I have a 1985 Bayliner, 17' Bowrider with 85hp O/B, I really need to get a trolling motor, but have no idea what to look for. What size and/or pound of thrust should I be looking for for this boat? I was just skimming through "FleaBay" & there are ton's of them in all different sizes/LBS. of thrust. What would be my best bet? Please keep in mind, I'm on a really tight budget. Thanks Guy's/Gals for any advice. MAXX