Stihl MS 461 - Adjusting Screws

82 MS 461, MS 461-R
Installing
: Fit the new gasket (1) so that it
contours match the end cover (2)
and its holes engage the
pegs (3).
: Fit the pump diaphragm (1) on
the gasket so that their tabs
(arrow) are in alignment and its
holes engage the pegs (2).
Gasket and pump diaphragm are
now held in position.
3443RA312 TG
3
3
1
2
3443RA313 TG
1
2
2
: Fit the end cover (1) from below
so that the pump diaphragm and
gasket remain in position.
: Align the end cover (1) so that the
tabs (arrow) are facing away from
the choke lever.
: 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.
3443RA314 TG
1
3443RA315 TG
2
1
12.5.4 Adjusting Screws
Illustration shows limiter caps.
Positions of adjusting screws are
the same on version without limiter
caps.
There are three adjusting screws on
the carburetor:
– Adjusting screws (1) and (2) with
limiter caps
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 and low
speed screw L have limiter caps,
which have to be removed before
the screws are removed.
Always install new limiter caps.
– Remove the carburetor, b 12.4
– See also carburetor
troubleshooting, b 3.6
H
3443RA316 TG
1
3
L
2
LA