The SK650's 31.5-hp (23.5-kW) Kubota diesel engine and hydraulic system give it more power for its size than any machine in its class—in a compact package that's easy to tow and maneuver. With 20 net horsepower (15 kW) to the front end, attachments are more productive. You're more productive, too, because the SK650's 8-gallon (30.3-L) fuel tank enables you to work for several hours without refueling.