GOOD NEWS!!!!! I had poured a pint of Seafoam into the tank with the 20 gallons of gas I had put in there, and from another can filled up the hose coming from the tank. It looks like the Seafoam did the trick. Went to try to blow some air into the tank, didn't seem to work, so I tried the electric fuel pump again...........and got gas!!!!

Pumped about a gallon out of the tank into a gas can. So I've pumped all the gas from the portable tanks into the on-board tank.

Triple-digit temps today with high humidity, too hot to take the boat out. I'm gonna try it out after work one day this week.