Is your Stihl MS271 or MS291 chainsaw leaking oil or not lubricating properly? This oil pump worm gear and filter kit might be the fix. It’s a replacement for part numbers 1141 640 3203, compatible with MS271, MS291, and similar models. The kit includes a white plastic worm gear and filter, brand new and unused in its packaging. It’s designed for 2-stroke engines and requires some assembly, but it’s a straightforward swap if you’re handy. With a 2-year manufacturer warranty, it’s a budget-friendly alternative to OEM parts. Keep your chainsaw running smoothly by replacing worn-out oiling components with this reliable kit.