The MTD 75604280 Idler Pulley is a genuine OEM replacement part designed for a wide range of MTD-manufactured outdoor power equipment, including lawn mowers, lawn tractors, and zero-turn mowers from brands like MTD, Cub Cadet, Troy-Bilt, Yard Machines, Huskee, Bolens, and Craftsman. This durable plastic idler pulley features an outer diameter of 114.3 mm (4.5 inches), a bore diameter of 9.525 mm (3/8 inch), and a width of 25.4 mm (1 inch). It plays a crucial role in maintaining proper belt tension and routing for efficient power transmission in your equipment's drive system. Replacing a worn or damaged idler pulley ensures optimal performance and extends the life of your belts.