Technical Information · issue 2 of 2011
Cylinder; Summary
IssueTI 2/2011
Engine family 1139
Full text
Page 1 of 2
STIH)
Technical Information 02.2011
Chain saw STIHL MS 181 – Series 1139
Contents
1. Cylinder
2. Summary
1. Cylinder
The versions of the STIHL MS 181 chain saw with
the following serial numbers are being equipped
with a new cylinder:
– 2 85 053 104 to 2 85 053 831
– 2 85 161 244 to 2 85 161 339
– 2 85 160 449 to 2 85 160 588
– 2 85 161 340 to 2 85 161 409 1
– starting with 2 86 410 505 534TI000 KN
1.1 Identification
It is possible to distinguish between the previous Left: previous cylinder
cylinder and the new cylinder according to the fins
Right: new cylinder with side cover (1) and
on the top and on the side.
modified fin pattern
TI_02_2011_30_01_01.fm englisch / English
)m~ge 2 Technical Information 02.2011
1.2 Spare parts 1.2.1 Cylinder with piston
For versions with the new cylinder, in deviation from The new cylinder with piston 1139 020 1203 for the
the versions with the previous cylinder, the following version with the new cylinder contains the new
spare parts are required: piston 1139 030 2005. The other individual parts
correspond to those of the versions with the
– Cylinder with piston 1139 020 1203
previous cylinder.
– see b 1.2.1
– Piston Ø 38 mm 1139 030 2005 1.3 Specifications
– Manifold 1139 140 2501 The specifications for machines with the new
– Carburetor C1Q-S191A 1139 120 0608 cylinder correspond to the values for machines with
the previous cylinder.
– Carburetor C1Q-S192A 1139 120 0609
(Versions with fuel pump)
– Filter base 1139 120 3400
(from MS 211)
– Muffler 1139 140 0603
(from MS 211)
2. Summary
Item Part Name Previous New Rem.
1 Cylinder with piston, 1139 020 1201 1139 020 1203 1)
including Item 2
2 Cylinder Ø 38 mm 1139 030 2002 1139 030 2005 1)
3 Manifold 1139 140 2500 1139 140 2501 1)
4 Carburetor C1Q-S121B 1139 120 0605 --- 1)
5 Carburetor C1Q-S191A --- 1139 120 0608
6 Carburetor C1Q-S122B 1139 120 0606 --- 1)
7 Carburetor C1Q-S192A --- 1139 120 0609
8 Filter base 1139 120 3401 1139 120 3400 1)
9 Muffler 1139 140 0601 1139 140 0603 1)
Modification to be introduced see b 1
Remarks
1) Previous version of part remains available for machines with the previous cylinder.
© ANDREAS STIHL AG & Co. KG, 2011 Technical Documentation
D1/MTK-ro
TI_02_2011_30_01_01.fm Page 2 of 2
Extracted from the manufacturer's 2012 service catalogue. Most of these PDFs embed fonts with a shifted character map, so the text above was recovered rather than copied — read it as a faithful but imperfect transcription, and treat the page image above each block as the authority where the two disagree — the figures exist only there, because they are vector drawings that text extraction cannot keep.