P.S. Be careful with that 15 HP engine. It's about twice the power you need for anything but head on steaming into a gale. If you run it full throttle in calm conditions, keep an eye on the stern, and when the stern becomes submerged to the point your backstay chainplate is in the water, back off on the power. I suppose it's self limiting to the extent that the outboard powerhead will become submerged and the engine will aspirate water before you sink the boat.