The Stihl 11466403206 oil pump is a genuine OEM replacement part designed for Stihl MS 271, MS 291, MS 311, and MS 391 chainsaw models. This essential component ensures consistent and reliable lubrication of the saw chain and guide bar, which is critical for maintaining cutting performance and extending the lifespan of your chainsaw. Made to Stihl's high-quality standards, this oil pump provides precise oil flow, preventing premature wear and overheating during operation. Replace a worn or damaged oil pump with this authentic Stihl part to restore your chainsaw's optimal functionality.