I owned a 14ft crestliner for many years and had no problems. I had a 20" transom and seldom had problems with waves over the transom and that is with my big carcass sitting back there running the tiller! The wider the beam the better and be warry of the seas and you should be fine. Here is a link to the type of boat I had

http://www.crestliner.com/boat_info/boat_model.asp?BID=132
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bawddawg, no biscuit!