Stihl MS 441 User Manual

15MS 441, MS 441 C
4.6 Carburetor
Condition Cause Remedy
Carburetor floods; engine stalls Inlet needle not sealing –
Impurities in valve seat or cone
Remove and clean inlet needle or
clean carburetor
Inlet control lever sticking on
spindle
Restore easy movement of inlet
control lever
Helical spring not located on nipple
of inlet control lever
Remove inlet control lever and refit
it correctly
Perforated disc on diaphragm is
deformed and presses constantly
against the inlet control lever
Fit a 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 in valve seat Remove, clean and refit inlet
needle
Leak in diaphragm seal Fit a new diaphragm seal
Metering diaphragm damaged or
shrunk
Fit a new metering diaphragm
Impulse hose damaged or kinked Fit a new impulse hose

Stihl MS 441 Specifications

General

Displacement	70.7 cc
Weight	6.6 kg
Fuel Capacity	0.78 L
Chain Oil Capacity	0.36 l
Oil Capacity	0.36 l
Oil tank volume	0.36 l
Chain pitch	3/8"