83MS 171, MS 181, MS 211
: Pull out the throttle shaft (1) in the
direction of the adjusting screws.
Disconnect and relax the torsion
spring (2) at the same time.
– Plug the bore (arrow) to prevent
the pump piston popping out.
– Clean the throttle shaft and
guides, b 16
– Check the throttle shaft (1) and
torsion spring (2) and replace if
necessary.
– Note installed position (arrow) of
torsion spring.
The screw (3) must not be loosened
– it guarantees the factory-set
position of the lever.
2
533RA350 TG
1
2
533RA351 TG
1
3
– Remove the pump piston (1),
spring (2) and strainer (3). Check
the parts and replace if
necessary.
: Fit the strainer (3) in the bore first.
Then fit the spring (2) and pump
piston (1) in the bore (arrow).
: Push the throttle shaft (1) with
torsion spring into the carburetor
body from the side with the
adjusting screws.
: Use a suitable tool to press the
accelerator pump piston into the
bore (arrow) and then push the
throttle shaft all the way through.
533RA228 TG
1 2 3
533RA352 TG
1
533RA354 TG
: Position torsion spring on
carburetor body’s shoulder
(arrow).
: Fit the E-clip (1).
: Turn the throttle shaft (1) counter-
clockwise until its flat side is
visible.
– Hold the throttle shaft in the
preloaded position.
: Place the throttle shutter (1),
notch (arrow) first and the hole
(2) on the left, on the flat side of
the shaft – the marking must be
visible.
533RA353 TG
533RA355 TG
1
533RA357 TG
2
1
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