Had something similar happen to me, ran out of gas, switched to reserve on the fly and got nothing. Had to push it in half a mile to the gas station. (man is the East coast different from Kansas, no one stopped to help and there was big HILLS). Even after filling she wouldn't start. Finally gave up and called for help and as soon as I hung up the phone she starts right up. Ends up the Petcock tube thingamabob is cracked and it was just taking time to get the fuel through, probably have some crud built up as she sat for a few months. Gotta get a bigger fuel tank

I went to the woods because I wished to live deliberately...and not, when I came to die, discover I had not lived..