Stihl MS 171 Technical Information page 12

Page 12
7. Cylinder with piston (MS 211 only)
All versions of the chain saw MS 211 will be fitted
with a new cylinder.
Difference
The new cylinder has a side cover and modified ribs.
Left: previous "Cylinder with piston Ø 40 mm"
1139 020 1202
Right: new "Cylinder with piston Ø 40 mm"
1139 020 1205 with side cover (1) and
modified ribs
7.1 Spare parts
For versions of the chain saw MS 211 with the new
cylinder, in deviation from the versions with the
previous cylinder, the following new spare parts are
required:
– Cylinder with piston Ø 40 mm 1139 020 1205
– Piston Ø 40 mm 1139 030 2007
– Piston ring Ø 40 mm 1139 034 3000
– Carburetor C1Q-S120C – 1139 120 0612
– see b 6
– Carburetor C1Q-S269 – 1139 120 0613
– see b 6
– Sleeve 1139 141 1802 – see b 6
– Manifold 1139 140 2502 – see b 6
– Ignition module 1139 400 1311 – see b 5
– Contact spring 1139 442 1601 – see b 5
– Wiring harness 1139 440 3001 – see b 5
– Segment 1139 084 7802 – see b 3.2
– Oil seal 9639 951 1584 – see b 7.2
7.2 Service notes – oil seal
Repairs on disassembled crankcase
For versions of the chain saw MS 211 with new
"Cylinder with piston Ø 40 mm" 1139 020 1205, the
temperature-resistant oil seal 9639 951 1584 with
rigid housing is required.
For versions of the chain saw MS 211 with previous
"Cylinder with piston Ø 40 mm" 1139 020 1202, the
oil seal 9639 003 1585 with rigid housing continues
to be required.
Repairs on disassembled crankcase
For versions of the chain saw MS 211 with new
1
"Cylinder with piston Ø 40 mm" 1139 020 1205
and for versions with previous "Cylinder with piston
Ø 40 mm" 1139 020 1202, the oil seal
9638 003 1581 with flexible housing is required.
Technical Information 27.2013
TI_27_2013_30_01_01.fm