Troy-Bilt, 3-N-1, Self-Propelled Lawn Mower. 140cc Briggs & Stratton engine with Ready Start. 21in Steel Tri-Action Deck. Front Wheel Drive With Variable Speed Transmission. Integrated Deck Wash System. Rear Bag/Side Discharge/Mulch Capable. Chute Included. TriAction cutting system delivers a well-groomed look to your lawn - the rake bumper, specialized blade and symmetrical deck work together to create finely mulched clippings and a clean, even cut every time. 8in Front & Rear Wheels. Dual Lever Height Adjustment & Adjustable Ergonomic Handle. Self-Propelled.