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26
TROUBLESHOOTING
Before making a request for repairs, check a trouble for 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 Agent or local dealership.
State of abnormality
Probable cause (malfunction)
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
replacement: 1 month).
Excessive suction of fuel.
Set throttle control to medium or high speed,
and pull starter handle until engine starts.
Once engine starts, saw chain starts rotating.
Pay full attention to saw chain.
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.
Chain oil is not supplied.
The oil tank is empty.
Fill the oil tank with chain oil.
The chain oil feed port is dirty.
Clean the chain oil feed port on the unit and
guide bar.
The adjusting screw of the chain oil feed rate
is improperly set.
Set the adjusting screw properly.
Saw chain does not rotate
Stop engine immediately
The guide bar is bent or damaged.
Replace the guide bar.
Foreign matter caught by saw chain.
Remove foreign matter while the engine
stopped.
Abnormal drive system.
Make request for inspection and maintenance.
The equipment vibrates abnormally
Stop engine immediately
Broken, bent or worn guide bar.
Replace guide bar.
Loosened saw chain.
Adjust the saw chain tension.
Abnormal drive system.
Make request for inspection and maintenance.
Saw chain does not stop
Stop engine immediately
High idling rotation.
Adjust idle speed.
Throttle control wire problem.
Ask service center to replace it.
Abnormal drive system.
Make request for inspection and maintenance.
Engine does not stop
Run engine at idling, and set choke lever
to CLOSE
Detached connector to the I-O switch.
Attach securely.
Abnormal electric system.
Make request for inspection and maintenance.
When the engine does not start after warm-up operation:
If there is no abnormality found for the checked items, open the throttle by about 1/3 and start the engine.