I have a 2016 Tohatsu forty on my 1656 Saltmarsh and we love it. Their 20-50 hp four strokes are their bread and butter. You see a good many down in FLA on microskiffs. They are light weight for a fourstroke, and sip fuel, so you can make those long runs and not worry about fuel. I've got less than 100 hours on mine, but I know a few guys in Fla that have 750+ hours on their and they've never been in the shop except for routine maintenance.
As for the boat. I've duck hunted out of a 15' and it is built like a tank. Hope this helps.
Ankona Cayenne Kevlar, Suzuki 60