Help I have the old style O S 120 FS that was new in box. I installed it in a Funtana 90, broke it in per instructions engine has no power. Starts great but only turns about 6500 RPM's on the grd. set on the rich side w/ tach. Prop 16-4 wide Fuel 15 % with 20 % syn. oil Plug OS F Valves Adjusted after break in Fuel tank No leaks and center of tank at carb level Fuel line Med
Thanks for any help David Edwards