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| Trouble |
| Possible Cause |
| Remedy | ||
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| 1. | Cooling system clogged. | 1. | Check water intake for restriction. | |||
| 2. | Engine oil level low. | 2. | Fill oil tank with specified engine | |||
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| oil. | |
| 3. | Heat range of spark plug incorrect. | 3. | Inspect spark plug and replace it | |||
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| with recommended type. | |
| 4. | Specified engine oil not used. | 4. | Check and replace oil with | |||
D. Warning buzzer |
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| specified type. | |||
5. | Engine oil contaminated or | 5. | Replace oil with fresh, specified | ||||
sounds or | |||||||
| deteriorated. |
| type. | ||||
indicator lamp |
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6. | Oil filter clogged. | 6. | Have serviced by a Yamaha | ||||
lights. | |||||||
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| dealer. | ||||
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| 7. | Oil feed/injection pump | 7. | Have serviced by a Yamaha | |||
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| malfunctions. |
| dealer. | |
| 8. | Load on boat improperly distributed. | 8. | Distribute load to place boat on an | |||
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| even plane. | |
| 9. | Water pump/thermostat faulty. | 9. | Have serviced by a Yamaha | |||
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| dealer. | |
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| 1. | Propeller damaged. | 1. | Have propeller repaired or | |||
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| replaced. | |
| 2. | Propeller pitch or diameter incorrect. | 2. | Install correct propeller to operate | |||
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| outboard at its recommended | |
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| speed (r/min) range. | |
| 3. | Trim angle incorrect. | 3. | Adjust trim angle to achieve most | |||
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| efficient operation. | |
| 4. | Motor mounted at incorrect height | 4. | Have motor adjusted to proper | |||
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| on transom. |
| transom height. | |
| 5. | Warning system activated. | 5. | Find and correct cause of warning. | |||
E. Engine power loss. | 6. | Boat bottom fouled with marine | 6. | Clean boat bottom. | |||
| growth. |
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| 7. | Spark plug(s) fouled or incorrect | 7. | Inspect spark plug(s). Clean or | |||
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| type. |
| replace with recommended type. | |
| 8. | Weeds or other foreign matter | 8. | Remove foreign matter and clean | |||
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| tangled on gear housing. |
| lower unit. | |
| 9. | Fuel system obstructed. | 9. | Check for pinched or kinked fuel | |||
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| line or other obstructions in fuel | |
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| system. | |
| 10. | Fuel filter clogged. | 10. | Clean or replace filter. | |||
| 11. | Fuel contaminated or stale. | 11. | Fill tank with clean, fresh fuel. | |||
| 12. | Spark plug gap incorrect. | 12. | Inspect and adjust as specified. | |||
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