The BRIGGS & STRATTON 5022373YP Lawn Mower Pulley transfers power through the belt-driven system for smooth and reliable mower operation. Designed as a replacement pulley, it fits compatible Briggs & Stratton lawn mowers and outdoor power equipment to guide the drive belt and maintain proper belt alignment and tension. It works by rotating with the belt system to transmit power effici... https://www.wholetoolbox.com/briggs-stratton-5022373yp-lawn-mower-pulley