Thread: Trolling Motor size question

I have an ’85 Monark 16’ Bass Type boat that I am rebuilding. It has an Evinrude Foot Controlled Trolling Motor on it and the manual says it is “15 lbs of static thrust”. I got it running and just listening to it I compared it to the sound of my 50# Minn Kota transom mount and it seems somewhat puny. I would like a newer TM. Here is the quandary: There a few used 40# TMs around but I wonder if they are big enough for my boat. I had the 50# on the back of my 16’ jon and it was not too big, so I am curious if I should bite the bullet and buy a 55# motor, which are harder to find and of course, a lot more expensive.