The Toro 116-4669 Lawn Mower Idler Pulley helps maintain proper belt tension and smooth belt movement during mower operation. This flat idler pulley works within the drive or deck system to guide the belt and reduce slipping as the belt rotates. Replacing a worn or damaged pulley can help reduce belt noise, improve consistent belt movement, and support reliable mower performance. Its ... https://www.wholetoolbox.com/toro-116-4669-lawn-mower-idler-pulley/116-4669.html