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12. TROUBLESHOOTING
PROBLEM
PROBABLE CAUSE
CORRECTIVE ACTION
Engine does not start.
Throttle chock not in the correct
position for the prevailing conditions.
Move throttle choke to correct position
Fuel tank is empty.
Fill tank with fuel: refer to ENGINE OWNERS
MANUAL.
Air cleaner element is dirty.
Clean air cleaner element: refer to ENGINE
OWNERS MANUAL
Spark plug loose.
Tighten spark plug to 25-30Nm.
Spark plug wire loose or
disconnected from plug.
Install spark plug wire on spark plug.
Spark plug gap is incorrect.
Set gap between electrodes at 0.7 to 0.8mm
Spark plug is defective
Install new, correctly gapped plug: refer to
ENGINE OWNERS MANUAL
Carburetor is flooded with fuel
Remove air cleaner element and pull starter rope
continuously until carburetor clears itself and
install air cleaner element.
Faulty ignition module
Contact the service agent.
Engine difficult to start or
loses power.
Dirt, water, or stale fuel tank.
Drain fuel and clean tank. Fill tank with clean,
fresh fuel
Vent hole in fuel tank cap is plugged.
Clean or replace fuel tank cap.
Air cleaner element is dirty.
Clean air cleaner element.
Engine operates
erratically.
Spark plug is defective.
Install new, correctly gapped plug: refer to
ENGINE OWNERS MANUAL
Spark plug gap is incorrect.
Set gap between electrodes at 0.7 to 0.8mm
Air cleaner element is dirty.
Clean air cleaner element: refer to ENGINE
OWNERS MANUAL
Engine idles poorly.
Air cleaner element is dirty.
Clean air cleaner element: refer to ENGINE
OWNERS MANUAL
Air slots in engine shroud are
blocked.
Remove debris from slots.
Cooling fins and air passages under
engine blower housing are blocked.
Remove debris from cooling fins and air
passages.
Engine skips at high
speed.
Gap between electrodes of spark
plug is too close.
Set gap between electrodes at 0.7 to 0.8mm
Engine overheats
Cooling air flow is restricted.
Remove any debris from slots in shroud, blower
housing, air passages
Incorrect spark plug.
For Briggs engine: Install RJ19LMC spark plug
Mower vibrates
abnormally
Cutting assembly is loose.
Tighten blade
Cutting assembly is unbalanced
Balance blade.
16


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