The Troy-Bilt TB310 gas powered mower is designed with a 163cc Troy-Bilt engine that provides durability and makes yardwork easy! The rear-wheel drive helps power the mower over rugged terrain. The self-propelled drive allows for easy push and maneuverability. A large 2.3-bushel rear bag is designed to minimize the time spent emptying the grass clippings. Dual-lever height adjusters are conveniently located near the wheels to adjust the cutting height between 1.25″ – 3.75″ quickly. 21″ STEEL DECK made from heavy gauge steel allows for durability REAR WHEEL DRIVE with a dual-lever, variable speed transmission is designed for traction and control over rugged and hilly terrain POWERFUL ENGINE: 163cc Troy-Bilt engine featuring easy starting, no priming, and long life. MOWING CONVENIENCE: 21 inch, 3-in-1 convertible deck lets you side discharge, mulch or rear bag grass clippings LARGE CAPACITY BAGGING: Rear bag collects 2.3 Bushel grass clippings for easy clean up or composting HEIGHT ADJUSTMENT: Dual-lever, 6 position height adjustment makes it easy to change cutting heights from 1.25-in to 3.75-in high