OPERATION &

MAINTENANCE MANUAL

350 Magnum MPI

Tournament Ski

1995, Brunswick Corporation 90-806906960 595

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 CC142
IDENTIFICATION RECORD
PLEASE RECORD THE FOLLOWING INFORMATION:
1.
Engine Model, Horsepower
2.
Engine Serial Number
3.
Transmission Models Transmission Serial Number
4.
Propeller Number Pitch Diameter
5.
Hull Identification Number (HIN) Purchase Date
6.
Boat Manufacturer Boat Model Length

Serial Numbers
The serial numbers are the manufacturer’s keys to numerous engineering details which apply to your MerCruiser
power package. When contacting your Authorized MerCruiser Dealer about service, always specify model and
serial numbers.

5 1
2

74192

(NOTE: The numbers seen on illustrations are reference for numbered items above)

0
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 CC354
Table of Contents
Page
Welcome! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Read This Manual Thoroughly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Lanyard Stop Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Safe Boating Suggestions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Protecting People In The Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
While You Are Cruising . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
While Boat Is Stationary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
High-Speed And High-Performance
Boat Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Conditions Affecting Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Weight Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Bottom Of Boat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
How Elevation and Climate
Affect Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Important Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Operation And Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Launching And Boat Operation Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Freezing Temperature Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Attention Required After Submersion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Stolen Power Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Replacement Service Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Do-It-Yourself Maintenance Suggestions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Diagnosing EFI Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
20-Hour Break-In Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
After Break-In Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
20-Hour Checkup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Instrumentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Audio Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Electrical System Overload Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Remote Controls (Panel Mounted) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Starting, Shifting And Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Operation Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Fuel Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Seacock Size Recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Sea Strainer Recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Crankcase Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Engine Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Tune-up Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
EFI System Maintenance Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Maintenance Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Maintenance Schedules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Checking Fluid Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Changing Fluids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Flushing Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

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Seawater Pump Impeller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Drive Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Sight Tube Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Water Separating Fuel Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
In-Line Fuel Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Engine Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Miscellaneous Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Bottom Of Boat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Antifouling Paints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Inspection And Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Cold Weather or Extended Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Power Package Layup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Draining Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Battery Winter Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Power Package Recommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Water Flow Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Quicksilver Instrumentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Starting And Charging System Harness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
E.F.I. System Harness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Owner Warranty Registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
International Owner Registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Warranty Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
MerCruiser Limited Warranty -
Gasoline Engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
MerCruiser International Warranty -
Gasoline Engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
3 Year Limited Warranty Against
Corrosion Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Warranty Coverage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Warranty Does Not Apply To
The Following: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Transferable Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Direct Sale By Owner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Q-Guard Product Protection Plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
United States and Canada Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Owner Service Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Local Repair Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Service Away From Home . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Parts and Accessories Inquiries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Resolving a Problem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Service Centers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Customer Service Literature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
General Maintenance Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Engine Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Literature Order Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

The description and specifications contained herein were in effect at the time this guide was approved for printing. Mercury Marine, whose
policy is one of continuous improvement, reserves the right to discontinue models at any time, or to change specifications or designs,
without notice and without incurring obligation.

Mercury Marine Printed in

Fond du Lac, Wisconsin, U.S.A.
1995, Brunswick Corporation U.S.A.
The following are registered trademarks of Brunswick Corporation: Auto-
blend, Jet-Prop, Mariner, Merc, MerCathode, MerCruiser, Mercury, Mer-
cury Marine, Quicksilver, Ride-Guide, and Thruster.

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 CA165
Welcome!
You have selected one of the finest marine power packages available. It incorporates numerous design features
to assure operating ease and durability.
With proper care and maintenance, you will thoroughly enjoy using this product for many boating seasons. To en-
sure maximum performance and carefree use, we ask that you thoroughly read this manual.
The Operation and Maintenance Manual contains specific instructions for using and maintaining your product. We
suggest that this manual remain with the product for ready reference whenever you are on the water.
Thank you for purchasing one of our MerCruiser products. We sincerely hope your boating will be pleasant!
CONSUMER AFFAIRS DEPARTMENT
CA166
Read This Manual Thoroughly
IF YOU DON’T UNDERSTAND ANY PORTION, CONTACT YOUR DEALER FOR A DEMONSTRATION OF AC-
TUAL STARTING AND OPERATING PROCEDURES.
NOTICE
Throughout this publication, and on your power package, WARNINGS and CAUTIONS, accompanied by the Inter-
national Hazard Symbol ! , may be used to alert the installer/user to special instructions concerning a particular
service or operation that may be hazardous if performed incorrectly or carelessly. Observe them carefully.
These “Safety Alerts” alone cannot eliminate the hazards that they signal. Strict compliance with these special in-
structions while performing the service, plus ”common sense” operation, are major accident prevention measures.

! WARNING
WARNING-Hazards or unsafe practices which could result in severe personal injury or death.

! CAUTION
CAUTION-Hazards or unsafe practices which could result in minor personal injury or product or property
damage.

IMPORTANT: - Indicates information or instructions that are necessary for proper operation and /or main-
tenance.

! WARNING
The operator (driver) is responsible for the correct and safe operation of the boat, the equipment aboard
and the safety of all occupants aboard. We strongly recommend that the operator read this Operation and
Maintenance Manual and thoroughly understand the operational instructions for the power package and
all related accessories before the boat is used.

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 CA280
Lanyard Stop Switch

2 1

74608

1 Some boats come equipped with a lanyard stop switch. A lanyard stop switch can also be installed as an acces-
sory. The purpose of this switch is to turn off the engine ignition whenever the operator (when attached to the lan-
yard) moves far enough away from the operator’s position to activate the switch.
2 The lanyard is a cord usually between 4 and 5 feet (1220 and 1524 mm) in length when stretched out with an
element on one end made to be inserted into the switch and a metal snap on the other end for attaching to the
operator. It is coiled to make its at rest condition as short as possible so as to minimize the likelihood of lanyard
entanglement with nearby objects. It is made as long as it is in its stretched condition to minimize the likelihood
of accidental activation should the operator choose to move around in an area close to the normal operator’s posi-
tion. If for any reason it is desired to have a shorter functional lanyard, this may be accomplished by using up length
in the way the lanyard and clip are attached to the operator (such as wrapping the lanyard around the operator’s
wrist or leg) or by tying a simple knot in the lanyard.
Read the Safety Warning on this page and the following page before electing to install, use, or not to use
such a switch.

! WARNING
The following advantages and disadvantages of a lanyard stop switch should be considered before elect-
ing to use, or not to use, such a switch.
ADVANTAGES: The purpose of a lanyard stop switch is to stop the engine ignition whenever the operator
(when attached to the lanyard) moves far enough away from the operator’s position to activate the switch.
This would occur if the operator falls or moves within the boat a sufficient distance from the operator’s
position. This type of accident is most likely in certain types of boats such as low-sided boats, and high-
performance boats, It is also likely as a result of poor operating practices such as sitting on the back of
the seat at planing speeds, standing at planing speeds, operating at high speeds in shallow or obstacle-in-
fested waters, releasing your grip on a steering wheel that is pulling in one direction, drinking and driving,
or daring, high-speed boat maneuvers.

DISADVANTAGES: Inadvertent activation of the switch is also a possibility. This could cause any, or all,
of the following potentially hazardous situations:
1. Loss of balance and falling forward of unstable boat passengers - a particular concern in bow rider type
boats.
2. Loss of power and directional control in heavy seas, strong current or high winds.
3. Loss of control when docking.

While activation of the lanyard stop switch will result in immediate power shut-down, a boat can continue
to coast for some distance depending upon the velocity and degree of any turn at shut-down. However,
the boat will not complete a full circle. While the boat is coasting, it can cause injury to anyone in the boat’s
path as seriously as the boat would when under power.
As we cannot possibly know of and advise the boating public of all conceivable boat/motor types and/or
poor operating practices, the final decision of whether to use a lanyard stop switch rests with you, the own-
er/driver.
We strongly recommend that other occupants be instructed on proper starting and operating procedures
should they be required to operate the engine and boat in an emergency.
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 CA281
Safe Boating Suggestions
In order to safely enjoy the waterways, familiarize yourself with local and other governmental boating regulations
and restrictions, and consider the following suggestions.
• Know and obey all nautical rules and laws of the waterways. Boat operators should complete a boating
safety course. Courses are offered in the U.S.A. by (1) The U.S. Coast Guard Auxiliary, (2) The Power Squad-
ron, (3) The Red Cross and (4) your state or provincial boating law enforcement agency. Inquiries may be made
to the Boating Hotline, 1-800-368-5647 or the Boat U.S. Foundation information number 1-800-336-BOAT.
We strongly recommend that all powerboat operators attend one of these courses.
You should also review the NMMA Sources of Waterway Information booklet. It lists regional sources of safety,
cruising and local navigation and is available at no charge by writing to:
Sources of Waterway Information
National Marine Manufacturers Association
410 N. Michigan Avenue
Chicago, IL 60611 U.S.A.
• Perform safety checks and required maintenance. Follow a regular schedule and ensure that all repairs are
properly made.
• Check safety equipment on board. Here are suggestions of the types of safety equipment to carry when boat-
ing:
(1) Approved fire extinguisher(s); paddle or oar.
(2) Signal devices: flashlight, rockets or flares, flag and whistle or horn.
(3) Spare propeller, thrust hubs and an appropriate wrench.
(4) Tools for necessary minor repairs; first aid kit and book.
(5) Anchor and extra anchor line; water-proof storage containers.
(6) Manual bilge pump and extra drain plugs; compass and map or chart of area.
(7) Spare operating equipment; batteries, bulbs, fuses, etc.
(8) Transistor radio
(9) Drinking water
• Know signs of weather change and avoid foul weather and rough-sea boating.
• Tell someone where you are going and when you expect to return.
• Passenger boarding. Stop the engine whenever passengers are boarding, unloading or are near the back
(stern) of the boat. Just shifting the drive unit into neutral is not sufficient.
• Use personal flotation devices. Federal Law requires that there be a U. S. Coast Guard approved, wearable-
type life jacket (personal flotation device), correctly sized and readily accessible for every person on board, plus
a throwable cushion or ring. We strongly advise that everyone wear a life jacket at all times while in the boat.
• Prepare other boat operators. Instruct at least one person on board in the basics of starting and operating
the engine and boat handling in case the driver becomes disabled or falls overboard.
• Do not overload your boat. Most boats are rated and certified for maximum load (weight) capacities (refer to
your boat capacity plate). When in doubt, contact your dealer or the boats manufacturer. Know your boat’s oper-
ating and loading limitations.
• Make sure everyone in the boat is properly seated. Don’t allow anyone to sit or ride on any part of the boat
that was not intended for such use. This includes backs of seats, gunwales, transom, bow, decks, raised fishing
seats, any rotating fishing seat; anywhere that sudden unexpected acceleration, sudden stopping, unexpected
loss of boat control or sudden boat movement could cause a person to be thrown overboard or into the boat.

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 • Never be under the influence of alcohol or drugs while boating (it is the law). They impair your judgment
and greatly reduce your ability to react quickly.
• Know your boating area and avoid hazardous locations.
• Be alert. The operator of the boat is responsible by law to “maintain a proper lookout by sight (and hearing).”
The operator must have an unobstructed view particularly to the front. No passengers, load, or fishing seats
should block the operators view when operating the boat above idle or planing transition speed. Watch “the other
guy,” the water and your wake.
• Never drive your boat directly behind a water skier in case the skier falls. As an example, your boat travel-
ing at 25 miles per hour (40 km/hr) in 5 seconds will overtake a fallen skier who was 200 feet in front of you.
• Watch fallen skiers. When using your boat for water skiing or similar activities, always keep a fallen or down
skier on the operator’s side of the boat while returning to attend the skier. The operator should always have the
down skier in sight and never back up to the skier or anyone in the water.
• Report accidents. Boat operators are required by law to file a Boating Accident Report with their state boating
law enforcement agency when their boat is involved in certain boating accidents. A boating accident must be
reported if (1) there is loss of life or probable loss of life, (2) there is personal injury requiring medical treatment
beyond first aid, (3) there is damage to boats or other property where the damage value exceeds $500.00 or
(4) there is complete loss of the boat. Seek further assistance from local law enforcement.

CA282
Protecting People In The Water
While You Are Cruising
It is very difficult for a person standing or floating in the water to take quick action to avoid a boat heading in his/her
direction even at slow speed.
Always slow down and exercise extreme caution any time you are boating in an area where there might be people
in the water.
Whenever a boat is moving (coasting) and the drive unit is in neutral position, there is sufficient force by the water
on the propeller to cause the propeller to rotate. This neutral propeller rotation can cause serious injury.
While Boat Is Stationary
Shift the drive unit into neutral and shut off the engine before allowing people to swim or be in the water near your
boat.

! WARNING
Stop your engine immediately whenever anyone in the water is near your boat. Serious injury to the person
in the water is likely if contacted by a rotating propeller, a moving boat, a moving gear case, or any solid
device rigidly attached to a moving boat or gear case.

CA283
High-Speed And High-Performance Boat Operation
If your boat is considered a high-speed or high-performance boat with which you are unfamiliar, we recommend
that you never operate it at its high speed capability without first requesting an initial orientation and familiarization
demonstration ride with your dealer or an operator experienced with your boat. For additional information, obtain
a copy of our “Hi-Performance Boat Operation” booklet (Part Number 90-86168--3) from your dealer, distributor,
or Mercury Marine.

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 CA7
Conditions Affecting Operation
Weight Distribution
Positioning of weight (passengers and gear) inside the boat has the following effects:
Shifting weight to rear (stern) will:
• Generally increases speed and engine RPM.
• At extremes can cause boat to porpoise.
• Causes bow to bounce in choppy water.
• Increases danger of following wave splashing into boat when coming off plane.
Shifting weight to front (bow) will:
• Improve ease of planing.
• Improve rough water ride.
• At extremes, can cause boat to veer back and forth (bow steer).

CA8
Bottom Of Boat
To maintain maximum speed, the following conditions of the boat bottom should be observed.
• Clean, free of barnacles and marine growth.
• Free of distortion; nearly flat where it contacts the water.
• Straight and smooth, fore and aft.
Marine vegetation may accumulate when boat is docked. This growth must be removed before operation; it may
clog water inlets and cause engine to overheat.

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 CA12
How Elevation and Climate Affect Performance
Elevation has a very noticeable effect on the wide-open-throttle power of an engine. Since air (containing oxygen)
gets thinner as elevation increases, the engine begins to starve for air. Humidity, barometric pressure and tempera-
ture do have a noticeable effect on the density of air. Heat and humidity thin the air. This condition can become
particularly annoying when the propeller testing was done on a cool, dry day. Then later; on a hot, sultry day, the
boat doesn’t seem to have the same performance.
Although some performance can be regained by dropping to a lower pitch propeller, the basic problem still exists.
In some cases, a gear ratio change to more reduction is possible and very beneficial.
Summer conditions of high temperature, low barometric pressure and high humidity all combine to reduce the en-
gine power. This, in turn, is reflected in decreased boat speeds, as much as 2 or 3 miles per hour in some cases.
Nothing will regain this speed for the boater, but the coming of cool, dry weather.
In pointing out the practical consequences of weather effects, an engine running on a hot, humid, summer day,
may encounter a loss of as much as 14% of the horsepower it would produce on a dry, brisk spring or fall day. With
the drop in available horsepower, this propeller will, in effect, become too large. Consequently, the engine operates
at less than its recommended RPM. This will result in further loss of horsepower at the propeller with another de-
crease in boat speed. This secondary loss, however, can be somewhat regained by switching to a lower-pitch pro-
peller that allows the engine to again run at recommended RPM.
For boaters to realize optimum engine performance under changing weather conditions, it is essential that the en-
gine be propped to allow it to operate at or near the top end of the recommended maximum RPM range at
wide-open-throttle with a normal boat load.
Not only does this allow the engine to develop full power, but equally important is the fact that the engine also will
be operating in an RPM range that discourages damaging detonation. This, of course, enhances overall reliability
and durability of the engine.

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 CA13
Important Information
Operation And Maintenance
OWNER/OPERATOR RESPONSIBILITIES
It is the operator’s responsibility to perform all safety checks; to ensure that all lubrication and maintenance instruc-
tions are complied with for safe operation and to return the unit to an Authorized MerCruiser Dealer for a periodic
checkup.
Normal maintenance service and replacement parts are the responsibility of the owner/operator and as such, are
not considered defects in workmanship or material within the terms of the warranty. Individual operating habits
and usage contribute to the need for maintenance service.
Proper maintenance and care of your power package will assure optimum performance and dependability, and
will keep your overall operating expenses at a minimum. See your Authorized MerCruiser Dealer for service aids.
CA14
DEALER RESPONSIBILITIES
In general, a dealer’s responsibilities to the customer include predelivery inspection and preparation such as:
• Make sure that the boat is properly equipped.
• Prior to delivery, make certain that the MerCruiser power package and other equipment are in proper operating
condition.
• Make all necessary adjustments for maximum efficiency.
• Familiarize the customer with the on-board equipment.
• Explain and demonstrate the operation of the power package and boat.
• At the time of delivery, the dealer should provide you with a copy of a Predelivery Inspection Checklist.
• Your selling dealer should fill out the Warranty Registration Card completely and mail it to the factory immediate-
ly upon sale of the new product.
CA20
Launching And Boat Operation Care

! CAUTION
During launching from a trailer, if the unloading ramp is steep or the trailer bed must be tilted, the boat
may enter the water rapidly and at a steep angle. This may force water through the exhaust system into
the cylinders. The more weight on the transom, the more likely this is to occur.

Slowing down rapidly or stopping suddenly may cause a following wave to “swamp” the transom. In this
instance, water may enter the cylinders through the exhaust system.

When backing up rapidly, the same situation may occur as stated in the preceding paragraph.

In any of these situations, water entering the engine could cause severe damage to internal parts. Refer to “Atten-
tion Required After Submersion”.

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 CA15
Freezing Temperature Operation
IMPORTANT: It boat is operated during periods of freezing temperature, precautions must be taken to pre-
vent freezing damage to power package. Refer to “COLD WEATHER or EXTENDED STORAGE” for draining
instructions.
CA18
Attention Required After Submersion
• Before recovery, contact a MerCruiser Dealer.
• After recovery, immediate service by an Authorized MerCruiser Dealer is required to prevent serious damage
to power package.
CA21
Stolen Power Package
If your power package is stolen, immediately advise the local authorities and Mercury Marine of the model and
serial number(s) and to whom the recovery is to be reported. This “Stolen Motor” information is placed into a file
at Mercury Marine to aid authorities and dealers in recovery of stolen motors.
CA22
Replacement Service Parts

! WARNING
Electrical, ignition and fuel system components on MerCruiser gasoline power packages are designed
and manufactured to comply with U.S. Coast Guard rules and regulations to minimize risks of fire or explo-
sion.

Use of replacement electrical, ignition or fuel system components, which do not comply to these rules and
regulations, could result in a fire or explosion hazard and should be avoided.

When servicing the electrical, ignition and fuel systems, it is extremely important that all components are
properly installed and tightened. If not, any electrical or ignition component would permit sparks to ignite
fuel vapors from fuel system leaks, if they existed.

Marine engines are expected to operate at or near full–throttle for most of their life. They are also expected to oper-
ate in both fresh and saltwater environments. These conditions require numerous special parts. Care should be
exercised when replacing marine engine parts as specifications are quite different from those of the standard auto-
motive engine.
For example, one of the most important, and probably the least suspected special replacement part, is the cylinder
head gasket. Since saltwater is highly corrosive, the steel-type automotive head gasket cannot be used. A marine
engine head gasket uses special materials to resist corrosive action.
Since marine engines must be capable of running at or near maximum RPM much of the time, special valve
springs, valve lifters, pistons, bearings, camshafts and other heavy-duty moving parts are required for long life and
peak performance.
These are but a few of the many special modifications that are required in MerCruiser marine engines to provide
long life and dependable performance.

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 CB166
Do-It-Yourself Maintenance Suggestions
If you are one of those persons who likes to do-it-yourself, here are some suggestions for you.
• Present-day marine equipment, such as your MerCruiser power package, are highly technical pieces of machin-
ery. Electronic ignition and electronic fuel injection systems provide greater fuel economies, but also are more
complex for the untrained mechanic.
• Do not attempt any repairs which are not covered in this manual unless you are aware of the precautions (“Cau-
tions” and “Warnings”) and procedures required. Your safety is of our concern.
• If you attempt to service the product yourself, we suggest you order the service manual for that model. The ser-
vice manual outlines the correct procedures to follow. It is written for the trained mechanic, so there may be
procedures you don’t understand. Do not attempt repairs if you do not understand the procedures.
• There are special tools and equipment that are required to perform some repairs. Do not attempt these repairs
unless you have these special tools and/or equipment. You can cause damage to the product in excess of the
cost a dealer would charge you.
• Also, if you partially disassemble an engine or drive assembly and are unable to repair it, the dealer’s mechanic
must reassemble the components and test to determine the problem. This will cost you more than taking it to
the dealer immediately upon having a problem. It may be a very simple adjustment to correct the problem.
• Do not telephone the dealer, service office or the factory to attempt for them to diagnose a problem or request
the repair procedure. It is difficult for them to diagnose a problem over the telephone. A doctor can’t and won’t
diagnose your illness by telephone; he must examine you personally, just as a mechanic must examine your
power package.
• Your Authorized Dealer is there to service your power package. He has qualified factory-trained mechanics.
It is recommended you have the dealer do periodic maintenance checks on your power package. Have him winter-
ize it in the fall and service it before the boating season. This will reduce the possibility of any problems occurring
during your boating season when you want trouble-free boating pleasure.
CB129
Diagnosing EFI Problems
Your Authorized MerCruiser Dealer has the proper service tools for diagnosing problems on the Electronic Fuel
Injection (EFI) System. The Electronic Control Module (ECM) on this engine has the ability to detect some prob-
lems with the system when they occur, and store a “Trouble Code” in the ECM’s memory. This code can then be
read later by a service technician using a special diagnostic tool.

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 CA24
20-Hour Break-In Period
IMPORTANT: The first 20 hours of operation is the engine break-in period. Correct break-in is essential
to obtain minimum oil consumption and maximum engine performance. During this break-in period, the
following rules must be observed:
• Do not operate below 1500 RPM for extended periods of time for first 10 hours. Shift into gear as soon as possi-
ble after starting and advance throttle above 1500 RPM if conditions permit safe operation.
• Do not operate at one speed consistently for extended periods.
• Do not exceed 3/4 throttle during first 10 hours. During next 10 hours, occasional operation at full throttle is per-
missible (5 minutes at a time maximum).
• Avoid full throttle acceleration from IDLE speed.
• Do not operate at full throttle until engine reaches normal operating temperature.
• Frequently check crankcase oil level. Add oil if needed. It is normal for oil consumption to be high during break-in
period.
• After 20-hour break-in period, drain crankcase oil and replace oil filter (see MAINTENANCE). Fill crankcase with
correct oil (see SPECIFICATIONS).
CA211
After Break-In Period
To help extend the life of your MerCruiser power package, the following recommendations should be considered;
• Use a propeller that allows the engine to operate at or near the top of the maximum RPM range (See “Specifica-
tions” section) when at full throttle with a normal boat load.
• Operation at 3/4 throttle setting or lower is recommended. Refrain from prolonged operation at maximum (full
throttle) RPM.
CC196
20-Hour Checkup
After first 20 hours of operation, an Authorized MerCruiser Dealer should be contacted for the following mainte-
nance. The boat owner is responsible for any charges.
• Change crankcase oil and filter.
• Check all fluid levels.
• Cooling System - Inspect all hoses for damage and deterioration; check all hose clamps for adequate tightness.
• Inspect ignition system and timing.
• Check for loose, missing or damaged parts.
• Check shift and throttle cable adjustments - lubricate and inspect for loose, damaged or missing parts.
• Steering System - Lubricate and inspect for loose, damaged or missing parts.
• Inspect all drive belts.
• Check engine alignment.
• Complete Engine Exhaust System - Inspect externally for damage and deterioration; check all hose clamps for
adequate tightness.

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 CC93

Operation

1 70514 2 70515 3 70516

4 5 6 70519
70517 70518

7 70521 8 9 70523
70522

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 CC8
Instrumentation
The following is a brief explanation of instrumentation typically found on some boats. The owner/operator should
be familiar with all instruments and their functions on the boat.
1 Speedometer - indicates boat speed.
2 Tachometer - indicates engine RPM.
3 Oil Pressure Gauge - indicates engine oil pressure.
4 Battery Meter - indicates battery voltage.
5 Water Temperature Gauge - indicates engine operating temperature.
6 Fuel Gauge - indicates fuel tank volume.
7 Hour Meter - records engine running time.
8 Bilge Blower Switch - must be operated for five minutes to ventilate bilge.
9 Ignition Switch - allows operator to start and stop engine.

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 CC180

1 70516

2 70518

3 72957

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 CC336
Audio Warning
Warning buzzer will sound if:
1 Cooling system water temperature rises too high.
2 Engine oil pressure gets too low.
3 Transmission temperature is too high.

! CAUTION
Avoid engine damage. Do not operate engine once the buzzer has sounded EXCEPT TO AVOID A HAZ-
ARDOUS SITUATION. The Audio Warning System will not protect the engine from damage. It is designed
to warn the operator that a problem has occurred.

When the buzzer sounds with the engine running, stop engine immediately. Investigate cause and correct it, if pos-
sible. If cause cannot be determined, consult your Authorized MerCruiser Dealer.
IMPORTANT: Warning buzzer will sound for 2 seconds when ignition key is turned to RUN position and
engine is not started. This allows the operator to test the warning buzzer prior to starting the engine.

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 CC254

1
71583

3C 3B 3A

71585

4 70525
2
72852

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 CC255
Electrical System Overload Protection
If an electrical overload occurs, a fuse will blow or the circuit breaker will trip open. The cause must be found and
corrected before replacing fuse or resetting circuit breaker.
1 A circuit breaker provides protection for engine wiring harness and instrumentation power lead. Reset by push-
ing RESET button IN.
2 A 90 Amp fuse is located on the large post of the starter solenoid. This fuse is designed to protect the engine
wiring harness if an electrical overload occurs.
In an emergency, when engine must be operated and cause for high current draw cannot be located and corrected,
turn OFF or disconnect all accessories connected to engine and instrumentation wiring. Reset circuit breaker. If
breaker remains open, electrical overload has not been eliminated. Further checks must be made on electrical
system.
3 There are three fuses located in the fuel injection system electrical box. These fuses control various EFI circuits.
A. Fuel Pump Fuse - 15 Amp
B. ECM / Injector Fuse - 10 Amp
C. ECM / Battery Fuse - 15 Amp
4 A 20 amp fuse may be located in ignition switch “I” terminal lead to protect electrical system. Check for blown
fuse if key is turned to START and nothing happens (and circuit breaker is not tripped).

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 CC166

3 73866
4

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 CC167
Remote Controls (Panel Mounted)
1 Neutral Lock Bar - Prevents accidental shift and throttle engagement. Neutral lock bar must be pulled “Up” to
move the control handle out of neutral.
2 Throttle Only Button - Allows engine throttle advancement without shifting the engine. This is done by disen-
gaging the shift mechanism from the control handle. The throttle only button can be depressed only when the
remote control handle is in the “Neutral” position, and should only be used to assist in starting the engine.
3 Lanyard Stop Switch - Turns ignition “Off” whenever the operator (when attached to the lanyard) moves far
enough away from the operator’s position to activate the switch. See “Lanyard Stop Switch” at the front of this
manual for safety warning on the use of this switch.
4 Control Handle Tension Adjustment Screw - This screw can be adjusted to “Increase” or “Decrease” the ten-
sion on the control handle. This will help prevent “Creep” of the remote control handle. Turn screw “Clockwise” to
increase tension and “Counterclockwise” to decrease tension. Adjust to tension desired.
5 Control Handle - Operation of the shift and throttle are controlled by the movement of the control handle. “Push”
the control handle forward from “Neutral” with a quick firm motion to the first detent for “Forward” gear. Continue
pushing forward to increase speed. Pull the control handle back from “Neutral” with a quick firm motion to the first
detent for “Reverse” gear. Continue pushing back to increase speed.

! CAUTION
DO NOT shift the control handle into “Reverse” when the engine is not running. Forcing the shift mecha-
nism into “Reverse” when the engine is not running could damage the remote control mechanism.

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 CC97
Starting, Shifting And Stopping

! WARNING
Before starting engine, operate bilge blower for at least five minutes to remove any explosive fumes from
engine compartment. If boat is not equipped with a bilge blower, open engine hatch and leave open while
starting engine.

IMPORTANT: Observe the following:

• Do not start engine without water being supplied to seawater pickup pump (to prevent pump or engine
damage).
• Do not operate starter motor continuously for more than 30 seconds.
• Never shift unit unless engine is at Idle RPM.
Perform the following as appropriate:
1 Check all items listed in OPERATION CHART.
2 Perform any other necessary checks, as indicated by your dealer, or specified in your boat owner’s manual.
3 Place control handle in NEUTRAL.
FLOODED ENGINE - Turn ignition switch to ON position. Place the throttle lever at 50% position. Attempt to start
engine. As soon as engine starts, return throttle to the idle position.
4 Turn ignition key to START. Release key when engine starts and allow switch to return to RUN position.
5 Check oil pressure gauge immediately after engine starts. If oil pressure is not within specified range (see
SPECIFICATIONS), stop engine immediately and determine cause.
6 After engine has warmed up, check water temperature gauge to ensure that engine temperature is not abnor-
mally high. If it is, stop engine immediately and determine cause.
7 Be sure charging system is functioning correctly.
8 Observe power package for fuel, oil, water and exhaust leaks.
9 To shift unit into gear, move control/shift lever with a firm, quick motion forward to shift to FORWARD gear, or
backward to shift to REVERSE. After shifting unit, advance throttle to desired setting.
10 To shift unit out of gear, move control/shift lever to NEUTRAL and allow engine to drop to IDLE speed. If engine
has been run at high speed for a long period of time, allow engine to cool by running at IDLE speed for 3 to 5 min-
utes.
11 Turn ignition key to OFF.

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 CC98
Operation Chart
BEFORE AFTER WHILE AFTER
STARTING STARTING UNDERWAY STOPPING

Open engine Observe all gauges Observe all Turn ignition

hatch. to check condition of gauges to monitor key OFF.
engine. If not normal, engine condition.
stop engine. If not normal, stop
engine.

Check engine oil Check for fuel, oil, Turn battery

level. water, fluid and switch OFF, if so
exhaust leaks, etc. equipped.

Turn battery switch Check shift and Close fuel

ON, if so equipped. throttle control valve, if so
operation. equipped

Operate bilge Check steering Close seacock, if

blowers, if so operation so equipped.
equipped.

Open fuel Flush cooling

shutoff valve, system, if in a
if so equipped. saltwater area.

Open seacock, if
so equipped.

Perform all other

checks specified by
your dealer and\or
boat builder.

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 CA261
Specifications
Fuel Recommendations
IMPORTANT: Use of improper gasoline can damage your engine seriously. Engine damage resulting from
use of improper gasoline is considered misuse of engine, and damage caused thereby will not be covered
under the limited warranty.

FUEL RATINGS
MerCruiser engines will operate satisfactorily when using a major brand of unleaded gasoline as follows:
USA and Canada - having a posted pump Octane Rating of
87 (R+M)/2 minimum. Premium gasoline [92 (R+M)/2 Octane] is also acceptable. DO NOT use leaded gasoline.
Outside USA and Canada - having a posted pump Octane Rating of 90 RON minimum. Premium gasoline (98
RON) is also acceptable. If unleaded gasoline is not available, use a major brand of leaded gasoline.

CA291
USING REFORMULATED (OXYGENATED) GASOLINES (USA ONLY)
This type of gasoline is required in certain areas of the USA. The two types of “oxygenates” used in these fuels
is Alcohol (Ethanol) or Ether (MTBE or ETBE). If Ethanol is the “oxygenate” that is used in the gasoline in your area,
refer to “Gasolines Containing Alcohol” also.
These “Reformulated Gasolines” are acceptable for use in your MerCruiser engine.

CA277
GASOLINES CONTAINING ALCOHOL
If the gasoline in your area contains either “methanol” (methyl alcohol) or “ethanol” (ethyl alcohol), you should be
aware of certain adverse effects that can occur. These adverse effects are more severe with “methanol”. Increasing
the percentage of alcohol in the fuel can also worsen these adverse effects.
Some of these adverse effects are caused because the alcohol in the gasoline can absorb moisture from the air,
resulting in a separation of the water/alcohol from the gasoline in the fuel tank.

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 The fuel system components on your MerCruiser engine will withstand up to 10% alcohol content in the gasoline.
We do not know what percentage your boat’s fuel system will withstand. Contact your boat manufacturer for specif-
ic recommendations on the boats fuel system components (fuel tanks,fuel lines, and fittings). Be aware that gaso-
lines containing alcohol may cause increased:
• Corrosion of metal parts.
• Deterioration of rubber or plastic parts.
• Fuel permeation through rubber fuel lines.
• Starting and operating difficulties.

! WARNING
FIRE AND EXPLOSION HAZARD: Fuel leakage from any part of fuel system can be a fire and explosion
hazard which can cause serious bodily injury or death. Careful periodic inspection of entire fuel system
is mandatory, particularly after storage. All fuel components including fuel tanks, whether plastic metal
or fiberglass, fuel lines, fittings, fuel filters and carburetors/fuel injection components should be in-
spected for leakage, softening, hardening, swelling or corrosion. Any sign of leakage or deterioration re-
quires replacement before further engine operation.

Because of possible adverse effects of alcohol in gasoline, it is recommended that only alcohol-free gasoline be
used where possible. If only fuel containing alcohol is available, or if the presence of alcohol is unknown, increased
inspection frequency for leaks and abnormalities is required.

IMPORTANT: When operating a MerCruiser engine on gasoline containing alcohol, storage of gasoline
in the fuel tank for long periods should be avoided. Long periods of storage, common to boats, create
unique problems. In cars alcohol-blend fuels normally are consumed before they can absorb enough
moisture to cause trouble, but boats often sit idle long enough for phase separation to take place. In addi-
tion, internal corrosion may take place during storage if alcohol has washed protective oil films from inter-
nal components.

Quicksilver Gasoline Stabilizer for Marine Engines (92-817529A12) is highly recommended for addition during
storage periods. See “Cold Weather or Extended Storage” later in this manual.

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 CC218
Seacock Size Recommendation
Seacock used, must have an internal cross-sectional area equal to or greater than hose to prevent restricting wa-
terflow. Install valve in an area where it will be easily accessible and supported adequately to prevent hose fatigue.
A 1-1/4 in. (32mm) brass ball or gate valve is suggested.

CC16
Sea Strainer Recommendation
Strainer used must be of sufficient size to ensure that an adequate supply of water will be maintained for cooling
engine. A minimum of 30 gallons per minute (114 litres per minute) flow rate, is required.
CC18
Crankcase Oil
To help obtain optimum engine performance and to provide maximum protection, we strongly recommend the use
of Quicksilver 4-Cycle Marine Engine Oil. If not available, a good grade, straight weight, detergent automotive oil
of correct viscosity, with an API classification of SG/CD II, may be used.
The chart below is a guide to crankcase oil selection. Oil filter should always be changed with oil.
In those areas where recommended straight weight oil is not available, a multi-viscosity 20W-40 (SG/CD II) or, as
a second but less preferable choice, 20W-50 (SG/CD II) may be used.
IMPORTANT: The use of non-detergent oils, multiviscosity oils (other than 20W-40 or 20W-50), low quality
oils or oils which contain solid additives specifically are not recommended.

Quicksilver 4-Cycle Marine Engine Oil

SAE 40W, SG or CD II

SAE 30W, SG or CD II

SAE 20W, SG or CD II

32° F 50° F
0° C 10° C 70534
AIR TEMPERATURE

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 CC353
Engine Specifications
MODEL 350 MAGNUM MPI TOURNAMENT SKI
Propshaft Horsepower 1 2802
Propshaft Kilowatts 1 2082
Displacement 350 C.I.D.
(5.7 L)
Engine Type V8

Bore 4.00 in.

(101.6 mm)
Stroke 3.48 in.
(88.39 mm)
Compression Ratio 9.3:1
Compression Pressure 150 psi (1035 kPa)
Maximum RPM @ WOT 3 4600-5000 RPM 3
Idle RPM in
550-650 RPM
Forward Gear
Fuel Pump Pressure 3-9 psi (21-63 kPa)
Oil Pressure @ 2000 RPM 30-70 psi
(207-483 kPa)
Min. Oil Pressure @ Idle 4 psi (28 kPa)
Thermostat 160° F (71° C)
1 Power Rated in Accordance with NMMA Procedure Using Marine Engine Rating Code SAE J1228
(Technically Identical to ISO 3046 and ICOMIA 28-83).
2 Engine Rated with Velvet Drive 1:1 In-Line Transmission. Power Output with Other Transmissions Will Be Less.

3 Engine is equipped with an RPM Rev-Limiter. This limiter is designed to help prevent damage from engine over-speed. When the engine reaches
this preset limit, fuel is momentarily shut off to the fuel injectors. Once the RPM drops, complete fuel delivery resumes.

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 CC352
Tune-up Specifications
MODEL 350 MAGNUM MPI TOURNAMENT SKI

Spark Plug Type AC-MR43T/Champion RV15YC4/NGK BR6FS

Spark Plug Gap .035 in. (.9mm)

Timing @ Idle RPM 1 8° BTDC
Firing Order 1-8-4-3-6-5-7-2
Electrical System 12-Volt Negative (-) Ground
Alternator 65 Amps

Recommended
Minimum
Battery
550 cca, 700 mca or 120 Amp/Hrs
Rating
1 Timing must be set using a special procedure as outlined in the appropriate Service manual.
Timing cannot be properly set using the conventional method.

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 CC351
Capacities
MODEL 350 MAGNUM MPI TOURNAMENT SKI

Crankcase Oil1 Approx. 5 U.S.

Capacity w/New Filter Quarts (4.7L)

Seawater Cooling System2 15 Qts. (14.2L)

Transmission1 (Velvet Drive)

1:1 2 Qts. (1.9L)

1Always use dipstick to determine exact quantity of oil required.

2Seawater Cooling System capacity information is for winterization use only.

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 CC233
Maintenance

3
2
4

2
1

5 5

74192

6 71459

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 CC103
Maintenance
EFI System Maintenance Precautions

! WARNING
Avoid Injury or Electrical System Damage: Always disconnect battery cables from battery before working
around electrical system components. See IMPORTANT statement following:

! CAUTION
Avoid damage to the EFI electrical system components: Refer to the following precautions when working
on or around the EFI electrical harness, or when adding other electrical accessories:

• DO NOT tap accessories into engine harness.

• DO NOT puncture wires for testing (Probing).
• DO NOT reverse battery leads.
• DO NOT splice wires into harness.
• DO NOT attempt diagnostics without proper, approved Service Tools.
IMPORTANT: Refer to MAINTENANCE CHART for complete listing of all scheduled maintenance to be per-
formed. Some listings can be done by owner/operator, while others should be performed by an Authorized
MerCruiser Dealer. Before attempting maintenance or repair procedures not covered in this manual, it is
recommended that a MerCruiser Service Manual(s) be purchased and read thoroughly.
CC316
Maintenance Products

! WARNING
Always disconnect battery cables from battery before working around electrical system components to
prevent injury to yourself or damage to electrical system.

IMPORTANT: Refer to MAINTENANCE CHART for complete listing of all scheduled maintenance to be per-
formed. Some listings can be done by owner/operator, while others should be performed by an Authorized
MerCruiser Dealer. Before attempting maintenance or repair procedures not covered in this manual, it is
recommended that a MerCruiser Service Manual(s) be purchased and read thoroughly.

! CAUTION
Avoid damage to transmission. The transmission on your MerCruiser product is filled with Dexron III trans-
mission fluid at the factory. Do not mix other transmission fluids with Dexron III transmission fluid.

1 Velvet Drive Transmission - Dexron III Transmission Fluid or 10 wt. tractor hydraulic fluid meeting the C-3/TO-2
specification. (Preferably Mobil 424, Chevron, or Citgo.)
2 All Pivot Points - SAE 30W motor oil.
3 Fogging (Winterizing) Engine - Quicksilver Storage Seal or SAE 20W motor oil.
4 Crankcase Oil - Quicksilver 4-Cycle Marine Engine Oil. (Refer to SPEClFlCATlONS for alternatives and oil rec-
ommendations for varying ambient temperatures.)
5 All Exterior Surfaces - Quicksilver Primer and Spray Paint and Quicksilver Corrosion Guard.
6 Gasoline Stabilizer - Quicksilver Gasoline Stabilizer for Marine Engines.

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 CC285
Maintenance Schedules

! WARNING
Always disconnect battery cables from battery BEFORE working around electrical system components
to prevent injury to yourself or damage to electrical system should a wire be accidentally shorted.

Only perform maintenance which applies to your particular power package.

SCHEDULED MAINTENANCE TO BE PERFORMED BY OWNER/OPERATOR

TASK INTERVAL

Seawater Strainer - Check and clean Before Use and Whenever Insufficient Seawater
Flow is Suspected (If Operating Temperature
Water Pickups - Check for marine growth or debris. Exceeds Normal Range)

Engine Crankcase Oil - Check level

Transmission Fluid - Check level.
Closed Cooling System Coolant - Check level Weekly
Battery - Check level and inspect for damage
Fuel Pump Sight Tube - Check for no fuel present

Drive Belts - inspect condition and check tensions. Every 100 Hours of Use or 120 Days
Whichever Occurs First. Once a Year.

Power Package Exterior Surfaces - spray with Saltwater use: Every 50 hours of operation or
Quicksilver Corrosion Guard. 60 days, Whichever Occurs First
Freshwater use: Every 100 hours of operation
or 120 days, Whichever Occurs First

Power Package Exterior Surfaces - clean and paint. Once a Year

Cooling System - flush seawater section. Saltwater Use: After Each Use

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 CB310
Maintenance Chart
Only perform maintenance which applies to your particular power package.
SCHEDULED MAINTENANCE TO BE PERFORMED BY DEALER
TASK INTERVAL
20 - Hour Checkup (NOTE 1) At First 20 Hours of Operation
Whenever Insufficient Seawater Flow is Sus-
Seawater Pickup Pump - Disassemble pected. (If Operating Temperature Exceeds Nor-
and Inspect mal Range)
After first 20 hours, then every 100
Transmission Fluid - Change hours of operation thereafter

Crankcase Oil and Oil Filter - change

Ignition System - clean and inspect condition.
Flame Arrestor and Crankcase Ventilation
Hose - clean and inspect.

Engine Alignment - check Every 100 Hours of Operation or

Once Yearly, Whichever Occurs
First
Replace Positive Crankcase Ventilation Valve

In-Line Fuel Filter (Mounted

on port side of Plenum)

Electrical system - Check for loose

or damaged wiring.
Cooling system hoses and clamps - Inspect
for damage and deterioration. Check clamps Saltwater use: Every 50 hours of operation or
for tightness. 60 days, Whichever Occurs First.
Engine Exhaust System - Inspect externally for Freshwater use: Every 100 hours of operation
damage, deterioration and restrictions. Check or 120 days, Whichever Occurs First.
clamps for tightness.
Shift and Throttle Cable and Linkage - Lubri-
cate and inspect for loose, damaged or miss-
ing parts.
Ignition System - check timing; adjust if needed

Fuel Filter - replace.

Once a Year
Steering Head and Remote Control - Inspect and
lubricate.

Throttle Body - Inspect

NOTE 1 : For a list of 20-Hour Checkup maintenance items to be performed, see “IMPORTANT INFORMATION” section of this manual.

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 CC224

4 3 2
74176 70543 73749

5 71419

74192

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 CC37
Checking Fluid Levels
CHECKING CRANKCASE OIL
1 Stop engine. Allow approximately five minutes for oil to drain into oil pan. Boat must be at rest in water.
2 Remove dipstick. Wipe clean and reinstall fully into dipstick tube.
3 Remove dipstick and observe oil level. Oil level must be between FULL and ADD. If oil level is below ADD:
4 Remove oil filler cap. Add specified oil to bring level up to, but not over, “FULL” mark on dipstick.
IMPORTANT: Do not overfill crankcase oil.
CHECKING TRANSMISSION FLUID
IMPORTANT: Engine must be run at 1500 RPM for 2 minutes immediately prior to checking level.
5 Borg-Warner Transmissions – Stop engine and quickly check fluid level by turning T-handle counterclockwise,
to remove dipstick. Fluid level should be up to full mark. If low, add specified fluid through dipstick tube on
Borg-Warner transmissions.

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 CC225

3 74176

ON

74195
OFF

2
71344

73684

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 CC152
Changing Fluids
See MAINTENANCE CHART for lubricant change frequency. Lubricant should be changed before placing boat
in storage.
Transmission fluid should be changed at specified intervals by your Authorized MerCruiser Dealer.
CHANGING CRANKCASE OIL AND FILTER
IMPORTANT: Change oil when engine is warm from operation. Warm oil flows more freely, carrying away
more impurities. Use only recommended motor oil (see SPECIFICATIONS).
1 With engine at normal operating temperature, remove oil drain hose that is connected near the engine thermo-
stat housing. Remove fitting from end of hose. Lower hose into appropriate container and allow oil to drain. When
oil has drained completely, reinstall fitting in end of hose and and secure hose to engine using the attached clip.
2 Turn oil filter counterclockwise (to left); remove and discard old oil filter and old sealing ring. Coat sealing ring
on new filter with motor oil. Install new sealing ring and filter by turning clockwise (to right). Tighten filter securely.
Do not overtighten.
3 Remove oil filler cap. Add correct type oil (see SPECIFICATIONS) to bring level up to, but not over FULL mark
on dipstick.
IMPORTANT: Always use dipstick to determine exactly how much oil is required.

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 CC226

1
1 74174 74183

71457
70659

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 CC51
Lubrication
THROTTLE CABLE
1 Lubricate pivot points with specified motor oil.

CC319
SHIFT CABLE

2 Lubricate pivot points with specified motor oil.

3 Lubricate poppet ball and holes in lever with specified motor oil.

IMPORTANT: Poppet Ball MUST BE centered in detent hole for each F-N-R position.

4 Shift lever must be over this letter when propelling boat FORWARD.

IMPORTANT: Remote control, shift cable and linkages, must position transmission shift lever so that it
is fully in the forward and reverse gear detent positions with the lever over the letter “F” on transmission
case when propelling boat forward. IMPROPER POSITIONING OF SHIFT LEVER MAY CAUSE TRANSMIS-
SION TO FAIL. Damage caused to transmission as a result of improper shift lever positioning will not be
covered by Velvet Drive Transmission Warranty.

To obtain service and/or parts literature for your Velvet Drive transmission, contact:
Velvet Drive
Marine and Industrial Transmissions
Theodore Rice Boulevard
Industrial Park
New Bedford, MA 02745
U.S.A

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 CC232

74192

71170

3
71118

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 CC57
Flushing Cooling System

! WARNING
When flushing, be certain the area around propeller is clear, and no one is standing nearby. To avoid possi-
ble injury, remove propeller.

! CAUTION
Do not run engine above 1500 RPM when flushing. Suction created by seawater pickup pump may collapse
flushing hose, causing engine to overheat.

! CAUTION
Watch temperature gauge on dash to ensure that engine does not overheat.

! CAUTION
If cooling system is to be flushed with boat in the water, water inlet valve (if so equipped) must be closed,
or water inlet hose must be disconnected and plugged to prevent water from flowing into boat.

! CAUTION
If boat is in the water, do not open water inlet valve until engine is to be restarted, to prevent contaminated
water from flowing back into engine.

To prevent silt and/or salt buildup in cooling system, flush with freshwater at specified intervals.
1 Disconnect water inlet hose (Lower hose) from aft end of seawater pickup pump.
2 Using appropriate connector, connect hose between connector and water tap. Partially open water tap (about
1/2 maximum). Place remote control in NEUTRAL, idle speed position and start engine. Operate engine at idle
speed, in NEUTRAL, for about 10 minutes, or until discharge water is clear. Stop engine. Shut off water, remove
flushing connector from pump inlet and reconnect water inlet hose. Tighten hose clamp securely.
CC58
Seawater Pump Impeller
This maintenance should be performed by an Authorized MerCruiser Dealer.
3 Seawater pump impeller should be inspected whenever insufficient seawater flow is suspected (if operating
temperature exceeds normal range).

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 CC231

Maintenance (continued)

70562

74192

71349

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 CC62
Drive Belts

! WARNING
Avoid injury caused by hands or clothing being caught between belts and pulleys. Make sure engine is
shut off and ignition key is removed before inspecting belts.

All drive belts must be periodically inspected for condition and tension.
Perform the following inspections of alternator drive belt and seawater pickup pump drive belt.
If any drive belts need replacement or tension needs adjustment see your Authorized MerCruiser Dealer.
1 Alternator Drive Belt - Inspect drive belt for excessive wear or damage.
Check belt tension by depressing upper strand of belt at point shown. Belt should depress 1/2 in. (13mm)
2 Seawater Pump Drive Belt - Inspect drive belt for excessive wear or damage.
Check belt tension by depressing upper strand of belt at point shown. Belt should depress 1/4 in. (6mm).

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 CC374

1
1B

3
74637

2A
1A

73694

2
70573

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 CC277
Sight Tube Inspection
1 The engine is equipped with fuel system sight tubes which provide a visual indication of a problem in the fuel
delivery system. There is one coming from the mechanical fuel pump and one coming from the vapor seperator
tank. Both of the tubes are joined together and drain into the intake manifold. If there is fuel visible in the sight tube,
have your engine repaired by an Authorized MerCruiser Dealer immediately.
A. Fuel Pump Sight Tube - See Illustration
B. Vapor Seperator Tank Sight Tube - See Illustration

CC159
Water Separating Fuel Filter

! WARNING
Be careful when changing water separating fuel filter. Gasoline is extremely flammable and highly explo-
sive under certain conditions. Be sure ignition key is OFF. Do not smoke or allow spark or open flame in
area when changing fuel filter. Wipe up any spilled fuel immediately. Make sure no fuel leaks exist before
closing engine hatch.

2 Remove water separating fuel filter (by turning counterclockwise) and sealing ring from mounting bracket and
discard.
Coat sealing rings on new filter with motor oil. Thread filter clockwise onto bracket and tighten securely by hand.
Do not use a filter wrench.
Start and run engine. Check filter connection for gasoline leaks. If leaks exist, recheck filter installation. If leaks
continue, stop engine immediately and contact your Authorized MerCruiser Dealer.
CC366
In-Line Fuel Filter
3 The in-line filter is located in the aft end of the starboard fuel rail. Replace every year or 100 hours of operation
whichever occurs first.

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 CC69

1
71449

5 5
4
2
2

3
6
4
6
3

70140
70057

TYPICAL FRONT MOUNT TYPICAL REAR MOUNT

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 CC70
Engine Alignment
Engine alignment should be checked by your Authorized MerCruiser Dealer at specified intervals.
IMPORTANT: Engine alignment must be checked with boat in the water, fuel tanks filled and with a normal
load on board.
1 Engine must be aligned so that transmission and propeller shaft coupling centerlines are aligned and coupling
faces are parallel within .003 in. (.07mm).
After alignment is correct, coupler attaching screws and nuts must be torqued to 50 Ib. ft. (68 N⋅m).
2 Locking Nut - After alignment is correct, tighten securely.
3 Adjusting Nut - Turning nut clockwise lowers engine.
IMPORTANT: Both front mounts (or rear mounts) adjusting nuts must be turned equally to keep engine
level from side to side.
4 Clamping Screw(s) and Nut(s) - Loosen to allow sideways movement of engine. After alignment is correct, tight-
en securely.
NOTE: Some rear mounts have two clamping screws and nuts, on each side, others have only one clamping
screw and nut, on each side.
5 Maximum mount trunnion extension is 3/4 in. (20mm).
6 Tab Washer - After alignment is correct, bend tab against flat on adjust nut.
IMPORTANT: Be sure to recheck engine mount fasteners for adequate tightness after completing engine
alignment.

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 CA103
Miscellaneous Maintenance
Battery
All lead acid batteries discharge when not in use. Recharge every 30 to 45 days, or when specific gravity drops
below battery manufacturer’s specifications.
Refer to specific instructions and warnings accompanying your battery. If this information is not available, observe
the following precautions when handling a battery.

! WARNING
Do not use jumper cables and a booster battery to start engine. Do not recharge a weak battery in the boat.
Remove battery and recharge in a ventilated area away from fuel vapors, sparks or flames.

! WARNING
Batteries contain acid which can cause severe burns-Avoid contact with skin, eyes and clothing. Batteries
also produce hydrogen and oxygen gases when being charged. This explosive gas escapes fill/vent cell
caps and may form an explosive atmosphere around the battery for several hours after it has been
charged. Sparks or flames can ignite the gas and cause an explosion which may shatter the battery and
could cause blindness or other serious injury.

Safety glasses and rubber gloves are recommended when handling batteries or filling with electrolyte. Hy-
drogen gases that escape from the battery during charging are explosive. When charging batteries, be
sure battery compartment or area where batteries are located, is well-vented. Battery electrolyte is a corro-
sive acid and should be handled with care. If electrolyte is spilled or splashed on any part of the body, im-
mediately flush the exposed area with liberal amounts of water and obtain medical aid as soon as possible.
CC71
Bottom Of Boat
To maintain maximum speed, the following conditions of the boat bottom should be observed:
• Clean, free of barnacles and marine growth.
• Free of distortion, nearly flat where it contacts water.
• Straight and smooth, fore and aft.
CC72
Antifouling Paints
In some areas, it may be advisable to paint bottom to help prevent marine growth. See your dealer for recommen-
dations for your boat.
CA105
Inspection And Maintenance
Inspect power package often, and at regular intervals, to help maintain its top operating performance, and correct
potential problems before they occur. The entire power package should be checked carefully, including all accessi-
ble engine parts.
Check for loose, damaged or missing parts, hoses and clamps; tighten or replace as required.
Check plug leads and electrical leads for damage.
Remove and inspect propeller. If badly nicked, bent or cracked, see your dealer.
Repair nicks and corrosion damage on power package exterior finish. Use Quicksilver spray paints - see your Au-
thorized MerCruiser Dealer.

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 CC228

3B

74179

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 CC73
Cold Weather or Extended Storage
Power Package Layup
IMPORTANT: This service should be performed by an Authorized MerCruiser Dealer.

! CAUTION
DO NOT operate engine without water flowing thru seawater pickup pump, as pump impeller may be dam-
aged and subsequent overheating damage to engine or stern drive unit may result.

IMPORTANT: Before starting engine a water source must be attached to the seawater pump. Follow all
warnings, and flushing attachment procedures stated in “FLUSHING COOLING SYSTEM.”
1 Run engine sufficiently to bring it up to normal operating temperature. Shut off engine and change oil and oil
filter.
2 Flush cooling system.

CC349

! WARNING
Avoid Fire or Explosion: Be sure engine compartment is well ventilated and no gasoline vapors are pres-
ent during the following operation.

! WARNING
Avoid Fire or Explosion: Fuel injection system is pressurized during operation. Use care when removing
plug from vapor separator tank. Fuel could spray on hot engine causing fire or explosion. Allow engine
to cool down before attempting to remove the vapor separator tank plug in the following procedure. Also,
hold a clean shop towel over the plug when removing it, to help avoid fuel spraying on the engine.

3 Prepare fuel system for extended storage as follows:

A. Allow engine to cool down.
B. Remove plug from top of vapor separator tank.
C. Add approximately 1 fluid ounce (30 ml) of Quicksilver 2-Cycle Outboard Oil to fuel in the vapor separator tank.
D. Reinstall the plug in top of vapor separator tank.
E. Shut off the fuel supply to the engine’s fuel pump.
F. Start and run engine at idle speed until the vapor separator tank and fuel injection system are empty and engine
stops.
4 Fill fuel tank(s) with fresh gasoline (that does not contain alcohol) and a sufficient amount of Quicksilver Gaso-
line Stabilizer for Marine Engines to treat gasoline. Follow instructions on container.
5 If boat is to be placed in storage with fuel containing alcohol in fuel tanks (if fuel without alcohol is not
available): Vapor separator tank on engine must be run dry at idle RPM. Fuel tanks should be drained completely
and Quicksilver Gasoline Stabilizer fro Marine Engines added to any fuel remaining in the tank. Refer to “FUEL
REQUIREMENTS” for additional information.
6 Close fuel shut-off valve, if so equipped.

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 CC229

4 2A
74165 2B

71334
3 71170

8 71758
74140

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 CC186
Draining Instructions
DRAINING SEAWATER (RAW-WATER) COOLED MODELS

! CAUTION
If boat is to remain in water after draining, seawater inlet hose must be removed and plugged to prevent
a siphoning action that may occur, allowing seawater to flow from the drain holes or removed hoses.

! CAUTION
Seawater section of cooling system MUST BE COMPLETELY drained for winter storage, or immediately
after cold weather use, if the possibility of freezing temperatures exist. Failure to comply may result in
trapped water causing freeze and/or corrosion damage to engine.

1 Ensure engine is as level as possible to ensure complete draining of cooling system.

2 Remove drain plugs from cylinder block as follows:
A. Port Side - from cylinder block.
B. Starboard Side - from Y-fitting. Do not disturb the Y-fitting when removing the drain plug. There is an ignition
control “Knock Sensor” in the upper hole of the fitting. This sensor must not be loosened or removed. It is tight-
ened to a critical specification at the factory.
3 Remove drain plug from transmission cooler.
4 Remove the drain plugs from bottom of exhaust manifolds (port and stbd).
5 Repeatedly clean out drain holes using a stiff piece of wire. Do this until entire system is drained.
NOTE: It may be necessary to lift or bend hoses to allow water to drain completely. Crank engine over slightly to
purge any water trapped in seawater pickup pump. Do not allow engine to start.
Loosen hose clamps and disconnect the following hoses:
6 From engine circulating pump.
7 From seawater pickup pump (both hoses).
After cooling system has drained completely, coat drain plug threads with Quicksilver Perfect Seal and reinstall
drain plugs. Reconnect hoses and tighten all hose clamps securely.
IMPORTANT: MerCruiser recommends that propylene glycol antifreeze (nontoxic and biodegradable,
which makes it friendly to lakes and rivers) be used in seawater section of the cooling system for cold
weather or extended storage. Make sure that the propylene glycol antifreeze contains a rust inhibitor and
is recommended for use in marine engines. Be certain to follow the propylene glycol manufacturer’s rec-
ommendations.
8 For additional assurance against freezing and rust, remove thermostat cover and thermostat. Fill engine seawa-
ter cooling system with a mixture of antifreeze and tap water mixed to manufacturer’s recommendation to protect
engine to the lowest temperature to which it will be exposed during cold weather or extended storage. Using a new
gasket, reinstall thermostat and cover. Tighten cover bolts securely.
Perform all checks, inspections, lubrication, and. fluid changes outlined in MAINTENANCE CHART under AT
LEAST ONCE A YEAR.

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 CA115
Battery Winter Storage
Follow battery manufacturer’s instructions for storage.
CC165
Power Package Recommissioning

! WARNING
To prevent possible injury or damage to equipment, do not install battery until all maintenance has been
performed on engine.

• Check that all cooling system hoses are connected properly and hose clamps are tight.

! CAUTION
When installing battery, be sure to connect POSITIVE (+) battery cable to POSITIVE (+) battery terminal
FIRST, and NEGATIVE (–) battery cable to NEGATIVE (–) battery terminal LAST. If battery cables are re-
versed, or connection order is reversed, electrical system damage will result.

• Install fully charged battery. Clean battery cable clamps and terminals and reconnect cables (see CAUTION
listed above). Secure each cable clamp when connecting.
• Coat terminal connections with a battery terminal anti-corrosion agent.
• Perform all checks in OPERATION CHART in the BEFORE STARTING column.

! CAUTION
Refer to precautions listed under “FLUSHING COOLING SYSTEM” before starting engine.

• Start engine and closely observe instrumentation to make sure that all systems are functioning correctly.
• Carefully inspect engine for fuel, oil, fluid, water and exhaust leaks.
• Check steering system, shift and throttle control for proper operation.
• Check fuel system sight tube for evidence of fuel. If fuel is present, contact your Authorized MerCruiser Dealer
for repairs.

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 CC121
Troubleshooting
Trouble Possible Cause Remedy
Starter motor • Battery switch turned off (if so • Turn switch on.
won’t crank en- equipped)
gine or cranks it
very slowly • Remote control not in neutral • Position control lever properly. Lever MUST
position BE EXACTLY in neutral.
• Open circuit breaker or blown • Check and reset circuit breaker or replace fuse.
fuse.
• Loose or dirty electrical connec- • Check all associated electrical connections
tions or damaged wiring and wires (especially battery cables). Refer to
wiring diagram, following. Clean and tighten
faulty connection. Repair or replace wiring.

• Bad battery • Test and replace if bad.

Engine won’t • Improper starting procedure • Review starting procedure under “Operation
start or is hard Instructions.”
to start
• Empty fuel tank or fuel shut-off • Fill tank or open valve.
valve closed (if so equipped)

• Faulty fuel pump • Check sight-tube for fuel. Have your dealer re-
place pump, if fuel is present.

• Engine flooded • Do not attempt to start engine for at least 5 min-

utes; then, follow the procedure for starting a
flooded engine, found in the “Operation” sec-
tion of this manual.

• Faulty ignition system com- • Service ignition system.

ponent

• Clogged fuel filters • Replace filters.

• Contaminated fuel • Inspect fuel for water or other contaminants. If

contaminated, drain tank and flush with fresh
fuel.
• Fuel line or tank vent line kinked • Replace kinked lines or blow out lines with
or clogged compressed air to remove obstruction.

• EFI System Fault • Have EFI System checked by an Authorized

MerCruiser Dealer.

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 Trouble Possible Cause Remedy
Engine runs • Faulty fuel pump • Check sight tube. Have your dealer replace
rough, misses pump, if fuel is present.
and/or backfires
• Idle speed too low (if engine is • Check idle speed and adjust, if necessary.
rough at idle)
• Faulty ignition system component • Service ignition system
• Clogged fuel filters • Replace filters.

• Contaminated fuel • Inspect fuel for water or other contaminants.

If contaminated, drain tank and flush. Fill with
fresh fuel.
• Kinked or clogged fuel line or fuel • Replace line if kinked. Blow out line with
tank vent line compressed air to remove obstruction.
• Flame arrestor plugged with • Clean flame arrestor.
foreign material.
• EFI System Fault • Have EFI System checked by an Authorized
MerCruiser Dealer.

Poor performance • Throttle not fully open • Inspect cable and linkages for binding, ob-
struction or loose fasteners.
• Damaged or improper propeller • Replace.

• Excessive bilge water • Drain and check for cause of entry.

• Boat overloaded or load improp- • Reduce load or redistribute load more evenly.
erly distributed
• Boat bottom fouled or damaged • Clean or repair as necessary.

• Flame arrestor dirty • Clean flame arrestor.

• Engine overheating • See “Excessive engine temperature”.

• Ignition or EFI System fault • Refer to “Engine runs rough, misses and/or
backfires”.

Excessive engine • Water inlet valve closed (if so • Open valve COMPLETELY.
temperature equipped)

• Alternator drive belt loose, broken • Replace and/or adjust belt.

or in poor condition
• Seawater pickup pump drive belt • Replace and/or adjust belt.
loose, broken or in poor condition.
• Water pickup obstructed • Remove obstruction.
• Kinked, collapsed or broken hose • Straighten or replace hose.
• Faulty thermostat • Replace.

• Transmission fluid cooler and/or • Disconnect hoses from coolers and flush out with
engine oil cooler plugged with a water hose in direction opposite normal water
foreign material flow.
(continued next page)

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 Trouble Possible Cause Remedy
Excessive engine • Coolant level low in fresh water • Check for cause of low coolant level and repair.
temperature section Fill system with proper coolant solution.
(continued)
• Heat exchanger cores plugged • Clean.
with foreign material
• Loss of pressure in fresh water • Check for leaks. Clean, test and inspect pres-
section sure cap.
Insufficient engine • Faulty thermostat • Replace.
temperature

Low engine oil • Insufficient oil in crank- • Check and add correct grade and viscosity oil.
pressure case Check entire engine for leaks.
• Excessive oil in crankcase • Check and remove required amount of oil.
(causing it to become aerated) Check for cause of excessive oil (improper
filling, bad fuel pump, etc.).
• Diluted or improper viscosity oil • Change oil and oil filter, being sure to use
correct grade and viscosity oil. Determine
cause for dilution (excessive idling, faulty
fuel pump, etc.).
• Engine oil cooler hose kinked • Straighten hose or replace if damaged.
(causing excessive oil temper-
ature and thinning of the oil)
Excessive trans- • Low fluid level • Maintain fluid level.
mission fluid
temperature or • Transmission shift lever not posi- • Inspect shift linkages and shift lever
slipping trans-
tioned properly (causing clutches positioning
mission
to slip and overheat fluid)

• Fluid cooler hoses kinked • Straighten hoses or replace, if damaged.

Battery will not • Excessive current draw from bat- • Turn off non-essential accessories.
come up on tery
charge
• Loose or dirty electrical connec- • Check all associated electrical connections
tions or damaged wiring and wires (especially battery cables). Clean
and tighten faulty connections. Repair or re-
place damaged wiring.
• Alternator drive belt loose or in • Replace and/or adjust.
poor condition
• Unacceptable battery condition • Test battery.
Remote control • Insufficient lubrication on shift and • Lubricate.
operates hard, throttle linkages
binds, has exces-
sive free-play or • Loose or missing shift and • Check all linkages. If any are loose or missing,
makes unusual throttle linkage fasteners SEE YOUR DEALER IMMEDIATELY.
sounds

• Obstruction in shift or throttle • Remove obstruction.

linkages

• Shift or throttle cable kinked • Straighten cable or have your dealer replace
cable if damaged beyond repair.

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 CC163
Water Flow Diagram

73854

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 CC117
Wiring Diagrams
Quicksilver Instrumentation
Refer to gauge manufacturer’s instructions for specific connections.
NOTE: 1 Connect Wires Together with Screw and Hex Nut; Apply Liquid Neoprene to Connection and Slide
Rubber Sleeve over Connection.
NOTE: 2 Power for a Fused Accessory Panel May Be Taken from This Connection. Load Must Not Exceed
40 Amps. Panel Ground Wire Must Be Connected to Instrument Terminal That Has an 8-Gauge BLACK
(Ground) Harness Wire Connected to it.
NOTE: 3 Taped back BROWN/WHITE wire may be used for an accessory. LOAD MUST NOT EXCEED
5 AMPS.

BLK = BLACK
BLU = BLUE
BRN = BROWN
GRN = GREEN
GRY = GRAY
ORN = ORANGE
PNK= PINK
PUR= PURPLE
RED= RED
TAN = TAN
WHT = WHITE
YEL = YELLOW
LIT = LIGHT
DRK= DARK

NOTE 1 & 2

73371
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 CC253
Starting And Charging System Harness

BLK = BLACK
BLU = BLUE
BRN = BROWN
GRN = GREEN
GRY = GRAY
ORN = ORANGE
PNK= PINK
PUR= PURPLE
RED= RED
TAN = TAN
WHT = WHITE
B
YEL = YELLOW
LIT = LIGHT
DRK= DARK

A - Charging and Starting Circuit

B - Audio Warning/Power Reduction Circuit
C- Instrumentation Senders

1 - Harness Connector To EFI System Harness

2 - Positive (+) Power Wire To EFI System Harness
3 - Auxiliary Tachometer Lead

A 1

73370

90 Amp Fuse

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 CC234
E.F.I. System Harness
BLK = BLACK
1 - Vapor Separator Tank (VST)
2 - Throttle Body BLU = BLUE
3 - Distributor BRN = BROWN
4 - Coil GRN = GREEN
5 - Electronic Spark Control (KS) Module GRY = GRAY
6 - Data Link Connector (DLC) ORN = ORANGE
7 - Manifold Absolute Pressure (MAP) Sensor
8 - Knock Sensor PNK= PINK
9 - Idle Air Control (IAC) PUR= PURPLE
10 - Throttle Position (TP) Sensor RED= RED
11 - Engine Coolant Temperature (ECT) Sensor TAN = TAN
12 - Electronic Control Module (ECM) WHT = WHITE
13 - Fuel Pump Relay YEL = YELLOW
14 - Ignition/System Relay
15 - Fuse (15 Amp) Fuel Pump LIT = LIGHT
16 - Fuse (15 Amp) ECM/DLC/Battery DRK= DARK
17 - Fuse (10 Amp) ECM/Injector/Ignition/Knock Module
18 - Harness Connector To Starting/Charging Harness
19 - Harness Connector To Lanyard Stop Switch (Optional)
20 - Harness Connector For Dual Engine Data Link Cable
21 - Positive (+) Power Wire To Engine Circuit Breaker

4
2
8

10 9
12 19

GR 6
Y

17
18 11 5
16
14 20

13 15
21
74182

NOTE: All BLACK wires with a ground symbol are interconnected within the E.F.I. system harness.
NOTE: Component position and orientation shown above is arranged for visual clarity and ease of circuit identification.

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 CA272
Warranty Information
Owner Warranty Registration
UNITED STATES AND CANADA ONLY
• It is important that your selling dealer fills out the Warranty Registration Card completely and mails it to the facto-
ry immediately upon sale of the new product.
• It identifies name and address of the original purchaser, product model and serial number(s), date of sale, type
of use and selling dealer’s code, name and address. The dealer also certifies that you are the original purchaser
and user of the product.
• Upon receipt of the Warranty Registration Card at the factory, you will be issued a plastic Owner Warranty Regis-
tration Card which is your only valid registration identification. It must be presented to the servicing dealer should
warranty service be required. Warranty claims will not be accepted without presentation of this card.
• A temporary Owner Warranty Registration Card will be presented to you when you purchase the product. It is
valid only for 30 days from date of sale while your plastic Owner Warranty Registration Card is being processed.
Should your product need service during this period, present the temporary registration card to the dealer. He
will attach it to your warranty claim form.
• Because of your selling dealer’s continuing personal interest in your satisfaction, the product should be returned
to him for warranty service.
• If your plastic card is not received within 30 days from date of new product sale, please contact your selling deal-
er.
• The product warranty is not effective until the product is registered at the factory.
• NOTICE: Registration lists must be maintained by factory and dealer on marine products sold in the United
States, should notification under the Federal Boat Safety Act be required.

International Owner Registration

OUTSIDE THE UNITED STATES AND CANADA
• It is important that your selling dealer fills out the Warranty Registration Card completely and mails it to the dis-
tributor or Marine Power Service Center responsible for administering the warranty registration/claim program
for your area.
• The Warranty Registration Card identifies your name and address, product model and serial number(s), date
of sale, type of use and the selling distributor’s/dealer’s code number, name and address. The distributor/dealer
also certifies that you are the original purchaser and user of the product.
• A copy of the Warranty Registration Card, designated as the “Purchaser’s Copy”, MUST be given to you immedi-
ately after the card has been completely filled out by the selling distributor/dealer. This card represents your
factory registration identification, and should be retained by you for future use when required. Should you ever
require warranty service on this product, your dealer may ask you for the Warranty Registration Card to verify
date of purchase and to use the information on the card to prepare the warranty claim form (s).
• In some countries, the Marine Power Service Center will issue you a permanent (plastic) Warranty Registration
Card within 30 days after receiving the “Factory Copy” of the Warranty Registration Card from your distributor/
dealer. If you receive a plastic Warranty Registration Card, you may discard the “Purchaser’s Copy” that you
received from the distributor/dealer when you purchased the product. Ask your distributor/dealer if this plastic
card program applies to you.
• For further information concerning the Warranty Registration Card and its relationship to Warranty Claim pro-
cessing, refer to the “International Warranty”. Refer to “Table of Contents”.
IMPORTANT: Registration lists must be maintained by the factory and dealer in some countries by law.
It is our desire to have ALL products registered at the factory should it ever be necessary to contact you.
Make sure your dealer/distributor fills out the warranty registration card immediately and sends the facto-
ry copy to the Marine Power International Service Center for your area.
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 Warranty Policies
MerCruiser Limited Warranty - Gasoline Engines
UNITED STATES AND CANADA ONLY
I. We warrant each new production (not those made for high performance purposes) MerCruiser Stern Drive
Power Package, Inboard Engine and accessories attached thereto, (hereafter referred to as “Product”) to be
free from defects in material and workmanship, but only when the consumer sale is made in the country to
which distribution is authorized by us.
II. This warranty shall become effective only upon our receipt of a completed Warranty Registration Card, which
shall identify the Product so registered by serial number.This warranty shall remain in effect for a period of
one (1) year from date of purchase.
III. Since this warranty applies to defects in material and workmanship, it does not apply to normal worn parts,
adjustments, tune-ups or to damage caused by: 1) Neglect, lack of maintenance, accident, abnormal opera-
tion or improper installation or service; 2) Use of an accessory or part not manufactured or sold by us; 3) Oper-
ation with fuels, oils or lubricants which are not suitable for use with the Product; 4) Participating in or prepar-
ing for racing or other competitive activity or operating with a racing type lower unit; 5) Alteration or removal
of parts; or 6) Water entering engine cylinder/s through the exhaust system or carburetor/s.
IV. Reasonable access must be provided to the product for warranty service. This warranty will not apply to: 1)
Haul-out, launch, towing and storage charges; telephone or rental charges of any type, inconvenience, or loss
of time or income; or other consequential damages; or 2) Removal and/or replacement of boat partitions or
material because of boat design for necessary access to the Product.
V. Claim shall be made under this warranty by delivering the Product for inspection to a MerCruiser dealer autho-
rized to service the Purchaser’s product. If purchaser cannot deliver Product to such authorized dealer, he
may give notice in writing to the Company. We shall then arrange for the inspection and repair, provided such
service is covered under this warranty. Purchaser shall pay for all related transportation charges and/or travel
time. If the service is not covered by this warranty purchaser shall pay for all related labor and material and
any other expenses associated with that service. Any Product or parts shipped by purchaser for inspection
or repair must be shipped with transportation charges prepaid. The Warranty Registration Card is the only
valid registration identification and must be presented at the time warranty service is required. Warranty
claims will not be accepted without presentation of the Warranty Registration Card.
VI. Our obligation under this Warranty shall be limited to repairing a defective part, or at our option, refunding
the purchase price or replacing such part or parts as shall be necessary to remedy any malfunction resulting
from defects in material or workmanship as covered by this Warranty. We reserve the right to improve the
design of any Product without assuming any obligation to modify any Product previously manufactured.
VII. ALL INCIDENTAL AND/OR CONSEQUENTIAL DAMAGES ARE EXCLUDED FROM THIS WARRANTY.
WARRANTIES OF MERCHANTABILITY AND FITNESS ARE EXCLUDED FROM THIS WARRANTY. IM-
PLIED WARRANTIES ARE LIMITED TO THE LIFE OF THIS WARRANTY. SOME STATES DO NOT ALLOW
LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS OR THE EXCLUSION OR LIMITATION
OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSIONS MAY
NOT APPLY TO YOU.
VIII. This warranty gives you specific legal rights, and you may also have other legal rights which vary from state
to state.

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 MerCruiser International Warranty -
Gasoline Engines
OUTSIDE THE UNITED STATES AND CANADA

I. We warrant each new production (not those made for high performance purposes) MerCruiser Stern Drive
Power Package, Inboard Engine and accessories attached thereto, (hereafter referred to as “Product”) to be
free from defects in material and workmanship, but only when the consumer sale is made in the country to
which distribution is authorized by us. This warranty shall remain in effect for a period of one (1 ) year from
date of purchase.
II. Since this warranty applies to defects in material and workmanship, it does not apply to normal worn parts,
adjustments, tune-ups or to damage caused by: 1) Neglect, lack of maintenance, accident, abnormal opera-
tion or improper installation or service; 2) Use of an accessory or part not manufactured or sold by us: 3) Oper-
ation with fuels, oils or lubricants which are not suitable for use with the Product: 4) Participating in or prepar-
ing for racing or other competitive activity or operating with a racing type lower unit: or 5) Alteration or removal
of parts or 6) Water entering engine cylinder/s through exhaust system or carburetor/s.
III. Reasonable access must be provided to the Product for warranty service. This warranty will not apply to: 1)
Haul-out, launch, towing and storage charges telephone or rental charges of any type, inconvenience, or loss
of time or income or other consequential damages or 2) Removal and/or replacement of boat partitions or
material because of boat design for necessary access to the Product.
IV. Claim shall be made under this warranty by delivering the Product for inspection to a MerCruiser dealer autho-
rized to service the Product If purchaser cannot deliver Product to such authorized dealer, he may give notice
in writing to the Marine Power Service Center or distributor. The Marine Power Service Center or distributor
shall then arrange for the inspection and repair, provided such service is covered under this warranty Pur-
chaser shall pay for all related transportation charges and/or travel time. If the service is not covered by this
warranty purchaser shall pay for all related labor and material, and any other expenses associated with that
service. Any Product or parts shipped by purchaser for inspection or repair must be shipped with transporta-
tion charges prepaid.
V. Purchaser must provide “proof of purchase” and substantiate “date of purchase” by presenting the “Purchas-
er’s Copy” of the “Warranty Registration Card” or the plastic “Warranty Registration Card” to the dealer autho-
rized to service the Product. lf either of these items is not available purchaser must provide a copy of the origi-
nal ”Bill of Sale” (Sales Contract) for the Product to be serviced. Warranty claims will not be accepted until
adequate ”proof of purchase” is presented by purchaser and ”date of purchase” has been substantiated.
VI. Our obligation under this Warranty shall be limited to repairing a defective part or AT OUR OPTION, refunding
the purchase price or replacing such part or parts as shall be necessary to remedy any malfunction resulting
from defects in material or workmanship as covered by this Warranty. We reserve the right to improve the
design of any Product without assuming any obligation to modify any Product previously manufactured.
VII. ALL INCIDENTAL AND/OR CONSEQUENTIAL DAMAGES ARE EXCLUDED FROM THIS WARRANTY
WARRANTIES OF MERCHANTABILITY AND FITNESS ARE EXCLUDED FROM THIS WARRANTY IM-
PLIED WARRANTIES ARE LIMITED TO THE LIFE OF THIS WARRANTY SOME COUNTRIES DO NOT AL-
LOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS OR THE EXCLUSION OR LIMITA-
TION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR
EXCLUSIONS MAY NOT APPLY TO YOU.
VIII. This warranty gives you specific legal rights, and you may also have other legal rights which vary from country
to country.
MARINE POWER INTERNATIONAL
Division of Brunswick Corporation
Fond du Lac, Wisconsin 54935 U.S.A.

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 3 Year Limited Warranty Against Corrosion Failure
(Applicable in the United States, Canada and Australia)

I. We warrant parts and assemblies of each 1988 and newer production MerCruiser (Product) sold with a one
year limited Product warranty or the Bravo and TRS Drive Units on performance Products that have a 90 day
limited warranty rendered inoperative as a direct result of corrosion, provided the following simple precaution-
ary steps which are specified in Owner’s Manuals have been taken:
1. Specified maintenance procedures (such as replacement of sacrificial anodes, specified lubrication and
touch-up of nicks and scratches) have been implemented on a timely basis.
2. Recommended corrosion prevention devices have been employed (details below).
II. This warranty shall become effective upon receipt of a completed standard Product warranty registration card
and shall remain effective for a period of three years from the date of purchase.
III. This warranty does not cover: (1) electrical system corrosion; (2) corrosion resulting from damage, abuse or
improper service; (3) corrosion to accessories, instruments, steering systems; (4) damage due to marine
growth; (5) Product sold with less than a one year limited Product warranty except for Bravo and TRS Drive
Units; nor (6) Product used in commercial application.
IV. ALL INCIDENTAL AND/OR CONSEQUENTIAL DAMAGES ARE EXCLUDED FROM THIS WARRANTY.
WARRANTIES OF MERCHANTABILITY AND FITNESS ARE EXCLUDED FROM THIS WARRANTY. IM-
PLIED WARRANTIES ARE LIMITED TO THE LIFE OF THIS WARRANTY. SOME STATES (OR COUN-
TRIES) DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS OR THE EX-
CLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE
LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU.
V. This warranty gives you specific legal rights, and you may also have other legal rights which vary from state
to state (or country to country).
VI. Other details of this warranty are contained in paragraphs IV, V and VI of the (United States and Canada)
Product Warranty, and paragraphs III, IV, V and VI of the (International) Product Warranty, contained in this
manual, which paragraphs are incorporated herein by reference.
Mercury Marine products are built using the most advanced corrosion protection process available. This manufac-
turing system, complemented by dealer and customer participation in an anti-corrosion preventive maintenance
program, provides protection against repair costs incurred by the effects of marine corrosion.

OWNER’S RESPONSIBILITY
Protection against certain types of corrosion damage must be provided by using such systems as the Quicksilver
MerCathode System and/or Galvanic Isolator. These certain types of corrosion damage are: damage due to stray
electrical currents (on-shore power connections, nearby boats, submerged metal), or improper application of cop-
per base anti-fouling paint.
If anti-fouling protection is required, Tri-Butyl-Tin-Adipate (TBTA) base antifouling paints are recommended on
MerCruiser boating applications. In areas where Tri-Butyl-Tin-Adipate base paints are prohibited by law, copper
base paints can be used on the boat hull and transom. Do not apply paint to the MerCruiser drive unit or transom
assembly. In addition, care must be taken to avoid an electrical interconnection between the MerCruiser Product
and the paint. Corrosion damage that results from the improper application of copper base paint will not be covered
by this limited warranty.

TRANSFER OF WARRANTY
This Limited Warranty is transferable to subsequent purchasers for the remainder of the unused portion of the
3-year limited warranty.

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 Warranty Coverage
The purpose of this section is to help eliminate some of the more common misunderstandings regarding warranty
coverage. The table explains some of the types of services that are not covered by warranty.
Keep in mind that warranty covers repairs that are needed within the warranty period because of defects in material
and workmanship. Installation errors, accidents, normal wear, and a variety of other causes that affect the product
are not covered.
Warranty is limited to defects in material or workmanship, but only when the consumer sale is made in the country
to which distribution is authorized by us.
Should you have any questions concerning warranty coverage, contact your authorized dealer. They will be
pleased to answer any questions that you may have.

Warranty Does Not Apply To The Following:

• Minor adjustments and tune-ups, including checking, cleaning or adjusting spark plugs, ignition components,
carburetor settings, filters, belts, controls, and checking lubrication made in connection with normal services.
• Damage caused by neglect, lack of maintenance, accident, abnormal operation or improper installation or ser-
vice.
• Haul-out, launch, towing charges; removal and/or replacement of boat partitions or material because of boat
design for necessary access to the product; all related transportation charges and/or travel time, etc. Reason-
able access must be provided to the product for warranty service. Customer must deliver product to an Autho-
rized Dealer.
• Additional service work requested by customer other than that necessary to satisfy the warranty obligation.
• Labor performed by other than an Authorized Dealer may be covered only under following circumstances: When
performed on emergency basis (providing there are no Authorized Dealers in area who can perform the work
required or have no facilities to haul out, etc., and prior factory approval has been given to have the work per-
formed at this facility).
• All incidental and/or consequential damages (storage charges, telephone or rental charges of any type, incon-
venience or loss of time or income) are the owner’s responsibility.
• Use of other than Quicksilver replacement parts when making warranty repairs.
• Oils, lubricants or fluids changed as a matter of normal maintenance is customer’s responsibility unless loss
or contamination of same is caused by product failure that would be eligible for warranty consideration.
• Participating in or preparing for racing or other competitive activity.
• Engine noise does not necessarily indicate a serious engine problem. If diagnosis indicates a serious internal
engine condition which could result in a failure, condition responsible for noise should be corrected under the
warranty.
• Lower unit and/or propeller damage caused by striking a submerged object is considered a marine hazard.
• Water entering the engine via the carburetor or exhaust system or submersion. Also water in the starter motor.
• Starter motors and/or armatures or field coil assembly, which are burned, or where lead is thrown out of commu-
tator because of excess cranking.
• Valve or valve seat grinding required because of wear.
• Failure of any parts caused by lack of cooling water, which results from starting power package out of water,
foreign material blocking inlets or power package being mounted too high.
• Use of fuels and lubricants which are not suitable for use with or on the product.
• Our limited warranty does not apply to any damage to our products caused by the installation or use of parts
and accessories which are not manufactured or sold by us. Failures which are not related to the use of those
parts or accessories, are covered under warranty, if they otherwise meet the terms of the limited warranty for
that product.
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 Transferable Warranty
The product warranty is transferable to a subsequent purchaser, but only for the remainder of the unused portion
of the limited warranty. This will not apply to products used for commercial applications.

Direct Sale By Owner

• The second owner can be registered as the new owner and retain the unused portion of the limited warranty
by sending the former owner’s plastic Owner Warranty Registration Card and a copy of the bill of sale to show
proof of ownership. In the United States and Canada, mail to:

Mercury Marine
Attn: Warranty Registration Department
W6250 West Pioneer Road
P.O. Box 1939
Fond du Lac, WI 54936-1939

• A new Owner Warranty Registration Card will be issued with the new owner’s name and address. Registration
records will be changed on the factory computer registration file.
• There is no charge for this service.
Outside the United States and Canada, please contact the distributor in your country, or the Marine Power
International Service Center closest to you, for the transferable warranty procedure that would apply to
you.

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 Q-Guard Product Protection Plan
United States and Canada Only
(Certain performance products,triple engine installations, and commercial applications are excluded)
The Mercury Marine Q-Guard Product Protection Plan provides coverage against unexpected mechanical and
electrical breakdowns that may occur beyond the standard limited warranty.
The optional Q-Guard Product Protection Plan is the only Factory Plan available for your engine.
Two, three or four - year term plans can be purchased up to 180 days after the original engine purchase date.
See your participating MerCruiser dealer for complete program details.

Owner Service Assistance

Local Repair Service
Always return your MerCruiser powered boat to your local Authorized Dealer, should the need for service arise.
Only he has the factory trained mechanics, knowledge, special tools and equipment and the genuine Quicksilver
parts and accessories* to properly service your engine should the need occur. He knows your engine best.
* Quicksilver parts and accessories are engineered and built by Mercury Marine, specifically for MerCruiser stern
drives and inboards.

Service Away From Home

If you are away from your local dealer and the need arises for service, contact the nearest Authorized Dealer. Refer
to the Yellow Pages of the telephone directory. If, for any reason, you cannot obtain service, contact the nearest
Regional Service Center. Outside the United States and Canada, contact the nearest Marine Power International
Service Center.

Parts and Accessories Inquiries

All inquiries concerning Quicksilver replacement parts and accessories should be directed to your local Authorized
Dealer. The dealer has the necessary information to order parts and accessories for you should he not have them
in stock. Only Authorized Dealers can purchase genuine Quicksilver parts and accessories from the factory. Mer-
cury Marine does not sell to unauthorized dealers or retail customers. When inquiring on parts and accessories,
the dealer requires the motor model and serial number(s) to order the correct parts.

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 Resolving a Problem
Your satisfaction and goodwill are of primary importance to your dealer and to MerCruiser. Any problems with ser-
vice, sales, warranty or operation of your MerCruiser power package will be resolved by your dealer. He also is
your primary source of information on your boat, power package and trailer. Should there be a misunderstanding,
or if your problem has not been resolved to your satisfaction, please follow these steps:
STEP ONE - DISCUSS YOUR PROBLEM WITH ONE OF THE
DEALERSHIP MANAGEMENT PERSONNEL.
Misunderstandings or complaints can be quickly resolved by the dealer. If you are unable to obtain satisfaction,
contact the dealership’s owner.
STEP TWO - IF YOU REQUIRE ADDITIONAL ASSISTANCE TO
RESOLVE YOUR CONCERN, CONTACT YOUR
NEAREST MERCRUISER SERVICE CENTER.
Provide the following important information:
• Your name, address and telephone number.
• The model and serial number(s).
• Your dealer’s name and location.
• Date of purchase.
• Present hours of operation.
• Details of problem or complaint.
• Boat make and size.
• Propeller pitch and/or part number.
• Normal use and approximate gross load.
Please bear in mind that Service Centers resolve all problems through the dealership using the dealer’s facili-
ties, equipment and personnel. This is the reason we request you use the preceding steps in sequence when
you have a problem or complaint. Our experience has shown that this is the most expedient and successful proce-
dure to follow to ensure satisfaction to our customers.
FOLLOW STEP THREE ONLY AFTER COMPLETING STEPS ONE AND TWO AND YOUR COMPLAINT HAS
NOT BEEN RESOLVED.
STEP THREE -CONTACT CONSUMER AFFAIRS DEPARTMENT
United States:
MERCRUISER
3003 N. Perkins Road
Stillwater, OK 74075-2299
Telephone (405) 743-6515
Canada:
Contact Nearest Regional Service Center
Other Countries:
Contact the Nearest
Marine Power International Service Center
The customer service representatives will review all the facts involved. If they feel some further action can be taken,
they will advise the Service Center. They will contact your dealer to bring the problem to a satisfactory conclusion.
ALL SERVICE WORK IS DONE BY THE AUTHORIZED DEALER USING THE DEALER’S FACILITIES. OUR
SERVICE CENTERS AND FACTORY DO NOT HAVE FACILITIES TO SERVICE OR REPAIR YOUR PRODUCT.

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 Service Centers
UNITED STATES
MerCruiser
3003 N. Perkins Road
Stillwater, OK 74075-2299
Telephone (405) 743-6566
Fax (405) 743-6570
CANADA
Mercury Marine
1156 Dundas Highway East
Mississauga, Ontario
L4Y 2C2 Canada
Telephone (905) 270-4481
Fax (905) 270-4510
MEXICO, CENTRAL AMERICA,
SOUTH AMERICA, CARIBBEAN
Marine Power International
9350 SW 72nd St. (Sunset Dr.)
Suite 100
Miami, FL 33173
U.S.A.
Telephone (305) 596-9606
Fax (305) 596-3869
EUROPE, MIDDLE EAST, AFRICA
Marine Power Europe, Inc.
Parc Industriel de Petit-Rechain
B-4822 Verviers
Belgium
Telephone (0) (87) 32 • 32 • 11
Fax (32) (87) 31 19  65

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 AUSTRALIA, PACIFIC
Marine Power International Pty. Ltd.
P. B. 1420
132-140 Frankston Road
Dandenong, Victoria 3164
Australia
Telephone (61) (3) 791-5822
Fax (61) (3) 791-5880
ASIA
Marine Power International Ltd.
Block 1002 Jalan Bukit Merah #07-08
Redhill Industrial Estate
JTC Flatted Factories
Singapore 0315
Telephone (65) 270-7680
Fax (65) 270-7898
JAPAN
Marine Power International - Japan
No.27-2 Muramatsu Chisaki-Shinden
Shimizu City
Shizuoka Prefecture
Japan 424
Telephone (81) 543/34-2500
Fax (81) 543/34-2022

Customer Service Literature

English language publications are available from:
Mercury Marine
Attn: Publications Department
W6250 West Pioneer Road
P.O. Box 1939
Fond du Lac, WI 54936-1939
Outside the United States and Canada, contact the nearest Marine Power International Service Center for
further information.
When ordering be sure to:
1. List your product, model, year and serial number(s).
2. Check the literature and quantities you want.
3. Enclose full remittance in check or money order (NO C.O.D.’s).

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 CC350

General Maintenance Parts

Engine Parts
PART 350 MAGNUM MPI TOURNAMENT SKI
Oil Filter 14957
Spark Plug 33-59571
Distributor Cap 808483
Ignition Coil 806673
Spark Plug Wire Set 816608A68
Thermostat (160
F) 807252--2
Thermostat Gaskets 27-47510, 27-53045--1
Alternator Belt 57-48120A1
Water Pump Belt 57-13457T
Water Separating Filter 35-807172
Quicksilver Motor Oil 92-816096A12
Storage Seal 92-86145A12
Valvtane Plus 92-17955A12
Gasoline Stabilizer For Marine Engines 92-817529A12
Fuel System Cleaner 92-17885A12
Corrosion Guard Spray 92-815869A12

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 CC178

Literature Order Form

Model _______________ Horsepower______________Serial Number______________ Year_________
Service Manual - shows the complete assembly and disassembly of the engine or stern drive.
Parts Manual - shows the exploded view of the engine or stern drive with corresponding part number.
Operation and maintenance manual (Owner’s Guide) - explains basic operation and maintenance.

Manual Part Number Qty. Price Each Total Price

(Official Use Only)

Service Manual: Engine 90- $30.00

Service Manual: Drive 90- $30.00
Service Manual: Remote Control 90- $30.00
Parts Manual: Engine Only 90- $4.95
Parts Manual: Drive Only 90- $4.95
Operation and Maintenance 90- $5.00
Manual
Sub-Total
* must be collected from customers in all states Sales Tax *
except:
AK, AZ, DE, HI, ID, IA, ME, MI, MT, NV, NH, NY, Ship/Hand**
OR, VT, WV, WY Grand Total
** Orders Totaling:
up to $20.00, add $3.00
20.01 - $50.00, add $4.00
50.01 - up, Free

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 Please Return with Payment to:

Mercury Marine
Attn: Publications Dept.
P.O. Box 1939
Fond du Lac, WI 54936-1939
Ship To: (Please Print or Type - This is your Shipping Label)
Name

Address
City State Zip

METHOD OF PAYMENT: (NO CASH OR C.O.D.)

Personal Check Cashiers Check Money Order

Visa MasterCard
Month/Year

Card Number Expiration Date

Signature Date

( )
Telephone Number

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