Stihl MS 171 Technical Information

STIH)
Technical Information
TI_27_2013_30_01_01.fm
englisch / English
Chain saws STIHL MS 171, 181, 211 – Series 1139
Contents
1. Technical description
2. Handle frame
3. Starters
4. Muffler
5. Ignition module, wiring harness, contact spring
6. Carburetor, manifold, sleeve
7. Cylinder with piston (MS 211 only)
1. Technical description
To improve function, new components are
introduced for the chain saws MS 171, 181 and 211.
2. Handle frame
Handle frame for standard versions
The previous handle frame 1139 791 4900 is being
replaced by the new handle frame 1139 791 4903.
Handle frame for Easy2Start™ versions
The previous handle frame 1139 791 4901 is being
replaced by the new handle frame 1139 791 4904.
Both new handle frames differ from the previous
handle frames by a stub (2) that is in the opening on
the engine housing. The new handle frames and
stub (2) reduce the load on the AV spring (3), which
is why the retainer (1) 1139 790 8100 is no longer
installed on the new handle frames.
Left: previous handle frames:
Handle frame (Standard) 1139 791 4900
Handle frame (Easy2Start™)
1139 791 4901
Right: new handle frames:
Handle frame (Standard) 1139 791 4903
Handle frame (Easy2Start™)
1139 791 4904
3 3
2
533TI025 KN
1
27.2013

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