I ran it over the weekend. I was impressed. It porposes at full speed, but it can probably be trimmed out. It's as fast as any other gas airboat I have seen, probably 15-20mph. It turns well. If I chop the throttle, turn, then get back on the throttle, it does really cool slides. I was doing 360's with no sign of flipping, just a little nose dive.
I initially tried it out in my gravel yard. It is probably twice as fast out of the water, but it scratches the hell out of the bottom
Thanks for all the input. Please feel free to ask anymore questions.
1. Brand of motor, difficulty of mounting? Weedeater, carr precision conversion parts, lots of aluminum trimming, details can be found in Engine Conversion forum.
2. Prop size? 16x8, but I think it's a little underpropped. A 16x10 or 18x8 would load the engine better and provide more thrust.
3. Hull width and height? 25.5" overall, 16" at the bottom, 5" deep