ORIGINAL: w8ye
To screw the bypass out will reduce pressure.
I wouldn't attemp to measure actual pressure.
The usual procedure is to get the pump just strong enough to be able to run the engine very rich if you screw the needle out a ways.
Then try to adjust the idle needle.
Then look at you mid range. If the mid range is rich, you have too much pressure.
Readjust pressure as noted in instructions and start adjustments all over again.
"....to run the engine very rich if you screw the needle out a ways... the high speed needle, or the low?
BILL: My normal routine is the test stand. I just knew this one would be as easy to run as the first, so it went into the plane instead.
I can see that adjusting the pump will require the test stand.
Thanks guys!