Depending on the model you have. Locate the carburetor (behind the air filter) on the bottom of the carburetor bowl there should be 2-10mm bolts, one of which will have a phillips head slot for screwdriver. If you say you drained the old gas out of the tank,make sure the gas valve is turned off.. then remove the bolt with the phillips head on it. When you remove the bolt, be sure to hold a cup, or whatever under the bolt, as you are draining the old yukkie gelled up gas thats been in the bowl. If you dont shut the gas valve off, and pull that bolt it will drain the entire tank. Also i tell everyone if any machine is going to sit for a period of 30 days or more, to drain the carburetor bowl and the tank to prevent any issues and stay away from gas stabilizer (on anything older than like 1994 stabil i suppose is ok but i still wouldnt). Put the bolt back into the carburetor bowl..turn gas valve back on and im willing yo bet it will run as it should..if it doesnt, remove the bolt that doesnt have the phillips slot, remove the bowl, and clean it w wire brush or sandpaper, put back together..if still no go..buy the same carb and replace entire thing. But truely think in ur case u will be in good shape with 1st thing i said to do. If any issues get back on here hope this helps. Good luck

My guess is a tiny piece of junk got stuck in the carburetor. Check the simple stuff first; it does have enough gas, you do have the gas on/off valve switched to ON, and you do have the choke open to start it.
Then watch this free video. I hope this helps!

https://www.youtube.com/watch?v=bA7K6TCM9Eg