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Troubleshooting
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41
Problem Cause Remedy
Engine fails to start
2.
Throttle control lever not in correct starting 4.
position.
Fuel tank empty, or stale fuel. 5.
6.
Air or Water is in the fuel sytem.7.
Faulty spark plug(s). 8.
Defective starter solenoid.
Engine flooded.
Engage parking brake. 2.
Connect wire(s) to spark plug(s).
4.
5.
old) gas.
Clean fuel line and replace fuel filter. 6.
7.
Clean, adjust gap or replace plug(s). 8.
Replace the solenoid.
Engine difficult to start
Engine oil viscosity too heavy.2.
Loose or corroded electrical connections.
4.
Clean the fuel filter.
Replace the oil with the proper viscosity.2.
Tighten and/or clean electrical connections.
4.
old) gas.
Engine misses under load
2.
old) gas.
Clean the fuel filter.2.
Engine vapor locks
Fuel tank vent plugged.2.
Dirt in fuel filter.
old) gas.
Clear tank vent.2.
Clean and/or replace fuel filter.
Engine runs unevenly Loose electrical connections.
Throttle cable sticking.2.
Fuel line or fuel filter plugged.
4.
Improper fuel.5.
Air cleaner clogged.6.
Tighten electrical connections.
2.
Clear the fuel line and/or clean the fuel filter.
4.
old) gas.
Replace the fuel with the proper fuel.5.
Clean or replace the air cleaner.6.
Engine overheats Engine oil level low.
Air flow restricted. 2.
Fill crankcase with proper amount and
weight of oil.
Clean grass clippings and debris from around 2.
Engine hesitates at high
Remove spark plug(s) and reset the gap.