I have a 14 ft trihull that I am trying to push around the flats with a 30# minkota transom mount trolling motor.The motor will push the boat but only if I run it wide open and if the wind or tide is moving just a little bit I have no control at all. My question is how big of a trolling motor do I need for my boat. I dont have any pics but its a strait up 14 ft trihull, no topcap or console or anything just a 15 hp outboard on an empty hull.