Fuel pump question....

You don't need to continue cranking to move fuel ! !
The diaphram pump continues to suck/push once the pump is cycled by 2 engine revolutions !
How often have you pulled the fuel line off an engine that hasn't run for a while, and had a shot of fuel spurt out, the pump maintains pressure/suction for quite a while after shutdown, and does so while starting too !

A post from years ago, good thread -

Best Fuel Pump Advice for Newb...