1.5 turns is the standard setting, so nobody has been messing about with that adjustment previously.

I'm slightly confused at the moment because those Pulsa-Jets normally have a screw-out fitting the mixture screw goes through - see red circle:
[Linked Image]

When you screw out the hexagonal fitting, a large space becomes visible, with the two metering holes at the bottom. Sounds as if you have some kind of Mark II version there. If there is only one hole, and it passes carb cleaner freely, all is well.

You can tell whether you can see daylight between your straight edge and either the carburetor and fuel tank top. With that model Pulsa-Jet, if there is any space there worth mentioning (that is, more than 0.002") the carburetor will flood continuously.

When you have checked the flatness, I think it will be time to reassemble the carburetor in line with the instruction manual.