Adjusting Screws - Stihl MS 261 User Manual

Installing
1
2
3
: Position the lever (2) so that its
hook engages the lever on the
choke shaft (arrows).
: Push the lever (2) onto the
throttle shaft so that it engages
the flats on the end of the
shaft (3).
: Insert and tighten down the
screw (1) firmly.
2
: Check operation
– lever (1) must engage
lever (2) (arrow).
– Reassemble all other parts in the
reverse sequence.
116

12.6.5 Adjusting Screws

3
Grommet has been removed for the
sake of clarity.
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.
1
Always install a new limiter cap.
– Remove the carburetor, b
– See also carburetor
troubleshooting, b 3.6
Low speed screw
: Take out the low speed
screw L (1).
2
1
: Inspect the tip (arrow) 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.
b 12.5
: Screw the puller (1)
1
5910 890 4502 about 5 turns
counterclockwise into the limiter
cap
– left-hand thread.
– Do not turn the puller (1) any
further
– the high speed screw (H) may
otherwise be damaged.
1
MS 261, MS 261 C