Best Fuel Pump Advice for Newb...
I went ahead and pulled the fitting off the inlet. The fitting itself was wide open, clean as a whistle. Somebody mentioned some kind of strainer / filter on the inlet side of the carb. I got some pictures of that as well. Clean as a whistle. See the pictures at the bottom.
So I went ahead and pulled the pump off. I haven't torn into it, but it seemed kind of "catchy" when pumping the arm. It wasn't smooth at all. It did spurt some fuel out.
This is my thinking: The carb is new. The inlet is clear. The filter is new and clear. The tank is new. The sender is new (the sock is still clean and pretty). The fuel flowed like a geyser from the fuel tank, through the fuel line all the way to the fuel pump when I pushed air from that line into the tank. The only thing I'm not certain about, is the fuel pump itself.
I'm going to keep it simple, and purchase one of the mechanical ones mentioned here. And also follow the short start (let the fuel flow) starting procedure described above, when I estimate the fuel bowl is low to empty.