[Richard]

A ha ! That green air line is the vent for the tank. It has a loop in it to prevent siphoning. And I can tell you that if you pinch it when reinstalling the tank, that pretty soon the engine will not crank because of the vacuum on the tank. I have data on that situation.

Just a dumb suggestion, because you don’t have very much at risk. If you forced mineral spirits or Seafoam down the line from the tank end is there a possibility it would dissolve the gunk in the check valve?

And while you have the fuel line disconnected at the bung, blow some air into the pickup to make sure it bubbles. I don’t think you have a broken pickup like I did, but it’s a very quick sanity check.

Thank you for helping another Newell owner on this.