24
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.
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.
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
Broken fuel tube
Straighten fuel tube
Deteriorated fuel
Deteriorated fuel makes starting more difficult.
Replace with new one. (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, cutter blade
starts rotating. Pay full attention to cutter
blade.
If engine will not start still, remove spark plug,
make electrode dry, 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.
Cutter blade does not rotate
Loosened cutter blade-tightening nut
Tighten securely
Twigs caught by cutter blade or dispersion-
preventing cover.
Remove foreign matter
Abnormal drive system
Make request for inspection and maintenance.
Main unit vibrates abnormally
Broken, bent or worn cutter blade
Replace cutter blade
Loosened cutter blade-tightening nut
Tighten securely
Shifted convex part of cutter blade and cutter
blade support fitting.
Attach securely
Abnormal drive system
Make request for inspection and maintenance.
Cutter blade does not stop immediately
High idling rotation
Adjust
Detached throttle wire
Attach securely
Abnormal drive system
Make request for inspection and maintenance.
Engine does not stop
Detached connector
Attach securely
Abnormal electric system
Make request for inspection and maintenance.
Stop engine immediately
Stop engine immediately
Stop engine immediately
Run engine at idling, and set choke lever
to CLOSE
