91129 Gravely Lawn Mower - Parts

This is a genuine Ariens part for use with Lawn Mowers and Trimmers. The flat idler pulley applies tension to the blade belt, allowing the belt to turn. The most common reason for replacing the small idler pulley is when it breaks, causing the blades to not cut. This part is sold individually. The tool that you will need to replace the flat idler pulley is a 9/16 inch socket.