Stihl MS 192 T Manual page 14

4.6 Carburetor
Problem
Carburetor floods; engine stalls
Poor acceleration
MS 192 T
Cause
Inlet needle not sealing.
Foreign matter in valve seat or
cone
Inlet control lever sticking on
spindle
Helical spring not located on nipple
of inlet control lever
Perforated disc on diaphragm is
deformed and presses constantly
against the inlet control lever
Idle jet too lean
Main jet too lean
Inlet control lever too low (relative
to correct installed position)
Inlet needle sticking to valve seat
Diaphragm gasket leaking
Metering diaphragm damaged or
shrunk
Impulse hose damaged or kinked
Remedy
Remove and clean inlet needle or
clean carburetor
Restore easy movement of inlet
control lever
Remove the inlet control lever and
refit it correctly
Fit a new metering diaphragm
Turn low speed screw L
anticlockwise (richer), until engine
accelerates smoothly
Turn high speed screw H
anticlockwise (richer), no further
than stop
Set inlet control lever flush with top
edge of housing
Remove inlet needle, clean and
refit
Replace diaphragm gasket
Fit new metering diaphragm
Fit new impulse hose
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