Throttle Shaft / Throttle Shutter - Stihl MS 192 T Manual

14.3.6 Throttle Shaft / Throttle
Shutter
If actuation of the throttle shaft is
stiff and/or the throttle shutter
cannot be opened or closed
properly:
– Remove the carburetor, b 14.2
– Troubleshooting on the
carburetor, b 4.6
– Remove the throttle shaft, then
clean the shaft and shaft guides
with a little standard solvent-
based degreasant not containing
any chlorinated or halogenated
hydrocarbons.
: Remove the screw (arrow).
1
– Turn the throttle shaft slightly.
: Pull out the throttle shutter (1).
80
: Remove the circlip (arrow) with a
suitable tool.
1
– Before pulling out the throttle
shaft, secure the pump piston to
prevent it popping out,
b 14.3.7
: Unhook and relax the torsion
spring (arrow).
: Pull the throttle shaft (1) with
torsion spring out of the
carburetor body.
– Clean the throttle shaft and
guides.
– Examine the throttle shaft for
signs of damage and replace it if
necessary.
– Examine the torsion spring and
replace it if necessary.
: Install the torsion spring.
Ensure that the torsion spring is
fitted correctly (arrow).
2
: Turn the torsion spring (1)
roughly a half-turn in clockwise
direction with a suitable tool to
prestress it.
– Push the pump piston into the
bore of the carburetor with a
suitable tool, b 14.3.7
: Push the throttle shaft (2) with
prestressed torsion spring into
the carburetor body.
1
MS 192 T