Yoto tell us how you know for sure the pump isn't pushing enough fuel? If it is pushing any fuel, after a minute or less of cranking it should at least pop and crackle.. Have you poured a bit of fuel into the open carb to see if it runs thataway?
You do know that it pumps squirts out and not a full stream of fuel..but the squirts are plenty to keep her running at full speed. There should be about 6 pounds of pressure.
Big JIm

professional bovine relocation specialist