A flat idler pulley plays a crucial role in the proper functioning of your lawn mower's belt system. It provides tension and guidance to the belt, ensuring smooth power transfer between the engine and cutting blades. Over time, these pulleys can wear out due to constant use and exposure to outdoor elements. When a flat idler pulley fails or becomes damaged, it can lead to belt slippage, reduced cutting performance, and even belt breakage. That's where our replacement flat idler pulleys come in. Browse our large selection of flat idler pulleys below.