The Stihl 11236403201 is a genuine OEM oil pump designed for a range of Stihl chainsaws, including the MS 210, MS 230, MS 250, 021, 023, and 025 models. This critical component ensures consistent and efficient lubrication of the saw chain and guide bar, which is essential for smooth operation, reduced friction, and extended lifespan of the cutting attachment. Replacing a worn or damaged oil pump with this authentic Stihl part restores proper lubrication, maintaining peak performance and reliability for your chainsaw.