I just bought a 10 foot flat bottom Columbia Boat and need to pick out a motor for it. It is only rated for up to a 10hp. I will be using it soon for trolling for salmon in tidewater here in Oregon. I was hoping someone could give me some advice as to what size of motor would go well on it. I am looking at several motors in the 3-9.8 hp range. The motor will need to be stong enough to push the boat against the tide with 2 people and gear in it. Thanks in advance for any help you can give.