Too much prop. Try a 10x6 and see the difference.

Also fatten the mixture up a tad. You're running it way too lean. You don't have to over lean this engine when running a 10x6. I'd like to strangle the person that spread the rumor that these engines run best with an 11x6, or heavier, prop. These engines are designed to scream, not be lugged down like a John Deere garden tractor. If it isn't spinning at 13 to 14k with a 10x6 and spitting a little extra fuel, then it is over propped and too lean.

I'd have to run a few gallons of fuel with that European super lubricant before I could believe that such a low percent, volumetrically, is adequate. I'm beginning to wonder if this low percentage of oil can account for so many Europeans engine problems.

I have nothing against Europeans. After all, that's where my ancestors came from.


Ed Cregger