Thanks Geistware, I got the seafoam yesterday but have not tryed it yet. I will have to squirt it in the carb because I couldnt find the spray type. I have a mejzlik 19x8 prop to try when the weather lets me. If my tack is right it should turn in the low 7000s. I plan on staying with the 20x6 prop during treatment of the seafoam to see if I can pick up any R.P.M.s Thanks again Wayne M.