1920 not enough fuel

Blow out the fuel line with air from the pump back to the gas pick-up after first removing the lines from those items. Does air flow easily? If yes, then try next step. Does a lot of junk get blown out? If so, then you may need to replace the line. If OK, then try blowing air into the tank thru the sender ( take off the gas cap first). Does air flow OK? If so, reconnect all lines and try running the engine again.