I own a 17' Chirs Craft Cavalier Fiberglass tri hull. It has been converted to an outboard? Would a 50 hp enigine get me in the water and be able to do some tubing.. Any guesses on speed? I just don't have the money for a bigger engine. I have seen Fiberglass Whaler boats with 50's put on them from the manufacture so I think it might run okay?? Any help thanks