21
Problem Possible Causes Probable Solutions
1. Spark plug cap loose.
2. Incorrect spark plug gap or
damaged spark plug.
3. Defective spark plug cap.
4. Old or low quality gasoline.
5. Incorrect compression.
1. Check wire connections.
2. Re-gap or replace spark plug.
3. Replace spark plug cap.
4. Use only fresh 87+ octane unleaded
gasoline. Do not use gasoline with more
than 10% ethanol (E15, E20, E85, etc.).
5. Diagnose and repair compression.
(Use Engine will not start:
COMPRESSION RELATED section.)
Engine stops
Engine misfires
suddenly
1. Low oil shutdown.
2. Fuel tank empty or full of impure
or low quality gasoline.
3. Defective fuel tank cap creating
4. Faulty magneto.
vacuum, preventing proper fuel
flow.
5. Disconnected or improperly
connected spark plug cap.
1. Fill engine oil to proper level. Check
engine oil before EVERY use.
2. Fill fuel tank with fresh 87+ octane
unleaded gasoline. Do not use gasoline
with more than 10% ethanol (E15, E20,
E85, etc.).
3. Test/replace fuel tank cap.
4. Have qualified technician service
magneto.
3. Have qualified technician diagnose and
5. Secure spark plug cap.
Engine stops when
under heavy load
2. Engine running cold.
1. Dirty air filter.
1. Clean or replace element.
2. Allow engine to warm up prior
to operating equipment.
Engine knocks
Engine backfires
1. Old or low quality gasoline.
2. Engine overloaded.
3. Incorrect spark timing, deposit
buildup, worn engine, or other
mechanical problems.
1. Fill fuel tank with fresh 87+ octane
unleaded gasoline.
Do not use gasoline with more than
10% ethanol (E15, E20, E85, etc.).
2. Do not exceed equipment’s load rating.
service engine.
3. Have qualified technician diagnose and
service engine.
1. Impure or low quality gasoline.
2. Engine too cold.
3. Intake valve stuck or overheated
engine.
4. Incorrect timing.
1. Fill fuel tank with fresh 87+ octane
unleaded gasoline.
Do not use gasoline with more than
10% ethanol (E15, E20, E85, etc.).
2. Use cold weather fuel and oil additives
to prevent backfiring.
4. Check engine timing.
Product doesn’t
have power.
1. Product not plugged in properly.
2. Circuit Breaker tripped.
3. Product needs service.
1. Turn off and unplug the product, then
plug it back in again and turn on.
2. Turn off and unplug product, Reset Circuit
Breaker. Plug in product and turn on.
3. Have product repaired.
Product begins to
operate abnormally.
1. Problem with appliance.
2. Rated load capacity exceeded.
1. Immediately unplug appliance. Have
appliance repaired by a qualified
technician, or replace appliance.
2. Lower the number of items plugged into
the generator to stay within the rated
capacity, or use a more powerful
generator.
Troubleshooting (cont.)
Follow all safety precautions whenever diagnosing or servicing
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