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Bertram 28 inboard to outboard conversion

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Bertram 28 inboard to outboard conversion

Old 06-14-2019, 10:17 AM
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Default Bertram 28 inboard to outboard conversion

Hello I have a 1976 28 Bertram with a pair of 351ís. Iím just getting fed up with keeping them running, finding (reliable) mechanics to come work on them and all the original engine wiring. I know part of the problem probably is me not being able to run it every weekend. Itís been sitting over a year because of all the problems I put new heads, and rebuilt the carbs and raw water pumps twice on both motors just in past year even though the boat has been sitting on the lift for over a year. Every time I get one running half decent something else happens. Wondering if anyone has had experience in converting a 28 or similar hull to outboards I know there is a lot involved if anyone has any insider tips or advice I would greatly appreciate it. Thanks
Old 06-14-2019, 10:23 AM
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While probably not exactly what you're picturing, there is a wealth of knowledge in this thread.
Old 06-14-2019, 10:33 AM
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Thereís quite a bit to it, but the people who have rave about the performance. Youíll need to significantly rework the transom to strengthen it and tie it into the stringers to bear the load of the outboards. It seems like some people leave the fuel tank but Iíd consider moving fuel into the old motor space to try to reduce the COG change.

But it as I recall, even going to old f225s yielded 50+mph, so itís a remarkable hull performance wise considering the size.
Old 06-14-2019, 12:44 PM
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It will plane off and run 35+mph with a single 300hp OB.

Old 06-14-2019, 02:32 PM
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As nice as the outboard conversions are, What is your budget? It won't be cheap.
Old 06-14-2019, 04:29 PM
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I am on my third 28. First was inboard with 351s. Second I have 2 f250 Yamahas. Third is the one I am stretching in the thread above. They are awesome with outboards. Not a huge engineering problem but lots of work. Happy to help answer anything I can.

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