27
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 Agent 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 OPERATION.
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
Broken 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 lever from medium speed to high
speed, and pull starter handle until engine
starts.
Once engine starts, metal blade
starts rotating. Pay full attention to metal
blade.
If engine will not start still, remove spark plug,
dry the electrode, and reassemble them as
they originally are. Then, start as specified.
Detached plug cap
Attach securely
Contaminated spark plug
Clean
Abnormal clearance of spark plug
Adjust clearance
Other abnormality of spark plug
Replace
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
Contaminated or clogged air cleaner
Clean
Abnormal carburetor
Make request for inspection and maintenance.
Abnormal drive 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
blade support fitting.
Attach securely
Abnormal drive system
Make request for inspection and maintenance.
Metal blade does not stop immediately
Stop engine immediately
High idling rotation
Adjust
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.