4226 160 2901 STIHL Clutch Drum – Genuine OEM Part4226 160 2901 STIHL Clutch Drum Genuine OEM Part The STIHL Clutch Drum (4226 160 2901) is a genuine OEM replacement clutch component designed for use on select STIHL hedge trimmers. This clutch drum transfers engine power from the centrifugal clutch to the gear housing, enabling smooth and efficient blade operation once the engine reaches operating speed. A properly functioning clutch drum ensures consistent power transmission, reduced vibration, and