McCulloch M48 Benutzerhandbuch

2

Engine does not start.

Throttle not in CHOKE position.

Move throttle to CHOKE

Fuel tank is empty.

Fill tank with fuel.

Air cleaner element is dirty.

Clean air cleaner element.

Spark-plug loose.

Tighten spark-plug to 25-30 N•m.

Spark-plug leads loose or disconnect 

from plug

Install spark-plug lead on spark plug.

Spark-plug gap is incorrect.

Set gap between electrodes at

0.6 to 0.7mm.

Spark-plug is defective.

Install new, correctly gapped plug.

Carburetor is flooded with fuel.

Remove spark plug lead and remove 

plug. Switch fuel tap off. Pull starter 

rope 6 times to clear cylinder of fuel. 

Clean and dry spark plug,then reinstall.

Faulty ignition module.

Contact the service agent.

Engine difficult to start 

or losses 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.

Spark-plug gap is incorrect.

Set gap between electrodes at

0.6 to 0.7mm.

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 debris from shots.

Cooling fins and air passages under 

engine fan housing are blocked.

Remove debris from cooling fins and air 

passages.

Engine skips at speed. Gap between electrodes or  

spark-plug is too close.

Set gap between electrodes at high 0.7 

to .08mm

Engine overheats.

Cooling air flow is restricted.

Remove any debris from slots in 

shroud, blower housing, air passages 

and cooling fins on engine.

Incorrect spark-plug.

Install correct spark plug.

Mower vibrates 

abnormally.

Cutting assembly is loose.

Check and tighten blade and cutting 

plate bolts.

Cutting assembly is unbalanced.

Check blade and cutting plate for 

damaged wear. Replace all damaged or 

worn components.