SBT sells the motor on a core exchange basis. Visit Program Description for further details. This is a Standard SBT remanufactured 903 engine for the 60/90hp motor. It includes the cases, crankshaft, head assembly, all internal parts & a woodruff key. Installation Gasket Kit required. Please call SBT for shipping ratesAt this time the item you are selecting is sold on a cores first basis, please refer to our Program Description on sending the correct components to SBT. The lead time average for turn around is approximately 10-15 business days. Once SBT receives the core, this core has entered the remanufacturing process and cannot be returned.