The Snapper 7022106YP Lawn Mower Engine Pulley transfers engine power to the belt-driven system for smooth and efficient mower operation. Designed as a replacement engine pulley, it fits compatible Snapper lawn mowers to connect the engine output shaft with the drive or cutting system. It works by rotating with the engine shaft and guiding the belt to transmit power to connected components during operation. This supports reliable power transfer, proper belt alignment, reduced component wear, and dependable mowing performance.