Predator Generators 4000 Watt Portable Generator Owner's Manual & Safety Instructions page 20

Troubleshooting (cont.)
Problem
1. Spark plug cap loose.
2. Incorrect spark plug gap or
3. Defective spark plug cap.
4. Old or low quality gasoline.
Engine misfires
5. Incorrect compression.
1. Low oil shutdown.
2. Fuel tank empty or full of impure or low
Engine stops
suddenly
3. Defective fuel tank cap creating
4. Faulty magneto.
5. Disconnected or improperly
1. Dirty air filter.
Engine stops when
2. Engine running cold.
under heavy load
1. Old or low quality gasoline.
Engine knocks
2. Engine overloaded.
3. Incorrect spark timing, deposit buildup,
1. Impure or low quality gasoline.
2. Engine too cold.
Engine backfires
3. Intake valve stuck or overheated engine.
4. Incorrect timing.
1. Product not plugged in properly.
Product doesn't
2. Circuit Breaker tripped.
have power
3. Product needs service.
1. Problem with appliance.
Product begins to
operate abnormally
2. Rated load capacity exceeded.
Follow all safety precautions whenever diagnosing or servicing the equipment or engine.
Page 20
Possible Causes
damaged spark plug.
quality gasoline.
vacuum, preventing proper fuel flow.
connected spark plug cap.
worn engine, or other mechanical problems.
For Generator technical questions, please call 1-800-444-3353.
For Engine technical questions, please call 1-800-520-0882.
Probable Solutions
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.)
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.
5. Secure spark plug cap.
1. Clean or replace element.
2. Allow engine to warm up prior
to operating equipment.
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.
3. Have qualified technician diagnose
and service engine.
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.
3. Have qualified technician diagnose
and service engine.
4. Check engine timing.
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.
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.
Item 69728 / 69729