If I have an engine running, and I refuel it (while it's running) & it dies... I would suspect there was something wrong with what I added... OR that dumping fuel in while the engine is running stirred up something in the tank and now it's blocking something in the carb...This is only one of the reasons never to do that... (add fuel with engine running)...
You need to start fresh... empty the fuel tank, clean out the carb... don't adjust things ... it was running fine before, nothing changed the carb settings, you may have introduced some water or something else liquid ...
after things are clean see if it will start & run using starting fluid... :smile:KennyV