E
Trouble
Possible Cause
Remedy
1.
2.
Propeller damaged.
1. Have propeller repaired or replaced.
Propeller pitch or diameter incorrect.
Trim angle incorrect.
2. Install correct propeller to operate out-
board at its recommended speed (r/min)
range.
3.
4.
3. Adjust trim angle to achieve most effi-
cient operation.
Motor mounted at incorrect height on 4. Have motor adjusted to proper transom
transom.
height.
5.
6.
Boat bottom fouled with marine growth.
Spark plug(s) fouled or incorrect type.
5. Clean boat bottom.
6. Inspect spark plug(s). Clean or replace
with recommended type.
7.
8.
Weeds or other foreign matter tangled 7. Remove foreign matter and clean lower
on gear housing. unit.
Fuel system obstructed.
8. Check for pinched or kinked fuel line or
other obstructions in fuel system.
D. Engine power loss.
9.
10.
11.
12.
Fuel filter clogged.
9. Clean or replace filter.
Fuel contaminated or stale.
Spark plug gap incorrect.
10. Fill tank with clean, fresh fuel.
11. Inspect and adjust as specified.
Poor connections or damaged ignition 12. Check wires for wear or breaks.
wiring.
Tighten all loose connections.
Replace worn or broken wires.
13.
14.
Failed ignition parts.
13. Have serviced by a Yamaha dealer.
Specified engine oil not used.
14. Check and replace oil with specified
type.
15.
16.
17.
Thermostat faulty or clogged.
Air vent screw closed.
15. Have serviced by a Yamaha dealer.
16. Open the air vent screw.
Heat range of spark plug incorrect.
17. Inspect spark plug and replace it with
recommended type.
1.
2.
3.
Propeller damaged.
1. Have propeller repaired or replaced.
2. Have serviced by a Yamaha dealer.
Propeller shaft damaged.
Weeds or other foreign matter tangled 3. Remove and clean propeller.
on propeller.
E. Engine vibrates
excessively.
4.
5.
Clamp screw is loose.
4. Tighten the clamp screw.
Steering pivot loose or damaged.
5. Tighten or have serviced by a Yamaha
dealer.
5-3
| Categories | Yamaha Outboard Manuals |
|---|---|
| Document Type | Boat Motor Manual Free Download. Marine Operator's Boating Guide. |
| Tags | Yamaha 2.5C |
| Model Year | 2004 |
| Download File |
|
| Language | English |
| Product Brand | Yamaha Motor. Yamaha Motor Corporation, USA - Support Customer Relations for US: 1-800-962-7926
Yamaha Boats: 1-800-962-7926 Yamaha Outboard Customer Relations: 1-866-894-1626 , Yamaha Outboard |
| Document File Type | |
| Publisher | yamaha-motor.com |
| Wikipedia's Page | Yamaha Motor Company |
| Copyright | Attribution Non-commercial |
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