Fixed Jet; Pump Diaphragm - Stihl MS 460 Service Manual

12.3.3 Fixed Jet

1
– Remove the metering
diaphragm, b 12.3.1
: Use a suitable screwdriver to
unscrew the fixed jet (1).
Take care not to damage the fixed
jet with the screwdriver.
Install in the reverse sequence.
70

12.3.4 Pump Diaphragm

: Take out the screw (arrow).
– Remove the end cover.
1 2
: Remove the gasket (1) and pump
diaphragm (2) from the end cover
or carburetor body.
: Carefully separate the diaphragm
and gasket.
– Inspect diaphragm for damage
and wear, fit a new gasket.
The diaphragm material as well as
the inlet and outlet valves are
subjected to continuous alternating
stresses and eventually show signs
of fatigue, i.e. the diaphragm
distorts and swells and has to be
replaced.
1
: Check fuel strainer (1) for
contamination and damage. If
necessary, use a needle to take it
out of the carburetor and clean or
replace.
: Place the gasket (1) on the end
cover (2).
: Wet the pump diaphragm (3) with
fuel and place it on the gasket.
MS 460, MS 460 C
3
1
2