Is a used but as close to new as you’ll get volvo penta sx-rt1 complete diesel sterndrive or outdrive 1.85:1 ratio that was a tech demo instructional aid so never installed on a boat or used other than training, part number 3868396 / 3868585, “this unit will need to be re-sealed & checked over before installation as has sat around and has light surface rust on u joint assembly as was in covered outdoor storage”