Stihl 1143 · Section E · 5 of 14 · 20 parts
Chain tensioner, Chain sprocket cover
Fits MS 231, MS 231 C, MS 251, MS 251 C.
Parts (20)
| Pos | Part number | Description | Qty |
|---|---|---|---|
| 1 | not sold separately | Spur gear not available as a separate item | 1 |
| 2 | not sold separately | Adjusting screw not available as a separate item | 1 |
| 3 | 1123 640 1900 | Tensioner slide | 1 |
| 4 | 1123 664 1400 | Thrust pad | 1 |
| 5 | 1123 664 2200 | Cover | 1 |
| 6 | 9074 477 2995 | Pan head self-tapping screw IS-P4x12 | 1 |
| 7 | 1143 640 1701 | Chain sprocket cover | 1 |
| 8 | 0000 955 0801 | Hexagon nut M8 | 2 |
| 9 | 1143 664 0500 | Bumper spike | 1 |
| 10 | 9074 477 4130 | Pan head self-tapping screw IS-P5x16 | 2 |
| 11 | 1123 021 2800 | Insert option | 1 |
| 12 | 1123 660 3001 NLA | Tensioning gear | 1 |
| 13 | 9041 319 0600 NLA | Pan head screw M4x5 | 1 |
| 14 | 1143 640 1731 | Chain sprocket cover | 1 |
| 15 | 9076 478 2996 | Pan head self-tapping screw P4x12 | 1 |
| 16 | 1139 648 3800 NLA | Cover plate | 1 |
| 17 | 1123 648 2202 NLA | Adjusting wheel | 1 |
| 18 | 1121 660 1000 | Wing nut | 1 |
| Not numbered on the diagram — assemblies, kits and options | |||
| — | 1123 007 1004 | Spur gear / chain adjusting screw kit | 1 |
| — | 1143 007 1005 | 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 NLA = withdrawn by STIHL before 2012.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 231, MS 231 C, MS 251, MS 251 C? Report a correction →