Stihl MS 270 User Manual page 15

Condition
Engine stalls at idle speed
MS 270, MS 280
Cause
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
Clean jet bores and ports and blow
clear with compressed air
Set low speed screw (L) correctly
Set idle speed screw (LA) correctly
Clean or renew valve jet
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