Fuel filter/pump

[macojoe]

When I had my inline 6 I/O all I had for a pump was the one on the motor with a ball to pump up before starting.
That said when you replace the filter fill with fuel when installing, makes for a faster start and the line will prime its self.
If put on empty you will be pumping that ball for a long long time to get it primed, don't ask how I know.
My guess is that they added that elet pump for that reason, but it is not needed.