80
MS 192 T
If actuation of the throttle shaft is
stiff and/or the throttle shutter
cannot be opened or closed
properly:
– Remove the carburetor,
– Troubleshooting on the
carburetor,
– 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).
217RA200 TG
– Turn the throttle shaft slightly.
:
Pull out the throttle shutter (1).
1
217RA201 TG
:
Remove the circlip (arrow) with a
suitable tool.
217RA202 TG
– Before pulling out the throttle
shaft, secure the pump piston to
prevent it popping out,
:
Unhook and relax the torsion
spring (arrow).
217RA203 TG
1
:
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).
217RA204 TG
:
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,
217RA205 TG
1
2
:
Push the throttle shaft (2) with
prestressed torsion spring into
the carburetor body.
14.3.6 Throttle Shaft / Throttle
Shutter