Stihl GS 461

12 GS 461
3.6 Carburetor
Problem Cause Remedy
Carburetor floods; engine stalls Inlet needle not sealing
– Foreign matter in valve seat or
cone
Remove and clean inlet needle or
clean carburetor
Inlet needle worn Replace inlet needle
Inlet control lever sticking on
spindle
Check inlet control lever, replace if
necessary
Helical spring not located on nipple
of inlet control lever
Remove the inlet control lever and
refit it correctly
Perforated disc on diaphragm is
deformed and presses constantly
against the inlet control lever
Fit new metering diaphragm
Metering diaphragm is deformed Fit new metering diaphragm
Poor acceleration Low speed adjusting screw "too
lean"
Check basic carburetor setting,
correct if necessary
High speed adjusting screw "too
lean"
Check basic carburetor setting,
correct if necessary
Inlet needle sticking to valve seat Remove inlet needle, clean and
refit
Metering diaphragm or gasket is
damaged
Replace metering diaphragm and
gasket
Tank vent faulty Replace tank vent
Leak in fuel line between pickup
body and carburetor
Seal connections or replace fuel
line