Most have a vacuum operated petcock. That means no fuel will flow until the engine's cranking. Because the bowls were run dry, it will need to crank on the starter to create a vacuum, which opens the petcock, which will then
start to allow the carb bowls to refill. Meaning keep cranking. It will take a good thirty seconds or so. Maybe you've already figured this out by now.
Keeping the "Hap" in "Happy Holidays"!
Regime change begins at home.
Blind patriotism is worse than no patriotism.