Walk behind Craftsman push mower will not start after being underwater

My Craftsman 5.5 HP (917.378501) mower with a Honda engine was partially underwater for a few days. I've replaced the oil, gas, spark plug, carburetor, air filter and ignition. It will run for a few seconds when I pour a gas into the carburetor but will not start on its own. Gas is fresh and flows freely into the carburetor. The gas tank was completely dried out before adding the new gas. Any thoughts?

Thanks,
Sam

Walk behind Craftsman push mower will not start after being underwater