The STIHL 00009970911 (also listed as 0000 997 0911) is a genuine OEM tension spring used in the clutch assembly of several larger STIHL petrol chainsaws. This small but critical spring helps maintain proper tension in the clutch mechanism so the chain engages and disengages correctly under load. Genuine replacement springs ensure reliable operation and long service life.
Common fitment:
Fits Models (Common Applications)
Commonly found in the clutch / drive area of the following STIHL chainsaw models (and some disc cutters):
- MS 311
- MS 391
- MS 640
- MS 650
- MS 660
- TS 460 (disc cutter)
- 064 / 066 series chainsaws