Stihl 1139 · Section G · 7 of 13 · 16 parts
Quick chain tensioner
Fits MS 171, MS 171 C.
Parts (16)
| Pos | Part number | Description | Qty |
|---|---|---|---|
| 1 | 1139 640 1701 | Chain sprocket cover | 1 |
| 2 | 1139 648 3800 NLA | Cover plate | 1 |
| 3 | 1123 648 2200 NLA | Adjusting wheel | 1 |
| 4 | 9076 478 2996 | Pan head self-tapping screw P4x12 | 1 |
| 5 | 1121 660 1000 | Wing nut | 1 |
| 6 | not sold separately | Torsion spring not available as a separate item | 1 |
| 7 | not sold separately | Cap not available as a separate item | 1 |
| 8 | not sold separately | Handle not available as a separate item | 1 |
| 9 | not sold separately | Cylindrical pin 3m6x26 not available as a separate item | 2 |
| 10 | 1123 660 3001 NLA | Tensioning gear | 1 |
| 11 | 9041 319 0600 NLA | Pan head screw M4x5 | 1 |
| 12 | 1123 021 2800 | Insert | 1 |
| 13 | 1123 664 0501 | Bumper spike | 1 |
| 14 | 9075 478 4115 | Pan head self-tapping screw IS-D5x16 | 2 |
| 15 | 0812 370 1000 | Screwdriver T27x120x70 option | 1 |
| Not numbered on the diagram — assemblies, kits and options | |||
| — | 1139 007 1000 | Quick tensioner parts option | 1 |
2012 service parts catalogue. Parts are not interchangeable across engine series — check yours before ordering. NLA = withdrawn by STIHL before 2012.
Wrong number or missing part for the MS 171, MS 171 C? Report a correction →