Quote:

Its very easy to screw the needle & seat assembly so far in that the flat in the nut no longer engage it. The nut then turns and nothing else.

Take the screw off, remove the nut and then the gasket. Then put the nut back on with no gasket and unscrew the needle assembly out a turn or two and re assemble it.



This is exactly what happened. The square sides of the needle valve actually chewed into the square sides of the nut, and caused the slip. Can't believe that the brass needle is harder than the nut material. Com'on Holley!

Thanks guys.