12.6.3 Pump Diaphragm - Stihl MS 201 Manual

12.6.3 Pump Diaphragm

– Troubleshooting, b 3.6
– Remove the carburetor,
MS 201 b 12.4,
MS 201 T b 12.5
1
2
: Take out the screw (1).
: Remove the end cover (2).
: Carefully remove the pump
diaphragm with gasket.
1
2
: Carefully separate the pump
diaphragm (1) and gasket (2)
MS 201, MS 201 C, MS 201 T, MS 201 TC
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
contamination and damage.
Clean or replace if necessary.
1
: Use a needle to remove the fuel
strainer (1) from the carburetor
body. Clean or replace the fuel
strainer.
– Reassemble in the reverse
sequence.
Installing
2 1
2
: Fit the new gasket (1) so that the
contours (arrows) match and it is
held in position by the pegs (2).
2
2
: Fit the pump diaphragm (1) on
the gasket so that the contours
(arrows) match and it is held in
position by the pegs (2).
1
: Fit the end cover (1) from below
so that the pump diaphragm and
gasket are still held in position.
: Position the end cover (1) so that
the contour (arrow) points in the
direction of the throttle and choke
shaft levers.
1
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