93
MS 231, MS 231 C, MS 251, MS 251 C
Installing
:
Position the lever (1) so that its
hook engages the lever on the
choke shaft (arrows).
:
Push the lever (1) onto the
throttle shaft (2) so that it
engages the flats on the end of
the shaft.
:
Fit the retaining ring (3).
:
Check operation
– lever (1) must engage
lever (4) (arrows).
– Reassemble all other parts in the
reverse sequence.
2310RA272 TG
3
4
1
2
12.6.5 Adjusting Screws
– Remove the carburetor,
b
12.5
– See also carburetor
troubleshooting,
b
3.6
There are three adjusting screws on
the carburetor:
H
= high speed screw (1)
L
= low speed screw (2)
LA
= idle speed screw (3)
If the carburetor cannot be adjusted
properly, the problem may be the
adjusting screws.
The high speed screw
H
has a
limiter cap, which has to be
removed before the screw is
removed.
Always install a new limiter cap.
Low speed screw
:
Take out the low speed screw
L
(1).
2310RA273 TG
1
3
2
2310RA274 TG
1
:
Inspect the tip (arrow) and
O-ring (1) for damage or wear
and replace the low speed screw
(
L
) if necessary.
– Screw down the low speed screw
(
L
) as far as stop.
– Continue with the high speed
screw
H
.
High speed screw
The high speed screw
H
has a
limiter cap, which has to be
removed before the screw is
removed.
:
Rotate the limiter cap until the
lug (1) is in line with the
slot (arrow).
2310RA275 TG
1
1
2310RA276 TG
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