Inoperable Compact utility tractor, 21 hp 3 cylinder diesel Mechanic's Special, Here's Your Next Project ! This Kubota B7510 Compact Utility Tractor is selling INOPERABLE, but features a 21 HP 3-cylinder diesel engine and the dependable Kubota platform that has made these tractors popular for years. Whether you're looking for a repair project, parts machine or restoration opportunity, this could be the buy you've been waiting for!