Stihl MS 661 Manual page 109

Low speed screw
1
: Screw the puller (1)
5910 890 4500 about 5 turns
counterclockwise into the limiter
cap
– left-hand thread.
Do not turn the puller (1) any further
– the low speed screw (L) may
otherwise be damaged.
H
: Use the puller to turn the limiter
cap clockwise until the lug (2) or
screw slot is in line with slot (1).
The dot on the limiter cap must line
up with the mark (arrow).
– Pull out the limiter cap.
– Remove the low speed
screw (L).
108
: 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
L
2
1
: Screw the puller (1)
5910 890 4500 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
H
2
: Check position of limiter cap. If
necessary, use the puller to turn
the limiter cap counterclockwise
until the lug (2) or screw slot is in
line with slot (1).
The dot on the limiter cap must line
up with the mark (arrow).
– Pull out the limiter cap.
– Take out the high speed screw
(H).
1
: Inspect the tip (arrow) and
O-ring (1) for damage or wear
and replace the high speed
screw (H) if necessary.
: Screw down the high speed
screw (H) as far as stop.
– Continue with "Pre-installing
limiter cap".
L
1
1
MS 661, MS 661 C-M