Stihl MS 341 Shop Manual page 15

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