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Page 16 For technical questions, please call 1-800-520-0882. Vertical Engine
Problem Possible Causes Probable Solutions
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
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.
3. Test/replace fuel tank cap.
4. Have qualied technician service magneto.
5. Secure spark plug cap.
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 operating equipment.
Engine knocks 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.
2. Do not exceed equipment’s load rating.
3. Have qualied technician
diagnose and service engine.
Engine backres 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.
2. Use cold weather fuel and oil
additives to prevent backring.
3. Have qualied technician
diagnose and service engine.
4. Check engine timing.
Follow all safety precautions whenever diagnosing or servicing the equipment or engine.
SAFETY OPERATION MAINTENANCESETUP