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Table of Contents

Section 11: Troubleshooting

Symptoms Engine loses power

Probable Causes Throttle cable is sticking.

Suggested Remedies

Clean and oil throttle cable. Replace worn or damaged cable.

Choke cable is sticking.

Clean and oil choke cable. Replace worn or damaged cable.

Spark plugs are defective. Spark plugs are fouled. Fuel supply is restricted. Fuel line is plugged, pinched, or kinked. Fuel leaks into the crankcase.

Replace spark plugs. Clean spark plugs or replace. Check for dirt in fuel tank. Clean or replace fuel line.

Clean or replace fouled spark plugs. Verify choke position is not stuck on.

Engine oil level is high.

Drain excess oil, check for gas in the oil.

Fuel octane is incorrect.

Throttle cable is faulty or out of adjustment.

Use unleaded 87 minimum octane. Adjust or replace throttle cable.

Engine overheats

Air cleaning element is plugged. Engine is overheating.

Replace or clean air cleaner with air.

See Symptoms for engine overheating.

Engine cooling fins are plugged.

Allow engine to cool. Clean cooling fins with high pressure air.

Engine oil level is low. Carburetor air intake tube is plugged.

Air cleaning element is plugged or missing.

Add specified engine oil. Clean air intake tube. Replace or clean air cleaner with air.

Engine runs unevenly

Electrical connections are loose. Engine cooling fins are plugged.

Reattach electrical connections.

Allow engine to cool. Clean cooling fins with high pressure air.

Throttle cable is sticking.

Clean and oil throttle cable. Replace worn or damaged cable.

Choke cable is sticking.

Clean and oil choke cable. Replace worn or damaged cable.

Fuel is stale or dirty. Fuel line is plugged. Fuel type is incorrect.

Replace fuel with new fuel. Clean fuel line.

Use unleaded 87 minimum octane. (Methanol not allowed).

Fuel leaks into the crankcase.

Clean or replace fouled spark plugs. Verify choke position is not stuck on.

Spark Plug wiring is defective. Spark plug is defective. Spark plug is fouled. Carburetor is not adjusted correctly. Air cleaner is plugged.

Replace spark plug wiring. Replace spark plugs. Clean spark plugs or replace. Adjust carburetor. Replace or clean air cleaner with air.

42

4400EX Heavy Duty Off Road Utility Vehicle 720-051M

7/14/08

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