I'll give the 3 hose vacuum diagram on the FAQ page a shot and see what happens.

I hate carburetors... That manual is 46 pages of pure evil to me.

It does not give concise adjustment procedures. It is full of if this and on 'modified' that, and some use this while others use that and don't forget that if this is adjusted that way, make sure this is turned the opposite way, but NEVER on a Tuesday.

AAAGGGRHHHH!

Can't they just say turn the screw X until it is tight and then back it off X turns?