The air/fuel mix is supposed to be done with the engine running. You will need one of these before you can accomplish it properly. They hide the a/f screw in that well where it is unreachable with a straight screwdriver and it results in all these guesses and searching for the "right setting" formula. There isn't one.
https://www.harborfreight.com/hand-t...set-93916.html
The screwdriver set has a flex shaft that goes around and up into the well where the screw lives.
Start the engine, adjust the fuel screw until you have the fastest possible idle. If you move the screw in or out it will slow or bog.
When you get the fastest possible idle you set the idle speed using the idle screw on the side of the carb. It should be set at 1500rpm.
After you set the idle properly if you are still bogging you need to shim the needle, then readjust the a/f screw.