CRAFTSMAN® M220 21-in Self-propelled Gas Push Lawn Mower has a 150cc Briggs and Stratton® engine. The self-propelled single speed mower with front wheel drive makes getting the job done easy. The 3-in-1 deck allows you to side discharge, mulch, or rear bag grass clippings. The dual-lever, 6 position height adjustment makes it easy for you to change the cutting height while mowing.