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ITEM 62323
SAFETY
SETU
p
Op
ERA
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.
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.
(Use
Engine will not start:
COMpRESSION RELATED
section.)
Engine stops
suddenly
1. Fuel tank empty or full of impure or low
quality gasoline.
2. Low oil shutdown.
3. Defective fuel tank cap creating vacuum,
preventing proper fuel flow.
4. Faulty magneto.
5. Disconnected or improperly
connected spark plug cap.
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. Fill engine oil to proper level.
Check engine oil before EVERY use.
3. Test/replace fuel tank cap.
4. Have qualified technician service magneto.
5. Secure spark plug cap.
Engine stops when
under heavy load
1. Dirty air filter
2. Engine running cold.
1. Clean 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
stabilizer-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 qualified technician
diagnose and service engine.
Engine backfires
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
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 backfiring.
3. Have qualified technician
diagnose and service engine.
4. Check engine timing.
Chipping action slow,
or Engine stalling
1. Branch diameter too thick.
2. Throttle set too low.
1. Do not process branches over 3" diameter.
2. Adjust throttle to increase Engine speed.
Branch vibrates and
moves excessively
when chipping
1. Branches are too hard and/or dried out.
2. Chipping blades are dull or damaged.
1. Material is not suitable for chipping.
2. Have qualified technician
service Chipper/Shredder.
Engine runs but no
material is processed
1. Chipper/Shredder is jammed.
2. Throttle set too low.
1. Clear all debris out of the Main
Housing and discharge port.
2. Adjust throttle to increase Engine speed.
Unusual noise and/or
vibration during use
1. Rotor Assembly area clogged with material.
2. Hammers loose, damaged,
or obstructed by debris.
1. Stop adding material to Hopper/
Chipper Chute–allow Chipper/Shredder
to clear itself before continuing.
2. Have qualified technician
service Chipper/Shredder.
Follow all safety precautions whenever diagnosing or servicing the equipment or engine.
