5-2
E
C. Engine idles
irregularly or stalls.
Trouble Possible Cause Remedy
8. Poor connections or damaged ignition
wiring.
9. Specified engine oil not used.
10. Thermostat faulty or clogged.
11. Carburetor adjustments incorrect.
12. Fuel pump damaged.
13. Air vent screw on the fuel tank closed.
14. Choke knob pulled out.
15. Motor angle too high.
16. Carburetor clogged.
17. Fuel joint connection incorrect.
18. Throttle valve adjustment incorrect.
19. Battery lead disconnected.
8. Check wires for wear or breaks.
Tighten all loose connections.
Replace worn or broken wires.
9. Check and replace oil as specified.
10. Have serviced by a Yamaha dealer.
11. Have serviced by a Yamaha dealer.
12. Have serviced by a Yamaha dealer.
13. Open the air vent screw.
14. Return to home position.
15. Return to normal operating position.
16. Have serviced by a Yamaha dealer.
17. Connect correctly.
18. Have serviced by a Yamaha dealer.
19. Connect securely.
D. Warning buzzer
sounds or indicator
lamp lights.
1. Cooling system clogged.
2. Heat range of spark plug incorrect.
3. Specified engine oil not used.
4. Engine oil contaminated or
deteriorated.
5. Load on boat improperly distributed.
6. Water pump/thermostat faulty.
1. Check water intake for restriction.
2. Inspect spark plug and replace it with
recommended type.
3. Check and replace oil with specified
type.
4. Replace oil with fresh, specified type.
5. Distribute load to place boat on an
even plane.
6. Have serviced by a Yamaha dealer.
1. Propeller damaged.
2. Propeller pitch or diameter incorrect.
3. Trim angle incorrect.
4. Motor mounted at incorrect height on
transom.
5. Warning system activated.
6. Boat bottom fouled with marine growth.
7. Spark plug(s) fouled or incorrect type.
8. Weeds or other foreign matter tangled
on gear housing.
9. Fuel system obstructed.
10. Fuel filter clogged.
11. Fuel contaminated or stale.
12. Spark plug gap incorrect.
13. Poor connections or damaged ignition
wiring.
1. Have propeller repaired or replaced.
2. Install correct propeller to operate
outboard at its recommended speed
(r/min) range.
3. Adjust trim angle to achieve most
efficient operation.
4. Have motor adjusted to proper
transom height.
5. Find and correct cause of warning.
6. Clean boat bottom.
7. Inspect spark plug(s). Clean or
replace with recommended type.
8. Remove foreign matter and clean
lower unit.
9. Check for pinched or kinked fuel line
or other obstructions in fuel system.
10. Clean or replace filter.
11. Fill tank with clean, fresh fuel.
12. Inspect and adjust as specified.
13. Check wires for wear or breaks.
Tighten all loose connections.
Replace worn or broken wires.
E. Engine power loss.
60H-9-E1-5 3/4/02 11:41 AM Page 3
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