The Black Max 21″ Gas Self Propelled Mower is a powerful, lightweight mower that fully assembles in five minutes or less. This mower features a powerful Briggs Stratton 140cc E550 engine. Briggs Stratton engines are built with the highest quality and dependability. The Prime ‘N Pull EZ Starting feature makes starting this lawn mower a breeze.? Just prime the bulb three times and pull. 11″ high rear wheels provide great maneuverability through tough terrain and uneven surfaces. Two point, six position wheel height adjustment allows you adjust cutting height to meet your needs. The high domed solid steel deck provides superior mulching. A quick attach side discharge chute is also included. Assembled Weight 62.8 Pounds, Height 37.5″ Powerful Briggs Stratton 140cc E550 engine. Prime ‘N Pull Starting. Just push the priming bulb three times and pull the cord to start. 5-position height adjustment ensures an even, precise cut every time. Quick Assembly. Assembles out of the box in 5 minutes or less. Assembled Weight 62.8 Pounds, Height 37.5″ Manufacturer Part Number: MNA153029 Model Number: BXSM5503L