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| Trouble |
| Possible Cause |
| Remedy | ||
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| 1. | Spark plug(s) fouled or incorrect type. | 1. | Inspect spark plug(s). Clean or replace | |
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| with recommended type. | |
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| 2. | Fuel system obstructed. | 2. | Check for pinched or kinked fuel line or | |
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| other obstructions in fuel system. | |
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| 3. | Fuel contaminated or stale. | 3. | Fill tank with clean, fresh fuel. | |
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| 4. | Fuel filter clogged. | 4. | Clean or replace filter. | |
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| 5. | Failed ignition parts. | 5. | Have serviced by a Yamaha dealer. | |
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| 6. | Warning system activated. | 6. | Find and correct cause of warning. | |
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| 7. | Spark plug gap incorrect. | 7. | Inspect and adjust as specified. | |
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| 8. | Poor connections or damaged ignition | 8. | Check wires for wear or breaks. | |
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| wiring. |
| Tighten all loose connections. | |
C. Engine idles |
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| Replace worn or broken wires. | |||
9. | Specified engine oil not used. | 9. | Check and replace oil as specified. | ||||
irregularly or stalls. | |||||||
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| 10. | Thermostat faulty or clogged. | 10. | Have serviced by a Yamaha dealer. | |
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| 11. | Carburetor adjustments incorrect. | 11. | Have serviced by a Yamaha dealer. | |
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| 12. | Fuel pump damaged. | 12. | Have serviced by a Yamaha dealer. | |
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| 13. | Air vent screw on the fuel tank closed. | 13. | Open the air vent screw. | |
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| 14. | Choke knob pulled out. | 14. | Return to home position. | |
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| 15. | Motor angle too high. | 15. | Return to normal operating position. | |
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| 16. | Carburetor clogged. | 16. | Have serviced by a Yamaha dealer. | |
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| 17. | Fuel joint connection incorrect. | 17. | Connect correctly. | |
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| 18. | Throttle valve adjustment incorrect. | 18. | Have serviced by a Yamaha dealer. | |
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| 19. | Battery lead disconnected. | 19. | Connect securely. | |
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| 1. | Engine oil level low. | 1. | Fill oil tank with specified engine oil. | |
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| 2. | Specified engine oil not used. | 2. | Check and replace oil with specified | |
D. Warning buzzer |
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sounds or indicator | 3. | Engine oil contaminated or deterio- | 3. | Replace oil with fresh, specified type. | |||
lamp lights. |
| rated. |
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| 4. | Oil filter clogged. | 4. | Have serviced by a Yamaha dealer. | |
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| 5. | Oil feed/injection pump malfunctions. | 5. | Have serviced by a Yamaha dealer. | |
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