The genuine STIHL 41386403200 oil pump is an essential OEM replacement part designed for various STIHL trimmers, brushcutters, and backpack brushcutters. This original equipment manufacturer (OEM) oil pump ensures proper lubrication and reliable operation for models including FS 120, FS 120 R, FS 200, FS 200 R, FS 250, FS 250 R, FS 300, FS 350, BT 120 C, FR 350, FR 450, FR 480, and FR 480 C. Maintaining the correct oil flow is crucial for engine longevity and performance.