Inlet Needle - Stihl FS 94 Instruction Manual

2 1
: Carefully separate the metering
diaphragm (1) and gasket (2).
The diaphragm material is
subjected to continuous alternating
stresses and eventually shows
signs of fatigue, i.e. the diaphragm
distorts and swells and has to be
replaced.
: Check metering diaphragm (1)
and gasket (2) for signs of wear
or damage, replace if necessary.
Installing
1
: Position the complete flange (1)
with fuel hoses attached against
the underside of the carburetor
body so that its peg (2) and the
projecting valve jet (3) engage
the recesses.
– Check that the pump diaphragm
and gasket are properly seated.
– Hold the flange steady and turn it
over with the carburetor.
72
2
1
: Note installed positions of
gasket (1) and metering
diaphragm (2).
: Fit the gasket (1) and metering
diaphragm (2) so that the holes
line up with the pegs (arrows) and
the holes in the carburetor.
2
2
: Hold the complete flange (1) and
fit the end cover (2) so that it
3
engages the pegs (arrows).
1
1
1
– Check that metering and pump
diaphragms with gaskets are
properly seated, re-position if
necessary.
: Fit the screws (1) and tighten
them down firmly in a crosswise
pattern.
– Reassemble all other parts in the
reverse sequence.

10.4.2 Inlet Needle

1
– Remove the metering
diaphragm,
b 10.4.1
– Check gaskets of metering and
pump diaphragms and replace if
necessary, b 10.4.1, b 10.4.3
: Take out the screw (1)
Series 4149 Powerhead
1
1