Take the bowl off look at a small plunger use your finger push it down a few times if it does not come back up you might try a lubricant until its free again my did the same thing.
Also go over your carb the cap I had one loosen up on me constantly drip a drop about every 4 minutes make sure your not cross threaded and it goes down all the way and check to see your cables fit in the pit all the way down.