Stihl MS 461 - Page 15

14 MS 461, MS 461-R
Condition Cause Remedy
Engine will not idle, idle speed too
high
Throttle shutter opened too wide by
idle speed screw (LA)
Reset idle speed screw (LA)
correctly
Oil seals/crankcase leaking Seal oil seals / crankcase, replace if
necessary
Throttle shutter does not close Install new carburetor
Engine stops while idling Idle jet bores
or ports blocked
Clean the carburetor
Low speed screw too rich or
too lean
Reset low speed screw (L)
correctly
Setting of idle speed screw LA
incorrect – throttle shutter
completely closed
Reset idle speed screw (LA)
correctly
Tank vent faulty Fit new tank vent
Leak in fuel hose between pickup
body and carburetor
Seal connections or install new fuel
hose
Saw chain runs while engine is
idling
Engine idle speed too high Readjust with idle speed screw
LA (counterclockwise)
Clutch springs stretched or fatigued Replace the clutch springs or install
new clutch
Clutch spring hooks broken Replace the clutch springs