I have only had smaller boats with outboards and would like to get a larger boat.
The ones in my price range have engine issues and here is my question.
I understand the preference for diesel over gas but I have never heard
of anyone simply replacing an inboard with a normal engine such as from a
go-kart or Volkswagon or one of those 3 cylinder japanese cars.
I don't see the advantage of a marine engine since when they get wet they are
filled with rust and seized as would my 6hp go-kart engine.

So, does anyone know why I can't replace an engine with a normal gas engine?

Thanks,
Frank