Stihl MS 181 User Manual

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
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Stihl MS 181 Specifications

General

Idle speed	- RPM
Motor type	2-stroke motor
Chain pitch	3/8 \
Blade length	400 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	3.5 m/s²
Sound pressure level	100 dB

Weight and Dimensions

Weight	43004300 g