Operators Manual

English – 25
4. TROUBLESHOOTING
4.1 TROUBLESHOOTING GUIDE
Problem Possible Causes Probable Solutions
Engine stops
when under
heavy load
1. Dirty air lter.
2. Engine running cold.
1. Clean or replace element.
2. Allow engine to warm up prior to operat-
ing equipment.
Engine misres
1. Spark plug cap loose.
2. Incorrect spark plug gap or dam-
aged 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 stabilizer
treated unleaded gasoline.
Do not use gasoline with more than
10% ethanol (E15, E20, E85, etc.).
5. Diagnose and repair compression.
Engine stops
suddenly
1. Low oil shutdown.
2. Fuel tank empty or full of impure or
low quality gasoline.
3. Defective fuel tank cap creating
vacuum, preventing proper fuel ow
4. Faulty magneto.
5. Disconnected or improperly con-
nected spark plug cap.
1. Fill engine oil to proper level. Check
engine oil before EVERY use.
2. Fill fuel tank with fresh 87+ octane stabi-
lizer treated unleaded gasoline. Do not use
gasoline with more than
10% ethanol (E15, E20, E85, etc.).
3. Test/replace fuel tank cap.
4. Have qualied technician service mag-
neto.
5. Secure spark plug cap.
Engine knocks 1. Old or low quality gasoline.
2. Engine overloaded.
3. Incorrect spark timing, deposit
buildup, worn engine, or other me-
chanical problems.
1. Fill fuel tank with fresh 87+ octane stabi-
lizer treated 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 qualied technician diagnose and
service engine.
Engine backres 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 stabi-
lizer 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 backring.
3. Have qualied technician diagnose and
service engine.
4. Check engine timing.