The Masport 21" Self Propelled professional lawnmower features a commercial grade 3-speed transmission and is powered by a commercial Kawasaki FJ 180V engine. This mower is designed for large yards, small acreage and commercial use. The heavy-duty high arch steel chassis is able to withstand sandblasting and hard impacts and is combined with the Quadcut 4 blade cutting system resulting in superior cutting, mulching and catching performance. The heavy-duty cast alloy wheels are extremely tough and are designed to operate under commercial conditions limiting possible downtime.