Table of Contents
Section 12 Troubleshooting
Symptoms | Probable Causes | Suggested Remedies |
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Engine loses power | Throttle cable is sticking. | Clean and oil throttle cable. Replace |
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| worn or damaged cable. |
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| Choke cable is sticking. | Clean and oil choke cable. Replace |
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| worn or damaged cable. |
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| Spark plugs are defective. | Replace spark plugs. |
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| Spark plugs are fouled. | Clean spark plugs or replace. |
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| Fuel supply is restricted. | Check for dirt in fuel tank. |
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| Fuel line is plugged, pinched, or kinked. | Clean or replace fuel line. |
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| Fuel leaks into the crankcase. | Clean or replace fouled spark plugs. |
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| Verify choke position is not stuck on. |
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| Engine oil level is high. | Drain excess oil, check for gas in the |
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| oil. |
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| Fuel octane is incorrect. | Use unleaded 87 minimum octane. |
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| Throttle cable is faulty or out of | Adjust or replace throttle cable. |
| adjustment. |
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| Air cleaning element is plugged. | Replace or clean air cleaner with air. |
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| Engine is overheating. | See Symptoms for engine |
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| overheating. |
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Engine overheats | Engine cooling fins are plugged. | Allow engine to cool. Clean cooling |
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| fins with high pressure air. |
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| Engine oil level is low. | Add specified engine oil. |
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| Carburetor air intake tube is plugged. | Clean air intake tube. |
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| Air cleaning element is plugged or | Replace or clean air cleaner with air. |
| missing. |
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Engine runs unevenly | Electrical connections are loose. | Reattach electrical connections. |
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| Engine cooling fins are plugged. | Allow engine to cool. Clean cooling |
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| fins with high pressure air. |
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| Throttle cable is sticking. | Clean and oil throttle cable. Replace |
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| worn or damaged cable. |
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| Choke cable is sticking. | Clean and oil choke cable. Replace |
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| worn or damaged cable. |
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| Fuel is stale or dirty. | Replace fuel with new fuel. |
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| Fuel line is plugged. | Clean fuel line. |
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| Fuel type is incorrect. | Use unleaded 87 minimum octane. |
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| (Methanol not allowed). |
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| Fuel leaks into the crankcase. | Clean or replace fouled spark plugs. |
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| Verify choke position is not stuck on. |
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| Spark Plug wiring is defective. | Replace spark plug wiring. |
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| Spark plug is defective. | Replace spark plugs. |
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| Spark plug is fouled. | Clean spark plugs or replace. |
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| Carburetor is not adjusted correctly. | Adjust carburetor. |
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| Air cleaner is plugged. | Replace or clean air cleaner with air. |
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7/01/05 | 4400EX Heavy Duty Off Road Utility Vehicle |