Tillotson hw 27a pop off

Is there anyway i can pump the pop off pressure. Or do i need a certaint tool?

I’m a little unclear what you are trying to do. When talking pop off, its a measure of how much pressure is needed to open the fuel needle. The tool used to do this applies pressure to the fuel inlet and the pump has a dial gauge to observe the point the needed “pops” and indicates your pop-off. Usually, the amount of pressure is between 8 - 15psi.

This is an example of the gauge: