I cut away a piece of the "tube" with my Dremel tool and cutting wheel. I paralleled the contour of the cover. The flow is definitely improved. I'm impressed.
I've had not starting problems since performing the mod. My noise problem went away when I epoxied the shaft into the hole in the pump.
I was contemplating replacing the 6025 pumps with 6045s, but now I don't see the need.
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