Official Troybilt rear-engine riding mower parts

Common repair parts for Troy-Bilt rear-engine riding mowers

• Blades. Replacement cutting blades for riding mowers are available in different shapes and sizes. Replace mower blades when they're worn or damaged.
• Air filter. The air filter prevents abrasive particles from entering the engine's cylinders, which could cause mechanical wear and oil contamination.
• Spark plug. The spark plug is the device responsible for delivering electric current from an ignition system to the combustion chamber of a spark-ignition engine. This current ignites the compressed fuel/air mixture by means of an electric spark, while containing combustion pressure within the engine.
• Seat switch. The seat switch recognizes whether you are sitting on the seat. If the seat switch doesn't detect you in the seat when you release the brake, the switch kills the engine. To prevent tampering, the seat switch also kills the engine when you release the brake if you unplug the seat switch wire harness.
• Drive belts. The ground drive belt connects the engine crankshaft to the transaxle pulley to drive the rear wheels. The blade belt attaches to the engine pulley and spins the cutting blades.

What to do when the mower deck vibrates on your Troy-Bilt rear-engine riding mower

If the mower vibrates when you engage the cutting blades, there might be a problem with the blade drive system. Deck vibration can be caused by an unbalanced blade, worn pulley or mandrel, bad blade belt or debris caught inside a pulley. Loose nuts or bolts on the pulleys, mandrels or blades can also cause vibration. Remove the mower deck and re-tighten all fasteners. Check for wear on pulleys, mandrels and blades. Replace any worn or damaged components.