DESCRIPTION Built to last, KOHLER® 6600 Series engines start quickly and reliably with Smart-Choke™ technology. They deliver a consistent cut even in tough mowing conditions. Features a 3 year, unlimited hour, limited warranty. FEATURES Designed with lower vibration for a more comfortable ride (compared to the 7000 Series engine) Starts hot or cold, even at temperatures below freezing, with Smart-Choke™ technology No need to choke the engine - starts at any throttle position Cleaner cuts - Consistent-Cut™ technology maintains engine speed even in tough mowing conditions Based on Kohler commercial Command PRO® engine design SPECIFICATIONS Engine type: Four-cycle, single-cylinder, air-cooled, vertical shaft, gasoline, OHV, with cast iron liner. Model: KT620 HP: 21 HP (15.66 kW) Displacement: 40.3 cu. in. (660 cc) Bore: 3.3 in. (83 mm) Stroke: 2.4 in. (61 mm) Compression Ratio: 9.1:1 Dry Weight: 82 lb. (37.2 kg) Oil Capacity: 2 US qt. (1.9 L) Lubrication: Full pressure w/full-flow filter Dimensions LxWxH: 18.6 x 16.7 x 13.4 in. Certified Power: 20.41 HP (15.22 kW) Certified RPM: 3600 Emissions Compliance: EU Stage V; CARB Phase III; China Phase II; EPA Phase III Engine Type: Consumer EQUIPMENT TYPES Residential Riding Mower ENGINE Engine Type Four-cycle, single-cylinder, air-cooled, vertical shaft, gasoline, OHV, with cast iron liner. Bore x Stroke 3.3 x 2.4 in. Displacement 40.3 cc Compression Ratio 9.1:1 Horsepower 21 HP DIMENSIONS Length 18.6 in. Width 16.7 in. Height 13.4 in. Weight 82 lb.