I have a 15 foot wooden drift boat that I built myself. I deliberately made it to be as lightweight as possible because of local conditions here in MN.

By the standard of my boat, a Clackacraft is very heavy so while a 3 HP we put on my boat was plenty, I'd say 5-7 HP should be fine. I think a 10 HP would be excessive and you'd get tired of carrying all the extra weight around.

One think I really find handy about the small 3 or 4 hp models is you can find them with internal fuel tanks so you don't have to lug around a remote fuel tank as well. This is reallly nice because for just short blasts of use, they hold plenty of fuel and it's one less piece of gear to be tripping over in the boat.

Grouse