Lawn Mower Wont Run

[Lawn Rider]

I have a Craftsman 12 hp lawn Rider that will run when i put gas into the air intake but not on it own. Even though i have changed the oil, spark plug, fuel filter, air filter, and cleaned fuel lines fuel tank and carbureter. Any ideas on what could be wrong.

 

[ILENGINE]

Either the main jet, emulsion tube is still clogged, or the fuel shutoff solenoid isn't working.