Fine Tuning a 360 Magnum with a Brawler "Double Pumper"

Newbomb Turk said

There is a check valve under the pump nozzle. They can get stuck but usually they don’t pass any fuel.

That’s about the only other thing I can think of.

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I think it’s the diaphragm I swapped them and it has a squirt now. Still have a slight stumble on quick throttle but that’s probably a pump cam issue now? Not entirely sure.