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