Transforming a weed wacker engine for a boat ??
old guy,
My LHS sells R/C speed boats about 40-48" long with weedie engines. How big is your PT boat? How big an engine (displacement) do you need? How big of a engine compartment do you have to work with?
I have a couple of weedies that I am not going to pursue as aircraft power plants, perhaps one of them can help out you!