Online version - not for reprint
14 MS 341, MS 361, MS 361 C
Condition Cause Remedy
Engine will not idle,
idle speed too high
Throttle shutter opened too wide by
idle speed screw (LA)
Reset idle speed screw (LA)
correctly
Oil seals/crankcase leaking Seal or replace oil seals/
crankcase
Engine stalls at idle speed Idle jet bores or ports blocked Clean the carburetor
Idle jet too rich or too lean Set low speed screw (L)
correctly
Setting of idle speed (LA)
incorrect – throttle shutter
completely closed
Set idle speed screw (LA)
correctly
Small plastic plate in valve jet
does not close
Clean or renew valve jet
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