Stihl MS 650 Manual page 84

: Screw puller 5910 890 4500
about 5 turns counterclockwise
into the limiter cap.
H
1 2
: Line up the limiter cap on the high
speed screw (H) so that its slot is
in line with the slot in the
carburetor body – limiter cap's
lug must be visible through the
slot in the carburetor body.
: Marks on limiter cap and
segment are in alignment
(arrow).
Note:
The lug is in line with the slot.
On older machines, the limiter cap's
lug is at 90° to the slot. Align the lug
relative to the slot by eye.
MS 650, MS 660
– Pull off the limiter cap.
Note:
Limiter caps that have been
removed once are damaged and
must not be re-used.
After removing the limiter caps it is
necessary to carry out the basic
setting first.
– Screw down both adjusting
screws until they are against their
seats.
– Open the high speed screw (H)
(1) one full turn.
– Open the low speed screw (L) (2)
one full turn.
The basic setting of the carburetor
is easier with the setting disk
5910 893 6600 fitted on the
screwdriver.
Adjusting idle speed (with
tachometer)
– Check the air filter and clean or
replace as necessary.
– Check the spark arresting screen
and clean or replace as
necessary.
– Check chain tension.
– Warm up the engine.
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