Small Engines (Lawn Mowers, etc.): Craftman 18.0 Riding mower, hello john, dirty air

Question
I have a 2 year old riding mower that I can't get to turn over.  I replaced the spark plug and the fuel filter.  On the first crank it seems like it wants to start but it won't keep running.  The only thing I get is that first crank it comes to life then stops. I gave it 20 minutes then tried again..nothing.  COuld a dirty air filter be causing it not to turn over?  I put it in storage with gas still in it and I'm worried I have a gummed up carb.

Answer
 Hello John:

 1- Check the Battery for a Dead/Weak Cell. 2- Check the Starter for Dragging. The Actual Running of the Engine is the Carburator Requires Cleaning and Overhauling. Hope this Helps. Let me know what Happens, Please.

 Good Luck

 Respectfully

 John