If I was consistently fishing three plus me I would have a 115 on my Thor 17x66. But that's a lot of dudes for a 17 foot boat. The problem with the bigger motors is when you're fishing just yourself, or you and one other, a lot of times the stern will sit deep in the water, which affects how the boat tracks while side drifting, backtrolling etc. And it also affects what you can drift over.