If your boat has decks and floors, then I would not go with the 28lb thrust. I had a 33lb thrust on my 14' jon with large front and rear decks, floors throughout excluding the bilge area, 2 batts, 3gal tank, and 25hp OB. TM pulled fine on calm and light winded days, but it struggled in moderate winds. With mod winds, I have to run on 4 power setting into the wind. Boat would barely craw forward on 3 setting, and would lose ground on 2 setting. I've recently upgraded to a 40lb thrust TM, but have yet to test it.