The CRAFTSMAN 37420 push lawn mower is powered by a Briggs & Stratton® Silver Series 140cc OHV engine with 5.50 ft.-lbs of torque for dependable starting performance and durability. It features a MRS spark plug provides easier starting. The 21-in. 3-in-1 deck offers side discharge, mulching or bagging for convenience. The 4-point deck height adjusters with 5 positions allow for quick height adjustments and the Precision Plus cutting system delivers high-performance in both bagging and mulching applications.