I just purchased a 1958 Tomahawk Ski Mate. The boat is in great condition, very sound. I need to purchase a motor, and the spec say that the transom height is 15" and the Max. O.B.C. H.P. is 65 H.P. Max O.B.C Load is 1025#. I found a 1974 Johnson 65 H.P. with controls and a long shaft...