I have just purchased a 19 ft. glassply, actually a 17ft with an extended transom similar to the whaler mount system used by boston whaler in the mid 80s.The boat is completely open with a center console. Is anyone familiar with this hull? The boat came with a 70 h.p. yamaha and i would like to upgrade to at least a 90 perhaps a 115. The boat is rated for a 120 max. Would a 115 be too much for this hull?