I'm having trouble starting my 5420. The issue started out intermittently where it would fire when turned over and the shutdown immediately. Eventually after a couple of tries or after starting it with the throttle raised it would continue to run and act normal. Now it still fires, but won't sustain itself, so I suspect whatever the issue is, something has probably finally failed. If I hold the key a little longer than normal, it runs until I release the key.
It has had the fuel pump installed at some point and the fuel filter was changed about 100 hours ago. At first I thought it was a fuel supply issue, but when I crack the fitting that I've circled in the attachment with the key on (fuel pump running), there seems to be lots of fuel there. Fuel tank is full. Fuel solenoid is clicking, I guess I'm not confident that it is opening, but not sure how to test it.
If I turn the key on and pull out the bleed plug (Item B), some fuel comes out, but not very fast. I also get fuel from fitting A when it is cracked, but likewise not a whole lot.