Most of these small engines "prime" by spraying gas into the mouth of the
carb. If they start and run for a few seconds you have spark and gas.
The "running gas" comes from the bowl. Since you have gas in the bowl, it
looks like the tube that lets the flowing air suck the gas out of the bowl
You have to take the carb apart to the point where you can either blow this
tube clear or run a fine wire through it.