You need to adjust the float on the over flowing carb seems to me it's to high your idle issue carb is not a jet issue per say because it would still hold idle it maybe a fuel air mixture problem 2 full turns out from all the way in is a good start then try it out if not back it out a little more about 1/4 turn if ur not idling your secondary jet could be clogged "my issue that I had " it's possible you may need to pull it do a very thorough cleaning with carb cleaner and a pic to clean any crud out a deep clean will help eliminate any problems I have a spare stock carb if u need any parts from it to get urs going