12
TROUBLESHOOTING
Before making a request for repairs, check for trouble by yourself. If any abnormality is found, control your machine
according to the description of this manual. Never tamper or dismount any part contrary to the description. For repairs,
contact authorized service center.
Trouble
Cause
Remedy
Engine does not start
Failure to operate primer
pump.
Push 7 to 10 times.
Low pulling speed of starter
rope.
Pull strongly.
Lack of fuel.
Feed fuel.
Clogged fuel filter.
Clean it.
Disconnected fuel tube.
Connect fuel tube properly.
Bent fuel tube.
Straighten fuel tube.
Deteriorated fuel.
Deteriorated fuel makes starting more difficult.
Replace with new fuel. (Recommended replace-
ment: 1 month).
Excessive suction of fuel.
Set throttle lever to medium or “H” position, and pull
starter handle until engine starts. If engine still does
not start, remove spark plug, dry the electrode, and
reassemble them as they originally were. Then,
start as specified.
Detached plug cap.
Attach securely.
Contaminated spark plug.
Clean it.
Abnormal clearance of spark
plug.
Adjust clearance.
Other abnormality of spark
plug.
Replace it.
Abnormal carburetor.
Make request for inspection and maintenance.
Starter rope cannot be pulled. Make request for inspection and maintenance.
Abnormal drive system.
Make request for inspection and maintenance.
Engine stops soon
Engine speed does not
increase
Insufficient warm-up.
Perform warm-up operation.
Choke lever is set to “CLOSE”
although engine is warmed
up.
Set to “OPEN”.
Clogged fuel filter.
Clean it.
Contaminated or clogged air
cleaner.
Clean it.
Abnormal carburetor.
Make request for inspection and maintenance.
Abnormal drive system.
Make request for inspection and maintenance.
Pump does not work.
Sticking of impeller.
Ask your local Makita authorized service center to
repair it.