Stihl MS 441 Manual page 17

Condition
Engine will not idle, idle speed too
high
Engine stalls at idle speed
16
Cause
Throttle shutter opened too wide by
idle speed screw LA
Oil seals / crankcase leaking
Air flap dirty – air flap does not
close
Air flap stiff
Throttle cable stiff – throttle shutter
does not close
Idle jet bores or ports blocked
Idle jet too rich or too lean
Setting of the idle speed screw
incorrect – throttle shutter
completely closed
Remedy
Correct setting of idle speed
screw LA
Seal or replace oil seals /
crankcase
Clean air flap, install new
carburetor if necessary
Check carburetor, replace if
necessary
Fit new throttle cable
Clean the carburetor
Set low speed screw L correctly
Set idle speed screw LA correctly
MS 441, MS 441 C