Howdy,
Rather sounds like a fuel problem. First try to start by normal procedure, then pull the spark plug and inspect. If dry, you have confirmed a fuel problem. This is bypassing a lot of proper diagnostic procedure, but might do the job in your case.
If the plug is dry, you have a plugged fuel system and rather profoundly. Next step would be to check the fuel pickup filter, and then the little filter screen inside your carburetor. Can you suck fuel through the fuel line as disconnected from the carb? If so the problem is the screen inside the carburetor. Please note that these checks are the quick and dirty poor man's diagnostic. Depending on the results, however, we can tell where to go next.
Did you store the machine with fuel in the system?
Regards,
Walt Galer