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13. TROUBLESHOOTING
PROBLEM PROBABLE CAUSE CORRECTIVE ACTION
Engine does
not start.
Choke lever in wrong
position.
Move lever to correct position: for starting.
for operation.
Fuel tank is empty. Fill tank with fuel.
Air cleaner element is dirty. Clean air cleaner element.
Spark plug loose. Tighten spark plug.
Spark plug wire loose or
disconnected from plug.
Install spark plug wire on spark plug.
Spark plug gap is incorrect. Set gap between electrodes.
Spark plug is defective. Install new, correctly gapped plug.
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 agency.
Engine difficult
to start or loses
power.
Dirt or water in fuel tank. Drain fuel and clean tank. Fill tank with clean, fresh fuel.
Ventilation hole in fuel tank
cap is clogged.
Clean or replace fuel tank cap.
Air cleaner element is dirty. Clean air cleaner element.
The carburettor is clogged.
Wrong or dirty fuel has
been used.
Remove the spark plug. Drain the fuel tank. Clean the
spark plug and the carburettor. This should be done by an
authorized motorist workshop.
Engine
operates
erratically.
Spark plug is defective. Install new, correctly gapped plug.
Spark plug gap is incorrect. Set gap between electrodes.
Air cleaner element is dirty. Clean air cleaner element.
Engine idles
poorly.
Air cleaner element is dirty. Clean air cleaner element.
Air slots in engine shroud
are blocked.
Remove dirt from slots.
Cooling fins under engine
blower housing are blocked.
Remove dirt from cooling fins and air passages.
Engine skips at
high speed.
Gap between electrodes of
spark plug is too close.
Set gap between electrodes.
Engine
overheats
Cooling air flow is restricted.
Remove any debris from slots in shroud, blower housing,
air passages.
Incorrect spark plug. Install original spark plug and cooling fins on engine.
Mower vibrates
abnormally
Cutting assembly is loose. Tighten blade
Cutting assembly is
unbalanced.
Exchange blade.
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