I'd take the breather off the carb, then stuff a rolled up sheet of paper down in there, then pump the crap out of the throttle.
After about 5 or 6 pumps, you outta have a wet piece of paper. If not, you ain't getting gas, and your problem is likely a clogged fuel line or filter, or a barfed fuel pump.
If you have a wet piece of paper, then you're getting fuel.. take the paper out in the driveway and toss a match on it. The paper outta instantly be consumed in flames. If not, well.. your gas is probably bad.
If I had to absolutely guess, i'd say you probably have a clog. Your "tour de lawn" probably knocked some crud in the tank free, and you got a floater stuck in the line, fuel pump, or filter.
In ANY vehicle that has sat more than a year, I always reccomend pulling the gas tank, and at the very least, flushing it out.
What I do is remove the tank, dump out the old gas, then put a gallon of fresh gas in it and shake it up good, then dump out the fresh gas.
Some dudes put loose nuts and bolts in the tank at this phase along with the gas. The loose nuts and bolts rattling around in there help bust loose any stuck on debris or rust flakes. Just remember to count what you put in, and make sure you get the same number back out!
Then I let it sit for a day or so with a pair of panty hose over the fill spout (to let vapor out, but keep critters, sand, and other stuff out)
After it's had a chance to air out, I have a look down the spout with a flashlight, to try and get an idea of what it looks like rust wise.
From there, you can go to further cleaning with commercial tank cleaning solution, and/or sealing.
