Stihl MS 461 Manual

13MS 461, MS 461-R
3.6 Carburetor
Condition Cause Remedy
Carburetor floods; engine stalls Inlet needle not sealing
– foreign matter in valve seat or
cone
Remove and clean the inlet needle,
clean the carburetor
Inlet needle worn Fit new inlet needle
Inlet control lever sticking on
spindle
Check the inlet control lever and
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
Metered diaphragm deformed Fit new metering diaphragm
Poor acceleration Setting of low speed screw too lean Check basic carburetor setting,
correct if necessary
Setting of high speed 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
damaged
Fit a new metering diaphragm and
gasket
Tank vent faulty Fit new tank vent
Leak in fuel hose between pickup
body and carburetor
Seal connections or install new fuel
hose

Stihl MS 461 Specifications

General

Motor type	2-stroke motor
Chain gauge	1.6 mm
Chain pitch	3/8 \
Automatic oiling	Yes
Oil tank capacity	0.325 L
Fuel tank capacity	0.8 L
Engine displacement	76.5 cm³
Engine power	6 hp
Power source	Gasoline

Weight and Dimensions

Weight	6700 g