The Kubota GB13 is a sub-compact utility tractor produced from 1997 to 2001 as part of the GB Series. It features a Kubota D662 0.7L 3-cylinder liquid-cooled diesel engine producing 12.9 hp (9.6 kW). The tractor has a 6-speed gear transmission with 6 forward and 2 reverse gears, manual steering, mechanical wet disc brakes, and four-wheel drive. It includes a two-post ROPS for operator safety. The GB13 has a wheelbase of 50 inches (127 cm), weighs 1157 lbs (524 kg), and uses standard agricultural tires sized 4.00-12 front and 7-16 rear. The rear PTO operates at 540/1000 rpm with a 1.375 inch shaft. Electrical system is 12 volts with electric ground. It is succeeded by models GB130 and GB14.