Likely some debris has formed during storage and is partially blocking the high speed jet, which is fixed. Before ripping the carb apart, as mentioned, try the spray or another carb cleaner, mixed at about 50% with fresh gas. Let it run, then let it sit for a few days and try again, you might get lucky. If it will pull with the choke on that is almost a sure sign it is starving for fuel, assuming the ignition system is up to par.
I have used this for many years with no fuel related problems:
B-12 ChemtoolŪ Carburetor, Fuel System and Injector Cleaner | Berryman Products