Inlet Needle - Stihl MS 440 Service Manual

The diaphragm material and the
inlet and exhaust valves are
subjected to continuous alternating
stresses and ultimately show signs
of fatigue. The diaphragm distorts
and swells and has to be replaced.
: Place the gasket on the
carburetor body.
The gasket and metering
diaphragm are located by the
integrally moulded pins (arrows).
2
: Fit the metering diaphragm so
that the perforated plate (1) faces
the inlet control lever (2).
– Fit the end cover.
MS 440, MS 440 C
– Insert the screws and tighten
them down firmly.
Reassemble all other parts in the
reverse sequence.
1

12.3.2 Inlet Needle

– Remove the metering diaphragm
– b 12.3.1
: Take out the screw (arrow).
– Remove the inlet control lever
with spindle.
There is a small spring under the
inlet control lever which may pop
out during disassembly.
– Take out the inlet needle.
: If there is an annular indentation
on the sealing cone of the inlet
needle, a new inlet needle must
be fitted because a tight seal is
no longer assured.
69