The MTD 756-0989 Lawn Tractor Engine Double Pulley transfers rotational power from the engine to connected drive components through the belt system. Its double-groove design accommodates two belt paths, helping coordinate power transmission within the equipment. The 5.56-inch diameter identifies the pulley size for part identification. A properly functioning pulley supports consistent... https://www.wholetoolbox.com/mtd-756-0989-lawn-tractor-engine-double-pulley-5-56-dia/756-0989.html