Yes, water is unlikely but maybe debris or something got in.
Before getting started on it after work, I started it up and it ran for a few seconds before blowing fuel out the vent stack.
Anyway, the situation went from bad to worse. The fitting broke off the bottom of the tank and flooded the cab floor, garage floor and me.
I managed to catch about 10 gallons. Five gallons went everywhere else.
So, the tank has to come out and the carburetor has to be opened up.
Good times.