Engine Manufacturer: Kohler Horse Power: 21 hp Engine Type: KT620 Displacement: 660 cc (40.3 cu. in.) Transmission: Dual Independent Hydro-Gear ZT-2200 Integrated Transaxles Wheel Size: 18 x 8.50-10 (Pneumatic 4-Ply; Low Profile) Fuel Capacity: 3 gal. (11.36 L) Deck Size: Side Discharge: 42 to 48 in. (107 to 122 cm); Mulch: 42 to 48 in. (107 to 122 cm)