The rear wheel drive design on the Troy-BiltTB310B XP helps power the mower over rugged terrain. Quickly adjust the variable speed transmission with dual lever controls on the handle. The 163cc Briggs and Stratton engine features ReadyStart technology for simple, no prime, no choke starting. 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 1-1/4 to 3-3/4 in quickly.163 cc Briggs and Stratton ReadyStart engine is designed for simple no prime, no choke startingRear wheel drive with a dual lever, four speed variable speed transmission is designed for traction and control over rugged terrainLarge 2.3 bushel rear bag collects clippings for easy cleanup or compostingAttach a standard garden hose to the deck wash port to quickly clean the deck’s underside and help prevent clippings buildup