Problem |
| Cause |
| Remedy |
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Engine Idles rough | 1. | Spark plug(s) fouled, faulty or gap too wide. | 1. | Replace spark plug(s). Set plug gap. |
| 2. | Dirty air cleaner. | 2. | Replace air filter. |
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Engine fumes are colored | 1. | Fuel quality is poor. | 1. | Replace the poor fuel with the proper fuel. |
(Black) | 2. | Too much oil. | 2. | Drain oil until the proper level is reached. |
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| 3. | The air cleaner is clogged. | 3. | Clean or replace the air filter. |
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Engine fumes are colored | 1. | The inside of exhaust muffler is dumped with | 4. | Continue to run the engine to burn off the |
(Blue white) |
| fuel. |
| fuel. |
| 2. | Injection nozzle trouble. | 5. | Clean the injection nozzle. |
| 3. | Poor quality fuel. | 6. | Replace the fuel with the proper fuel. |
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Engine overheats | 1. | Engine overloaded. | 1. | Reduce the load. |
| 2. | Low coolant level. | 2. | Fill the coolant to the proper level. |
| 3. | Dirty radiator core or grill screen. | 3. | Clean the radiator core and/or grill screen. |
| 4. | Coolant flow route corroded. | 4. | Repair the coolant flow route, |
| 5. | Air cleaner element missing or plugged. | 5. | Replace or clean the air element. |
| 6. | Engine oil low. | 6. | Fill the oil to the proper level. |
| 7. | Engine operated too long at slow engine | 7. | Operate the engine at the correct/higher |
|
| speed. |
| speed. |
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Engine loses power | 1. | Engine overheating. | 1. | See “Engine overheats” above. |
| 2. | Too much oil in in the engine. | 2. | Drain oil until the correct level is attained. |
| 3. | Fuel supply being restricted. | 3. | Check the fuel lines. |
| 4. | Fuel filter plugged. | 4. | Clean out the filter. |
| 5. | Fuel line pinched or kinked. | 5. | Repair and/or replace the fuel lines. |
| 6. | Insufficient or dirty fuel. | 6. | Fill tank with clean, fresh (less than 30 days |
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| old) gas. |
| 7. | Air cleaner plugged. | 7. | Clean out the air cleaner. |
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Starter does not work | 1. | Loose or corroded connections. | 1. | Repair or replace the connections. |
| 2. | Low battery output. | 2. | Charge or replace the battery. |
| 3. | Sulfate or worn out battery. | 3. | Clean the battery terminals or replace the |
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| battery. |
| 4. | Faulty starter. | 4. | Replace the starter. |
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Starter cranks slowly | 1. | Low battery output. | 1. | Charge or replace the battery. |
| 2. | Sulfated or worn out batter. | 2. | Clean the battery terminals or replace the |
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| battery. |
| 3. | Engine oil too heavy. | 3. | Drain the oil and replace with a lighter |
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| engine oil. |
| 4. | Loose or corroded connections. | 4. | Repair or replace the connections. |
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42Section 9 — Troubleshooting