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12 TROUBLES SHOOTING
PROBLEM
PROBABLE CAUSE
CORRECTIVE ACTION
Engine does not
start.
Throttle chock not in the correct
position for the prevailing
conditions.
Move throttle chock 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 25-30 Nm.
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 shots.
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.
Remover any debris from slots in shroud, blower housing, air
passages
Incorrect spark plug.
Install BPR4ES spark plug and cooling fins on engine.
Mower vibrates
abnormally
Cutting assembly is loose.
Tighten blade
Cutting assembly is unbalanced
Balance blade.
17


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