Stihl MS 171 Technical Information

Page 2 Technical Information 27.2013
TI_27_2013_30_01_01.fm
Spare parts/service notes
The previous handle frames 1139 791 4900 and
1139 791 4901 are no longer available as spare
parts.
The new handle frames 1139 791 4903 and
1139 791 4904 can be used for machines with the
previous handle frames.
With the new handle frames, the retainer (1)
1139 790 8100 is no longer required.
The retainer 1139 790 8100 remains available as a
spare part for machines with the previous handle
frames.
2.1 Summary – handle frames
Item Part Name Previous New Rem.
1 Handle frame (Standard) 1139 791 4900 1139 791 4903 1) 3)
2 Handle frame (Easy2Start™) 1139 791 4901 1139 791 4904 1) 3)
3 Retainer 1139 790 8100 - - - 2)
Modification to be introduced : continuously
Remarks
1) Previous version of part no longer available from factory
2) Previous version of part remains available for older models
3) New version of part can also be used for older machines

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