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

Okay so I’m gonna ask here because google doesn’t seem to be very helpful lol it’s just flooding me with the wrong topics.

When the diaphragm is broken it would leak fuel externally of the carb correct?

If so, and I don’t have a leak, what else could be causing the weak shot? I feel like if it was clogged it wouldn’t be able to depress the diaphragm right?

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.