22
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 or local dealership.
State of abnormality
Probable cause (malfunction)
Remedy
Engine does not start.
I-O switch is set to STOP.
Set the I-O switch to START.
Failure to operate primer pump.
Push 7 to 10 times.
Low pulling speed of starter rope.
Pull strongly.
Lack of fuel.
Feed fuel.
Incorrect choke position.
Set to “CLOSE” (cold start).
Set to “OPEN” (warm start).
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Replace.
Bent or blocked fuel tube.
Straighten or replace fuel tube.
Deteriorated fuel.
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Replace with new fuel. (Recommended
replacement: 1 month)
Excessive suction of fuel.
Set throttle lever from medium speed to high
speed, and pull starter handle until engine
starts.
Once engine starts, cutting tool
starts rotating. Pay full attention to cutting
tool.
If engine will not start still, remove spark plug,
dry the electrode, and reassemble them as
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Detached plug cap.
Attach securely.
Contaminated spark plug.
Clean.
Abnormal clearance of spark plug.
Adjust clearance.
Abnormality of spark plug.
Replace.
Abnormal carburetor.
Make request for inspection and maintenance.
Starter rope cannot be pulled, or no
compression is felt.
Make request for inspection and maintenance.
Abnormal drive/electric system. (I-O switch
fault, wiring fault, connector fault, etc.)
Make request for inspection and maintenance.
Engine stops soon.
Engine speed does not increase.
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Perform warm-up operation.
Choke lever is set to “CLOSE” although
engine is warmed up.
Set to “OPEN”.
Low idle speed.
Adjust idle speed.
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Replace.
Contaminated or clogged air cleaner.
Clean or replace.
Abnormal carburetor.
Make request for inspection and maintenance.
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Make request for inspection and maintenance.
Abnormal drive/electric system.
Make request for inspection and maintenance.
Metal blade does not rotate.
Stop engine immediately.
Loosened metal blade-tightening nut.
Tighten securely.
Twigs caught by metal blade or dispersion-
preventing cover.
Remove foreign matter.
Abnormal drive system.
Make request for inspection and maintenance.
Main unit vibrates abnormally.
Stop engine immediately.
Broken, bent or worn metal blade.
Replace metal blade.
Loosened metal blade-tightening nut.
Tighten securely.
Shifted convex part of metal blade and metal
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Attach securely.
Abnormal drive system.
Make request for inspection and maintenance.
Metal blade does not stop immediately.
Stop engine immediately.
High idle speed.
Adjust idle speed.
Detached throttle wire.
Attach securely.
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.
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 check items, open the throttle by about 1/3 and start the engine.
If there are abnormality other than this chart, contact Authorized Service Center.
TROUBLESHOOTING
