Valve Jet; Pump Diaphragm - Stihl MS 171 Manual

14.4.4 Valve Jet

1
– Remove the metering
diaphragm, b 14.4.1
: Use a 5 mm drift (1) to drive out
the valve jet in the direction of the
choke tube.
Take care to position the drift
exactly to ensure that valve jet and
carburetor bore are not damaged.
1
– Check the valve jet (1). If
necessary, clean the carburetor
bore and valve jet or install a new
valve jet, b 16
: Position the valve jet (1) so that
the centering taper (arrow) points
towards the carburetor bore.
MS 171, MS 181, MS 211
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Take care to position the drift
exactly to ensure that valve jet and
carburetor bore are not damaged.
: Fit the valve jet (1) in the
carburetor bore and press it
home until it is flush with the edge
of the carburetor bore.
– Reassemble all other parts in the
reverse sequence.

14.4.5 Pump Diaphragm

– Remove the carburetor, b 14.3
: Remove the screw (arrow).
1
: Carefully remove the end
cover (1).
: Carefully remove the gasket with
pump diaphragm from the end
cover.
1
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