I have a 20ft jon with etec 90hp. I don't troll with it, I personally think it to hard on a big engine to idle that long. I have a 4hp kicker and an ultra on the front. If trolling in lake will use both at same time, that way I can steer with the electric. I had a 16ft starcraft before this with a merc 4 stroke 60hp. I tried to troll with it, but it would foul up after a bit and I would have to power up for a bit before I could troll again.