A third theory is that something got jarred loose and you have a clog downstream of the pump, or even in the carb itself. Same test as #1 but if symptoms persist, look for trouble between pump and carb. You could also fill the bowl of carb and look to make sure you get a squirt when pulling the throttle lever up.
Before you go chase any of these rabbits, might be best to make sure you have spark. It’s easy to assume a fuel problem and get tunnel vision. It’s also easy to forget something silly like turning on the ignition. I “know a guy” who has done things like that.
