Using “Prop Selector,” a 12x6 three blade should load an engine about the same as a 12x8 two blade.

If you’re wanting to change because you need additional ground clearance, an 11x7 three blade would load the engine slightly less than your current prop; and an 11x8 would load it slightly more.

Sometimes I think prop selection is voodoo or something. You buy every size imaginable. You try a bunch, and only like a few. Then you go back to the one you originally started with.