When I rebuilt our Puma the system was completely drained. The fuel priming device did not work in this situation. I removed the device, leaving the line open to drain into a container and primed the system by putting slight pressure into the tank via the tank breather line. It took no time at all to remove all the air from the system - quite easy once you know how.


It is important to have an open line and not to over presurise the tank though


Erich