driad,

Simple test: Remove the rubber fuel line that connects the inline filter to the steel fuel line at the rubber/steel connection. Get a small can of fuel and put the end of the rubber fuel line into the can and submerged in the fuel.

Pump the primer hand pump. If this primes you fuel system, the problem is somewhere between the end of the steel fuel line and the fuel tank and not the primer pump. This could be a plugged tank strainer, clogged tank vent or an air leak in the steel fuel line.

If this test doesn't prime the system, the hand primer pump is probably NG.

P E H