The Kubota D722 is a 0.7 L (719 cc, 43.9 cu·in) straight-three, water-cooled naturally aspirated diesel engine manufactured by Kubota. It has a spherical type combustion chamber with glow plug, Bosch MD mini fuel injection pump, and Bosch throttle type injection nozzle. The compression ratio rating is 23.0:1 or 23.5:1.