Tim, the engine was a 4hp merc, and the boat was around 18. I've got pictures of it somewhere loaded up on moose hunting trips in Thunder Bay, with a weeks worth of gear. Funny thing was it was almost dangerous with nothing in it as it sat so high on the water, but with about 800lbs in it, it settled down into the water and was very stable and the merc would drive it along briskly at about half throttle. It would handle quite a chop head on, but moving around in waves would depend on how far apart they were spaced, as turning it in swells could be lively.