Genuine STIHL 11436402002 Chain Sprocket – .325″ 7-Tooth Spur Sprocket

The STIHL 11436402002 (also referenced as 1143 640 2002) is a genuine OEM chain sprocket — the small drive gear mounted on the clutch drum that engages the chain and transfers power from the engine through the clutch to the chain and guide bar.

This sprocket plays a crucial role in chain rotation and smooth cutting performance. Over time, the teeth on the sprocket can wear or round off, which may lead to chain skipping, irregular cutting, poor chain feed and accelerated bar/chain wear. Replacing the sprocket as part of routine maintenance restores correct chain drive and efficient cutting.

Fits Models (Common Applications)

This drive sprocket fits a range of mid-sized STIHL petrol chainsaws, including:

• STIHL MS231 / MS231 C
• STIHL MS241 C
• STIHL MS251 / MS251 C