Stihl MS 181 User Manual

69MS 171, MS 181, MS 211
– Coat profile on oil suction
connector with oil, b 16
: Press home the oil suction hose
(1) until the tab is completely
flush with the guide (arrow) in the
engine housing
– oil suction hose is now secure.
– Check position of pickup body. If
necessary, use hook
5910 893 8800 to position it
properly.
The flange of the oil suction hose
must locate flush against the engine
housing.
– Reassemble all other parts in the
reverse sequence.
– Tightening torques, b 3.5
13.3 Removing and Installing
the Oil Pump
The oil pump is press-fitted in the
underside of the engine housing.
A malfunction may be caused by the
worm or the pump itself.
The worm is removed and installed
at the clutch side, b 8.3
– Remove the handle frame,
b 11.4
533RA279 TG
1
: Pry the oil suction hose (1) out of
the oil pump (arrow).
: Screw the puller (1) 1130 into the
oil pump as far as stop.
: Place the installing tool (1)
1123 890 2202 in position and
push the pin into the bore (arrow).
533RA265 TG
1
533RA281 TG
1
533RA282 TG
1
: Place the lever of the installing
tool (1) in the puller and secure it
with the pin (arrow).
: Swing the lever upwards to pull
the oil pump out of the engine
housing.
– Unscrew the oil pump from the
puller. Inspect it and replace if
necessary.
: Line up the oil pump (1) as shown
by the symbol (arrow) – the
countersunk bore must line up
with the cross bore in the oil
pump’s seat.
533RA283 TG
1
533RA284 TG
533RA285 TG
1
All manuals and user guides at all-guides.com

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