Makita PLM4630N2 Instruction Manual page 18

Transport
Turn the engine off and allow the engine to cool down.
Then disconnect the spark plug wire and empty the fuel
tank according to the instructions in the engine manual.
12. TROUBLESHOOTING
PROBLEM
Engine does not start.
Engine difficult to start or
loses power.
Engine operates erratically.
Engine idles poorly.
Engine skips at high speed.
Engine overheats.
Mower vibrates abnormally.
13. ENVIRONMENT
Should your machine need replacement after extended
use, do not put it in the domestic waste but dispose of it in
an environmentally safe way.
18
PROBABLE CAUSE
Throttle choke not in the correct
position for the prevailing conditions.
Fuel tank is empty.
Air cleaner element is dirty.
Spark plug loose.
Spark plug wire loose or
disconnected from plug.
Spark plug gap is incorrect.
Spark plug is defective.
Carburetor is flooded with fuel.
Faulty ignition module.
Dirt, water, or stale fuel tank.
Vent hole in fuel tank cap is plugged. Clean or replace fuel tank cap.
Air cleaner element is dirty.
Spark plug is defective.
Spark plug gap is incorrect.
Air cleaner element is dirty.
Air cleaner element is dirty.
Air slots in engine shroud are
blocked.
Cooling fins and air passages under
engine blower housing are blocked.
Gap between electrodes of spark
plug is too close.
Cooling air flow is restricted.
Incorrect spark plug.
Cutting assembly is loose.
Cutting assembly is unbalanced.
Ensure not to bend or damage the cutter when pushing
the lawn mower over obstacles.
CORRECTIVE ACTION
Move throttle choke to correct position.
Fill tank with fuel: refer to ENGINE OWNERS
MANUAL.
Clean air cleaner element: refer to ENGINE
OWNERS MANUAL.
Tighten spark plug to 25-30 Nm.
Install spark plug wire on spark plug.
Set gap between electrodes at 0.7 to 0.8 mm.
Install new, correctly gapped plug: refer to
ENGINE OWNERS MANUAL.
Remove air cleaner element and pull starter rope
continuously until carburetor clears itself and
install air cleaner element.
Contact the service agent.
Drain fuel and clean tank. Fill tank with clean, fresh
fuel.
Clean air cleaner element.
Install new, correctly gapped plug: refer to
ENGINE OWNERS MANUAL.
Set gap between electrodes at 0.7 to 0.8 mm.
Clean air cleaner element: refer to ENGINE
OWNERS MANUAL.
Clean air cleaner element: refer to ENGINE
OWNERS MANUAL.
Remove debris from slots.
Remove debris from cooling fins and air passages.
Set gap between electrodes at 0.7 to 0.8 mm.
Remove any debris from slots in shroud, blower
housing, air passages.
Install original spark plug and cooling fins on
engine.
Tighten blade.
Balance blade.