Stihl MS 171 User Guide - Page 83

Throttle Shaft / Throttle Shutter, shutter cannot be closed or opened

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14.4.8 Throttle Shaft / Throttle 3 Shutter 1 2 - Hold the choke shaft in the preloaded position. : Position the choke shutter (1) in the carburetor bore so that the large hole (2) is on the right and the small hole (3) is at the top - the marking (arrow) must be visible below the choke shaft. 533RA344 TG Throttle shaft is stiff or throttle shutter cannot be closed or opened properly: 1 - Remove the carburetor, b 14.3 533RA348 TG - Carburetor troubleshooting, 2 : Turn the throttle shaft a little and pull out the throttle shutter (1). 3 1 533RA346 TG 533RA349 TG 1 2 : Remove the screw (arrow). 1 - Relieve tension of torsion spring (1) and remove the lever (2). - Pull off the torsion spring (1) and lever (3). - Remove the torsion spring (1). : Remove the E-clip (arrow). 533RA345 TG 533RA347 TG - Coat screw with threadlocking adhesive, b 16 : Fit new screw (1) and tighten it moderately. - Close the choke shutter (2) and center it in the carburetor body's bore. - Tighten down the screw firmly. - Check freedom of movement. : Remove the screw (arrow). - Reassemble all other parts in the reverse sequence. 82 MS 171, MS 181, MS 211

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82
MS 171, MS 181, MS 211
–
Hold the choke shaft in the
preloaded position.
:
Position the choke shutter (1) in
the carburetor bore so that the
large hole (2) is on the right and
the small hole (3) is at the top –
the marking (arrow) must be
visible below the choke shaft.
–
Coat screw with threadlocking
adhesive,
b
16
:
Fit new screw (1) and tighten it
moderately.
–
Close the choke shutter (2) and
center it in the carburetor body’s
bore.
–
Tighten down the screw firmly.
–
Check freedom of movement.
–
Reassemble all other parts in the
reverse sequence.
2
533RA344 TG
3
1
2
1
533RA345 TG
14.4.8
Throttle Shaft / Throttle
Shutter
Throttle shaft is stiff or throttle
shutter cannot be closed or opened
properly:
–
Remove the carburetor,
b
14.3
–
Carburetor troubleshooting,
:
Remove the screw (arrow).
–
Relieve tension of torsion spring
(1) and remove the lever (2).
–
Pull off the torsion spring (1) and
lever (3).
:
Remove the screw (arrow).
1
533RA346 TG
3
2
533RA347 TG
:
Turn the throttle shaft a little and
pull out the throttle shutter (1).
–
Remove the torsion spring (1).
:
Remove the E-clip (arrow).
533RA348 TG
1
1
533RA349 TG