Mr. Wolf,

I can't confirm what you state about the spraybar rotation with complete confidence, but I did confirm that rotating the spraybar towards the rear did not make it leaner. I was under the impression during my testing that it made no difference which way it was turned. It did seem to get richer, like you said when rotated to the rear. I never turned it the other way to see if it made any difference. You very well may be right. I just didn't confirm it in my testing. Also, I have no reason to doubt you. Just because something is stated in a manual, doesn't mean it is gospel. Look at the recommended prop sizes for this engine. They were definitely wrong about that. I honestly don't know why this particular engine seems to be a black sheep, but to them, it certainly is. It just needs more extensive testing on their part to find out what it really needs to run right. Then it should be fixed, and the manual updated to support their findings. If they did that, this whole thread probably wouldn't exist.