STIHL Worm Gear 1133 640 7100 | Oil Pump Drive Gear | Fits 028, MS270, MS271, MS280 & MS291 Chainsaws

The Genuine STIHL Worm Gear (Part No. 1133 640 7100) is an OEM oil pump drive gear designed to transfer drive from the clutch assembly to the automatic chain oil pump on selected STIHL chainsaws. This small but essential component ensures a consistent supply of bar and chain oil, helping to reduce friction, minimise wear, and maximise the service life of your guide bar and saw chain.

Fits the Following STIHL Models

• 028 Series: 028, 028 AV
• MS Series: MS 270, MS 270 C, MS 271, MS 271 C, MS 280, MS 280 C, MS 291, MS 291 C