Not illustrated.

4-7
Figure 23 FUEL PUMP ASSEMBLY AND ATTACHING PARTS
4-8
 AVCO LYCOMING TIGO-541 PARTS CATALOG
ELECTRICAL COMPONENTS
MAGNETOS AND MAGNETO DRIVES GROUP

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

_1 75473 SHAFTGEARASSY.,Magdrive 1
2 69565 SLEEVE,Magneto
drive shaft 1
3 75467 COUPLINGASSEMBLY,Magneto,
intermediate 1
4 69565 SLEEVE, Magnetodrive shaft
5 LW-12136 CUSHION,Magnetodrive 4
6 6920 COUPLING,Magnetodrive 2

ATTACHING
PARTS

7 10-90788-5 KEY, Woodruff 2

8 10-4093 WASHER 2
9 10-163151 NUT 2
10 10-90751-19 PIN, Cotter 2

11 LW-12681 GASKET Magneto 2

12 LW349310-4 MAGNETO.Right.S6RN-1209
___
(10-349310-4) 1
13 LW-349290-2 Left,S6LN-1208
MAGNETO
(10-349290-2) 1

ATTACHINGPARTS

14__ 75965 CLAMP, Magneto 4

15 STD-475 _WASHER, Internal lock,5/16 in. 4
16 STD-1410 NUT,Plain,5/16-18 4

-1200 SERIES
PRESSURIZED
MAGNETOS

LW-349610-1 MAGNETO, Ignitionsystem 1

LW-349510-1 MAGNETO, Right,S6RN-1259 1
LW-349490-1 MAGNETO, Left,S6LN-1258 1
LW-620580-11 HARNESS, Ignition 1
LW-14074 ADAPTER,Magnetopressurization 1
AN816-4 NIPPLE,1/4 flaredtube 2
AN822-4 ELBOW,1/4 flaredtube,1/8NPT90° 2
LW-12784-4-110HOSE,Magnetoto mag.press.adapter
left
LW-12784-4-074HOSE,Magneto tomag.press.adapter
right
MS29512-04 SEAL, Oil,1/16sect.x11/32 1
LW-13134 VALVE ASSY.,Relief 1
NOTE: Attachingpartsfor pressurized
magnetos and harness
are sameas for
standardmagnetos.

5-1
RIGHT MAGNETO

LEFT MAGNETO

Figure 24
5.2
 AVCO LYCOMING TIGO-541 PARTS CATALOG
ELECTRICAL COMPONENTS
IGNITION HARNESS ASSEMBLY, SHIELDED

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

1 _LW-620580-1 CABLE ASSY. Ignition,shielded,

3/4-20 sparplugs 1
2 10-620633-48 LEAD ASSY., 48 in.long 6
3 10-620633-72 LEAD ASSY, 72 in.long 6
4 10-320602 FERRULE, Outer _ 12
5 10-320601 __ FERRULE, Inner 12
°
6 10-320573-3 ELBOW,Spark plug,110 12
7 2
7 -2
10-32029 CLAMP
8 10-320298-2 CLAMP 2
9 10-320298-3 CLAMP 1
10 10-320299-1 CLAMP 1
11 10-320476-1 CLAMP 4
12 _ 10-320232_ CLAMP
13 10-320432-1 CLAMP 1
14 10-320416-1 CLAMP 2
15 10-78916 BRACKET 1
16 10-89027-4 BRACKET 1
17 10-349661-2 PLATE 2
18 10-163011 _ FERRULE 12
19 10-349226 GROMMET 2
20 10-163012 EYELET 12
21 10-32326 SPRING 12
22 10-94225-2 SPRINGASSEMBLY 12
23 10-320582 SLEEVETERMINAL 12

HARNESSATTACHING PARTS

24 STD-160 WASHER,Internal lock,1/4 in. 11

25 STD-705 BOLT, Hex.hd.,1/4-20x 11/16 in.
long 6
26 73152 BRACKET,_Supportclamp 1
27 STD-1968 BOLT, Hex.hd.,1/4-20x 5/8 in.long 1
28 STD-1685 NUT, Self-locking,1/4-20 1
29 STD-1650 BOLT, Hex.hd.,no.10-32x 21/32
in. long 2
30 STD-28 WASHER,Plain,no.10 2
31 STD-670 NUT, Self-locking,no.10-32 2
32 STD-2081 SCREW,Fill.hd.,self-locking,1/4-20
x 7/8 in.long 4
33 77156 PROTECTOR,Ignition cable
(assembleontop leads) 6
34 1182-R5* SPARK PLUG, AC-283,3/4-20
(plat. electrode) 12
35 1182-K4 SPARK PLUG, RHB-36W 12
36 1182-55* SPARK PLUG, AC-273,3/4-20
(massive electrode) 12
* - Optional spark plugs.

NOTE

The abovesparkplugsarethoseusedin currentproductiononly; this list doesnot includeadditionalsparkplugsthat areapprovedfor use

in theseengines.Seelatestedition of ServiceInstructionNo. 1042for completelistingof all approvedsparkplugs.

5-3
 7 6 I

2-

8 12
24-
30-
20
I I.

IO

Figure 25 IGNITION HARNESS ASSEMBLY, SHIELDED

5-l
 AVCO LYCOMING TIGO-541 PARTS CATALOG
ELECTRICAL COMPONENTS
ALTERNATOR AND ALTERNATOR DRIVE

QUANTITY F'ER ASSEMBLY

FIG. PART DESCRIPTION
I
REF. NUMBER

1 AN4047-1 GASKET,Accessory drive 1'

2 LW-14464 COUPLING ASSY.,Alternatordrive
2A__LW-14472 SPRING,Alternatordrivecoupling 1
3 LW-10261 ADAPTER,Alternatordrivecoupling 1
4 LW-10259 ADAPTERASSY.,Alternator 1
5 31-12 STUD,5/16-18x 1-1/2in.long 4

ADAPTER ASSEMBLY
ATTACHINGPARTS

6 STD-33 WASHER Plain,3/8 in... 6

7 STD-678 WASHER,Internallock,3/8in. 6
8 STD-596 NUT, Plain,3/8-24 6

9 W-10264 _ GASKET,Alternator adapter 1

10 LW-10256 ALTERNATOR,
24V-100Amp.

ALTERNATOR
ATTACHINGPARTS

11 STD-3 5 WASHER,Plain,5/16in.__ 4
12 STD475 WASHER,Internallock,5/16in. 4
13 STD-37 NUT,Plain,5/16-24 4
14 MS9047-077 ROLL,Pin

15 LW-10179* REGULATOR,Full transistorvoltage

16 78060* RELAY,Overvoltage 1

17 75539 ADAPTERASSY.,Generator drive

1
18 STD-859 DOWEL,1/8 dia.x 9/32 in.long 1
19 75536 1-1/8 ID x _
BUSHING, Flanged,
1-1/2OD 1
20 STD-1339 PLUG, Allen hd.,1/16-27NPT _ 2
21 LW-10727 SEAL,0il,2-1/8 OD x 1-5/16ID x
5/16 in. wide 1
22 STD-2068 SCREW,Nylon lock1/4-20x 1-1/8
in. long 2
23 STD-8 WASHER,Plain,1/4 in. 2
24 LW-11778 WASHER,Thrust 1
25 75500 GEARASSY.,Generator drive 1
26 STD-1004 RING.Oil seal 7/32D x 1/16 dia.
section 1
27 AN124001 ID x 1/8 dia.
RING.Oil seal,3-7/8
section 1
* - Not illustrated.

5-5
AVCO LYCOMING TIGO-541 PARTS CATALOG
13

II
10

-14

3
10

2A

9
7

21
22-23
17
26- 20

27
19
18
211

25

Figure 26 ALTERNATOR AND ALTERNATOR DRIVE

5-6
 AVCO LYCOMING TIGO-541 PARTS CATALOG
ELECTRICAL COMPONENTS
STARTER ASSEMBLY AND STARTER DRIVE

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

77900 HOUSINGASSY. Starter drive 1

2 25C-12 STUD, 1/4-20 x 1-1/2 in.long 3
3 STD-997 DOWEL, Oil,5/16 in.dia.x 11/16
l
4 77870 SHAFT, Starter idler gear
5 STD-1133 DOWEL,1/8 in.dia.x 13/16 in.long 1
6 STD-514 DOWEL, 5/16 in.dia.x l/2 in.long 2

STARTER DRIVE HOUSING

ATTACHING PARTS

7 STD-8 WASHER Plain,1/4 in 6

8._ STD-160 WASHER,Internal lock,l/4 in
9. STD-1411 NUT,Plain,1/4-20 6

10 75566 COUPLINGASSY.Starterslip 1
11 75510 SHAFT, Bendix drive 1
12 76528 GEAR ASSY.,Starter slip coupling 1
13 76835 BUSHING,Slip coupling
14 STD-1025 KEY, 5/8 in.dia.x 1/8 in. 1
15 76842 _ COUPLING,Starter slip 1
16 76836 WASHER, Thrust,slip coupling 1
17 75521 COUPLINGASSY., Bendix 1
18 73051 PIN, 1/4 in.dia.x 25/32 in.long 1
19 75655 WASHER,Thrust,9/16 in.ID x 1-1/8 in.
OD x 1/16 in.thick 1
20 LW-11329 GEAR ASSY. ,Starter idler 1
21 77987 BEARING,1/2 in.lD x 11/16 in.OD
x 1/16 in.thick 1
22 78791 STARTER ASSY., Prestolite24V 1

STARTERATTACHING PARTS

23 STD-8 WASHER,Pain,1/4 in. 7

24 STD-160 WASHER,Internallock,1/4in. 7
25 STD-1215 BOLT Hex.hd.1/4-20 x 1-1/4 in.
long 4
26 STD-1411 NUT, Pain,1/4-20 3

27 78789 PLATE, Starter retaining 1

28 76815 STUD, Starter retaining plate 2
LW-11515* HOSE,l/4 in. ID x 5/8 0D x 2-5/16
in,long 2

PLATE ATTACHING
PARTS

29 STP-8 WASHER,Plain,1/4 in. 2

30 STD-160 WASHER,Internal lock,1/4 in. 4
31 STD-1411 NUT, Plain,1/4-20 4

32 LW-12085 SWITCH,MagneticPrestolite(SAW-
441-1) 1
on
* - Assemble 76815 stud betweenstarter drive housingand starter
retainingplate.

5-7
AVCO LYCOMING TIGO-541 PARTS CATALOG

27

28

26
-24
22

2
20 25
-
13 12
16
15
10

18

14
II
4

19

3
Figure 27 STARTER ASSEMBLY AND STARTER DRIVE
5-8
 AVCO LYCOMIING TIGO-541 PARTS CATALOG
TURBOCHARGER, BYPASS VALVE AND EXHAUST MANIFOLDING
TURBOCHARGER ASSEMBLY

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

1 LW-13234 TURBOCHARGER ASSY.,T18 A21 1

2 LW-12154 HOSE,3-1/2 in.ID x 3-11/16in.
long (.19.25 wall) 1
3 LW-10539 CLAMP,Hose,4.00 in.dia. 2
4 75371 GASKET,Turbocharger,oil inlet
5 76889 ADAPTER, Turbocharger oil inlet 1
6 AN822-6 ELBOW,Turbooil inlet 1/4in.tube
and 1/4 in.NPT,90° 1
7 _LW-10122 GASKET,Turbo oil drain adapter
8 .LW-11954 TUBEASSY..Turbineoil drain
..1.00in.dia. 1
9 STD-33 WASHER.Plain.3/8 in. 4
10 STD-678 WASHER, Internal lock,3/8 in. 4
11 STD-1946 BOLT,Hex.hd.,3/8-16
x 7/8 in.long 4
12 AN840-17 NIPPLE,1.00-11.5
NPTx 1.00ID
hose 1
13. LW-11373 HOSE, 1.00 ID x 1-3/8 OD x 2-1/2
in. long
14 LW-13060 BLANKET,Turbocharger 1
15 AN737TW46 CLAMP.Hose.1-3/8
in.OD 2

6-1
AVCO LYCOMING TIGO-541 PARTS CATALOG

Figure 28 TURBOCHARGER ASSEMBLY

6-2
 AVCO LYCOMING TIGO-541 PARTS CATALOG
TURBOCHARGER, BYPASS VALVE AND EXHAUST MANIFOLDING
TURBOCHARGER MOUNTING PARTS

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

1 LW-13649 BRACKET,Turbochargerand
compressor

ATTACHING
PARTS

2 AN6C-25A BOLT, Hex 3/8-24 x 2-49/64

in. long 2
3 MS20500-624 NU Self-locking,3/8-24 2
4 1-W-10090 SHIM,Turbo mounting(3 max.) un
5 LW-13651 BRACKET,Turbocharger 1
6 77067 DAMPER 1

LW-13649 TO LW-13651
ATTACHING PARTS

7 STD-1421 BOLT,Hex.hd.,5/16-8
x 7/8 in.
long
8 STD-596 NUT, 3/8 plan
STD-678_ WAS.ER., 3/8.lock ._.. ___

9 LW-10066
.. .... SPACER-Turbocljiaie bracket .. 1

TURBO BRACKETTO CRANKCASE

ATTACHING PARTS

10 LW-10089 SPACER, 13/16 OD x 13/32 IDx 59/64

long
11 LW-11105 LOCKPLATE, 3/8 in.dia.bolt 2
12 STD-2128 BOLT, Hex.hd.,3/8-16x 4-11/16 in.
long 2
13 STD-2045 NUT, Self-locking,3/8 in. 2

14 78840 Turbostrut
SUPPORT,

ATTACHING
PARTS
PARTS
ATTACHING

15 STD-1959 BOLT,Hex.hd.,3/8-16x 1-5/8in.

long 1
16 78592 LOCKPLATE, 3/8 in.bolt (between
78840and STD-1959) 1
17 STUD-2045 NUT, Self-locking,
3/8 in. 1

18 LW-10836 STRUT, Turbocharger 1

ATTACHING PARTS

19 STD-1115 BOLT,Hex.hd.,3/8-24x 1-1/2in.long 1

20 STD-2045 NUT, Self-locking,3/8 in. 1

21 78780 BRACKET, Turbocharger strut 1

TURBOCHARGER
STRUT BRACKEt
STRUT
TO TURBOCHARGER
ATTACHING PARTS

22 STD-2010 BOLT, Hex.hd.,5/16-18x 1-9/16 in.

long 6-3
 AVCO LYCOMING TIGO-541 PARTS CATALOG
TURBOCHARGER, BYPASS VALVE AND EXHAUST MANIFOLDING
TURBOCHARGER MOUNTING PARTS

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION

23 STD-2043 NUT,Self-locking,5/16-18 1
24 STD-2157 BOLT,Hex.hd.,5/16-18x 7/8 long 2
(Useto replaceexistingturbo
bolts to attach78780to turbo.)
25 LW-13652 SUPPORT, Turbo bracket
26 STD-475 WASHER, 5/16 internallock 2
27 STD-1838 BOLT,5/16-18self-locking 2
28 STD-2045 NUT, 3/8-24self-locking 1
29 LW-11904* BUSHING, Compressor mount 6
30 LW-11905* SPACER, Compressor mountbushings 3
31 LW-10961* WASHER,1-3/8OD x 25/64 ID x 1/8
thick 3
32 LW-10074* PLATE, Compressor
1
33 LW-11134* BUSHING. Retaining
34 STD-2091* BOLT, 3/8-24 x 2-7/16 long 3
35 511* SPACER,Thrust bearingcap nut 3
36 STD-2045* NUT, 3/8-24 self-locking 3

32-

* - Compressormounting plate and related parts, to be

used with turbo mounting bracket part no. LW-10063
only. See ServiceBulletin No. 344.

Figure 29 Figure 29A

6-4 Revised
September
1976
 AVCO LYCOMING TIGO-541 PARTS CATALOG
TURBOCHARGER, BYPASS VALVE AND EXHAUST MANIFOLDING
EXHAUST BYPASS VALVE ASSEMBLY

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

1 LW-11016 TRANSITION ASSEMBLY 1

2 LW-11015 STUD, No.10-24NF x 7/8 in.
long 2
3 STD-1932 BUSHING, 1/4 to 1/8 NPT 1
4 STD-405 PLUG, Squarehd.,drilled,1/8-27NPT 1
5 AN960C-616 WASHER,Plain,3/8 in. 8
6 STD-1998 BOLT, Hex.hd.,3/8-24x 1-7/16 in.
long 4
7 MS20500-624 NUT, Self-locking,3/8-24 4
8 LW-10759 VALVE ASSY., Exhaust bypass 1
9 LW-12125-3 COUPLING,V-band,2-1/4in.tube 1
10 LW-12093-6 COUPLING,V-band,2-1/4in.tube 1
11 75845 GASKET,V-band coupling,2-1/4in.
tube 2
°
12 LW-12088 ELBOW,3/8 in.tubing,adj.,45 1
13 LW-12877-6-066 HOSEASSY., Wastegate to oil galley 1
14 LW-13235 TEE, 1/4 in.and 3/8 in.tubing.Adj.
with straight thread on side 1
15 LW-12799-6-222 HOSEASSY., Wastegate to turbo
inlet 1
16 75739 NIPPLE, 3/8 in.tube,std.thread 1
17 LW-12799-6-150 HOSEASSY. 1
18 76734 ZIP STRAP 2

Revised
September1976 6-5
 5-6-7

9-l I

II

Figure 30 EXHAUST BYPASSVALVE ASSEMBLY

6-6
 AVCO LYCOMING TIGO-541 PARTS CATALOG
TURBOCHARGER, BYPASS VALVE AND EXHAUST MANIFOLDING
EXHAUST MANIFOLDING

QUANTITY PER ASSEMBLY

FIG. PART DESCRIPTION
REF. NUMBER

1 78056 GASKET,Exhaustflange 12
12
2 LW-13055 MANIFOLDASSY.,Left
1
3 78004 PIPE,Exhaust,cyl.no.1
4 77930 ADAPTER,Exhaustpipe,cyl.head 1
5 78005 PIPE,Exhaust,cyl.no.3 1
1
6 78286 PIPE,Exhaust,cyl.no.5
1
7 78008 PIPE,Exhaust,left-rear
1
8 LW-13027 PIPE, Rear exhaust adapter
1
9 LW-13054 MANIFOLD ASSY., Right
1
10 77427 PIPE,Exhaust,cyl.no.2 1
11 77930 ADAPTER,Exhaust pipe,cyl.head 1
12 78287 PIPE,Exhaust,cyl.no.4 1
13 78011 PIPE,Exhaust,cyl.no.6 1
14 78012 PIPE,Exhaust,right-rear 1
15 LW-13027 PIPE,Rearexhaust,adapter 1

ATTACHINGPARTS

16 STD-2044 NUT,Self-locking,1/4-20 24
17 LW-12093-5 COUPLING, V-band,2.00 in.tube 2
18 78083 GASKET,V-bandcoupling,2.00 in.
tube 2
19 LW-14504 _CLAMP,Exhaustpipe (2.10 ID) 2
20 LW-14525 CLAMP,Exhaustpipe (2.00ID) 2
21 LW-14572 CABLEASSY.,Exhaustmanifoldretainer 2
22 STD-2178 WASHER,1/4 plain 4
23 STD-2177 BOLT,1/4-20x 15/16long,hex.hd. 4
24 STD-2044 NUT, 1/4 self-locking 4

6-7
 AVCO LYCOMING TIGO-541 PARTS CATALOG

20

Figure 31 EXHAUST MANIFOLDING

6-8
AVCO LYCOMING TIGO-541 PARTS CATALOG
SECTION 7

NUMERICAL INDEX

PARTNO. PARTNAME PAGENO. PARTNO. PARTNAME PAGENO.

AN3-7 Bolt 4-3 STD-8 Washer 1-7

AN3-14 Bolt 4-3 STD-8 Washer 1-8
AN6C-25A Bolt 6-3 STD-8 Washer 1-14
AN380C4-6 Pin 3-1 STD-8 Washer 1-15
AN500A8-7 Screw 4-3 STD-8 Washer 1-18
AN737TW46 Clamp 6-1 STD-8 Washer 2-2
AN815-6 Union 4-3 STD-8 Washer 2-4
AN816-4 Nipple 2-6 STD-8 Washer 3-1
AN816-4 Nipple 5-1 STD-8 Washer 3-1
AN822-3 Elbow 4-5 STD-8 Washer 3-3
AN822-4 Elbow 5-1 STD-8 Washer 4-1
AN822-6-6 Elbow 4-4 STD-8 Washer 4-5
AN822-6 Elbow 6-1 STD-8 Washer 5-5
AN823-3 Elbow 4-5 STD-8 Washer 5-7
AN825-4 Tee 4-5 STD-28 Washer 1-15
AN840-17 Nipple 6-1 STD-28 Washer 4-1
AN901-10C Gasket 3-3 STD-28 Washer 4-4
AN913-OS Plug 1-1 STD-28 Washer 4-5
AN929-4 Cap 4-1 STD-28 Washer 4-7
AN931-4S16 Grommet 2-4 STD-28 Washer 5-3
AN931-12S23 Grommet 2-4 STD-33 Washer 1-5
AN932-5 Plug 3-1 STD-33 Washer 1-8
AN932-6 Plug 1-1 STD-33 Washer 4-4
AN960C-616 Washer 6-5 STD-33 Washer 5-5
AN960-1216 Washer 1-17 STD-33 Washer 6-1
AN4047-1 Gasket 5-5 STD-35 Washer 1-7
AN5007-20 Cone 1-11 STD-35 Washer 1-8
AN5008-20 Cone 1-11 STD-35 Washer
1-12
AN124001 Ring 5-5 STD-35 Washer 1-15
MS9047-077 Pin 5-5 STD-35 Washer 1-17
MS9047-104 Pin 4-3 STD-35 Washer 3-1
MS16624-1043 Ring STD-35 Washer
Washer 4-7
MS16625-200 Ring 1-11 STD-35 Washer 5-5
MS16625-1081 Ring 4-7 STD-37 Nut 5-5
MS29002C8 Washer 1-7 STD-63 Nut 4-3
MS2050O-624 Nut 6-3 STD-68 Pin 4-3
MS20500-624 Nut 6-5 STD-82 Screw -15
MS28775-120 Ring 3-1 STD-122 Washer -3
MS28775-21 Ring 3-1 STD- 43 Washer 1-7
MS28775-147 Ring 1-12 STO-143 2-2 2-2
MS28775-148 Seal 1-14 STD-148 Nipple 4-5
MS29512-04 Seal 5-1 STD-160 Washer 1-3
MS29512-6 Seal 4-3 STD-160 Washer 1-5
MS29512-6 Seal 4-3 STD-160 Wassher 1-7
MS29512-6 Seal 4-4 STD-160 Washer 1-19
MS29513-015 Ring 4-5 STD-160 Washer 1-14
MS29513-133 "0" Ring 1-11 STD-160 Washer 1-18
MS122200 Insert 4-1 STD-160 Washer 2-2
STD-8 Washer 1-3 STD-160 Washer 1-15
STD-8 Washer 1-5 STD-160 Washer 2-4

7-1
AVCO LYCOMING TIGO-541 PARTS CATALOG
SECTION 7

NUMERICAL INDEX (CONT.)

PARTNO. PARTNAME PAGENO. PART NO. PARTNAME PAGENO.

STD-160 Washer 3-1 STD-705 Bolt 1-3

STD-160 Washer 3-3 STD-705 Bolt 1-13
STD-160 Washer 4-1 STD-705 Bolt 4-3
STD-160 Washer 4-3 STD-705 Bolt 5-3
STD-160 Washer 4-5 STD-761 Pin 1-17
STD-160 Washer 5-3 STD-783 Plug 4-3
STD-160 Washer 5-7 STD-784 Plug 1-1
STD-208 Seal 1-15 STD-784 Plug 4-4
STD-213 Seal 4-7 STD-820 Washer 4-1
STD-251 Washer 1-15 STD-859 Dowel 1-12
STD-251 Washer 4-4 STD-859 Dowel 5-5
STD-294 Gasket 1-3 STD-860 Screw 4-7
STD-294 Gasket 1-18 STD-969 Screw 4-8
STD-303 Nut 4-3 STD-997 Dowel 5-7
STD-355 Plug 1-1 STD-1003 Dowel 1-1
STD-375 Screw 4-4 STD-1004 Ring 1-12
STD-394 Dowel 1-17 STD-1004 Ring 5-5
STD-405 Plug 1-1 STD-1006 Seal 4-5
STD-405 Plug 3-3 STD-1025 Key 5-7
STD-405 Plug 6-5 STD-1035 Nut 1-17
STD-475 Washer 1-7 STD-1045 Gasket 1-3
STD-475 Washer 1-12 STD-1066 Dowel 1-9
STD-475 Washer 1-15 STD-1102 Plug 4-3
STD-475 Washer 1-17 STD-1115 Bolt 6-3
STD-475 Washer 2-4 STD-1133 Dowel 5-7
STD-475 Washer 4-3 STD-1164 Insert 4-1
STD-475 Washer 4-7 STD-1173 Insert 1-1
STD-475 Washer 5-1 STD-1173 Insert 3-1
STD-475 Washer 5-5 STD-1204 Bolt 1-15
STD-475 Washer 6-4 STD-1204 Bolt 4-1
STD-477 Bolt 1-9 STD-1204 Bolt 4-5
STD-514 Dowel 4-1 STD-1215 Bolt 4-1
STD-514 Dowel 5-7 STD-1215 Bolt 5-7
STD-547 Seal 1-19 STD-1272 Gasket 3-1
STD-551 Plug 3-1 STD-1339 Plug 1-1
STD-557 Dowel 1-14 STD-1339 Plug 5-5
STD-589 Gasket 3-3 STD-1342 Spacer 1-17
STD-596 Nut 5-5 STD-1353 Insert 1-1
STD-596 Nut 6-3 STD-1409 Nut 3-1
STD-670 Nut 4-5 STD-1410 Nut 1-15
STD-670 Nut 4-7 STD-1410 Nut 1-12
STD-670 Nut 5-3 STD-1410 Nut 4-7
STD-670 Washer 6-1 STD-1410 Nut 5-1
STD-676 Washer 4-4 STD-1411 Nut 1-3
STD-678 Washer 1-5 STD-1411 Nut 1-5
STD-678 Washer 1-8 STD-1411 Nut 1-7
STD-678 Washer 5-5 STD-1411 Nut 2-2
STD-678 Washer 6-3 STD-1411 Nut 1-14
STD-679 Bolt 1-9 STD-1411 Nut 3-3
STD-696 Washer 1-19 STD-1411 Nut 4-1

7-2
AVCO LYCOMING TIGO-541 PARTS CATALOG
SECTION 7

NUMERICAL INDEX (CONT.)

PART NO. PARTNAME PAGENO. PARTNO. PART NAME PAGENO.

STD-1411 Nut 4-3 STD-1952 Bolt 3-3

STD-1411 Nut 4-5 STD-1955 Bolt 3-1
STD-1411 Nut 5-7 STD-1957 Bolt 4-4
STD-1412 Screw 2-4 STD-1959 Bolt 6-3
STD-1414 Bolt 1-7 STD-1968 Bolt 2-4
STD-1419 Bolt 1-7 STD-1968 Bolt 5-3
STD-1420 Nut 1-8 STD-1979 Bolt 1-7
STD-1421 Bolt 6-3 STD-1984 Dowel 1-1
STD-1499 Bolt 1-3 STD-1986 Insert 1-18
STD-1530 Clamp 2-4 STD-1989 Insert 3-3
STD-1575 Bolt 1-5 STD-1994 Bolt 1-5
STD-1575 Bolt 1-7 STD-1998 Bolt 6-5
STD-1650 Bolt 5-3 STD-2001 Bolt 3-1
STD-1685 Nut 2-4 STD-2003 Bolt 3-1
STD-1685 Nut 5-3 STD-2004 Bolt 3-1
STD-1688 Bolt 1-18 STD-2005 Bolt 3-1
STD-1688 Bolt 3-1 STD-2010 Bolt 6-3
STD-1688 Bolt 3-3 STD-2015 Bolt 1-7
STD-1727 Washer 4-3 STD-2027 Bolt 4-1
STD-1733 Ring 1-3 STD-2028 Bolt 4-1
STD-1737 Ring 1-13 STD-2035 Dowel 1-1
STD-1756 Washer 4-3 STD-2037 Bolt 1-5
STD-1774 Pin 1-1 STD-2039 Bolt 3-1
STD-1800 Ring 1-13 STD-2042 Bolt 4-1
STD-1828 Bolt 4-3 STD-2043 Nut 6-4
STD-1830 Bolt 1-7 STD-2044 Nut 6-7
STD-1838 Bolt 6-4 STD-2044 Nut 6-7
STD-1849 Insert 3-3 STD-2045 Nut 1-15
STD-1864 Nut 1-8 STD-2045 Nut 6-3
STD-1872 Insert 2-2 STD-2045 Nut 6-4
STD-1872 Insert 3-3 STD-2053 Bolt 1-5
STD-1875 Bolt 1-19 STD-2055 Bolt 1-5
STD-1875 Bolt 2-2 STD-2057 Key 1-17
STD-1875 Bolt 2-4 STD-2059 Screw 2-3
STD-1887 Bolt 3-1 STD-2068 Screw 5-5
STD-1887 Bolt 4-1 STD-2076 Key 1-11
STD-1896 Screw 4-1 STD-2081 Screw 5-3
STD-1896 Screw 4-3 STD-2084 Bolt 1-7
STD-1901 DriveStud 4-4 STD-2084 Bolt 1-18
STD-1925 Screw 2-2 STD-2090 Nut 1-7
STD-1932 Bushing 6-5 STD-2090 Nut 2-2
STD-1934 Seal 1-17 STD-2107 Bolt 1-5
STD-1940 Washer 1-7 STD-2111 Bolt 1-5
STD-1941 Pin 3-1 STD-2117 Clamp 1-15
STD-1943 Dowel 1-1 STD-2125 Nut 2-4
STD-1946 Bolt 6-1 STD-2128 Bolt 1-5
STD-1948 Bolt 1-7 STD-2128 Bolt 6-3
STD-1948 Bolt 1-18 STD-2134 Insert 4-1
STD-1951 Bolt 1-7 STD-2157 Bolt 6-4
STD-1952 Bolt 1-7 STD-2166 Elbow 4-5

7-3
AVCO LYCOMING TIGO-541 PARTS CATALOG
SECTION 7

NUMERICAL INDEX (CONT.)

PARTNO. PARTNAME PAGENO. PARTNO. PARTNAME PAGENO.

STD-2177 Bolt 6-7 383-B Nut 2-2

STD-2178 Washer 6-7 511 Spacer 1-15
10-4093 Washer 5-1 1028B Ball 1-3
10-32326 Spring 5-3 1102 Plug 1-1
10-78916 Bracket 5-3 1102 Plug 4-1
10-94225-2 Spring 5-3 1182K4 SparkPlug 5-3
10-89027-4 Bracket 5-3 1540 Plug 1-18
10-163011 Ferrule 5-3 8313 Gasket 1-15
10-163012 Eyelet 5-3 60009 Key 2-2
10-163151 Nut 5-1 60096 Gasket 4-4
10-320232 Clamp 5-3 60430 Cover 1-15
10-320297-2 Clamp 5-3 61261 Stud 1-1
10-320298-2 Clamp 5-3 61548 Plate 44
10-320298-3 Clamp 5-3 62254 Clip 4-5
10-320299-1 Clamp 5-3 65819 Bushing 2-1
10-320416-1 Clamp 5-3 66670 Bushing 2-2
10-320432-1 Clamp 5-3 66732 Gasket 2-2
10-320476-1 Clamp 5-3 67528 Stud 1-1
10-320573-3 Elbow 5-3 68437 Stud 1-1
10-320582 Sleeve 5-3 68510 Stud 1-1
10-320601 Ferrule 5-3 69208 Coupling 5-1
10-320602 Ferrule 5-3 69260-P10 Insert 2-2
10-349226 Grommet 5-3 69565 Sleeve 5-1
10-349661-2 Plate 5-3 69641 Dowel 1-9
10-620633-48 Lead 5-3 69943 Stud 1-1
10-620633-72 Lead 5-3 70310 Seal 2-2
10-90751-19 Pin 5-1 70455 Gasket 1-19
10-90788-5 Key 5-1 70457 Gasket 1-3
25C-8 Stud 2-2 70474 Washer 1-13
25C-9 Stud 1-1 71140 Fitting 3-1
25C-10 Stud 1-1 71481 Ring 2-2
25C-10 Stud 2-2 71549 Washer 2-3
25C-11 Stud 1-19 71610 Hook 2-4
25C-12 Stud 1-1 71611 Retainer 2-4
25C-12 Stud 5-7 71621 Clip 1-3
25C-18 Stud 1-1 71894 Seat 2-2
25CD-18 Stud 1-1 71903 Bushing 1-9
31-12 Stud 5-5 71906 Ring 1-9
31C-17 Stud 1-1 71907 Washer 1-9
31CD-20 Stud 1-1 71973 Gasket 4-1
38-13 Stud 1-1 72036 Clip 4-5
38-14 Stud 1-1 72053 Gasket 1-15
38-17 Stud 1-1 72075 Seal 1-8
38-18 Stud 1-1 72075 Seal 1-14
38-23 Stud 1-1 72078 Lockplate 1-9
38-25 Stud 1-1 72198 Plug 2-1
38-28 Stud 1-1 72217 Bearing 2-1
50-16 Stud 1-1 72377 Elbow 4-1
50-52 Stud 1-1 72377 Elbow 4-4
383-8 Nut 1-8 72378 Cover 1-15

7-4
AVCO LYCOMING TIGO-541 PARTS CATALOG
SECTION 7

NUMERICAL INDEX (CONT.)

PARTNO. PARTNAME PAGENO. PARTNO. PARTNAME PAGENO.

72540 Cover 1-15 75537 Shaft Gear 1-11

72626 Shaft 2-2 75538 Shaft 1-11
72706 Insert 2-2 75539 Adapter 5-5
72707 Eye 1-5 75546 Gear 1-11
72709 Screw 2-2 75553 Gear 1-11
72710 Cover 2-2 75557 Gear 1-11
72711 Ring 4-1 75562 Gear 1-11
72741 Gasket 1-15 75566 Coupling 5-7
73032 Gasket 4-3 75585 Gasket 3-1
73051 Pin 5-7 75618 Cap 1-11
73152 Bracket 5-3 75619 Shim 1-11
73314 Gasket 4-4 75631 Roller 1-9
73650 Clip 4-5 75637 Counterweight 1-9
73650 Clamp 4-7 75655 Washer 5-7
73772 Nozzle 1-1 75660 Spacer 4-1
73857 Ring 2-1 75670 CrankshaftAssy. 1-9
74070 Elbow 4-1 75688 Strap 1-5
74070 Elbow 4-4 75712 Stud 1-7
74117 Bracket 4-7 75713 Stud 1-7
74241 Ring 2-1 75714 Stud 1-7
74360 Flange 4-1 75739 Nipple 6-5
74494 Plate 2-3 75741 Pipe 4-1
74722 Gear 1-13 75742 Pipe 4-1
74755 Gear 1-13 75743 Pipe 4-1
74768 Gear 1-9 75744 Pipe 4-1
74769 Gear 1-9 75745 Pipe 4-1
74770 Lockplate 1-9 75746 Pipe 4-1
74876 Bushing 1-9 75747 Gear 1-13
74887 Spacer 2-2 75768 Support 4-3
74888 Stud 1-7 75771 Spacer 4-3
74906 Gasket 2-2 75782 Stud 1-7
74926 Washer 1-13 75791 Rod 4-3
74929 Washer 1-19 75795 Lever 4-3
74944 Gasket 4-3 75799 Stud 1-7
75087 Spring 4-5 75822 Spring 1-11
75145 Dowel 3-1 75843 Nut 1-12
75170 Bolt 1-7 75845 Gasket 6-5
75359 Dowel 1-9 75890 Gasket 4-5
75371 Gasket 6-1 75940 Tube 4-3
75395 Gear 1-12 75948 Tee 4-1
75462 Bushing 1-9 75955 Plug 4-1
75467 Coupling 5-1 75957 Ring 4-1
75473 ShaftGear 5-1 75965 Clamp 5-1
75500 GearAssy. 5-5 76036 Gasket 2-3
75508 Gear 1-13 76038 Cover 2-3
75510 Shaft 5-7 76077 Guide 2-2
75517 Bearing 1-9 76093 Seat 2-2
75519 Bearing 1-9 76180 RodAssy. 2-2
75521 Coupling 5-7 76181 Rod Assy. 2-2
75536 Bushing 5-5 76182 RodAssy. 2-2

7-5
AVCO LYCOMING TIGO-541 PARTS CATALOG
SECTION 7

NUMERICAL INDEX (CONT.)

PARTNO. PARTNAME PAGENO. PARTNO. PARTNAME PAGENO.
76183 Rod Assy. 2-2 77427 Pipe 6-7
76194 Shaft 4-3 77454 Slinger 1-11
76195 Support 4-3 77537 Adapter 44
76230 Bushing 1-17 77607 Sleeve 3-3
76240 Adapter 1-17 77622 Support 4-1
76242 Bushing 2-2 77623 Lug 4-1
76266 RockerAssy. 2-2 77644 Screen 3-1
76286 Seat 4-1 77645 Plug 3-1
76288 Spring 4-1 77646 Dowel 3-1
76291 Cover 4-1 77663 Bracket 1-5
76292 Valve 4-1 77664 Bracket 1-5
76399 Valve 4-1 77678 Bracket 1-5
76422 Elbow 4-7 77677 Bracket 1-5
76423 Baffle 2-2 77707 Gasket 1-17
76528 Gear 5-7 77741 Support 4-3
76539 Seat 3-3 77808 ValveAssy. 1-3
76541 Plug 3-3 77870 Shaft 5-7
76542 Spring 3-3 77898 Body 3-1
76546 Gasket 1-15 77900 Housing 5-7
76549 Adapter 3-3 77921 Tube 4-1
76557 Plug 2-4 77930 Adapter 6-7
76715 Nut 1-11 77941 Manifold 4-5
76734 Strap 2-6 77942 Manifold 4-5
76734 Strap 6-5 77987 Bearing 5-7
76815 Stud 5-7 78004 Pipe 6-7
76824 Shaft 3-1 78005 Pipe 6-7
76835 Bushing 5-7 78008 Pipe 6-7
76836 Washer 5-7 78011 Pipe 6-7
76842 Coupling 5-7 78012 Pipe 6-7
76869 Tube 4-7 78056 Gasket 6-7
76889 Adapter 6-1 78060 Relay 5-5
76925 Shaft 1-13 78067 Elbow 4-7
76964 Shaft 3-1 78083 Gasket 6-7
76967 Lockplate 1-13 78199 Bushing 1-19
76968 Bushing 1-9 78286 Pipe 6-7
76970 Impeller 3-1 78287 Pipe 6-7
76971 Impeller 3-1 78361 Bracket 1-3
76996 Shaft Gear 1-13 78370 Spacer 4-3
77001 Bushing 1-9 78447 Eye 1-5
77002 Counterweight 1-9 78488 Spacer 1-5
77004 Washer 1-9 78523 Elbow 4-7
77005 Ring 1-9 78585 Shaft 1-17
77007 Roller 1-9 78592 Lockplate 6-3
77015 GearAssy. 1-11 78692 Baffle 2-4
77016 Adapter 1-11 78780 Bracket 6-3
77067 Damper 6-3 78789 Plate 5-7
77156 Protector 5-3 78791 Starter 5-7
77217 Gear 1-13 78840 Support 6-3
77224 Plug 1-13 78844 Hose 1-15
77309 Bushing 1-13 78858 Adapter 4-3

7-6
AVCO LYCOMING TIGO-541 PARTS CATALOG
SECTION 7

NUMERICAL INDEX (CONT.)

PARTNO. PARTNAME PAGENO. PARTNO. PARTNAME PAGENO.
79046 Guide 2-2 LW-11138 Spring 1-3
LW-25H.75 Bolt 3-1 LW-11155 Sump 3-1
LW-31-1.09 Bolt 1-17 LW-11198 Element 3-3
LW-31-1.09 Bolt 4-3 LW-11256 Bushing 1-1
LW-10042 Connector 2-6 LW-11329 Gear 5-7
LW-10044 Tee 2-6 LW-11373 Hose 6-1
LW-10045 Elbow 2-6 LW-11446 Shield 4-3
LW-10066 Spacer 6-3 LW-11508 Fuel injector 4-3
LW-10076 Seat 2-2 LW-11515 Hose 5-7
LW-10077 Seat 2-2 LW-11576 Bearing 1-9
LW-10080 Gage 1-3 LW-11602 Lockplate 4-1
LW-10081 Gage 1-3 LW-11665 Button 2-3
LW-10089 Spacer 6-3 LW-11678 Shaft 1-19
LW-10090 Shim 6-3 LW-11679 Adapter 1-19
LW-10122 Gasket 6-1 LW-11738 Seal 1-11
LW-10123 Tube 1-11 LW-11739 Tube 1-11
LW-10179 Regulator 5-5 LW-11778 Washer 5-5
LW-10256 Alternator 5-5 LW-11780 Bushing 1-12
LW-10259 Adapter 5-5 LW-11781 Spacer 1-12
LW-10261 Adapter 5-5 LW-11784 Adapter 1-12
LW-10264 Gasket 5-5 LW-11798 Spring 2-2
LW-10375 Elbow 2-6 LW-11799 Spring 2-2
LW-10383 Ext. Assy. 1-3 LW-11838 Tube 4-7
LW-10385 Chain 1-3 LW-11873 Tube 1-15
LW-10391 CapAssy. 1-3 LW-11874 Breather 1-15
LW-10455 Gasket 1-19 LW-11886 Tube 1-3
LW-10516 Pulley 1-17 LW-11950 Controller 4-4
LW-10526 CapAssy. 1-3 LW-11952 Washer 1-12
LW-10539 Clamp 4-4 LW-11953 DriveAssy. 1-12
LW-10539 Clamp 6-1 LW-11954 Tube 6-1
LW-10545-S Piston 2-1 LW-11980 Nozzle 4-1
LW-10647 Dowel 1-1 LW-12085 Switch 5-7
LW-10727 Seal 1-12 LW-12088 Elbow 6-5
LW-10727 Seal 5-5 LW-12093-5 Coupling 6-7
LW-10734 Dowel 1-1 LW-12093-6 Coupling 6-5
LW-10738 Baffle 3-1 LW-12094 Hose 2-4
LW-10753 Shield 4-3 LW-12095 Hose 2-4
LW-10758 Tube 4-4 LW-12098-1-100 Tube 4-5
LW-10759 Valve 6-5 LW-12098-4-124 Tube 4-5
LW-10796 Lever 4-3 LW-12098-1-183 Tube 4-5
LW-10797 ControlShaft 4-3 LW-12098-1-200 Tube 4-5
LW-10799 Spacer 4-7 LW-12122 Seal 1-11
LW-10836 Strut 6-3 LW-12125-3 Coupling 6-5
LW-10937 Lifter 1-5 LW-12136 Cushion 5-1
LW-10937 Lifter 2-2 LW-12154 Hose 4-4
LW-10955 Belt 1-17 LW-12154 Hose 6-1
LW-11015 Stud 6-5 LW-12186 Nut 2-1
LW-11016 Transition 6-5 LW-12258 Housing 3-3
LW-11082 Valve 2-2 LW-12259 Plate 3-3
LW-11105 Lockplate 6-3 LW-12262 Bolt 3-3

7-7
AVCO LYCOMING TIGO-541 PARTS CATALOG
SECTION 7

NUMERICAL INDEX (CONT.)

PARTNO. PARTNAME PAGENO. PARTNO. PARTNAME PAGENO.

LW-12309 Rod 4-3 LW-13342 Housing 4-5

LW-12440 Camshaft 1-9 LW-13344 Plunger 4-5
LW-12515 Gasket 1-18 LW-13422 Rod 2-1
LW-12517 Gasket 3-3 LW-13429 Rod 4-3
LW-12518 Race 1-11 LW-13439 Cover 1-14
LW-12519 GearAssy. 1-11 LW-13440 Thrust Bearing 1-14
LW-12596 Bolt 2-1 LW-13441 Seat 1-14
LW-12681 Gasket 5-1 LW-13519 Shim 1-14
LW-12688 Seat 2-2 LW-13561 Cyl. Assy. 2-2
LW-12745 Valve 4-4 LW-13565 Spring 2-2
LW-12784-4-074 Hose 5-1 LW-13566 Adapter 2-2
LW-12784-4-110 Hose 5-1 LW-13615 Nozzle 1-1
LW-12798-4-222 Hose 2-6 LW-13649 Bracket 6-3
LW-12799-6-150 Hose 6-5 LW-13651 Bracket 6-3
LW-12799-6-222 Hose 6-5 LW-13652 Support 6-4
LW-12876-4-066 Hose 2-6 LW-13760 Sleeve 4-3
LW-12876-4-224 Hose 2-6 LW-13889 Housing 4-1
LW-12877-6-066 Hose 6-5 LW-13896 Plug 1-19
LW-12896 Seat 1-18 LW-13904 Kit 3-3
LW-13022 Valve 3-1 LW-13905 Filter 3-3
LW-13024 Pump 3-1 LW-13919 Pump 4-7
LW-13026 Cover 3-1 LW-13997-3 Key 2-2
LW-13027 Pipe 6-7 LW-13998-3 Cap 2-2
LW-13037 Tube 4-3 LW-14044 Washer 1-7
LW-13052 Plate 1-15 LW-14052 Crankcase Assy. 1-1
LW-13054 Manifold 6-7 LW 14054 Clamp 6-7
LW-13055 Manifold 6-7 LW-14074 Adapter 5-1
LW-13060 Blanket 6-1 LW-14078 Pin 2-1
LW-13081 Prop.Shaft 1-11 LW-14464 Coupling 5-5
LW-13087 Valve 2-2 LW-14472 Spring 5-5
LW-13134 Valve 5-1 LW-14525 Clamp 6-7
LW-13234 Turbocharger 6-1 LW-14572 Cable 6-7
LW-13235 Tee 6-5 LW-349290-2 Mag 5-1
LW-13247 Housing 1-18 LW-349310-4 Mag 5-1
LW-13321 Seat 2-2 LW-349490-1 Mag 5-1
LW-13230 ValveAssy. 1-18 LW-349510-1 Mag 5-1
LW-13335 Bearing 1-11 LW-349610-1 Mag 5-1
LW-13339 ShroudTube 2-2 LW-620580-1 Cable 5-3
LW-13340 Washer 2-2 LW-620580-11 Harness 5-1

7-8
AVCO LYCOMING TIGO-541 PARTS CATALOG
VENDOR ACCESSORY
STARTER 24V, PRESTOLITE
PRESTOLITE P/N - MHB-4005
AVCO LYCOMING P/N - 78791

QTY.
REF. PART DESCRIPTION PER MODEL
NO. NUMBER 12345 ENG. USAGE

MHB-4005 STARTER, 24 volt, Prestolite, Avco Lycoming

P/N 78791 1
1 MHB-2399 ARMATURE 1
2 MZ-24A BAND, Cover 1
X-3212 BEARING, Ball, sealed, commutator end 1
3 MHB-2418 FRAME AND FIELD ASSEMBLY 1
MHB-3005BS FIELD COIL PACKAGE 1
4 P90-878 TERMINAL STUD PACKAGE 1
5 MHB-2400A HEAD ASSEMBLY, Commutator end 1
6 MZ-19S SPRING SET, Brush 1
7 MHB-1030 HOUSING ASSEMBLY, Gear 1
XA-997 BEARING, Needle, 1/2 in. 1
8 XA-998 BEARING, Needle, 13/16 in. 1
P90-601 THRUST WASHER PACKAGE 1
9 MHB-2012AS BRUSH SET, Service 1

9 2

4
3

5 7

Figure 32. Starter, 24V, Prestolite

8-1
 AVCO LYCOMING TIGO-541 PARTS CATALOG
VENDOR ACCESSORY
ALTERNATOR 24V-100AMP PRESTOLITE
PRESTOLITE P/N - ALV-9401-L
AVCO LYCOMING P/N - LW-10256

QTY.
REF. PART DESCRIPTION PER MODEL
NO. NUMBER 12345 ENG. USAGE

ALV-9401-L ALTERNATOR, 24V, 100Amp, Prestolite, Avco

Lycoming P/N LW-10256 1
1 ALV-2006 ROTOR ASSEMBLY 1
2 ALV-1012S BRUSH SET, Service 1
3 ALV-1002S HEAD ASSEMBLY, Slip ring end 1
4 X-4087 BEARING, Ball, slip ring end 1
5 ALV-1003 HEAD ASSEMBLY, Drive end 1
6 X-4086 BEARING, Ball, sealed 1
7 ALV-2008 STATOR ASSEMBLY 1
8 ALV-1015 BRUSH HOLDER AND BRACKET 1
9 AMA-19S SPRING SET, Brush 1
10 ALV-1004 PLATE AND RECTIFIER ASSY., Positive 1
11 ALV-1004A PLATE AND RECTIFIER ASSY., Negative 1
12 GJT-47 COVER, Bearing, slip ring end 1
13 GR-32 RETAINER, Slip ring end 1
14 P90-2046 TERMINAL STUD AND PARTS PACKAGE 1
15 ALV-21 SPACER, Rotor shaft 1
16 8X-4075 NUT, Rotor shaft, hex, 5/8-32 1
17 XA-1104 SEAL, Oil 1
18 XA-744AZ SEAL, "O" ring 1
19 XA-744AB SEAL, "O" ring, bearing, 1-3/4 in. OD 1
20 MES-98S LOCK TAB PACKAGE (25 pieces) 1
21 P90-818 EYELET PACKAGE 1
22 ALB-20AS-1 THRU BOLT PACKAGE 1
23 VSF-7403S REGULATOR 1

4 13 11 10 21 7

I "

12 14 3 19 8 2 9 20 23 22 6 5 15 16
Figure 33. Alternator, 24V, 100Amp, Prestolite
8-2
AVCO LYCOMING TIGO-541 PARTS CATALOG
VENDOR ACCESSORY
MAGNETOS, BENDIX -1200 SERIES
BENDIX S6RN-1209 (RIGHT) 10-349310-4
BENDIX S6LN-1208 (LEFT) 10-349290-2
AVCO LYCOMING P/N's - LW-349310-4, LW-349290-2
QTY.
REF. PART DESCRIPTION PER MODEL
NO. NUMBFR 12345 ENG. USAGE

10-349310-4 MAGNETO, S6LN-1208, Bendix, Avco Lycoming

P/N LW-349290-2 1 A
10-349290-2 MAGNETO, S6RN-1209, Bendix, Avco Lycoming
P/N LW-349310-4 1 B
1 10-34937-24 SCREW, With lockwasher 1
2 10-92873-302 NUT 4
3 10-92873-302 NUT 1 B
4 10-90701-5 WASHER 8
5 10-349393-2 COVER, Magneto 1 A
5 10-349393-1 COVER, Magneto 1 B
6 10-125996 BUSHING, Retard lead securing screw 1 B
7 10-34937-12 SCREW, Retard lead securing 1 B
8 10-16092 WASHER, Retard lead securing screw 1 B
9 10-349269 LEAD, Retard 1 B
10 10-35935-6 SCREW, Capacitor securing 2
11 10-349276 CAPACITOR 1
12 10-349263 PACKING, Capacitor mounting 1
13 10-349221 STUD, Double end 4
14 10-78655 WASHER, Stud securing 4
15 10-92815-37 RING, Retaining (gear axle) 1
16 10-349511 WASHER, (Gear axle) 1
17 10-50752 WASHER, Felt (gear axle) 1
18 10-349212 BLOCK, Distributor (6 cyl.) 1
19 10-50737 SPRING, Helical 6
20 10-163374 STRIP, Felt 1
21 10-349237 GEAR ASSEMBLY, Large 1
22 10-160844 BRUSH, Carbon 1
23 10-35936-7 SCREW 2 A
23 10-35936-7 SCREW 4 B
24 10-14268 WASHER, Contact assembly securing screw 1 A
24 10-14268 WASHER, Contact assembly securing screw 2 B
25 10-382584 CONTACT ASSEMBLY, Left hand 1 A
25 10-382585 CONTACT ASSEMBLY, Right hand 1 B
26 10-35936-10 SCREW, Cam securing 1
27 10-51354 WASHER, Cam securing screw 1
28 10-349243-1 CAM 1
29 10-349326 STRIP, Fish paper 1
30 10-349219 WEDGE, (Coil) 2
31 10-349271 COIL, Magneto (high tension) 1
32 10-90751-19 PIN, Cotter 1
33 10-163151 NUT, Castellated 1
34 10-90788-5 KEY, Woodruff, drive shaft 1
35 10-4093 WASHER, Drive shaft nut 1
36 10-92815-62 RING, Retaining 1
37 10-349328 WASHER, Flat (flange) 1
38 10-349249 WASHER, Bowed (flange) 1
39 10-349248 SLINGER, Oil 1
40 10-349652 SCREW, (Flanged securing) 3
41 10-53397 WASHER, Flange securing screw 3
42 10-349392-2 FLANGE, Short round 1
43 10-353056 BEARING, Magneto drive end 1
44 10-349247 PLATE, Bearing retaining 1
45 10-349351-3 MAGNET, Rotating 1
46 10-349242 GEAR, Distributor (small) 1
47 10-157134 VENTILATOR 1
48 10-157135 PLUG, Timing 1
49 10-90500-8 SCREW 2
50 10-70616 PLATE, Identification 1

8-3
AVCO LYCOMING PARTS
TIGO-541 CATALOG
VENDOR ACCESSORY
MAGNETOS, BENDIX -1200 SERIES (CONT.)
BENDIX S6RN-1209 (RIGHT) 10-349310-4
BENDIX S6LN-1208 (LEFT) 10-349290-2
AVCO LYCOMING PIN's - LW-349310-4, LW-349290-2

QTY.
REF. PART DESCRIPTION PER MODEL
NO. NUMBER 12345 ENG. USAGE

51 10-353060 BEARING, Roller 1

52 10-349394-3 HOUSING, Magneto 1 A
52 10-349394-2 HOUSING, Magneto 1 B

9
1719 18 20 29 21 22

33 32

42
44 43 39 38 37 36
5 46 45

40
34

25 47
35

Figure 34. Magneto, 1200 Series, Bendix

8-4
AVCO LYCOMING TIGO-541 PARTS CATALOG
VENDOR ACCESSORY
FUEL INJECTOR, BENDIX RSA-10DB2
BENDIX P/N - 2524501-2
AVCO LYCOMING P/N - LW-11508

QTY.
REF. PART DESCRIPTION PER MODEL
NO. NUMBER 12345 ENG. USAGE

2524501-2 FUEL INJECTOR, Model RSA-1ODB2, Bendix,

Avco Lycoming P/N LW-11508 1
1 132906 PLUG,. Machine 1
2 951787 PACKING, Preformed 1
3 2523978 ADAPTER 1
4 951790 PACKING, Preformed 1
5 P61195 PLUG, Taper seat 1
6 393647 PLUG, Taper seat 2
7 383493 PLUG, Machine 1
8 365533 GASKET 1
9 2523976 ADAPTER 1
10 2523906 STRAINER ASSEMBLY 1
11 951790 PACKING, Preformed 1
12 2520387 SPRING, Helical, extension 1
13 901200 PIN, Cotter 1
14 911244 WASHER, Flat 1
15 P19821 WASHER, Spring 1
16 2522021 PIN, Straight, headed 1
17 901200 PIN, Cotter 1
18 911242 WASHER, Flat 1
19 177718 WASHER, Spring 1
20 2522022 PIN, Straight headed 1
21 367418 LINK 1
22 367547 SCREW ASSEMBLY, Adjusting 1
23 367544 LINK 1
24 367988 LEVER, Mixture control 1
25 187313 NUT, Self-locking 1
26 363083 SCREW, Machine 1
27 367962 SPACER 1
28 188595 WASHER, Flat 1
29 79216 SCREW, Machine 1
30 188595 WASHER, Flat 1
31 2523797 PLATE, Mixture control 1
32 2523840 BUSHING, Mixture control stem 1
33 338491 WASHER, "C" 1
34 367694 HOLDER, Spring 1
35 2523757 SPRING, Helical, compression 1
2523808 WASHER 1
36 909281K35 PIN, Spring 1
37 911255 WASHER, Flat 1
38 2523539 BUSHING 1
39 951401 PACKING, Preformed 1
40 951390 PACKING, Preformed 1
41 2522591 LEVER ASSEMBLY, Mixture control 1
42 2537648 LEVER ASSEMBLY, Idle valve (not illustrated) 1
43 79216 SCREW, Machine 2
44 911242 WASHER, Flat 2
45 P21818 SCREW, Machine 1
46 P22198 WASHER, Lock 1
47 909329 PIN, Spring 1
48 2522326 PLATE 1
49 2522327 BUSHING 1
50 367757 WASHER, Flat 1
51 951390 PACKING, Preformed 1
52 951400 PACKING, Preformed 1
53 2525197 VALVE, Mixture control 1
54 951400 PACKING, Preformed 1
55 2525494 PACKING, Preformed 1

8-5
AVCO LYCOMING TIGO-541 PARTS CATALOG
VENDOR ACCESSORY

23

22

51 48 49

Figure 35. Fuel Injector, Bendix, RSA-10DB2

8-6
AVCO LYCOMING TIGO-541 PARTS CATALOG
VENDOR ACCESSORY
FUEL INJECTOR, BENDIX RSA-10DB2 (CONT.)
BENDIX P/N - 2524501-2
AVCO LYCOMING P/N - LW-11508

QTY.
REF. PART DESCRIPTION PER MODEL
NO. NUMBER 12345 ENG. USAGE

56 2523981 VALVE, Lower idle 1

57 362842 SCREW, Cap, socket head 8
58 911242 WASHER, Flat 8
59 2525035 COVER, Regulator 1
60 2523794 NUT, Regulator stem 1
61 2523769 RETAINER, Regulator stem 1
62 2523687 SPRING, Helical compression 1
63 2523957 DIAPHRAGM ASSEMBLY, Air 1
64 2523688 SPRING, Helical compression 1
65 2526138 BODY ASSEMBLY, Regulator seal 1
66 2526090 BUSHING ASSEMBLY, Regulator seal 1
67 2525312 DIAPHRAGM ASSEMBLY, Fuel 1
68 2523770 VALVE ASSEMBLY, Regulator 1
69 2525547 SEAT ASSEMBLY, Regulator 1
70 P9201-75 METERING JET 1
71 319S354 BOLT, Machine 1
72 911244 WASHER. Flat 1
73 2523959 BOLT, Special 1
74 951390 PACKING, Preformed 2
75 2524366 CONTROL ASSEMBLY, Automatic mixture 1
76 2523910 VALVE, Throttle 1
77 393849 SCREW, Machine 2
78 901045 WASHER, Lock 2
79 P19261 LEVER, Throttle 1
80 900848K1 NUT, Castle 1
81 900452K1 SCREW, Idle adjusting 1
82 P60219 SPRING, Helical compression 1
83 2523800 STOP, Throttle 1
84 901209K1 PIN, Cotter 1
85 909329 PIN, Spring 1
86 367416 SHAFT ASSEMBLY. Throttle 1
87 909198K1 PIN, Spring 1
88 2537626 BODY ASSEMBLY, Main 1
89 2521918 BEARING 2
90 2529453 FITTING, Fuel inlet (not illustrated) 1
91 15937 NUT, Fuel inlet fitting (not illustrated) 1
92 367828 PLATE, Identification 1
93 186739 SCREW, Self-tapping 2

8-7
AVCO LYCOMING TIGO-541 PARTS CATALOG
VENDOR ACCESSORY

87

Figure 35. Fuel Injector, Bendix, RSA-10DB2

8-8
AVCO LYCOMING TIGO-541 PARTS CATALOG
VENDOR ACCESSORY

TURBOCHARGER, AIRESEARCH DIVISION T-18A21

AVCO LYCOMING P/N - LW-13234

QTY.
REF. PART DESCRIPTION PER MODEL
NO. NUMBER 12345 ENG. USAGE

407800-3 TURBOCHARGER ASSEMBLY, T-18A21, AiResearch,

Avco Lycoming P/N LW-13234 1
407813-10 CENTER HOUSING AND ROTATING ASSY. 1
1 407812-2 CENTER HOUSING ASSEMBLY 1
407809 CENTER HOUSING 1
2 407293-2 WHEEL ASSEMBLY 1
3 406687-3 SHROUD, Wheel 1
4 400408 RING, Retaining 3
5 407134 BEARING 2
6 407135 WASHER 2
7 402588 BEARING, Inboard thrust 1
8 406499-2 COLLAR, Thrust 1
9 406967-1 SPACER, Thrust 1
10 403818 RING, Piston 1
11 400424-1 "O" RING 1
12 407215-4 BACKPLATE ASSEMBLY 1
13 407339 PLATE, Lock 4
14 S100122 BOLT 4
15 407869-3 IMPELLER 1
16 400379 LOCKNUT, 3/8-24, NF-3 1
17 403818-13 RING, Piston 1
18 S456347 PIN, Spring 1
406385 BEARING, Outboard thrust 1
400438-1 DRIVE SCREW 3
19 408083-1 TURBINE HOUSING 1
20 407403 CLAMP 4
21 404223 LOCKPLATE 4
22 400132-301 BOLT, 5/16-18 8
23 407333-32 COMPRESSOR HOUSING 1
400500-925 COUPLING, "V" band 1
24 406886 NAMEPLATE 1
25 S173639 DRIVE SCREW, .073 x 1/4 in.long 4

8-9
AVCO LYCOMING TIGO-541 PARTS CATALOG
VENDOR ACCESSORY

16

20
21
22

7
9

13
14
10

19
4

Figure 36. T18A21 Turbocharger

8-10
AVCO LYCOMING TIGO-541 PARTS CATALOG
VENDOR ACCESSORY
EXHAUST BYPASS VALVE, AIRESEARCH DIVISION
AIRESEARCH P/N - 470818-5
AVCO LYCOMING P/N - LW-10759

QTY.
REF. PART DESCRIPTION PER MODEL
NO. NUMBER 12345 ENG. USAGE

470818-5 VALVE, Exhaust bypass, AiResearch,

Avco Lycoming P/N LW-10759 1
1 477379 SPRING 1
2 477378 SPRING 1
3 476770 RETAINER 1
4 476769 PISTON 1
5 476884-2 PACKING 1
6 476762 EXPANDER 1
7 476135 SCREW, Adjusting 1
8 400545-5 "O" RING 1
9 S125622 SCREW, Drive 4
10 476961 NAMEPLATE 1
11 476771-8 CYLINDER, Piston 1
12 400146-204 NUT 1
13 400140-200 LOCKWASHER 1
14 477240 VALVE HOUSING ASSEMBLY 1
15 400142-811 PIN, Flathead, 1/8 x 1/2 in. long
16 400138-45 WASHER 3
17 400143-95 PIN, Cotter
18 476887 SHIELD, Heat 1
19 476774 PLATE. Cylinder 1
20 400140-200 LOCKWASHER 4
21 S180024 BOLT, 1/4-20 x 1-1/4 in.long 4
22 476773 GASKET 1
23 477211 SHAFT 1
24 400140-200 LOCKWASHER 3
25 S180024 BOLT, 1/4-20 x 1-1/4 in. long
26 477358-1 TURNBUCKLE
27 400142-817 PIN
28 477359-1 CLEVIS 1
477413 DAMPER, Spring

8-11
AVCO LYCOMING TIGO-541 PARTS CATALOG
VENDOR ACCESSORY

13
4 10
11

6
3
2

19

16 22

27

24
25

Figure 37. Exhaust Bypass Valve

8-12
AVCO LYCOMING TIGO-541 PARTS CATALOG
VENDOR ACCESSORY
VARIABLE PRESSURE CONTROLLER, AIRESEARCH DIVISION
AIRESEARCH P/N - 470924-1
AVCO LYCOMING P/N - LW-11950

QTY.
REF. PART DESCRIPTION PER MODEL
NO. NUMBER 12345 ENG. USAGE

470924-2 CONTROLLER, Absolute pressure, variable

AiResearch, Avco Lycoming P/N LW-11950 1
1 S941577-7 SCREW, No. 10-32 x 1-1/2 in. long 1
2 S130246 SCREW, No. 10-24 x 5/8 in. long 4
3 400140-100 LOCKWASHER, No. 10 4
4 477003 BEARING, Needle 1
5 477441 BEARING CARRIER ASSEMBLY 1
6 477385 CAM 1
7 S941231-9 PIN, Spring, 5/64 in. dia. x 3/4 in. long 1
8 476909-2 BEARING, Cam 2
9 477001 BRACKET, Cam 1
10 400207-6 "O" RING 1
11 477377 SPRING 1
12 476999 RETAINER, Spring 1
13 477593 SEAT, Poppet 1
14 476648-1 POPPET 1
15 403069-29 "O" RING 1
16 477133 BELLOWS ASSEMBLY 1
17 476644 CONTROLLER HOUSING 1
18 403069-40 "O" RING 3
19 477123 BELLOWS ASSEMBLY 1
20 477398-1 SPRING 1
21 476677 RETAINER, Spring 1
22 S116120 LOCKWASHER, 5/16 1
23 400377-5 SCREW, No. 4-40 x .31 in. long 3
24 400386-304 NUT, 5/16-18 drilled 1
25 S125622 DRIVE SCREW, No. 0 x .19 in. long 4
26 476961 NAMEPLATE 1
27 476649 SPRING 1
28 477000 FOLLOWER, Cam 1
29 477387-3 SHAFT, Cam 1
30 477047 ARM, Cam 1
31 400521 NUT, Flexlock, No. 10-32 1
475204-10 SHIM, .010 thick (assemble between cam
bearing and cam bracket) un
477049 LINK, Clevis, cam 1
400365 PIN, Groove, (cam bearing to cam
bracket 1
477432 PIN, Stop adjustment, no. 10-32 x
.535 long 1
400520-3 SCREW, Set (Nylok) no. 10-32 x .188
in. long 1

8-13
AVCO LYCOMING TIGO-541 PARTS CATALOG
VENDOR ACCESSORY

23 22

24 21

20

19
18
25

16-15

14

13

10

28

29

5 4
30

Figure 38. Variable PressureController

8-14
 AVCO LYCOMING TIGO-541 PARTS CATALOG
SERVICE REPLACEMENT SET SECTION
Part No. Part Name

LW-11365 SEAL AND GASKET SET TIGO-541-E1A

Consisting of:

1 MS29513-015 Ring - Oil Seal

1 AN4047-1 Gasket - Accessory Drive
1 AN12400-1 Ring - Oil Seal
1 MS9241-035 Seal - Oil
1 MS16625-1081 Ring - Internal Retaining
1 MS28775-120 Ring - Oil Seal
1 MS28775-121 Ring - Oil Seal
1 MS28775-143 Seal - Oil
1 MS28775-147 Ring - Oil Seal
3 MS29512-6 Seal - Oil
1 MS29513-133 "O" Ring
2 STD-208 Seal - Oil
1 STD-213 Seal - Oil
1 STD-294 Gasket
1 STD-547 Seal
1 STD-589 Gasket - Copper Asbestos
2 STD-761 Pin - Cotter
2 STD-1004 Ring - Oil Seal
1 STD-1006 Seal - "O" Ring
1 STD-1045 Gasket
1 STD-1272 Gasket - Oil Suction Screen
1 STD-1737 Ring - Retaining
1 STD-1800 Ring - Retaining
1 STD-1934 Seal - Oil
3 8313 Gasket - Vacuum Pump
1 60096 Gasket - Fuel Pump
24 70310 Seal - Shroud Tube
12 66732 Gasket - Valve Rocker Shaft Cover
1 70455 Gasket
1 70457 Gasket - Oil Filler Extension
6 71481 Ring - Oil Seal
6 71973 Gasket
1 72053 Gasket - Governor
3 72075 Seal
2 72078 Lockplate
6 72711 Ring - Seal, Intake Pipe
1 72741 Gasket - Timing Pin Hole
1 73032 Gasket - Air Inlet Housing
1 73314 Gasket - Density Controller
6 74906 Gasket - Shroud Tube Adapter
1 74934 Gasket - Turbo Controller Adapter
1 75371 Gasket - Turbo Oil Inlet
75585 Gasket - Oil Sump
2 75845 Gasket - V-Band
1 75890 Gasket - Fuel Drain Check Valve
6 LW-11602 Lockplate - Fuel Injector Nozzle
1 75957 Ring - Oil Seal
6 76036 Gasket - Rocker Box Cover
I LW-12517 Gasket - Oil Filter Adapter
1 76546 Gasket - Propeller Control Access
1 76967 Lockplate
1 77707 Gasket - Crankcase Rear
I LW-12575 Gasket - Oil Cooler Bypass Housing
1 77996 Lockplate
12 78056 Gasket - Exhaust Flange
2 78083 Gasket - V-Band
2 LW-12681 Gasket - Magneto
1 78592 Lockplate
1 LW-10122 Gasket - Turbo Oil Drive Adapter
1 LW-10264 Gasket - Alternator Adapter

9-1
 AVCO LYCOMING TIGO-541 PARTS CATALOG
SERVICE REPLACEMENT SET SECTION
Part No. Part Name

LW-11365 SEAL AND GASKET SET (CONT.) TIGO-541-E1A

Consisting of:

1 LW-11738 Seal - "O" Ring

2 STD-1940 "O"-Ring
24 LW-11665 Thrust Button
6 LW-12081 Seal
1 LW-10455 Gasket - Tachometer Drive
1 LW-10727 Seal
2 LW-11105 Lockplate
6 75233 "O" Ring
1 LW-12122 Seal - Prop Shaft Oil

LW-14055 CYLINDER, PISTON AND RING ASSEMBLY TIGO-541-E1A

(Nitrided Cylinder Barrel, Chrome Plated Half-Wedge Rings)
Consisting of:

2 MS10997-3 Key - Valve (Rotator Type)

1 MS13998-3 Cap - Valve Stem
2 STD-160 Washer
2 STD-1215 Bolt
8 STD-2059 Screw - Self Locking
2 60009 Key Valve
4 70310 Seal - Shroud Tube
2 66732 Gasket - Valve Rocker Shaft Cover
1 LW-12321 Seat - Valve Spring Lower
1 LW-14078 Pin - Piston
1 71195 Box - Set Up
1 71481 Ring - Oil Seal, Cylinder Base
2 71549 Washer - Valve Rocker
2 72198 Plug - Piston Pin
2 72626 Shaft - Valve Rocker
1 72709 Screw .250-20 x .63 long
2 72710 Cover - Valve Rocker Shaft
1 73857 Ring - Piston Oil Regulating
2 74241 Ring - Compression
1 74906 Gasket - Shroud Tube Adapter
1 76036 Gasket - Rocker Box Cover
1 76038 Cover Assembly - Rocker Box
1 76093 Seat - Valve Spring Lower - Exhaust
2 76266 Rocker Assembly
2 LW-11798 Spring - Valve - Outer
2 LW-11799 Spring - Valve - Auxiliary
1 LW-13087 Valve - Intake (Hollow Stem)
1 LW-13561 Cylinder Assembly - Nitrided
1 LW-10076 Seat - Valve Spring (Rotator Type)
1 LW-10077 Seat - Valve Spring
1 LW-10545 Piston
1 LW-11082 Valve - Exhaust (Rotator Type)

LW-11500* COUPLING AND SHAFT ASSY., Starter Slip

Consisting of:

1 75510 Shaft
1 76842 Coupling
1 STD-1025 Key - Woodruff

* - This kit is supplied for customer convenience due to difficulty of assembly in the field.

9-2
AVCO LYCOMING TIGO-541 PARTS CATALOG
SECTION 10
PARTS SUPERSEDURES
SECTION 1
Part No. Superseded
by Name Remarks

Reference
Page1-1

LW-10768 LW-11737 Crankcase

Assy. Usenewerprop oil supplytube and"o"-ring.

LW-11737 LW-11993 Crankcase

Assy. Change
to straightmain bearingdowels.

LW-11993 LW-13082 Crankcase

Assy. Employsstainlesssteelthrust bearing.

LW-13082 LW-13442 Crankcase

Assy. Change
in prop shaftdrivegearbearings.

LW-13442 LW-14052 Crankcase

Assy. Uses38-13 studfor newturbo mountingbracket.

Thereareno supersedures
on Pages1-3, 1-5, 1-7.

Reference
Page1-9

74303 LW-11575 Bearing,Crankshaft Change

to straightmainbearingdowels.

LW-10068 LW-12440 CamshaftAssy. Incorporatecarbureizedoil pumpdogs.

Reference
Page1-11

75750 LW-12365 PropShaft andGearAssy. Usesinboardsealfor prop.flangebearing.

LW-12365 LW-12477 PropShaft andGearAssy. Usesgrease

packedpropshaft thrust bearing.

LW-12477 LW-13081 PropShaft andGearAssy. To incorporatestainlesssteelthrust bearinginsteadof

greasepacked.

75621 LW-12519 GearAssy.,PropShaft UsesLW-12518racewhen removingtorquemeterandinstalling

Drive needlethrust bearing.

76441 LW-12518 Race,NeedleThrust Bearing Replacesadapterwhen removingtorquemeterandinstalling

needlethrust bearing.

75502 LW-11737 Tube,PropOil Supply Employs"o"-ring to eliminateoil leakage.

Reference
Page1-12

LW-10422 LW-11785 StarterDriveAssy. Employswashers

to obtainbacklash.

LW-11785 LW-11953 StarterDriveAssy. Incorporatesimprovedshaftgearin assembly.

75527 LW-12241 Shaftgear,

StarterDrive Newer,hardershaft assemblyincorporatedin LW-11953
starterdrive assembly.

Thereareno supersedures
on Page1-13.

Reference
Page1-14

76905 LW-13440 Bearing,

Thrust Needle Incorporateslargerollers.

77299 LW-13441 Seat,Thrust Bearing Usedwith LW-13440bearing.

LW-12451 LW-13439 CoverAssy. Usedwith LW-13440bearing.

75607 LW-13519 Shim Usedwith LW-13440bearing.

Thereareno supersedures
on Page1-15

10-1
AVCO LYCO I I\ TIGO-541 PARTS CATALOG
SECTION 10
PARTS SUPERSEDURES

SECTION 1 (CONT.)

PartNo. Supersededby Name Remarks

Reference
Page
1-17
77517 78585 Shaft Product
improvement.

MS21261R505 STD-2057 Key Eliminate

interference
with matingpart.

STD-61 STD-1035 Nut Productimprovement.

77568 LW-10516 Pulley Productimprovement.
Reference
Page1-18
77854 LW-12515 Gasket Newsymetrical
gasket.
LW-11984 LW-13247 Housing
Assy. Incorporate
largeseatfor oil coolerbypass
valve.

76509 LW-12896 Seat Usedwith LW-13230

bypass
valve.
75944 LW-13230 Valve,OilCoolerByp_ Change
to largevalveseat.
Reference
Page1-19
78200 LW-11678 Tach.ShaftAssy. Newassy.for improved
lubrication.

78201 LW-11679 AdapterAssy. Newadapter

drilledfor improved
lubrication.

SECTION 2
Reference
Page
2-1

77450 LW-13422 Connecting

RodAssy. Uses
improved
boltLW-12596.

75060 LW-12596 Bolt Strengthened

rod bolt.
LW-13444 LW-14078 Pin,Piston to providepositiveidentification.
Change

Reference
Page
2-2
LW-11607 LW-13263 CylinderAssy. To incorporate
smallintakevalves.

LW-12216 LW-13263 CylinderAssy. To incorporate

smallintakevalves.
LW-13263 LW-13561 CylinderAssy. Coilspringretentionshroudtube.
72212 LW-12688 Seat,IntakeValve Smallintakevalve.
75838 LW-11958 Guide,Exhaust
Valve Flangeless
for angleheadcylinder.
66713 LW-11956 Guide,ValveIntake Flangeless
for angleheadcylinder.

68326 LW-11796 Spring,Valve,Outer Retains

pressure
better.
68327 LW-10077 Seat,ValveSpring Newmaterial.

68328 LW-11797 Spring,ValveAuxiliary Retaintension.

68325 LW-13321 Seat,ValveSpring Provides

clearance
withguide.

73115 LW-10076 Seat,ValveSpring Newmaterial.

76347 LW-13087 Valve,Intake valve.
Smalldiameter

76351 LW-11798 Spring,ValveOuter better.

tension
Retains

10-2
AVCO LYCOMIN IG TIGO-541 PARTS CATALOG
SECTION 10
PARTS SUPERSEDURES
SECTION 2 (CONT.)
Part No. Superseded
by Name Remarks

Page2-2 (Cont.)
Reference

76352 LW-11799 Spring,ValveAuxiliary Retainstensionbetter.

76278 LW-13339 ShroudTube Assy. To preventoil leakage.

LW-13077 LW-13565 Spring,ShroudTube Newcoil spring.

62922 70310 Seal,ShroudTube For new shroudtube.

66728 LW-13340 Washer For newshroudtube.

77755 LW-13566 AdapterShroudTube For new LW-13561cylinder.

Reference
Page2-4

76175 78692 BaffleAssy.,Intercylinder Productimprovement.

Reference Page 2-6

79039 LW-10042 Connector Productimprovement.

72376 LW-10045 Elbow Productimprovement.

75948 LW-10044 Tee Productimprovement.

LW-10038 LW-12876-4-066 HoseAssy. Teflon.

74543 LW-12876-4-224 HoseAssy. Teflon.

76517 LW-12798-4-204 HoseAssy. Teflon.

SECTION 3
Reference
Page3-1

77899 LW-13024 Oil PumpAssy. Userelief valvein coverassembly.

Reference
Page3-3

LW-12263 LW-12262 Bolt Assy.,Oil Filter Eliminatefailure at roll pin

Housing

76531 LW-12517 Gasket Prevents

oil holerestriction.

76538 77607 Oil ReliefValveSleeve Productimprovement.

76550 LW-12258 HousingAssy. Eliminatesoil leakage.

76650 LW-11198 Element Productimprovement.

77296 LW-12262 Bolt, Oil Filter Housing Eliminatesfailure at roll pin.

10-3
AVCO LYCOMING TIGO-541 PARTS CATALOG
SECTION 10
PARTS SUPERSEDURES

SECTION 4

Reference
Page4-1

77539 LW-11980 NozzleAssy. Productimprovement.

75954 LW-11602 Lockplate Eliminatesloosenozzles.

Reference
Page4-3

LW-10989 LW-13429 Control Rod End Eliminatesthrottle linkageseizure.

LW-10990 LW-13429 ControlRod End Eliminatesthrottle linkageseizure.

Reference
Page4-5

75068 LW-13344 Plunger To provideimprovedfuel draincheckvalveseal.

75909 LW-13342 HousingAssy. To provideimprovedfuel draincheckvalveseal.

Reference
Page4-7

LW-12321 LW-13919 Fuel PumpAssy. To stabilizeidle RPMfuel pressure.

SECTION 5

PartNo. Superseded
by Name Remarks

Reference
Page5-1

68874 LW-12136 Cushion,MagnetoDrive For improvedstartingwith impulsemagnetos.

on Page5-3.
Thereareno supersedures

Reference
Page5-5

77858 LW-14464 CouplingAssy.Alt. Drive Providesfor springinstallation.

on Page5-7.
Thereareno supersedures

SECTION 6
Reference
Page6-1

LW-11976 LW-13234 Turbocharger Employsoil squirt.

LW-10191 LW-11976 Turbocharger stainlesssteelturbine housing.

Incorporates

78349 LW-13060 Blanket steelturbine housing.

Usedwith stainless

74990 LW-12154 Hose Beadedhoseto preventclampslippage.

Reference
Page6-3

LW-10063 LW-13649 Turbo and Compressor Providecommonmountingbracketfor turbo andcompressor.

Bracket

LW-11080 LW-13651 Bracket,Turbocharger Usedwith LW-13649bracket.

Reference
Page6-5

75606 LW-12093-6 Coupling Productimprovement.

LW-11018 LW-12125-3 Coupling Productimprovement.

Thereareno supersedures
on Page6-7.

10-4