14.4.3 Pump Diaphragm - Stihl MS 200 Service Manual

14.4.3 Pump Diaphragm

– Remove the carburetor,
MS 200 b 14.2,
MS 200 T b 14.2.1
: Take out the screw (arrow).
: Carefully remove the end cover
(1).
: Carefully remove the gasket with
pump diaphragm from the end
cover.
MS 200, MS 200 T
1
2
: Carefully separate the pump
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 the pump diaphragm for
signs of damage and wear. Install
a new gasket.
– Check fuel strainer for
1
contamination and damage.
Clean or replace if necessary.
1
: Use a needle to remove the fuel
strainer (1) from the carburetor
body.
– Reassemble in the reverse
sequence.
2 1
2
: Fit the gasket (1) so that the tab
(arrow) is opposite the idle speed
screw and is held in position by
the pegs (2).
2
: Fit the diaphragm (1) so that the
tab (arrow) is opposite the idle
speed screw and is held in
position by the pegs (2).
1
– Position the end cover (1) so that
the idle speed screw (arrow) is at
the same side as the adjusting
screws.
1
2
2
97