Re: 14' sea king
Yabbut he said it's a 1984, so it should have a plate. Actually, my 1964 Sea King has a plate...or did. It's now covered by the plywood transom plate, which I made full width inside.
In any case, if it's a plain 14' tinny, 15 hp will do very nicely, and 25 hp is going to be too darned heavy. None of the Sea King tinnies were ever deep and wide boats.