Stihl MS 171 Manual

81MS 171, MS 181, MS 211
– Turn the choke shaft until the
choke shutter is closed.
: Remove the screw (arrow).
– Turn the choke shaft a little and
take out the shutter (1).
: Remove the E-clip (arrow).
– Pull out the choke shaft (1) in the
direction of the lever. Disconnect
and relax the torsion spring at the
same time.
533RA337 TG
1
533RA338 TG533RA339 TG
1
– Check the choke shaft (1) and
torsion spring (2) and replace if
necessary.
: Note installed position (arrow) of
torsion spring (2).
– Clean the choke shaft and
guides, b 16
– Install in the reverse sequence.
The throttle shaft is shown without
the lever for reasons of clarity.
: Push the choke shaft (1) into the
carburetor.
: Position the torsion spring (2) on
the throttle shaft (arrow).
533RA340 TG
2
1
2
1
533RA341 TG
: Fit the E-clip (arrow) and let go of
the choke shaft.
: Turn the choke shaft (1) counter-
clockwise until its flat side faces
forwards – choke shaft is now
preloaded.
533RA342 TG
1
1
533RA343 TG
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Stihl MS 171 Specifications

General

Idle speed	- RPM
Motor type	2-stroke motor
Chain pitch	3/8 \
Blade length	350 mm
Product color	Black, Grey, Orange
Chain tensioner	Yes
Motor speed (max)	10000 RPM
Fuel tank capacity	0.266 L
Engine displacement	31.8 cm³
Power source	Gasoline
Sound power level	112 dB
Vibration emission	4.5 m/s²
Sound pressure level	99 dB