Stihl MS 200 Service Manual page 16

Condition
Engine will not idle, idle speed too
high
Engine stalls at idle speed
MS 200, MS 200 T
Cause
Throttle shutter opened too wide by
idle speed screw LA
Oil seals/crankcase leaking
Idle jet bores or ports blocked
Setting of low speed screw too rich
or too lean
Setting of idle speed screw LA
incorrect – throttle shutter
completely closed
Tank vent faulty
Leak in fuel hose between tank and
fuel pump
Remedy
Reset idle speed screw LA
correctly
Seal or replace oil seals/crankcase
Clean the carburetor
Reset low speed screw L correctly
Reset idle speed screw LA
correctly
Replace tank vent
Seal connections or install new fuel
hose
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