I'll be all don moving in another couple of weeks, then I can get back to my conversion.

I have prices the props at about $10 each. That means that I can't afford to get more than 2 probably. SSSOOOOO...... I gotta have a pretty good idea of what size prop I'll need.

It's a STHIL 25.4 CC gonna be mounted on a air-boat or swamp buggy whatever you want to call it. It has a stock walbro carb, for now, but a free flow muffler. rtr wieght target is about 12 lbs. (considered light for most airboats this size)

I know that the pitch has to be lower than airplanes, because the boat never really overcomes more than 1/2 of the total drag. I know that with the .46 engines many use a 11x4 or 11x5.

CAn this engine swing a 16 inch prop fine? Should I go with the 15inch?