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For equipment technical questions, please call 1-888-866-5797.
For engine technical questions, please call 1-800-520-0882.
ITEM 61924
SAFETY
SETUP
O
PERA
TION
M
AINTENANCE
Problem
Possible Causes
Probable Solutions
Engine misfires
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/oil mixture.
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/oil mixture.
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
suddenly
1. Fuel tank empty or full of impure or low
quality gasoline/oil mixture.
2. Defective fuel tank cap creating vacuum,
preventing proper fuel flow.
3. Faulty magneto.
4. Disconnected or improperly
connected spark plug cap.
1. Fill fuel tank with fresh 87+ octane
unleaded gasoline/oil mixture.
Do not use gasoline with more than
10% ethanol (E15, E20, E85, etc.).
2. Test/replace fuel tank cap.
3. Have qualified technician service magneto.
4. Secure spark plug cap.
Engine stops when
under heavy load
1. Dirty air filter
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/oil mixture.
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/oil mixture.
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.
Engine backfires
1. Impure or low quality gasoline/oil mixture.
2. Engine too cold.
3. Intake valve stuck or overheated engine.
4. Incorrect timing.
1. Fill fuel tank with fresh 87+ octane
unleaded gasoline/oil mixture.
Do not use gasoline with more than
10% ethanol (E15, E20, E85, etc.).
2. Use cold weather fuel additives
to prevent backfiring.
3. Have qualified technician
diagnose and service engine.
4. Check engine timing.
Performance
decreases
over time
1. Chisel dull or damaged.
2. Internal lubrication cold.
1. Keep cutting chisels sharp. Sharpen
or replace as needed.
2. Allow tool to operate with no load
for 5 minutes before use.
Follow all safety precautions whenever diagnosing or servicing the equipment or engine.
