18 hp kohler motor?

I have a lawn tractor that won't start. It has a spark at the plug. It seems like it's not getting any gas. I poured gas in the carb and it ran for a few seconds. Gas runs through the line to the carb. I took the carb off and blew air through where gas goes in and gas blew out the front opening. I put my hand over the front opening and blew air in again and gas blew out the back opening. There is a solenoid that screws out of the bottom of the carb. Could this be the problem?