Dolmar MS-245.4 C - Manual (Page 24)

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