Marine

Propulsion 3306B
Engine
160 bkW (215 bhp) 218 mhp @ 2000 rpm

SPECIFICATIONS
I-6, 4-Stroke-Cycle-Diesel
Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . IMO compliant
Displacement . . . . . . . . . . . . . . . . . . . . 10.5 L (641 cu. in.)
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 mm (4.8 in.)
Stroke. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 mm (6.0 in.)
Aspiration . . . . . . . . . . . . . . . . Turbocharged-Aftercooled
Governor . . . . . . . . . . . . . . . . . . . . . . . . Hydra-mechanical
Engine Weight, Net Dry (approx) . . 1120.9 kg (2469 lb)
Capacity for Liquids
Cooling System . . . . . . . . . . . . . . . 18.2 L (4.8 U.S. gal)
Lube Oil System (refill) . . . . . . . . 27.4 L (7.2 U.S. gal)
Oil Change Interval . . . . . . . . . . . . . . . . . . . . . . . . . . 250 hr
Shown with Caterpillar DEO 10W30 or 15W40
Accessory Equipment
Rotation (from flywheel end) . . . . . . . Counterclockwise

STANDARD EQUIPMENT ACCESSORY EQUIPMENT

Air Inlet System Air Cleaner Rain Cap
Dry, regular duty air cleaner Air Starting Motor
Cooling System 12V 51 Amp, 24V 35 Amp, 24V 60 Amp Alternator
Gear driven centrifugal jacket water pump, engine
Auxiliary Drive Pulley
oil cooler, expansion tank, thermostats and
housing, transmission oil cooler Digital Tachometer
Exhaust System Double Wall Fuel Lines and Drain
Watercooled manifold and turbocharger; dry elbow Duplex Fuel Filter
and flange, 152 mm (6 in.)
Electric Overspeed Shutoff
Flywheel and Flywheel Housing
Electric Starting Motor
SAE No. 1 (156 teeth)
Engine-Mounted Instrument Panel
Fuel System
Ether Starting Air
Fuel priming pump, fuel transfer pump, fuel filter,
flexible fuel lines Exhaust Elbow, Pipe, Rain Cap, Flexible Fittings
Instruments Front Enclosed Clutch
Fuel pressure gauge, service meter, heavy-duty Fuel Ratio Control
standard SAE rotation tachometer drive
Hydraulic Pump Drive
Lube System
Magnetic Pickup
Top-mounted crankcase breather, oil filter, LH oil
filler and oil level gauge, oil pan Manual Shutoff Lever
Mounting System Manual Sump Pump
Front support Pilot House Instrument Panel
General Primary Fuel Filter/Water Separator
Vibration damper and guard, Caterpillar yellow Remote-Mounted Pilot House Controls
paint, lifting eyes
Remote Positive Locking Governor Control
RH Oil Level Gauge
Shutoff Solenoid ETR
Spare Parts Kit
 3306B MARINE PROPULSION 160 bkW (215 bhp)

PERFORMANCE CURVES
A Rating DM6061-00 IMO Compliant
Engine Power

Engine Power
300 300
225 225
kW

hp
150 150
75 75

1200 800
Torque

Torque
800 500
Nm

lb ft
400 200
0 -100

250 .411
g/kW-hr

lb/hp-hr
243 .399
BSFC

BSFC
235 .387
228 .375

1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100

Engine Speed - rpm Engine Speed - rpm

Maximum Power Maximum Power

Metric Prop Demand 160 kW English Prop Demand 215 hp

Performance Data Performance Data

Engine Engine Engine Fuel Engine Engine Engine Fuel

Speed Power Torque BSFC Rate Speed Power Torque BSFC Rate
rpm kW Nm g/kW-hr L/hr rpm hp lb ft lb/hp-hr gph
Maximum Maximum
Power 2000 160 764 230.0 43.9 Power 2000 215 563 .378 11.6
Data 1900 155 777 229.0 42.1 Data 1900 207 573 .376 11.1
1800 148 783 229.0 40.2 1800 198 577 .376 10.6
1700 141 794 229.0 38.6 1700 190 586 .376 10.2
1600 134 802 230.0 36.9 1600 180 591 .378 9.7
1500 126 802 232.0 34.9 1500 169 591 .381 9.2
1400 118 802 236.0 33.0 1400 158 591 .388 8.7
1300 111 815 242.0 32.0 1300 149 601 .398 8.5
1200 108 859 250.0 32.2 1200 145 634 .411 8.5
Prop Prop
Demand 2000 160 764 230.0 43.9 Demand 2000 215 563 .378 11.6
Data 1900 137 689 229.0 37.5 Data 1900 184 508 .376 9.9
1800 117 619 229.0 31.8 1800 156 457 .376 8.4
1700 98 552 228.0 26.8 1700 132 407 .375 7.1
1600 82 489 229.0 22.3 1600 110 361 .376 5.9
1500 68 430 230.0 18.5 1500 91 317 .378 4.9
1400 55 374 233.0 15.3 1400 74 276 .383 4.0
1300 44 323 239.0 12.5 1300 59 238 .393 3.3
1200 35 275 247.0 10.2 1200 46 203 .406 2.7

Cubic prop demand curve with 3.0 exponent for displacement Power produced at the flywheel will be within standard
hulls only. tolerances up to 50C (122F) combustion air temperature
measured at the air cleaner inlet, and fuel temperature
up to 52C (125F) measured at the fuel filter base.
Power rated in accordance with NMMA procedure as
crankshaft power. Reduce crankshaft power by 3% for
propeller shaft power.

PD-DM6061-00.pdf Created on 06/19/2001 11:49 2001 Caterpillar All Rights Reserved

3306B MARINE PROPULSION 160 bkW (215 bhp)
Right Side Front Footprint

03
03

03
H

01 01 01 01

L W

03
03

03
DIMENSIONS
mm in.
Overall Length 1719.2 67.7
Length from rear face of block to front of engine 1285.0 50.6
Length from rear face of block to back of flywheel housing 149.8 5.9
Overall Height 1141.0 44.9
Height from crankshaft centerline to top of engine 827.7 32.6
Height from crankshaft centerline to bottom of oil pan 313.3 12.3
Overall Width 951.1 37.4
Width from crankshaft centerline to port side (left side) 372.0 14.7
Width from crankshaft centerline to starboard side 542.8 21.4
(right side)
Front
mm in.
Customer mounting hole diameter 19.8 0.8
Width from crankshaft centerline to mounting holes 307.8 12.1
Length from rear face of block to mounting holes 935.7 36.8
1018.3 40.1
*Illustrations and dimensions from drawing: 188-1628

RATING DEFINITIONS AND CONDITIONS

A Rating Engine Performance Parameters
Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +3%
Typical Application . . . For heavy-duty service
Specific Fuel Consumption . . . . . . . . . . . . . . . +3%
in vessels such as freighters, tugboats, bottom
Fuel Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5%
drag trawlers, and deep river towboats where
the engine is operated at rated load and speed Ratings are based on SAE J1228/ISO8665
up to 100% of the time without interruption or standard conditions of 100 kPa (29.61 in. Hg),
load cycling. 25C (77F), and 30% relative humidity. These
Typical Hours Per Year . . . . . . . . . . . 5000 to 8000 ratings also apply at ISO3046/1, DIN6271/3, and
Time at Rated Speed. . . . . . . . . . . . . . . Up to 100% BS5514 conditions of 100 kPa (29.61 in. Hg),
27C (81F), and 60% relative humidity.
Load Factor . . . . . . . . . . . . . . . . . . . . . . . 80 to 100%
Typical Time at Full Load . . . . . . . . . . . . . No limit Fuel rates are based on fuel oil of 35 API
[16C (60F)] gravity having an LHV of
42 780 kJ/kg (18,390 Btu/lb) when used at 29C
(85F) and weighing 838.9 g/L (7.001 lb/U.S. gal).
Additional ratings may be available for specific
customer requirements. Consult your Caterpillar
representative for additional information.
 3306B MARINE PROPULSION 160 bkW (215 bhp)

Performance data is calculated in accordance with tolerances and conditions stated in this specification sheet and is only intended for purposes of
comparison with other manufacturers engines. Actual engine performance may vary according to the particular application of the engine and
operating conditions beyond Caterpillars control.
TMI Reference No.: DM6061-00 (6-19-01)
Materials and specifications are subject to change without notice. The International System of Units (SI) is used in this publication.
LEHM1242-00 (6-01) Printed in U.S.A. 2001 Caterpillar
Supersedes LEHM7240-01 All rights reserved.
 Marine
Propulsion 3306B
Engine
175 bkW (235 bhp) 238 mhp @ 2000 rpm

SPECIFICATIONS
I-6, 4-Stroke-Cycle-Diesel
Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . IMO compliant
Displacement . . . . . . . . . . . . . . . . . . . . 10.5 L (641 cu. in.)
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 mm (4.8 in.)
Stroke. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 mm (6.0 in.)
Aspiration . . . . . . . . . . . . . . . . Turbocharged-Aftercooled
Governor . . . . . . . . . . . . . . . . . . . . . . . . Hydra-mechanical
Engine Weight, Net Dry (approx) . . 1120.9 kg (2469 lb)
Capacity for Liquids
Cooling System . . . . . . . . . . . . . . . 18.2 L (4.8 U.S. gal)
Lube Oil System (refill) . . . . . . . . 27.4 L (7.2 U.S. gal)
Oil Change Interval . . . . . . . . . . . . . . . . . . . . . . . . . . 250 hr
Caterpillar DEO 10W30 or 15W40
Shown with
Accessory Equipment Rotation (from flywheel end) . . . . . . . Counterclockwise

STANDARD EQUIPMENT ACCESSORY EQUIPMENT

Air Inlet System Air Cleaner Rain Cap
Dry, regular duty air cleaner Air Starting Motor
Cooling System 12V 51 Amp, 24V 35 Amp, 24V 60 Amp Alternator
Gear driven centrifugal jacket water pump, engine
Auxiliary Drive Pulley
oil cooler, expansion tank, thermostats and
housing, transmission oil cooler Digital Tachometer
Exhaust System Double Wall Fuel Lines and Drain
Watercooled manifold and turbocharger; dry elbow Duplex Fuel Filter
and flange, 152 mm (6 in.)
Electric Overspeed Shutoff
Flywheel and Flywheel Housing
Electric Starting Motor
SAE No. 1 (156 teeth)
Engine-Mounted Instrument Panel
Fuel System
Ether Starting Air
Fuel priming pump, fuel transfer pump, fuel filter,
flexible fuel lines Exhaust Elbow, Pipe, Rain Cap, Flexible Fittings
Instruments Front Enclosed Clutch
Fuel pressure gauge, service meter, heavy-duty Fuel Ratio Control
standard SAE rotation tachometer drive
Hydraulic Pump Drive
Lube System
Magnetic Pickup
Top-mounted crankcase breather, oil filter, LH oil
filler and oil level gauge, oil pan Manual Shutoff Lever
Mounting System Manual Sump Pump
Front support Pilot House Instrument Panel
General Primary Fuel Filter/Water Separator
Vibration damper and guard, Caterpillar yellow Remote-Mounted Pilot House Controls
paint, lifting eyes
Remote Positive Locking Governor Control
RH Oil Level Gauge
Shutoff Solenoid ETR
Spare Parts Kit
 3306B MARINE PROPULSION 175 bkW (235 bhp)

PERFORMANCE CURVES
B Rating DM6060-00 IMO Compliant
Engine Power

Engine Power
300 300
225 225
kW

hp
150 150
75 75

1300 900
Torque

Torque
900 600
Nm

lb ft
500 300
100 0

259 .426
248 .408
g/kW-hr

lb/hp-hr
BSFC

BSFC
238 .390
227 .372

1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100

Engine Speed - rpm Engine Speed - rpm

Maximum Power Maximum Power

Metric Prop Demand 175 kW English Prop Demand 235 hp

Performance Data Performance Data

Engine Engine Engine Fuel Engine Engine Engine Fuel

Speed Power Torque BSFC Rate Speed Power Torque BSFC Rate
rpm kW Nm g/kW-hr L/hr rpm hp lb ft lb/hp-hr gph
Maximum Maximum
Power 2000 175 836 231.0 48.2 Power 2000 235 617 .380 12.7
Data 1900 172 866 230.0 47.2 Data 1900 231 639 .378 12.5
1800 167 887 230.0 45.8 1800 224 654 .378 12.1
1700 160 901 231.0 44.2 1700 215 665 .380 11.7
1600 153 913 233.0 42.6 1600 205 673 .383 11.3
1500 146 927 237.0 41.1 1500 195 684 .390 10.9
1400 138 941 242.0 39.8 1400 185 694 .398 10.5
1300 129 950 249.0 38.4 1300 173 701 .409 10.1
1200 120 956 259.0 37.0 1200 161 705 .426 9.8
Prop Prop
Demand 2000 175 836 231.0 48.2 Demand 2000 235 617 .380 12.7
Data 1900 150 754 229.0 41.0 Data 1900 201 556 .376 10.8
1800 128 677 228.0 34.7 1800 171 499 .375 9.2
1700 108 604 228.0 29.2 1700 144 445 .375 7.7
1600 90 535 227.0 24.3 1600 120 395 .373 6.4
1500 74 470 228.0 20.0 1500 99 347 .375 5.3
1400 60 409 230.0 16.5 1400 80 302 .378 4.4
1300 48 353 235.0 13.5 1300 65 260 .386 3.6
1200 38 301 242.0 10.9 1200 51 222 .398 2.9

Cubic prop demand curve with 3.0 exponent for displacement Power produced at the flywheel will be within standard
hulls only. tolerances up to 50C (122F) combustion air temperature
measured at the air cleaner inlet, and fuel temperature
up to 52C (125F) measured at the fuel filter base.
Power rated in accordance with NMMA procedure as
crankshaft power. Reduce crankshaft power by 3% for
propeller shaft power.

PD-DM6060-00.pdf Created on 06/19/2001 11:49 2001 Caterpillar All Rights Reserved

3306B MARINE PROPULSION 175 bkW (235 bhp)
Right Side Front Footprint

03
03

03
H

01 01 01 01

L W

03
03

03
DIMENSIONS
mm in.
Overall Length 1719.2 67.7
Length from rear face of block to front of engine 1285.0 50.6
Length from rear face of block to back of flywheel housing 149.8 5.9
Overall Height 1141.0 44.9
Height from crankshaft centerline to top of engine 827.7 32.6
Height from crankshaft centerline to bottom of oil pan 313.3 12.3
Overall Width 951.1 37.4
Width from crankshaft centerline to port side (left side) 372.0 14.7
Width from crankshaft centerline to starboard side 542.8 21.4
(right side)
Front
mm in.
Customer mounting hole diameter 19.8 0.8
Width from crankshaft centerline to mounting holes 307.8 12.1
Length from rear face of block to mounting holes 935.7 36.8
1018.3 40.1
*Illustrations and dimensions from drawing: 188-1628

RATING DEFINITIONS AND CONDITIONS

B Rating Engine Performance Parameters
Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +3%
Typical Application . . . Vessels such as
Specific Fuel Consumption . . . . . . . . . . . . . . . +3%
midwater trawlers, purse seiners, crew and
Fuel Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5%
supply boats, ferries, and towboats where locks,
sandbars, and curves dictate frequent slowing, Ratings are based on SAE J1228/ISO8665
and engine load and speed are constant with standard conditions of 100 kPa (29.61 in. Hg),
some cycling. 25C (77F), and 30% relative humidity. These
Typical Hours Per Year . . . . . . . . . . . 3000 to 5000 ratings also apply at ISO3046/1, DIN6271/3, and
Time at Rated Speed . . . . . . . . . . . . . . . . Up to 80% BS5514 conditions of 100 kPa (29.61 in. Hg),
27C (81F), and 60% relative humidity.
Load Factor . . . . . . . . . . . . . . . . . . . . . . . . 40 to 80%
Typical Time at Full Load . . . . 10 out of 12 hours Fuel rates are based on fuel oil of 35 API
[16C (60F)] gravity having an LHV of
Rated Speed . . . . . . . . . . . . . . . . . . . . . . . . 2000 rpm 42 780 kJ/kg (18,390 Btu/lb) when used at 29C
Maximum Cruise Speed. . . . . . . . . . . . . . . 1900 rpm (85F) and weighing 838.9 g/L (7.001 lb/U.S. gal).
Maximum Continuous Cruise Speed. . . . 1800 rpm
Additional ratings may be available for specific
customer requirements. Consult your Caterpillar
representative for additional information.
 3306B MARINE PROPULSION 175 bkW (235 bhp)

Performance data is calculated in accordance with tolerances and conditions stated in this specification sheet and is only intended for purposes of
comparison with other manufacturers engines. Actual engine performance may vary according to the particular application of the engine and
operating conditions beyond Caterpillars control.
TMI Reference No.: DM6060-00 (6-19-01)
Materials and specifications are subject to change without notice. The International System of Units (SI) is used in this publication.
LEHM1241-00 (6-01) Printed in U.S.A. 2001 Caterpillar
Supersedes LEHM7240-01 All rights reserved.
 Marine
Propulsion 3306B
Engine
201 bkW (270 bhp) 274 mhp @ 2200 rpm

SPECIFICATIONS
I-6, 4-Stroke-Cycle-Diesel
Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . IMO compliant
Displacement . . . . . . . . . . . . . . . . . . . . 10.5 L (641 cu. in.)
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 mm (4.8 in.)
Stroke. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 mm (6.0 in.)
Aspiration . . . . . . . . . . . . . . . . Turbocharged-Aftercooled
Governor . . . . . . . . . . . . . . . . . . . . . . . . Hydra-mechanical
Engine Weight, Net Dry (approx) . . 1120.9 kg (2469 lb)
Capacity for Liquids
Cooling System . . . . . . . . . . . . . . . 18.2 L (4.8 U.S. gal)
Lube Oil System (refill) . . . . . . . . 27.4 L (7.2 U.S. gal)
Oil Change Interval . . . . . . . . . . . . . . . . . . . . . . . . . . 250 hr
Caterpillar DEO 10W30 or 15W40
Shown with
Accessory Equipment Rotation (from flywheel end) . . . . . . . Counterclockwise

STANDARD EQUIPMENT ACCESSORY EQUIPMENT

Air Inlet System Air Cleaner Rain Cap
Dry, regular duty air cleaner Air Starting Motor
Cooling System 12V 51 Amp, 24V 35 Amp, 24V 60 Amp Alternator
Gear driven centrifugal jacket water pump, engine
Auxiliary Drive Pulley
oil cooler, expansion tank, thermostats and
housing, transmission oil cooler Digital Tachometer
Exhaust System Double Wall Fuel Lines and Drain
Watercooled manifold and turbocharger; dry elbow Duplex Fuel Filter
and flange, 152 mm (6 in.)
Electric Overspeed Shutoff
Flywheel and Flywheel Housing
Electric Starting Motor
SAE No. 1 (156 teeth)
Engine-Mounted Instrument Panel
Fuel System
Ether Starting Air
Fuel priming pump, fuel transfer pump, fuel filter,
flexible fuel lines Exhaust Elbow, Pipe, Rain Cap, Flexible Fittings
Instruments Front Enclosed Clutch
Fuel pressure gauge, service meter, heavy-duty Fuel Ratio Control
standard SAE rotation tachometer drive
Hydraulic Pump Drive
Lube System
Magnetic Pickup
Top-mounted crankcase breather, oil filter, LH oil
filler and oil level gauge, oil pan Manual Shutoff Lever
Mounting System Manual Sump Pump
Front support Pilot House Instrument Panel
General Primary Fuel Filter/Water Separator
Vibration damper and guard, Caterpillar yellow Remote-Mounted Pilot House Controls
paint, lifting eyes
Remote Positive Locking Governor Control
RH Oil Level Gauge
Shutoff Solenoid ETR
Spare Parts Kit
 3306B MARINE PROPULSION 201 bkW (270 bhp)

PERFORMANCE CURVES
C Rating DM6059-00 IMO Compliant
Engine Power

Engine Power
300 400
225 300
kW

hp
150 200
75 100

1400 1000
Torque

Torque
1000 700
Nm

lb ft
600 400
200 100

263 .432
252 .413
g/kW-hr

lb/hp-hr
BSFC

BSFC
240 .394
229 .375

1300 1500 1700 1900 2100 2300 1300 1500 1700 1900 2100 2300

Engine Speed - rpm Engine Speed - rpm

Maximum Power Maximum Power

Metric Prop Demand 201 kW English Prop Demand 270 hp

Performance Data Performance Data

Engine Engine Engine Fuel Engine Engine Engine Fuel

Speed Power Torque BSFC Rate Speed Power Torque BSFC Rate
rpm kW Nm g/kW-hr L/hr rpm hp lb ft lb/hp-hr gph
Maximum Maximum
Power 2200 201 872 240.0 57.6 Power 2200 270 643 .395 15.2
Data 2100 198 900 236.0 55.8 Data 2100 266 664 .388 14.7
2000 194 926 234.0 54.0 2000 260 683 .385 14.3
1900 190 955 232.0 52.5 1900 255 704 .381 13.9
1800 186 987 232.0 51.4 1800 249 728 .381 13.6
1700 179 1005 234.0 49.9 1700 240 741 .385 13.2
1600 170 1012 237.0 47.8 1600 227 746 .390 12.6
1500 160 1019 240.0 45.8 1500 215 752 .395 12.1
1400 151 1030 246.0 44.3 1400 202 760 .404 11.7
1300 139 1021 254.0 42.0 1300 186 753 .418 11.1
1200 128 1019 263.0 40.2 1200 172 752 .432 10.6
Prop Prop
Demand 2200 201 872 240.0 57.6 Demand 2200 270 643 .395 15.2
Data 2100 175 795 234.0 48.8 Data 2100 234 586 .385 12.9
2000 151 721 230.0 41.5 2000 202 532 .378 11.0
1900 130 651 229.0 35.4 1900 174 480 .376 9.4
1800 110 584 229.0 30.0 1800 148 431 .376 7.9
1700 93 521 229.0 25.3 1700 124 384 .376 6.7
1600 77 461 230.0 21.2 1600 104 340 .378 5.6
1500 64 406 231.0 17.6 1500 85 299 .380 4.6
1400 52 353 236.0 14.5 1400 69 260 .388 3.8
1300 42 305 242.0 12.0 1300 56 225 .398 3.2
1200 33 260 250.0 9.7 1200 44 192 .411 2.6

Cubic prop demand curve with 3.0 exponent for displacement Power produced at the flywheel will be within standard
hulls only. tolerances up to 50C (122F) combustion air temperature
measured at the air cleaner inlet, and fuel temperature
up to 52C (125F) measured at the fuel filter base.
Power rated in accordance with NMMA procedure as
crankshaft power. Reduce crankshaft power by 3% for
propeller shaft power.

PD-DM6059-00.pdf Created on 06/19/2001 11:49 2001 Caterpillar All Rights Reserved

3306B MARINE PROPULSION 201 bkW (270 bhp)
Right Side Front Footprint

03
03

03
H

01 01 01 01

L W

03
03

03
DIMENSIONS
mm in.
Overall Length 1719.2 67.7
Length from rear face of block to front of engine 1285.0 50.6
Length from rear face of block to back of flywheel housing 149.8 5.9
Overall Height 1141.0 44.9
Height from crankshaft centerline to top of engine 827.7 32.6
Height from crankshaft centerline to bottom of oil pan 313.3 12.3
Overall Width 951.1 37.4
Width from crankshaft centerline to port side (left side) 372.0 14.7
Width from crankshaft centerline to starboard side 542.8 21.4
(right side)
Front
mm in.
Customer mounting hole diameter 19.8 0.8
Width from crankshaft centerline to mounting holes 307.8 12.1
Length from rear face of block to mounting holes 935.7 36.8
1018.3 40.1
*Illustrations and dimensions from drawing: 188-1628

RATING DEFINITIONS AND CONDITIONS

C Rating Engine Performance Parameters
Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +3%
Typical Application . . . Vessels such as ferries,
Specific Fuel Consumption . . . . . . . . . . . . . . . +3%
harbor tugs, fishing boats moving at higher
Fuel Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5%
speeds out and back (e.g. lobster, crayfish,
and tuna), offshore service boats, and also Ratings are based on SAE J1228/ISO8665
displacement hull yachts and short trip coastal standard conditions of 100 kPa (29.61 in. Hg),
freighters where engine load and speed are 25C (77F), and 30% relative humidity. These
cyclical. ratings also apply at ISO3046/1, DIN6271/3, and
Typical Hours Per Year . . . . . . . . . . . 2000 to 4000 BS5514 conditions of 100 kPa (29.61 in. Hg),
Time at Rated Speed . . . . . . . . . . . . . . . . Up to 50% 27C (81F), and 60% relative humidity.
Load Factor . . . . . . . . . . . . . . . . . . . . . . . . 20 to 80% Fuel rates are based on fuel oil of 35 API
Typical Time at Full Load . . . . . 6 out of 12 hours [16C (60F)] gravity having an LHV of
42 780 kJ/kg (18,390 Btu/lb) when used at 29C
Rated Speed . . . . . . . . . . . . . . . . . . . . . . . . 2200 rpm (85F) and weighing 838.9 g/L (7.001 lb/U.S. gal).
Maximum Cruise Speed. . . . . . . . . . . . . . . 2100 rpm
Additional ratings may be available for specific
Maximum Continuous Cruise Speed. . . . 2000 rpm
customer requirements. Consult your Caterpillar
representative for additional information.
 3306B MARINE PROPULSION 201 bkW (270 bhp)

Performance data is calculated in accordance with tolerances and conditions stated in this specification sheet and is only intended for purposes of
comparison with other manufacturers engines. Actual engine performance may vary according to the particular application of the engine and
operating conditions beyond Caterpillars control.
TMI Reference No.: DM6059-00 (6-19-01)
Materials and specifications are subject to change without notice. The International System of Units (SI) is used in this publication.
LEHM1240-00 (6-01) Printed in U.S.A. 2001 Caterpillar
Supersedes LEHM7240-01 All rights reserved.
 Marine
Propulsion 3306B
Engine
175 bkW (235 bhp) 238 mhp @ 2000 rpm

SPECIFICATIONS
I-6, 4-Stroke-Cycle-Diesel
Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . IMO compliant
Displacement . . . . . . . . . . . . . . . . . . . . . 10.5 L (641 cu in.)
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 mm (4.8 in.)
Stroke. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 mm (6.0 in.)
Aspiration . . . . . . . . . . . . . . . . Turbocharged-Aftercooled
Governor . . . . . . . . . . . . . . . . . . . . . . . . Hydra-mechanical
Engine Weight, Net Dry (approx) . . 1120.9 kg (2469 lb)
Capacity for Liquids
Cooling System . . . . . . . . . . . . . . . 18.2 L (4.8 U.S. gal)
Lube Oil System (refill) . . . . . . . . 27.4 L (7.2 U.S. gal)
Oil Change Interval . . . . . . . . . . . . . . . . . . . . . . . . . . 250 hr
Caterpillar DEO 10W30 or 15W40
Shown with
Accessory Equipment Rotation (from flywheel end) . . . . . . . Counterclockwise

STANDARD EQUIPMENT ACCESSORY EQUIPMENT

Air Inlet System Air Cleaner Rain Cap
Dry, regular duty air cleaner Air Starting Motor
Cooling System 12V 51 Amp, 24V 35 Amp, 24V 60 Amp Alternator
Gear driven, self-priming auxiliary sea water pump
Auxiliary Drive Pulley
with rotary rubber impeller; gear driven centrifugal
jacket water pump; engine oil cooler; expansion Digital Tachometer
tank; engine mounted heat exchanger with Double Wall Fuel Lines and Drain
removable tube bundle and replaceable copper-
nickel tubes; thermostats and housing Duplex Fuel Filter

Exhaust System Electric Overspeed Shutoff

Watercooled manifold and turbocharger; dry elbow Electric Starting Motor
and flange, 152 mm (6 in.) Engine-Mounted Instrument Panel
Flywheel and Flywheel Housing Ether Starting Aid
SAE No. 1 (156 teeth)
Exhaust Elbow, Pipe, Rain Cap, Flexible Fittings
Fuel System
Front Enclosed Clutch
Fuel priming pump, fuel transfer pump, fuel filter,
flexible fuel lines Fuel Ratio Control
Instruments Hydraulic Pump Drive
Fuel pressure gauge, service meter, heavy-duty Magnetic Pickup
standard SAE rotation tachometer drive
Manual Shutoff Lever
Lube System
Manual Sump Pump
Top-mounted crankcase breather, oil filter, LH oil
filler and oil level gauge, oil pan Pilot House Instrument Panel

Mounting System Primary Fuel Filter/Water Separator

Front support Remote-Mounted Pilot House Controls
General Remote Positive Locking Governor Control
Vibration damper and guard, Caterpillar yellow RH Oil Level Gauge
paint, lifting eyes
Shutoff Solenoid ETR
Spare Parts Kit
 3306B MARINE PROPULSION 175 bkW (235 bhp)

PERFORMANCE CURVES
A Rating DM6056-00 IMO Compliant
Engine Power

Engine Power
300 300
225 225
kW

hp
150 150
75 75

1300 900
Torque

Torque
900 600
Nm

lb ft
500 300
100 0

250 .411
241 .396
g/kW-hr

lb/hp-hr
BSFC

BSFC
232 .381
223 .366

1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100

Engine Speed - rpm Engine Speed - rpm

Maximum Power Maximum Power

Metric Prop Demand 175 kW English Prop Demand 235 hp

Performance Data Performance Data

Engine Engine Engine Fuel Engine Engine Engine Fuel

Speed Power Torque BSFC Rate Speed Power Torque BSFC Rate
rpm kW Nm g/kW-hr L/hr rpm hp lb ft lb/hp-hr gph
Maximum Maximum
Power 2000 175 836 229.0 47.7 Power 2000 235 617 .376 12.6
Data 1900 172 866 227.0 46.6 Data 1900 231 639 .373 12.3
1800 167 887 225.0 44.9 1800 224 654 .370 11.9
1700 160 901 225.0 43.0 1700 215 665 .370 11.4
1600 153 913 225.0 41.0 1600 205 673 .370 10.8
1500 146 927 225.0 39.0 1500 195 684 .370 10.3
1400 138 941 224.0 36.8 1400 185 694 .368 9.7
1300 129 950 223.0 34.4 1300 173 701 .367 9.1
1200 120 956 223.0 32.0 1200 161 705 .367 8.5
Prop Prop
Demand 2000 175 836 229.0 47.7 Demand 2000 235 617 .376 12.6
Data 1900 150 754 227.0 40.6 Data 1900 201 556 .373 10.7
1800 128 677 226.0 34.4 1800 171 499 .372 9.1
1700 108 604 227.0 29.0 1700 144 445 .373 7.7
1600 90 535 228.0 24.3 1600 120 395 .375 6.4
1500 74 470 230.0 20.3 1500 99 347 .378 5.4
1400 60 409 234.0 16.8 1400 80 302 .385 4.4
1300 48 353 241.0 13.8 1300 65 260 .396 3.6
1200 38 301 250.0 11.3 1200 51 222 .411 3.0

Cubic prop demand curve with 3.0 exponent for displacement Power produced at the flywheel will be within standard
hulls only. tolerances up to 50C (122F) combustion air temperature
measured at the air cleaner inlet, and fuel temperature
up to 52C (125F) measured at the fuel filter base.
Power rated in accordance with NMMA procedure as
crankshaft power. Reduce crankshaft power by 3% for
propeller shaft power.

PD-DM6056-00.pdf Created on 06/19/2001 11:49 2001 Caterpillar All Rights Reserved

3306B MARINE PROPULSION 175 bkW (235 bhp)
Right Side Front Footprint

03
03

03
H

01 01 01 01

L W

03
03

03
DIMENSIONS*
mm in.
Overall Length 1719.2 67.7
Length from rear face of block to front of engine 1285.0 50.6
Length from rear face of block to back of flywheel housing 149.8 5.9
Overall Height 1141.0 44.9
Height from crankshaft centerline to top of engine 827.7 32.6
Height from crankshaft centerline to bottom of oil pan 313.3 12.3
Overall Width 977.6 38.5
Width from crankshaft centerline to port side (left side) 434.8 17.1
Width from crankshaft centerline to starboard side 542.8 21.4
(right side)
Front
mm in.
Customer mounting hole diameter 19.8 0.8
Width from crankshaft centerline to mounting holes 307.8 12.1
Length from rear face of block to mounting holes 935.7 36.8
1018.3 40.1
*Illustrations and dimensions from drawing: 118-7821

RATING DEFINITIONS AND CONDITIONS

A Rating Engine Performance Parameters
Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +3%
Typical Application . . . For heavy-duty service
Specific Fuel Consumption . . . . . . . . . . . . . . . +3%
in vessels such as freighters, tugboats, bottom
Fuel Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5%
drag trawlers, and deep river towboats where
the engine is operated at rated load and speed Ratings are based on SAE J1228/ISO8665
up to 100% of the time without interruption or standard conditions of 100 kPa (29.61 in. Hg),
load cycling. 25C (77F), and 30% relative humidity. These
Typical Hours Per Year . . . . . . . . . . . 5000 to 8000 ratings also apply at ISO3046/1, DIN6271/3, and
Time at Rated Speed. . . . . . . . . . . . . . . Up to 100% BS5514 conditions of 100 kPa (29.61 in. Hg),
27C (81F), and 60% relative humidity.
Load Factor . . . . . . . . . . . . . . . . . . . . . . . 80 to 100%
Typical Time at Full Load . . . . . . . . . . . . . No limit Fuel rates are based on fuel oil of 35 API
[16C (60F)] gravity having an LHV of
42 780 kJ/kg (18,390 Btu/lb) when used at 29C
(85F) and weighing 838.9 g/L (7.001 lb/U.S. gal).
Additional ratings may be available for specific
customer requirements. Consult your Caterpillar
representative for additional information.
 3306B MARINE PROPULSION 175 bkW (235 bhp)

Performance data is calculated in accordance with tolerances and conditions stated in this specification sheet and is only intended for purposes of
comparison with other manufacturers engines. Actual engine performance may vary according to the particular application of the engine and
operating conditions beyond Caterpillars control.
TMI Reference No.: DM6056-00 (6-19-01)
Materials and specifications are subject to change without notice. The International System of Units (SI) is used in this publication.
LEHM1239-00 (6-01) Printed in U.S.A. 2001 Caterpillar
Supersedes LEHM7240-01 All rights reserved.
 Marine
Propulsion 3306B
Engine
187 bkW (250 bhp) 254 mhp @ 2000 rpm

SPECIFICATIONS
I-6, 4-Stroke-Cycle-Diesel
Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . IMO compliant
Displacement . . . . . . . . . . . . . . . . . . . . 10.5 L (641 cu. in.)
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 mm (4.8 in.)
Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 mm (6.0 in.)
Aspiration . . . . . . . . . . . . . . . . Turbocharged-Aftercooled
Governor . . . . . . . . . . . . . . . . . . . . . . . . Hydra-mechanical
Engine Weight, Net Dry (approx) . . 1120.9 kg (2469 lb)
Capacity for Liquids
Cooling System . . . . . . . . . . . . . . . 18.2 L (4.8 U.S. gal)
Lube Oil System (refill) . . . . . . . . 27.4 L (7.2 U.S. gal)
Oil Change Interval . . . . . . . . . . . . . . . . . . . . . . . . . . 250 hr
Caterpillar DEO 10W30 or 15W40
Shown with Rotation (from flywheel end) . . . . . . . Counterclockwise
Accessory Equipment

STANDARD EQUIPMENT ACCESSORY EQUIPMENT

Air Inlet System Air Cleaner Rain Cap
Dry, regular duty air cleaner Air Starting Motor
Cooling System 12V 51 Amp, 24V 35 Amp, 24V 60 Amp Alternator
Gear driven, self-priming auxiliary sea water pump
Auxiliary Drive Pulley
with rotary rubber impeller; gear driven centrifugal
jacket water pump; engine oil cooler; expansion Digital Tachometer
tank; engine mounted heat exchanger with Double Wall Fuel Lines and Drain
removable tube bundle and replaceable copper-
nickel tubes; thermostats and housing Duplex Fuel Filter

Exhaust System Electric Overspeed Shutoff

Watercooled manifold and turbocharger; dry elbow Electric Starting Motor
and flange, 152 mm (6 in.) Engine-Mounted Instrument Panel
Flywheel and Flywheel Housing Ether Starting Aid
SAE No. 1 (156 teeth)
Exhaust Elbow, Pipe, Rain Cap, Flexible Fittings
Fuel System
Front Enclosed Clutch
Fuel priming pump, fuel transfer pump, fuel filter,
flexible fuel lines Fuel Ratio Control
Instruments Hydraulic Pump Drive
Fuel pressure gauge, service meter, heavy-duty Magnetic Pickup
standard SAE rotation tachometer drive
Manual Shutoff Lever
Lube System
Manual Sump Pump
Top-mounted crankcase breather, oil filter, LH oil
filler and oil level gauge, oil pan Pilot House Instrument Panel

Mounting System Primary Fuel Filter/Water Separator

Front support Remote-Mounted Pilot House Controls
General Remote Positive Locking Governor Control
Vibration damper and guard, Caterpillar yellow RH Oil Level Gauge
paint, lifting eyes
Shutoff Solenoid ETR
Spare Parts Kit
 3306B MARINE PROPULSION 187 bkW (250 bhp)

PERFORMANCE CURVES
B Rating DM6055-00 IMO Compliant
Engine Power

Engine Power
300 400
225 300
kW

hp
150 200
75 100

1400 1000
Torque

Torque
1000 700
Nm

lb ft
600 400
200 100

246 .404
g/kW-hr

lb/hp-hr
239 .393
BSFC

BSFC
232 .382
225 .371

1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100

Engine Speed - rpm Engine Speed - rpm

Maximum Power Maximum Power

Metric Prop Demand 187 kW English Prop Demand 250 hp

Performance Data Performance Data

Engine Engine Engine Fuel Engine Engine Engine Fuel

Speed Power Torque BSFC Rate Speed Power Torque BSFC Rate
rpm kW Nm g/kW-hr L/hr rpm hp lb ft lb/hp-hr gph
Maximum Maximum
Power 2000 187 891 229.0 50.9 Power 2000 250 657 .376 13.4
Data 1900 184 924 227.0 49.8 Data 1900 246 681 .373 13.2
1800 178 946 226.0 48.1 1800 239 698 .372 12.7
1700 171 962 226.0 46.1 1700 230 709 .372 12.2
1600 164 976 226.0 44.0 1600 219 720 .372 11.6
1500 156 993 225.0 41.9 1500 209 732 .370 11.1
1400 148 1007 225.0 39.5 1400 198 743 .370 10.4
Prop Prop
Demand 2000 187 890 229.0 50.9 Demand 2000 250 656 .376 13.4
Data 1900 160 804 227.0 43.2 Data 1900 214 593 .373 11.4
1800 136 721 226.0 36.6 1800 182 532 .372 9.7
1700 115 643 226.0 30.8 1700 154 474 .372 8.1
1600 96 570 227.0 25.8 1600 128 420 .373 6.8
1500 79 501 229.0 21.4 1500 106 369 .376 5.7
1400 64 436 232.0 17.7 1400 86 322 .381 4.7
1200 40 321 246.0 11.8 1200 54 237 .404 3.1

Cubic prop demand curve with 3.0 exponent for displacement Power produced at the flywheel will be within standard
hulls only. tolerances up to 50C (122F) combustion air temperature
measured at the air cleaner inlet, and fuel temperature
up to 52C (125F) measured at the fuel filter base.
Power rated in accordance with NMMA procedure as
crankshaft power. Reduce crankshaft power by 3% for
propeller shaft power.

PD-DM6055-00.pdf Created on 06/19/2001 11:49 2001 Caterpillar All Rights Reserved

3306B MARINE PROPULSION 187 bkW (250 bhp)
Right Side Front Footprint

03
03

03
H

01 01 01 01

L W

03
03

03
DIMENSIONS*

mm in.
Overall Length 1719.2 67.7
Length from rear face of block to front of engine 1285.0 50.6
Length from rear face of block to back of flywheel housing 149.8 5.9
Overall Height 1141.0 44.9
Height from crankshaft centerline to top of engine 827.7 32.6
Height from crankshaft centerline to bottom of oil pan 313.3 12.3
Overall Width 977.6 38.5
Width from crankshaft centerline to port side (left side) 434.8 17.1
Width from crankshaft centerline to starboard side 542.8 21.4
(right side)
Front
mm in.
Customer mounting hole diameter 19.8 0.8
Width from crankshaft centerline to mounting holes 307.8 12.1
Length from rear face of block to mounting holes 935.7 36.8
1018.3 40.1
*Illustrations and dimensions from drawing: 118-7821

RATING DEFINITIONS AND CONDITIONS

B Rating Engine Performance Parameters
Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +3%
Typical Application . . . Vessels such as
Specific Fuel Consumption . . . . . . . . . . . . . . . +3%
midwater trawlers, purse seiners, crew and
Fuel Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5%
supply boats, ferries, and towboats where locks,
sandbars, and curves dictate frequent slowing, Ratings are based on SAE J1228/ISO8665
and engine load and speed are constant with standard conditions of 100 kPa (29.61 in. Hg),
some cycling. 25C (77F), and 30% relative humidity. These
Typical Hours Per Year . . . . . . . . . . . 3000 to 5000 ratings also apply at ISO3046/1, DIN6271/3, and
Time at Rated Speed . . . . . . . . . . . . . . . . Up to 80% BS5514 conditions of 100 kPa (29.61 in. Hg),
27C (81F), and 60% relative humidity.
Load Factor . . . . . . . . . . . . . . . . . . . . . . . . 40 to 80%
Typical Time at Full Load . . . . 10 out of 12 hours Fuel rates are based on fuel oil of 35 API
[16C (60F)] gravity having an LHV of
Rated Speed . . . . . . . . . . . . . . . . . . . . . . . . 2000 rpm 42 780 kJ/kg (18,390 Btu/lb) when used at 29C
Maximum Cruise Speed. . . . . . . . . . . . . . . 1900 rpm (85F) and weighing 838.9 g/L (7.001 lb/U.S. gal).
Maximum Continuous Cruise Speed. . . . 1800 rpm
Additional ratings may be available for specific
customer requirements. Consult your Caterpillar
representative for additional information.
 3306B MARINE PROPULSION 187 bkW (250 bhp)

Performance data is calculated in accordance with tolerances and conditions stated in this specification sheet and is only intended for purposes of
comparison with other manufacturers engines. Actual engine performance may vary according to the particular application of the engine and
operating conditions beyond Caterpillars control.
TMI Reference No.: DM6055-00 (6-19-01)
Materials and specifications are subject to change without notice. The International System of Units (SI) is used in this publication.
LEHM1238-00 (6-01) Printed in U.S.A. 2001 Caterpillar
Supersedes LEHM7240-01 All rights reserved.
 Marine
Propulsion 3306B
Engine
235 bkW (315 bhp) 319 mhp @ 2200 rpm

SPECIFICATIONS
I-6, 4-Stroke-Cycle-Diesel
Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . IMO compliant
Displacement . . . . . . . . . . . . . . . . . . . . 10.5 L (641 cu. in.)
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 mm (4.8 in.)
Stroke. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 mm (6.0 in.)
Aspiration . . . . . . . . . . . . . . . . Turbocharged-Aftercooled
Governor . . . . . . . . . . . . . . . . . . . . . . . . Hydra-mechanical
Engine Weight, Net Dry (approx) . . 1120.9 kg (2469 lb)
Capacity for Liquids
Cooling System . . . . . . . . . . . . . . . 18.2 L (4.8 U.S. gal)
Lube Oil System (refill) . . . . . . . . 27.4 L (7.2 U.S. gal)
Oil Change Interval . . . . . . . . . . . . . . . . . . . . . . . . . . 250 hr
Caterpillar DEO 10W30 or 15W40
Shown with
Accessory Equipment Rotation (from flywheel end) . . . . . . . Counterclockwise

STANDARD EQUIPMENT ACCESSORY EQUIPMENT

Air Inlet System Air Cleaner Rain Cap
Dry, regular duty air cleaner Air Starting Motor
Cooling System 12V 51 Amp, 24V 35 Amp, 24V 60 Amp Alternator
Gear driven centrifugal jacket water pump, engine
Auxiliary Drive Pulley
oil cooler, expansion tank, thermostats and
housing, transmission oil cooler Digital Tachometer
Exhaust System Double Wall Fuel Lines and Drain
Watercooled manifold and turbocharger; dry elbow Duplex Fuel Filter
and flange, 152 mm (6 in.)
Electric Overspeed Shutoff
Flywheel and Flywheel Housing
Electric Starting Motor
SAE No. 1 (156 teeth)
Engine-Mounted Instrument Panel
Fuel System
Ether Starting Air
Fuel priming pump, fuel transfer pump, fuel filter,
flexible fuel lines Exhaust Elbow, Pipe, Rain Cap, Flexible Fittings
Instruments Front Enclosed Clutch
Fuel pressure gauge, service meter, heavy-duty Fuel Ratio Control
standard SAE rotation tachometer drive
Hydraulic Pump Drive
Lube System
Magnetic Pickup
Top-mounted crankcase breather, oil filter, LH oil
filler and oil level gauge, oil pan Manual Shutoff Lever
Mounting System Manual Sump Pump
Front support Pilot House Instrument Panel
General Primary Fuel Filter/Water Separator
Vibration damper and guard, Caterpillar yellow Remote-Mounted Pilot House Controls
paint, lifting eyes
Remote Positive Locking Governor Control
RH Oil Level Gauge
Shutoff Solenoid ETR
Spare Parts Kit
 3306B MARINE PROPULSION 235 bkW (315 bhp)

PERFORMANCE CURVES
D Rating DM6058-00 IMO Compliant
Engine Power

Engine Power
300 500
225 300
kW

hp
150 100
75 -100

1500 1200
Torque

Torque
1100 800
Nm

lb ft
700 400
300 0

244 .401
235 .386
g/kW-hr

lb/hp-hr
BSFC

BSFC
225 .371
216 .356

1300 1500 1700 1900 2100 2300 1300 1500 1700 1900 2100 2300

Engine Speed - rpm Engine Speed - rpm

Maximum Power Maximum Power

Metric Prop Demand 235 kW English Prop Demand 315 hp

Performance Data Performance Data

Engine Engine Engine Fuel Engine Engine Engine Fuel

Speed Power Torque BSFC Rate Speed Power Torque BSFC Rate
rpm kW Nm g/kW-hr L/hr rpm hp lb ft lb/hp-hr gph
Maximum Maximum
Power 2200 235 1020 227.0 63.5 Power 2200 315 752 .373 16.8
Data 2100 230 1046 222.0 60.9 Data 2100 308 771 .365 16.1
2000 224 1071 219.0 58.7 2000 301 790 .360 15.5
1900 219 1102 218.0 56.8 1900 294 813 .358 15.0
1800 212 1122 216.0 54.6 1800 284 827 .355 14.4
1700 200 1122 217.0 51.7 1700 268 827 .357 13.7
1600 188 1122 219.0 49.1 1600 252 827 .360 13.0
1500 176 1122 223.0 46.8 1500 236 827 .367 12.4
1400 165 1122 228.0 44.6 1400 221 827 .375 11.8
1300 146 1071 233.0 40.6 1300 196 790 .383 10.7
1200 128 1020 241.0 36.8 1200 172 752 .396 9.7
Prop Prop
Demand 2200 235 1020 227.0 63.5 Demand 2200 315 752 .373 16.8
Data 2100 204 929 222.0 54.0 Data 2100 274 685 .365 14.3
2000 177 843 219.0 46.1 2000 237 622 .360 12.2
1900 151 761 218.0 39.3 1900 203 561 .358 10.4
1800 129 683 217.0 33.3 1800 173 504 .357 8.8
1700 108 609 219.0 28.2 1700 145 449 .360 7.4
1600 90 540 222.0 23.9 1600 121 398 .365 6.3
1500 75 474 226.0 20.0 1500 100 350 .372 5.3
1400 61 413 230.0 16.6 1400 81 305 .378 4.4
1300 49 356 236.0 13.7 1300 65 263 .388 3.6
1200 38 303 244.0 11.1 1200 51 223 .401 2.9

Cubic prop demand curve with 3.0 exponent for displacement Power produced at the flywheel will be within standard
hulls only. tolerances up to 50C (122F) combustion air temperature
measured at the air cleaner inlet, and fuel temperature
up to 52C (125F) measured at the fuel filter base.
Power rated in accordance with NMMA procedure as
crankshaft power. Reduce crankshaft power by 3% for
propeller shaft power.

PD-DM6058-00.pdf Created on 06/19/2001 11:49 2001 Caterpillar All Rights Reserved

3306B MARINE PROPULSION 235 bkW (315 bhp)
Right Side Front Footprint

03
03

03
H

01 01 01 01

L W

03
03

03
DIMENSIONS*
mm in.
Overall Length 1719.2 67.7
Length from rear face of block to front of engine 1285.0 50.6
Length from rear face of block to back of flywheel housing 149.8 5.9
Overall Height 1141.0 44.9
Height from crankshaft centerline to top of engine 827.7 32.6
Height from crankshaft centerline to bottom of oil pan 313.3 12.3
Overall Width 951.1 37.4
Width from crankshaft centerline to port side (left side) 372.0 14.7
Width from crankshaft centerline to starboard side 542.8 21.4
(right side)
Front
mm in.
Customer mounting hole diameter 19.8 0.8
Width from crankshaft centerline to mounting holes 307.8 12.1
Length from rear face of block to mounting holes 935.7 36.8
1018.3 40.1
*Illustrations and dimensions from drawing: 188-1628

RATING DEFINITIONS AND CONDITIONS

D Rating Engine Performance Parameters
Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +3%
Typical Application . . . Planing hull vessels such
Specific Fuel Consumption . . . . . . . . . . . . . . . +3%
as offshore patrol boats, customs, police, and
Fuel Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5%
some fire and fishing boats. Also used for bow
and stern thrusters. Ratings are based on SAE J1228/ISO8665
Typical Hours Per Year . . . . . . . . . . . 1000 to 3000 standard conditions of 100 kPa (29.61 in. Hg),
Time at Rated Speed . . . . . . . . . . . . . . . . Up to 16% 25C (77F), and 30% relative humidity. These
ratings also apply at ISO3046/1, DIN6271/3, and
Load Factor . . . . . . . . . . . . . . . . . . . . . . . . Up to 50%
BS5514 conditions of 100 kPa (29.61 in. Hg),
Typical Time at Full Load . . . . . 2 out of 12 hours 27C (81F), and 60% relative humidity.
Rated Speed . . . . . . . . . . . . . . . . . . . . . . . . 2200 rpm Fuel rates are based on fuel oil of 35 API
Maximum Cruise Speed. . . . . . . . . . . . . . . 2050 rpm [16C (60F)] gravity having an LHV of
Maximum Continuous Cruise Speed. . . . 1900 rpm 42 780 kJ/kg (18,390 Btu/lb) when used at 29C
(85F) and weighing 838.9 g/L (7.001 lb/U.S. gal).
Additional ratings may be available for specific
customer requirements. Consult your Caterpillar
representative for additional information.
 3306B MARINE PROPULSION 235 bkW (315 bhp)

Performance data is calculated in accordance with tolerances and conditions stated in this specification sheet and is only intended for purposes of
comparison with other manufacturers engines. Actual engine performance may vary according to the particular application of the engine and
operating conditions beyond Caterpillars control.
TMI Reference No.: DM6058-00 (6-19-01)
Materials and specifications are subject to change without notice. The International System of Units (SI) is used in this publication.
LEHM1237-00 (6-01) Printed in U.S.A. 2001 Caterpillar
Supersedes LEHM7240-01 All rights reserved.
 Marine
Propulsion 3306B
Engine
261 bkW (350 bhp) 355 mhp @ 2200 rpm

SPECIFICATIONS
I-6, 4-Stroke-Cycle-Diesel
Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . IMO compliant
Displacement . . . . . . . . . . . . . . . . . . . . 10.5 L (641 cu. in.)
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 mm (4.8 in.)
Stroke. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 mm (6.0 in.)
Aspiration . . . . . . . . . . . . . . . . Turbocharged-Aftercooled
Governor . . . . . . . . . . . . . . . . . . . . . . . . Hydra-mechanical
Engine Weight, Net Dry (approx) . . 1120.9 kg (2469 lb)
Capacity for Liquids
Cooling System . . . . . . . . . . . . . . . 18.2 L (4.8 U.S. gal)
Lube Oil System (refill) . . . . . . . . 27.4 L (7.2 U.S. gal)
Oil Change Interval . . . . . . . . . . . . . . . . . . . . . . . . . . 250 hr
Caterpillar DEO 10W30 or 15W40
Shown with
Accessory Equipment
Rotation (from flywheel end) . . . . . . . Counterclockwise

STANDARD EQUIPMENT ACCESSORY EQUIPMENT

Air Inlet System Air Cleaner Rain Cap
Dry, regular duty air cleaner Air Starting Motor
Cooling System 12V 51 Amp, 24V 35 Amp, 24V 60 Amp Alternator
Gear driven centrifugal jacket water pump, engine
Auxiliary Drive Pulley
oil cooler, expansion tank, thermostats and
housing, transmission oil cooler Digital Tachometer
Exhaust System Double Wall Fuel Lines and Drain
Watercooled manifold and turbocharger; dry elbow Duplex Fuel Filter
and flange, 152 mm (6 in.)
Electric Overspeed Shutoff
Flywheel and Flywheel Housing
Electric Starting Motor
SAE No. 1 (156 teeth)
Engine-Mounted Instrument Panel
Fuel System
Ether Starting Air
Fuel priming pump, fuel transfer pump, fuel filter,
flexible fuel lines Exhaust Elbow, Pipe, Rain Cap, Flexible Fittings
Instruments Front Enclosed Clutch
Fuel pressure gauge, service meter, heavy-duty Fuel Ratio Control
standard SAE rotation tachometer drive
Hydraulic Pump Drive
Lube System
Magnetic Pickup
Top-mounted crankcase breather, oil filter, LH oil
filler and oil level gauge, oil pan Manual Shutoff Lever
Mounting System Manual Sump Pump
Front support Pilot House Instrument Panel
General Primary Fuel Filter/Water Separator
Vibration damper and guard, Caterpillar yellow Remote-Mounted Pilot House Controls
paint, lifting eyes
Remote Positive Locking Governor Control
RH Oil Level Gauge
Shutoff Solenoid ETR
Spare Parts Kit
 3306B MARINE PROPULSION 261 bkW (350 bhp)

PERFORMANCE CURVES
E Rating DM6057-00 IMO Compliant
Engine Power

Engine Power
400 500
300 300
kW

hp
200 100
100 -100

1600 1300
Torque

Torque
1100 900
Nm

lb ft
600 500
100 100

243 .399
234 .384
g/kW-hr

lb/hp-hr
BSFC

BSFC
225 .369
216 .354

1300 1500 1700 1900 2100 2300 1300 1500 1700 1900 2100 2300

Engine Speed - rpm Engine Speed - rpm

Maximum Power Maximum Power

Metric Prop Demand 261 kW English Prop Demand 350 hp

Performance Data Performance Data

Engine Engine Engine Fuel Engine Engine Engine Fuel

Speed Power Torque BSFC Rate Speed Power Torque BSFC Rate
rpm kW Nm g/kW-hr L/hr rpm hp lb ft lb/hp-hr gph
Maximum Maximum
Power 2200 261 1133 232.0 72.1 Power 2200 350 836 .381 19.0
Data 2100 258 1173 228.0 70.0 Data 2100 346 865 .375 18.5
2000 255 1218 225.0 68.3 2000 342 898 .370 18.0
1900 251 1260 223.0 66.5 1900 336 929 .367 17.6
1800 243 1291 221.0 64.2 1800 326 952 .363 17.0
1700 230 1291 221.0 60.6 1700 308 952 .363 16.0
1600 216 1292 222.0 57.3 1600 290 953 .365 15.1
1500 203 1292 225.0 54.4 1500 272 953 .370 14.4
1400 189 1291 229.0 51.6 1400 254 952 .376 13.6
1300 165 1212 235.0 46.2 1300 221 894 .386 12.2
1200 142 1133 243.0 41.3 1200 191 836 .399 10.9
Prop Prop
Demand 2200 261 1133 232.0 72.1 Demand 2200 350 836 .381 19.0
Data 2100 227 1032 223.0 60.3 Data 2100 304 761 .367 15.9
2000 196 936 219.0 51.1 2000 263 690 .360 13.5
1900 168 845 216.0 43.4 1900 225 623 .355 11.5
1800 143 758 216.0 36.8 1800 192 559 .355 9.7
1700 120 676 217.0 31.2 1700 161 499 .357 8.2
1600 100 599 220.0 26.3 1600 135 442 .362 6.9
1500 83 527 224.0 22.1 1500 111 389 .368 5.8
1400 67 459 228.0 18.3 1400 90 339 .375 4.8
1300 54 396 233.0 14.9 1300 72 292 .383 3.9
1200 42 337 239.0 12.1 1200 57 249 .393 3.2

Cubic prop demand curve with 3.0 exponent for displacement Power produced at the flywheel will be within standard
hulls only. tolerances up to 50C (122F) combustion air temperature
measured at the air cleaner inlet, and fuel temperature
up to 52C (125F) measured at the fuel filter base.
Power rated in accordance with NMMA procedure as
crankshaft power. Reduce crankshaft power by 3% for
propeller shaft power.

PD-DM6057-00.pdf Created on 06/19/2001 11:49 2001 Caterpillar All Rights Reserved

3306B MARINE PROPULSION 261 bkW (350 bhp)
Right Side Front Footprint

03
03

03
H

01 01 01 01

L W

03
03

03
DIMENSIONS*
mm in.
Overall Length 1719.2 67.7
Length from rear face of block to front of engine 1285.0 50.6
Length from rear face of block to back of flywheel housing 149.8 5.9
Overall Height 1141.0 44.9
Height from crankshaft centerline to top of engine 827.7 32.6
Height from crankshaft centerline to bottom of oil pan 313.3 12.3
Overall Width 951.1 37.4
Width from crankshaft centerline to port side (left side) 372.0 14.7
Width from crankshaft centerline to starboard side 542.8 21.4
(right side)
Front
mm in.
Customer mounting hole diameter 19.8 0.8
Width from crankshaft centerline to mounting holes 307.8 12.1
Length from rear face of block to mounting holes 935.7 36.8
1018.3 40.1
*Illustrations and dimensions from drawing:188-1628

RATING DEFINITIONS AND CONDITIONS

E Rating Engine Performance Parameters
Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +3%
Typical Application . . . Planing hull vessels such
Specific Fuel Consumption . . . . . . . . . . . . . . . +3%
as pleasure craft, harbor patrol, harbor master,
Fuel Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5%
and some fishing and pilot boats.
Typical Hours Per Year . . . . . . . . . . . . 250 to 1000 Ratings are based on SAE J1228/ISO8665
Time at Rated Speed . . . . . . . . . . . . . . . . . Up to 8% standard conditions of 100 kPa (29.61 in. Hg),
25C (77F), and 30% relative humidity. These
Load Factor . . . . . . . . . . . . . . . . . . . . . . . . Up to 30%
ratings also apply at ISO3046/1, DIN6271/3, and
Typical Time at Full Load . . . . 1/2 out of 6 hours BS5514 conditions of 100 kPa (29.61 in. Hg),
Rated Speed . . . . . . . . . . . . . . . . . . . . . . . . 2200 rpm 27C (81F), and 60% relative humidity.
Maximum Cruise Speed. . . . . . . . . . . . . . . 2050 rpm Fuel rates are based on fuel oil of 35 API
Maximum Continuous Cruise Speed. . . . 1900 rpm [16C (60F)] gravity having an LHV of
42 780 kJ/kg (18,390 Btu/lb) when used at 29C
(85F) and weighing 838.9 g/L (7.001 lb/U.S. gal).
Additional ratings may be available for specific
customer requirements. Consult your Caterpillar
representative for additional information.
 3306B MARINE PROPULSION 261 bkW (350 bhp)

Performance data is calculated in accordance with tolerances and conditions stated in this specification sheet and is only intended for purposes of
comparison with other manufacturers engines. Actual engine performance may vary according to the particular application of the engine and
operating conditions beyond Caterpillars control.
TMI Reference No.: DM6057-00 (6-19-01)
Materials and specifications are subject to change without notice. The International System of Units (SI) is used in this publication.
LEHM1236-00 (6-01) Printed in U.S.A. 2001 Caterpillar
Supersedes LEHM7240-01 All rights reserved.
 Marine
Propulsion 3306B
Engine
216 bkW (290 bhp) 294 mhp @ 2200 rpm

SPECIFICATIONS
I-6, 4-Stroke-Cycle-Diesel
Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . IMO compliant
Displacement . . . . . . . . . . . . . . . . . . . . 10.5 L (641 cu. in.)
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 mm (4.8 in.)
Stroke. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 mm (6.0 in.)
Aspiration . . . . . . . . . . . . . . . . Turbocharged-Aftercooled
Governor . . . . . . . . . . . . . . . . . . . . . . . . Hydra-mechanical
Engine Weight, Net Dry (approx) . . 1120.9 kg (2469 lb)
Capacity for Liquids
Cooling System . . . . . . . . . . . . . . . 18.2 L (4.8 U.S. gal)
Lube Oil System (refill) . . . . . . . . 27.4 L (7.2 U.S. gal)
Oil Change Interval . . . . . . . . . . . . . . . . . . . . . . . . . . 250 hr
Caterpillar DEO 10W30 or 15W40
Shown with
Accessory Equipment Rotation (from flywheel end) . . . . . . . Counterclockwise

STANDARD EQUIPMENT ACCESSORY EQUIPMENT

Air Inlet System Air Cleaner Rain Cap
Dry, regular duty air cleaner Air Starting Motor
Cooling System 12V 51 Amp, 24V 35 Amp, 24V 60 Amp Alternator
Gear driven, self-priming auxiliary sea water pump
Auxiliary Drive Pulley
with rotary rubber impeller; gear driven centrifugal
jacket water pump; engine oil cooler; expansion Digital Tachometer
tank; engine mounted heat exchanger with Double Wall Fuel Lines and Drain
removable tube bundle and replaceable copper-
nickel tubes; thermostats and housing Duplex Fuel Filter

Exhaust System Electric Overspeed Shutoff

Watercooled manifold and turbocharger; dry elbow Electric Starting Motor
and flange, 152 mm (6 in.) Engine-Mounted Instrument Panel
Flywheel and Flywheel Housing Ether Starting Aid
SAE No. 1 (156 teeth)
Exhaust Elbow, Pipe, Rain Cap, Flexible Fittings
Fuel System
Front Enclosed Clutch
Fuel priming pump, fuel transfer pump, fuel filter,
flexible fuel lines Fuel Ratio Control
Instruments Hydraulic Pump Drive
Fuel pressure gauge, service meter, heavy-duty Magnetic Pickup
standard SAE rotation tachometer drive
Manual Shutoff Lever
Lube System
Manual Sump Pump
Top-mounted crankcase breather, oil filter, LH oil
filler and oil level gauge, oil pan Pilot House Instrument Panel

Mounting System Primary Fuel Filter/Water Separator

Front support Remote-Mounted Pilot House Controls
General Remote Positive Locking Governor Control
Vibration damper and guard, Caterpillar yellow RH Oil Level Gauge
paint, lifting eyes
Shutoff Solenoid ETR
Spare Parts Kit
 3306B MARINE PROPULSION 216 bkW (290 bhp)

PERFORMANCE CURVES
C Rating DM6054-00 IMO Compliant
Engine Power

Engine Power
300 400
225 300
kW

hp
150 200
75 100

1400 1000
1000 700
Torque

Torque
Nm

lb ft
600 400
200 100

226 .372
220 .363
g/kW-hr

lb/hp-hr
BSFC

BSFC
215 .354
209 .345

1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300

Engine Speed - rpm Engine Speed - rpm

Maximum Power Maximum Power

Metric Prop Demand 216 kW English Prop Demand 290 hp

Performance Data Performance Data

Engine Engine Engine Fuel Engine Engine Engine Fuel

Speed Power Torque BSFC Rate Speed Power Torque BSFC Rate
rpm kW Nm g/kW-hr L/hr rpm hp lb ft lb/hp-hr gph
Maximum Maximum
Power 2200 216 938 226.0 58.2 Power 2200 290 692 .372 15.4
Data 2100 213 969 223.0 56.7 Data 2100 286 715 .367 15.0
2000 209 998 220.0 54.7 2000 280 736 .362 14.5
1900 206 1035 215.0 52.9 1900 276 763 .353 14.0
1800 200 1059 211.0 50.3 1800 268 781 .347 13.3
1700 189 1059 209.0 47.0 1700 253 781 .344 12.4
1600 178 1059 209.0 44.2 1600 238 781 .344 11.7
1500 166 1059 211.0 41.8 1500 223 781 .347 11.0
1400 155 1059 213.0 39.5 1400 208 781 .350 10.4
Prop Prop
Demand 2200 216 939 226.0 58.3 Demand 2200 290 693 .372 15.4
Data 2100 188 855 223.0 50.0 Data 2100 252 631 .367 13.2
2000 163 776 220.0 42.6 2000 218 572 .362 11.3
1900 139 700 218.0 36.2 1900 187 516 .358 9.6
1800 119 628 217.0 30.6 1800 159 463 .357 8.1
1700 100 561 217.0 25.8 1700 134 414 .357 6.8
1600 83 497 219.0 21.7 1600 112 367 .360 5.7
1500 69 436 222.0 18.1 1500 92 322 .365 4.8
1400 56 380 226.0 15.0 1400 75 280 .372 4.0

Cubic prop demand curve with 3.0 exponent for displacement Power produced at the flywheel will be within standard
hulls only. tolerances up to 50C (122F) combustion air temperature
measured at the air cleaner inlet, and fuel temperature
up to 52C (125F) measured at the fuel filter base.
Power rated in accordance with NMMA procedure as
crankshaft power. Reduce crankshaft power by 3% for
propeller shaft power.

PD-DM6054-00.pdf Created on 06/19/2001 11:49 2001 Caterpillar All Rights Reserved

3306B MARINE PROPULSION 216 bkW (290 bhp)
Right Side Front Footprint

03
03

03
H

01 01 01 01

L W

03
03

03
DIMENSIONS*
mm in.
Overall Length 1719.2 67.7
Length from rear face of block to front of engine 1285.0 50.6
Length from rear face of block to back of flywheel housing 149.8 5.9
Overall Height 1141.0 44.9
Height from crankshaft centerline to top of engine 827.7 32.6
Height from crankshaft centerline to bottom of oil pan 313.3 12.3
Overall Width 977.6 38.5
Width from crankshaft centerline to port side (left side) 434.8 17.1
Width from crankshaft centerline to starboard side 542.8 21.4
(right side)
Front
mm in.
Customer mounting hole diameter 19.8 0.8
Width from crankshaft centerline to mounting holes 307.8 12.1
Length from rear face of block to mounting holes 935.7 36.8
1018.3 40.1
*Illustrations and dimensions from drawing: 118-7821

RATING DEFINITIONS AND CONDITIONS

C Rating Engine Performance Parameters
Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +3%
Typical Application . . . Vessels such as ferries,
Specific Fuel Consumption . . . . . . . . . . . . . . . +3%
harbor tugs, fishing boats moving at higher
Fuel Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5%
speeds out and back (e.g. lobster, crayfish,
and tuna), offshore service boats, and also Ratings are based on SAE J1228/ISO8665
displacement hull yachts and short trip coastal standard conditions of 100 kPa (29.61 in. Hg),
freighters where engine load and speed 25C (77F), and 30% relative humidity. These
are cyclical. ratings also apply at ISO3046/1, DIN6271/3, and
Typical Hours Per Year . . . . . . . . . . . 2000 to 4000 BS5514 conditions of 100 kPa (29.61 in. Hg),
Time at Rated Speed . . . . . . . . . . . . . . . . Up to 50% 27C (81F), and 60% relative humidity.
Load Factor . . . . . . . . . . . . . . . . . . . . . . . . 20 to 80% Fuel rates are based on fuel oil of 35 API
Typical Time at Full Load . . . . . 6 out of 12 hours [16C (60F)] gravity having an LHV of
42 780 kJ/kg (18,390 Btu/lb) when used at 29C
Rated Speed . . . . . . . . . . . . . . . . . . . . . . . . 2200 rpm (85F) and weighing 838.9 g/L (7.001 lb/U.S. gal).
Maximum Cruise Speed. . . . . . . . . . . . . . . 2100 rpm
Additional ratings may be available for specific
Maximum Continuous Cruise Speed. . . . 2000 rpm
customer requirements. Consult your Caterpillar
representative for additional information.
 3306B MARINE PROPULSION 216 bkW (290 bhp)

Performance data is calculated in accordance with tolerances and conditions stated in this specification sheet and is only intended for purposes of
comparison with other manufacturers engines. Actual engine performance may vary according to the particular application of the engine and
operating conditions beyond Caterpillars control.
TMI Reference No.: DM6054-00 (6-19-01)
Materials and specifications are subject to change without notice. The International System of Units (SI) is used in this publication.
LEHM1235-00 (6-01) Printed in U.S.A. 2001 Caterpillar
Supersedes LEHM7240-01 All rights reserved.
 Marine
Propulsion 3306B
Engine
250 bkW (335 bhp) 340 mhp @ 2200 rpm

SPECIFICATIONS
I-6, 4-Stroke-Cycle-Diesel
Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . IMO compliant
Displacement . . . . . . . . . . . . . . . . . . . . 10.5 L (641 cu. in.)
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 mm (4.8 in.)
Stroke. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 mm (6.0 in.)
Aspiration . . . . . . . . . . . . . . . . Turbocharged-Aftercooled
Governor . . . . . . . . . . . . . . . . . . . . . . . . Hydra-mechanical
Engine Weight, Net Dry (approx) . 1120.9 kg (2469 lb)
Capacity for Liquids
Cooling System . . . . . . . . . . . . . . . 18.2 L (4.8 U.S. gal)
Lube Oil System (refill) . . . . . . . . 27.4 L (7.2 U.S. gal)
Oil Change Interval . . . . . . . . . . . . . . . . . . . . . . . . . . 250 hr
Caterpillar DEO 10W30 or 15W40
Shown with
Accessory Equipment
Rotation (from flywheel end) . . . . . . . Counterclockwise

STANDARD EQUIPMENT ACCESSORY EQUIPMENT

Air Inlet System Air Cleaner Rain Cap
Dry, regular duty air cleaner Air Starting Motor
Cooling System 12V 51 Amp, 24V 35 Amp, 24V 60 Amp Alternator
Gear driven, self-priming auxiliary sea water pump
Auxiliary Drive Pulley
with rotary rubber impeller; gear driven centrifugal
jacket water pump; engine oil cooler; expansion Digital Tachometer
tank; engine mounted heat exchanger with Double Wall Fuel Lines and Drain
removable tube bundle and replaceable copper-
nickel tubes; thermostats and housing Duplex Fuel Filter

Exhaust System Electric Overspeed Shutoff

Watercooled manifold and turbocharger; dry elbow Electric Starting Motor
and flange, 152 mm (6 in.) Engine-Mounted Instrument Panel
Flywheel and Flywheel Housing Ether Starting Aid
SAE No. 1 (156 teeth)
Exhaust Elbow, Pipe, Rain Cap, Flexible Fittings
Fuel System
Front Enclosed Clutch
Fuel priming pump, fuel transfer pump, fuel filter,
flexible fuel lines Fuel Ratio Control
Instruments Hydraulic Pump Drive
Fuel pressure gauge, service meter, heavy-duty Magnetic Pickup
standard SAE rotation tachometer drive
Manual Shutoff Lever
Lube System
Manual Sump Pump
Top-mounted crankcase breather, oil filter, LH oil
filler and oil level gauge, oil pan Pilot House Instrument Panel

Mounting System Primary Fuel Filter/Water Separator

Front support Remote-Mounted Pilot House Controls
General Remote Positive Locking Governor Control
Vibration damper and guard, Caterpillar yellow RH Oil Level Gauge
paint, lifting eyes
Shutoff Solenoid ETR
Spare Parts Kit
 3306B MARINE PROPULSION 250 bkW (335 bhp)

PERFORMANCE CURVES
D Rating DM6053-00 IMO Compliant
Engine Power

Engine Power
400 400
300 300
kW

hp
200 200
100 100

1600 1200
1100 800
Torque

Torque
Nm

lb ft
600 400
100 0

231 .380
224 .368
g/kW-hr

lb/hp-hr
BSFC

BSFC
217 .356
210 .344

1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300

Engine Speed - rpm Engine Speed - rpm

Maximum Power Maximum Power

Metric Prop Demand 250 kW English Prop Demand 335 hp

Performance Data Performance Data

Engine Engine Engine Fuel Engine Engine Engine Fuel

Speed Power Torque BSFC Rate Speed Power Torque BSFC Rate
rpm kW Nm g/kW-hr L/hr rpm hp lb ft lb/hp-hr gph
Maximum Maximum
Power 2200 250 1085 231.0 68.7 Power 2200 335 800 .380 18.1
Data 2100 245 1114 228.0 66.6 Data 2100 329 822 .375 17.6
2000 240 1145 224.0 64.1 2000 322 844 .368 16.9
1900 235 1181 219.0 61.3 1900 315 871 .360 16.2
1800 227 1204 214.0 57.8 1800 304 888 .352 15.3
1700 214 1204 211.0 53.8 1700 288 888 .347 14.2
1600 202 1204 210.0 50.5 1600 271 888 .345 13.3
1500 189 1204 212.0 47.7 1500 254 888 .349 12.6
1400 177 1205 215.0 45.2 1400 237 889 .353 11.9
Prop Prop
Demand 2200 250 1085 231.0 68.7 Demand 2200 335 800 .380 18.1
Data 2100 217 989 224.0 58.0 Data 2100 292 729 .368 15.3
2000 188 897 219.0 49.0 2000 252 662 .360 12.9
1900 161 809 216.0 41.4 1900 216 597 .355 10.9
1800 137 726 214.0 34.9 1800 184 535 .352 9.2
1700 115 648 214.0 29.4 1700 155 478 .352 7.8
1600 96 574 215.0 24.7 1600 129 423 .353 6.5
1500 79 504 218.0 20.6 1500 106 372 .358 5.4
1400 64 439 221.0 17.0 1400 86 324 .363 4.5

Cubic prop demand curve with 3.0 exponent for displacement Power produced at the flywheel will be within standard
hulls only. tolerances up to 50C (122F) combustion air temperature
measured at the air cleaner inlet, and fuel temperature
up to 52C (125F) measured at the fuel filter base.
Power rated in accordance with NMMA procedure as
crankshaft power. Reduce crankshaft power by 3% for
propeller shaft power.

PD-DM6053-00.pdf Created on 06/19/2001 11:49 2001 Caterpillar All Rights Reserved

3306B MARINE PROPULSION 250 bkW (335 bhp)
Right Side Front Footprint

03
03

03
H

01 01 01 01

L W

03
03

03
DIMENSIONS*
mm in.
Overall Length 1719.2 67.7
Length from rear face of block to front of engine 1285.0 50.6
Length from rear face of block to back of flywheel housing 149.8 5.9
Overall Height 1141.0 44.9
Height from crankshaft centerline to top of engine 827.7 32.6
Height from crankshaft centerline to bottom of oil pan 313.3 12.3
Overall Width 977.6 38.5
Width from crankshaft centerline to port side (left side) 434.8 17.1
Width from crankshaft centerline to starboard side 542.8 21.4
(right side)
Front
mm in.
Customer mounting hole diameter 19.8 0.8
Width from crankshaft centerline to mounting holes 307.8 12.1
Length from rear face of block to mounting holes 935.7 36.8
1018.3 40.1
*Illustrations and dimensions from drawing: 118-7821

RATING DEFINITIONS AND CONDITIONS

D Rating Engine Performance Parameters
Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +3%
Typical Application . . . Planing hull vessels such
Specific Fuel Consumption . . . . . . . . . . . . . . . +3%
as offshore patrol boats, customs, police, and
Fuel Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5%
some fire and fishing boats. Also used for bow
and stern thrusters. Ratings are based on SAE J1228/ISO8665
Typical Hours Per Year . . . . . . . . . . . 1000 to 3000 standard conditions of 100 kPa (29.61 in. Hg),
Time at Rated Speed . . . . . . . . . . . . . . . . Up to 16% 25C (77F), and 30% relative humidity. These
ratings also apply at ISO3046/1, DIN6271/3, and
Load Factor . . . . . . . . . . . . . . . . . . . . . . . . Up to 50%
BS5514 conditions of 100 kPa (29.61 in. Hg),
Typical Time at Full Load . . . . . 2 out of 12 hours 27C (81F), and 60% relative humidity.
Rated Speed . . . . . . . . . . . . . . . . . . . . . . . . 2200 rpm Fuel rates are based on fuel oil of 35 API
Maximum Cruise Speed. . . . . . . . . . . . . . . 2050 rpm [16C (60F)] gravity having an LHV of
Maximum Continuous Cruise Speed. . . . 1900 rpm 42 780 kJ/kg (18,390 Btu/lb) when used at 29C
(85F) and weighing 838.9 g/L (7.001 lb/U.S. gal).
Additional ratings may be available for specific
customer requirements. Consult your Caterpillar
representative for additional information.
 3306B MARINE PROPULSION 250 bkW (335 bhp)

Performance data is calculated in accordance with tolerances and conditions stated in this specification sheet and is only intended for purposes of
comparison with other manufacturers engines. Actual engine performance may vary according to the particular application of the engine and
operating conditions beyond Caterpillars control.
TMI Reference No.: DM6053-00 (6-19-01)
Materials and specifications are subject to change without notice. The International System of Units (SI) is used in this publication.
LEHM1234-00 (6-01) Printed in U.S.A. 2001 Caterpillar
Supersedes LEHM7240-01 All rights reserved.
 Marine
Propulsion 3306B
Engine
265 bkW (355 bhp) 360 mhp @ 2200 rpm

SPECIFICATIONS
I-6, 4-Stroke-Cycle-Diesel
Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . IMO compliant
Displacement . . . . . . . . . . . . . . . . . . . . 10.5 L (641 cu. in.)
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 mm (4.8 in.)
Stroke. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 mm (6.0 in.)
Aspiration . . . . . . . . . . . . . . . . Turbocharged-Aftercooled
Governor . . . . . . . . . . . . . . . . . . . . . . . . Hydra-mechanical
Engine Weight, Net Dry (approx) . . 1120.9 kg (2469 lb)
Capacity for Liquids
Cooling System . . . . . . . . . . . . . . . 18.2 L (4.8 U.S. gal)
Lube Oil System (refill) . . . . . . . . 27.4 L (7.2 U.S. gal)
Oil Change Interval . . . . . . . . . . . . . . . . . . . . . . . . . . 250 hr
Caterpillar DEO 10W30 or 15W40
Shown with
Accessory Equipment Rotation (from flywheel end) . . . . . . . Counterclockwise

STANDARD EQUIPMENT ACCESSORY EQUIPMENT

Air Inlet System Air Cleaner Rain Cap
Dry, regular duty air cleaner Air Starting Motor
Cooling System 12V 51 Amp, 24V 35 Amp, 24V 60 Amp Alternator
Gear driven, self-priming auxiliary sea water pump
Auxiliary Drive Pulley
with rotary rubber impeller; gear driven centrifugal
jacket water pump; engine oil cooler; expansion Digital Tachometer
tank; engine mounted heat exchanger with Double Wall Fuel Lines and Drain
removable tube bundle and replaceable copper-
nickel tubes; thermostats and housing Duplex Fuel Filter

Exhaust System Electric Overspeed Shutoff

Watercooled manifold and turbocharger; dry elbow Electric Starting Motor
and flange, 152 mm (6 in.) Engine-Mounted Instrument Panel
Flywheel and Flywheel Housing Ether Starting Aid
SAE No. 1 (156 teeth)
Exhaust Elbow, Pipe, Rain Cap, Flexible Fittings
Fuel System
Front Enclosed Clutch
Fuel priming pump, fuel transfer pump, fuel filter,
flexible fuel lines Fuel Ratio Control
Instruments Hydraulic Pump Drive
Fuel pressure gauge, service meter, heavy-duty Magnetic Pickup
standard SAE rotation tachometer drive
Manual Shutoff Lever
Lube System
Manual Sump Pump
Top-mounted crankcase breather, oil filter, LH oil
filler and oil level gauge, oil pan Pilot House Instrument Panel

Mounting System Primary Fuel Filter/Water Separator

Front support Remote-Mounted Pilot House Controls
General Remote Positive Locking Governor Control
Vibration damper and guard, Caterpillar yellow RH Oil Level Gauge
paint, lifting eyes
Shutoff Solenoid ETR
Spare Parts Kit
 3306B MARINE PROPULSION 265 bkW (355 bhp)

PERFORMANCE CURVES
E Rating DM6052-00 IMO Compliant
Engine Power

Engine Power
400 500
300 300
kW

hp
200 100
100 -100

1700 1300
1200 900
Torque

Torque
Nm

lb ft
700 500
200 100

236 .388
228 .374
g/kW-hr

lb/hp-hr
BSFC

BSFC
219 .360
211 .346

1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300

Engine Speed - rpm Engine Speed - rpm

Maximum Power Maximum Power

Metric Prop Demand 265 kW English Prop Demand 355 hp

Performance Data Performance Data

Engine Engine Engine Fuel Engine Engine Engine Fuel

Speed Power Torque BSFC Rate Speed Power Torque BSFC Rate
rpm kW Nm g/kW-hr L/hr rpm hp lb ft lb/hp-hr gph
Maximum Maximum
Power 2200 265 1150 236.0 74.4 Power 2200 355 848 .388 19.7
Data 2100 262 1191 233.0 72.7 Data 2100 351 878 .383 19.2
2000 259 1237 228.0 70.4 2000 347 912 .375 18.6
1900 255 1279 222.0 67.4 1900 341 943 .365 17.8
1800 247 1311 216.0 63.7 1800 332 967 .355 16.8
1700 233 1311 212.0 59.1 1700 313 967 .349 15.6
1600 220 1311 211.0 55.4 1600 295 967 .347 14.6
1500 206 1311 213.0 52.3 1500 276 967 .350 13.8
1400 192 1311 216.0 49.5 1400 258 967 .355 13.1
Prop Prop
Demand 2200 265 1150 236.0 74.4 Demand 2200 355 848 .388 19.7
Data 2100 231 1048 226.0 62.0 Data 2100 309 773 .372 16.4
2000 199 951 219.0 52.0 2000 267 701 .360 13.7
1900 171 858 215.0 43.8 1900 229 633 .353 11.6
1800 145 770 213.0 36.9 1800 195 568 .350 9.7
1700 122 687 213.0 31.0 1700 164 507 .350 8.2
1600 102 608 214.0 26.0 1600 137 448 .352 6.9
1500 84 535 216.0 21.7 1500 113 395 .355 5.7
1400 68 466 219.0 17.9 1400 92 344 .360 4.7

Cubic prop demand curve with 3.0 exponent for displacement Power produced at the flywheel will be within standard
hulls only. tolerances up to 50C (122F) combustion air temperature
measured at the air cleaner inlet, and fuel temperature
up to 52C (125F) measured at the fuel filter base.
Power rated in accordance with NMMA procedure as
crankshaft power. Reduce crankshaft power by 3% for
propeller shaft power.

PD-DM6052-00.pdf Created on 06/19/2001 11:49 2001 Caterpillar All Rights Reserved

3306B MARINE PROPULSION 265 bkW (355 bhp)
Right Side Front Footprint

03
03

03
H

01 01 01 01

L W

03
03

03
DIMENSIONS*
mm in.
Overall Length 1719.2 67.7
Length from rear face of block to front of engine 1285.0 50.6
Length from rear face of block to back of flywheel housing 149.8 5.9
Overall Height 1141.0 44.9
Height from crankshaft centerline to top of engine 827.7 32.6
Height from crankshaft centerline to bottom of oil pan 313.3 12.3
Overall Width 977.6 38.5
Width from crankshaft centerline to port side (left side) 434.8 17.1
Width from crankshaft centerline to starboard side 542.8 21.4
(right side)
Front
mm in.
Customer mounting hole diameter 19.8 0.8
Width from crankshaft centerline to mounting holes 307.8 12.1
Length from rear face of block to mounting holes 935.7 36.8
1018.3 40.1
*Illustrations and dimensions from drawing: 118-7821

RATING DEFINITIONS AND CONDITIONS

E Rating Engine Performance Parameters
Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +3%
Typical Application . . . Planing hull vessels such
Specific Fuel Consumption . . . . . . . . . . . . . . . +3%
as pleasure craft, harbor patrol, harbor master,
Fuel Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5%
and some fishing and pilot boats.
Typical Hours Per Year . . . . . . . . . . . . 250 to 1000 Ratings are based on SAE J1228/ISO8665
Time at Rated Speed . . . . . . . . . . . . . . . . . Up to 8% standard conditions of 100 kPa (29.61 in. Hg),
25C (77F), and 30% relative humidity. These
Load Factor . . . . . . . . . . . . . . . . . . . . . . . . Up to 30%
ratings also apply at ISO3046/1, DIN6271/3, and
Typical Time at Full Load . . . . 1/2 out of 6 hours BS5514 conditions of 100 kPa (29.61 in. Hg),
Rated Speed . . . . . . . . . . . . . . . . . . . . . . . . 2200 rpm 27C (81F), and 60% relative humidity.
Maximum Cruise Speed. . . . . . . . . . . . . . . 2050 rpm Fuel rates are based on fuel oil of 35 API
Maximum Continuous Cruise Speed. . . . 1900 rpm [16C (60F)] gravity having an LHV of
42 780 kJ/kg (18,390 Btu/lb) when used at 29C
(85F) and weighing 838.9 g/L (7.001 lb/U.S. gal).
Additional ratings may be available for specific
customer requirements. Consult your Caterpillar
representative for additional information.
 3306B MARINE PROPULSION 265 bkW (355 bhp)

Performance data is calculated in accordance with tolerances and conditions stated in this specification sheet and is only intended for purposes of
comparison with other manufacturers engines. Actual engine performance may vary according to the particular application of the engine and
operating conditions beyond Caterpillars control.
TMI Reference No.: DM6052-00 (6-19-01)
Materials and specifications are subject to change without notice. The International System of Units (SI) is used in this publication.
LEHM1233-00 (6-01) Printed in U.S.A. 2001 Caterpillar
Supersedes LEHM7240-01 All rights reserved.