28Cf Parts

Hex jam nut (9/16-18 UNF) that secures threaded shafts and fasteners in laundry equipment, resisting loosening from vibration to help maintain alignment and reliable operation of assemblies that rely on tight, secure connections. What it does:

• Locks onto a 9/16-18 UNF threaded shaft or stud to prevent fastener rotation and axial movement
• Helps keep pulleys, collars, shafts or linkages from working loose during normal use and vibration
• Reduces wobble, noise or misalignment caused by loose threaded connections
• Used as a thin (jam) nut where space is limited or as a secondary lock nut

• Disconnect power and move the appliance to a safe, stable work area before servicing.
• Use the correct 9/16" wrench or socket; hold the mating fastener steady while tightening the jam nut.
• Do not overtighten; follow OEM service manual torque guidance if available and inspect threads for damage before reuse.

The flywheel key is the component on outdoor equipment that keeps the flywheel connected to the crankshaft. Over time, this key may become damaged or broken, particularly if the engine experiences a forceful stop, like hitting a large stationary object. If the flywheel key breaks, the engine will not start. A slightly damaged flywheel key is noticeable through symptoms like misfiring, backfiring, or having no power. If any of these are occurring, the flywheel key should be replaced to prevent complete engine failure.A flywheel puller tool is required for this repair. Make sure the engine is cool before working on the flywheel. Wear safety gear, including gloves and eye protection. Disconnect the spark plug and remove the blower housing. Remove the flywheel mounting nut and set it aside. Take the recoil starter cup off the mower. Use the flywheel puller to remove the flywheel and access the flywheel key. Remove the broken flywheel and replace it with the new flywheel. Reverse the steps to put the mower back together.This flywheel key is made of an aluminum alloy and is sold as an individual part. It is designed for use in lawnmowers, lawn tractors, and other small engines manufactured by Briggs and Stratton, Toro, Lawn-Boy, Simplicity, MTD, and others.