I don't know what you mean by spray bar.

And I wrote in my first post why I need to adjust it: "but I have had the whole carburetor disassembled, and I need to readjust the spray nozzle".

I talked to the shop where I bought the engine, and I had him measure how far the adjustment skrew was from "flush" on a brand new engine, and it turns out that I need to keep turning the skrew clockwise until I meet some resistance (hitting the rubber gasket inside the carb.). This is about 1.5mm from flush for your reference.

So my problem is solved :-)

Regards,
Futterama