Fuel pump direction should not matter. Are you sure about the fuel line INSIDE the tank?? If you replaced that one too, try unhooking that line and blowing back into the tank. Hear bubbles, ok. Check your fuel pump again. It's not hard to get one of the plates turned around and it will not pump. Check all of the gaskets too. Is there one turned wrong? If everything from the pump to the tank is good, pull the carbs and check the float valves, as said before, they might be stuck.
Quote originally posted by beanerboy
would it matter if i mounted the fuel pump up side down so the fuel in was on the bottom next to the crank inlet?
This makes me wonder though...why is the pump now upside down??