92
MS 231, MS 231 C, MS 251, MS 251 C
– Carefully remove the pump
diaphragm with gasket from the
end cover.
:
Carefully separate the pump
diaphragm (1) and gasket (2)
– always install a new gasket.
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.
:
Use a needle to remove the fuel
strainer (1) from the carburetor
body. Clean or replace the fuel
strainer.
– Reassemble in the reverse
sequence.
2310RA266 TG
1
2
2310RA267 TG
1
Installing
:
Place the gasket (1) and pump
diaphragm (2) on the end
cover (3) so that the
contours (arrows) are in
alignment and make sure they
are held in position by the
pegs (4).
– Fit the end cover (1) from below
so that the pump diaphragm and
gasket are still held in position.
:
Align the end cover (1) so that the
contour (arrow) points in the
direction of the throttle and choke
shaft levers.
2310RA268 TG
4
2
4
1
3
2310RA269 TG
1
– Move the end cover (1) back and
forth until its pegs engage the
holes in the carburetor body.
– Check that the pump diaphragm
and gasket are properly seated.
:
Insert and tighten down the
screw (2) firmly.
– Reassemble all other parts in the
reverse sequence.
12.6.4 Lever on Throttle Shaft
– Remove the carburetor,
b
12.5
– Carburetor troubleshooting,
b
3.6
:
Remove the retaining ring (1).
:
Pull off the lever (2).
2310RA270 TG
1
2
2310RA271 TG
2
1
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