I have your boat (14 foot Valco) so I'm talking from experience. I have an 15hp and an 36 pound electric thrust on her. (I prefer to only use the electric) So this is the $64,000 dollar question. What lakes are you primarily interested in fishing??? It makes a difference on how much power you can get away with!! In a more windy lake, you can't get away with less power. For example, if you were primarily fishing a small lake like Corona lake, you could get away with next to nothing. But fishing a Big lake that is known for wind, you would need at least a 9.9hp for safety.