23
Problem
Possible Causes Probable Solutions
ENGINE STOPS 
SUDDENLY
2. Fuel tank empty or full of impure or low-quality 
gasoline.
3. Defective fuel tank cap creates a vacuum and 
prevents proper fuel ow.
4. Faulty magneto.
5. Disconnected or improperly connected spark plug 
cap.
2. Fill fuel tank with fresh 87+ octane stabilizer 
treated unleaded gasoline. Do not use gasoline with 
more than 10% ethanol(E15, E20,E85,etc.).
3. Test/replace fuel tank cap.
4. Have qualied technician service magneto.
5. Secure spark plug cap.
1. Dirty air lter
2. Engine running cold.
1. Clean element.
2. Allow the engine to warm up prior to operating 
equipment.
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 stabilizer-
treated unleaded gasoline. Do not use gasoline 
with more than 10% ethanol (E15, E20, E85, 
etc.).
2. Do not exceed the equipment's load rating.
3. Have a qualied technician diagnose and 
service the engine.
1. Impure or low-quality gasoline.
2. Engine too cold.
3. Intake valve stuck or an overheated engine.
4. Incorrect timing.
1. Fill fuel tank with fresh 87+ octane stabilizer 
treated 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 backring.
3. Have a qualied technician diagnose and 
service the engine.
4. Check engine timing.
1. Device not plugged in properly.
2. Circuit Breaker tripped.
3. Product needs service.
1. Turn off and unplug the device, then plug it back 
in again and turn it on.
2. Turn off and unplug the device, reset the Circuit 
Breaker, plug in the device and turn on.
3. Have the product repaired.
Follow all safety precautions whenever diagnosing or servicing the generator or engine.
ENGINE STOPS WHEN 
UNDER HEAVY LOAD
ENGINE KNOCKS
ENGINE BACKFIRES
THE ATTACHED 
DEVICE DOESN'T 
HAVE POWER
Troubleshooting