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State of abnormality Probable cause (malfunction) Remedy
Loosened cutter blade-tightening
nut
Tighten securely
Twigs caught by cutter blade or
dispersion-preventing cover
Remove foreign matter
Cutter blade does not
rotate
Abnormal drive system Make request for inspection and
maintenance.
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
Main unit vibrates
abnormally.
Abnormal drive system Make request for inspection and
maintenance
High idling rotation Adjust
Detached throttle wire Attach securely
Cutter blade does not
stop immediately.
Abnormal drive system Make request for inspection and
maintenance
Detached connector Attach securely
Abnormal electric system Make request for inspection and
maintenance.
Engine does not stop.
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.
Stop engine
immediatel
y
Stop engine
immediately
Stop engine
immediatel
y
Run engine at idling,
and set choke lever
to
C
L
OS
E.