Take the air cleaner off, start it, take a pair of pliers and smack the carb body few times. Then open the throttle plates while running and cover the carbs intake with your hand or your hand with a rag a few times, don’t let it suck the rag into the carb.

You’re choking it without killing it. See if it idles after this. Sounds like some things inside the carb are gunked up and sticking.