Genuine Stihl OEM oil pump (part number 11276403204 / 1127-640-3204). Factory-engineered to provide reliable lubrication for the chain and bar assembly. Compatible with models including 029, 039, MS290, MS310, MS311, MS390, and MS391—ensuring optimal chain performance and longevity.

✅ OEM Part Number 11276403204 / 1127-640-3204 – Factory-formulated oil pump for accurate compatibility
✅ Wide Model Fitment – Designed to fit popular models: 029, 039, MS290, MS310, MS311, MS390, and MS391
✅ Critical Chain Lubrication – Ensures consistent oil flow to bar and chain for smooth operation and reduced wear
✅ Robust Metal Design – Durable construction built to handle rugged use and high-temperature environments 
✅ Restores Lubrication System – Ideal replacement for damaged or worn pumps to maintain safe and efficient cutting