Is my regulator working correctly?

I used oil to help get some Push-Loc fittings on the fuel lines. Wanting to flush the lines with gas before connecting to the carbs, I powered up the pump and I just get a dribble out of the hose. Sorry, didn't measure volumes. Even backing the adjustment screw all the way out doesn't make much difference.
Disconnected the regulator and the pump shoots a high volume of gas (looks easily over 100 gallons/hour).

How much gas should get to the carbs?

Thanks
Roy

I think I flushed the oil out so I hooked up to the two Edelbrocks. The pressure was steady at 9 and screwing in on the regulator raised it to 12. I couldn't get it any lower than 9.
Is that too much?
The regulator has another "out" port that I could use as a return line.
Any input?
Thanks,
Roy

quick search says you should have max 6psi fuel pressure min 4 psi at wot.

What size is your return line? perhaps it is the restriction?

See if you let it dump to a bucket if you can get under 9 with it wide open.

what kind of regulator