Troy-Bilt TB220 159cc 21-inch FWD Self-Propelled Lawn Mower This self-propelled lawn mower is perfect for mowing small to medium sized yards Powered by a 159cc Front Wheel Drive OHV engine Offers a very lightweight design with a 21-inch steel deck Dual-lever height adjustment for user comfort and side mulch capability 7x11-inch wheels offer control while mowing