The Toro 140-5847 Lawn Mower Idler Pulley helps maintain proper belt tension and smooth power transfer for reliable mower operation. Designed as a replacement idler pulley, it guides the drive belt while applying the necessary tension to help keep the belt properly engaged with the pulley system. Proper pulley function helps reduce belt slipping, maintain consistent blade or drive per... https://www.wholetoolbox.com/toro-140-5847-lawn-mower-idler-pulley/140-5847.html