Well, that's a completely different deal.

So, the tank was only down by 5 gallons or so.......and you filled it.........correct?

Take off the line to the primary filter........see if you have flow. Fuel should flow from the tank in a steady stream. If it does.......the tank screen is fine. If it does not, then you definitely have a problem with the screen and you should blow air back through the line to clear the screen as a temporary measure.

If you have fuel and the engine ran the secondary completely out of fuel, the odds of the fuel pump gone bad are getting higher by the minute.......all of the procedures that I stated above.........won't work.........if the fuel pump is NFG.