Throttle Shaft; Throttle Shutter - Stihl MS 441 Manual

14.4.7 Throttle shaft /

throttle shutter

If the throttle shaft moves stiffly or
the throttle shutter does not open or
close properly:
– Remove carburetor, b 14.3.
– Carburetor troubleshooting chart,
b 4.6.
– Remove throttle shaft and clean
the shaft and shaft guides with
a little commercially available
solvent-based degreasant not
containing any chlorinated or
halogenated hydrocarbons.
: Take out screw (arrow).
1
– Turn throttle shaft slightly.
: Pull out throttle shutter (1).
MS 441, MS 441 C
2
1
: Take out screw (arrow).
– Disconnect lever (1) and throttle
cable retainer (2).
: Remove lock washer (arrow).
: Pull throttle shaft (1) out towards
adjusting screws, detaching and
relaxing the leg spring (arrow) at
the same time.
– Clean throttle shaft and guides.
– Examine throttle shaft (1) and leg
spring (2), replace if necessary.
– Note installed position (arrow) of
leg spring.
1
2
– Turn leg spring (1) roughly half
a turn clockwise to tension it.
– Drive ball of accelerator pump
into bore in carburetor with
a suitable tool, b 14.4.8.
: Slide throttle shaft (2) with
tensioned leg spring into
carburetor housing from the side
with the adjusting screws.
1
1 2
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