Prop is 16/6 Classic. I am going to have to get a tach. I am a technical person and should do these checks correctly. I did set the needles as they should be. I will order the carb. But first, I have to take my Craftsman WE apart as it has a 25cc -looks like Weadeater engine- crankcase cover looks exactly like the one I have on my Stinger, now. It might provide an extra boost of power. I am using the stock mufflers for now.