[T2] [VB] diagnosing bad fuel pump?

[John Kolak]

2-7 lbs is a bit out of range. More like 3 or 4. More than that will
overwhelm the needle valve and flood the carb. Of course, as you said, high
float setting will do the same, as will a hardened rubber tip on the needle
valve. Pressure test is good, but on mechanical pumps, they tend to either
work or not. If you have the type than can be opened up, look for a cracked
diaphragm. Incorrect rod length can also cause insufficient volume.
Otherwise I'd be more likely to look for problems like clogged fuel filter
or fuel tank outlet.

John