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Stihl MS 171 Technical Information
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Stihl MS 171 Technical Information

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Technical Information
Chain saws STIHL MS 171, 181, 211 - Series 1139
Contents
1. Technical description
7. Cylinder with piston (MS 211 only)
1.
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.
TI_27_2013_30_01_01.fm
1
3
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
STIH)
27.2013
3
2
englisch / English

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Summary of Contents for Stihl MS 171

  • Page 1: Table Of Contents

    STIH) Technical Information 27.2013 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)

  • Page 2: Handle Frame

    Page 2 Technical Information 27.2013 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.

  • Page 3: Starters

    Technical Information 27.2013 Page 3 Starters Segment The previous segment 1139 084 7800 is being Easy2Start™ starter replaced by the new segment 1139 084 7802. The Easy2Start™ starter is converted from a The new segment 1139 084 7802 has changed version with two pawls (1) to a version with one pawl geometrically and ensures a larger amount of (2).
  • Page 4 Page 4 Technical Information 27.2013 Summary – starters Item Part Name Previous Rem. Fan housing with starter; 1139 080 2102 - - - including Item 5 Fan housing with starter; - - - 1139 080 2102 including Item 6 Fan housing with starter (Easy2Start™); 1139 080 2103 - - - including Items 5, 7...

  • Page 5: Muffler

    The previous mufflers are no longer available as a spare part. Summary – mufflers Item Part Name Previous Rem. Muffler (MS 171) 1139 140 0601 1139 140 0610 1) 2) Muffler (MS 181, 211) 1139 140 0603 1139 140 0608...

  • Page 6: Ignition Module, Wiring Harness, Contact Spring

    Page 6 Technical Information 27.2013 Ignition module, wiring harness, 5.1.2 Wiring harness contact spring The previous wiring harness 1139 440 3000 is being replaced by the new wiring harness 1139 440 3001. Ignition module, wiring harness The new wiring harness 1139 440 3001 differs from the previous wiring harness 1139 440 3000 as 5.1.1 Ignition module...
  • Page 7 Technical Information 27.2013 Page 7 Contact spring Spare parts/service notes The previous contact spring (1) 1139 442 1600 is The new contact spring 1139 442 1601 can be used replaced by the new contact spring (2) for versions with a previous ignition module 1139 442 1601.

  • Page 8: Carburetor, Manifold, Sleeve

    MS 171, 181 Technical description The previous manifold 1139 140 2501 is being The chain saws STIHL MS 171, 181 and 211 will be replaced by the new manifold 1139 140 2502. fitted with a new carburetor as standard. The new manifold 1139 140 2502 is marked by a The new carburetors differ from previous conical groove on the fuel mix duct (see arrow).
  • Page 9 Technical Information 27.2013 Page 9 6.4.2 MS 211 Sleeve To adapt to the modified geometry of the intake The previous sleeve 1139 141 1801 is replaced by ports of the new cylinder (see b 7), the previous the new sleeve 1139 141 1802. manifold 1139 140 2500 is replaced by the new manifold 1139 140 2502.
  • Page 10 Page 10 Technical Information 27.2013 Summary – carburetor, manifold, sleeve 6.6.1 MS 171 Item Part Name Previous Rem. Carburetor C1Q-S238; 1139 120 0615 - - - including Item 3, 7 Carburetor C1Q-S270; - - - 1139 120 0619 including Items 4, 6, 8...
  • Page 11 Technical Information 27.2013 Page 11 6.6.3 MS 211 Item Part Name Previous Rem. Carburetor C1Q-S240; 1139 120 0617 - - - including Items 5, 9, 11 Carburetor C1Q-S268; - - - 1139 120 0612 including Items 6, 8, 10, 12 Carburetor C1Q-S241;...
  • Page 12 Page 12 Technical Information 27.2013 Cylinder with piston (MS 211 only) Service notes – oil seal Repairs on disassembled crankcase All versions of the chain saw MS 211 will be fitted with a new cylinder. For versions of the chain saw MS 211 with new "Cylinder with piston Ø...
  • Page 13 Modification to be introduced : continuously Remarks 1) Previous version of part remains available for machines with the previous cylinder 2) New version of part can also be used for older machines © ANDREAS STIHL AG & Co. KG, 2013 TI_27_2013_30_01_01.fm...

This manual is also suitable for:

1139 seriesMs 211Ms 181