I picked up a ultralight airboat at a auction last weekend. It was built by Alaska airboats in the valley. It is powered with a 582 rotax. It runs about 40 mph with 2 guys in it.
I am surprised how well it goes with a 55hp motor. I have a new 65hp blue head rotax I think I will put in it.
I am thinking it should be a good hunting rig. It is burning 2-3 gal. A hr.