With respect to a gasoline inboard v. outboard, you will have gasoline in your boat either way. With the inboard, you will likely have a fixed tank and piping. With the outboard, you will probably have a portable tank with hoses.
As between the two options, a properly managed gasoline inboard engine seems preferable.
Last edited by Goodnewsboy; 11-19-2006 at 07:26 PM.