I used a 42 lb thrust Minnkota on my driftboat for years to blow through frog water. This had plenty of power moving downriver. In fact with the rocks in the rivers up here that we can float, I wouldn't want to go any faster. It was adequate, but a few years ago I went to a 4 horse Yamaha gas motor. The thing I like about that is it allows me the option of putting in and motoring up a river to drift back down to the put in/take out. No shuttle needed and gives me another option. The trolling motor would not allow me to do that.