Here is a link that I think is very interesting. Very detailed with pictures of re-powers on older Bertram's. I did a search and didn't see anything. Seaboard Marine - Repower Articles | SHOOTER The 4 Year 40 Knot 31 Foot Bertram OdysseyNoelle Mae - 28 Ft Bertram and the Yanmar 4LHA 240 - One Sweet ComboWidgeon - A Very Special 25 FT. Bertram26 ft. SEAWAY - a typical repower?“GOT BAIT”