There is a small (3/16 inch maybe?) brass tube in the air intake coming up to the top at about a 45 degree angle. It is called a bowl vent.
Acquire a squeeze bottle (an empty mustard or ketchup squeeze bottle that has been thoroughly cleaned will suffice), fill the body with fresh fuel, and fill the carburetor bowl through the bowl vent.
Let set for several hours!
One of the "benefits" of our modern fuel is that when allowed to evaporate, it leaves a sticky, gooey film over everything; so as mentioned by 69cuda, the float and float valve may be stuck. GENERALLY, the fresh fuel will disolve most of the crud.
Jon.
