SBT sells the motor on a rebuildable core exchange basis. Visit Program Description for further details. *Identifying a 951 DI Sea-Doo Motor This is a Standard remanufactured SBT 951DI engine that fits Sea-Doo. It includes the cases, cylinders, trued and welded Crankshaft, head, air pump assembly and all new internal parts & a woodruff key. Please call SBT for shipping rates