I was afraid of that. I certainly didn't mean to remove the plug or move anything in the crossbar, but it fell out and I did my best to put it back the way it was.

I did find the original patent, in the case anyone needs a good diagram:

https://www.google.com/patents/US26...8cVdjnG4KrgwTP5YKQBA&ved=0CB0Q6AEwAA

There is a slight updated patent for newer models as well:

https://www.google.com/patents/US28...GjAcVdKJN4afNtm3grAP&ved=0CB4Q6AEwAA

And a decent bulletin describing in less legalistic terms how the carb operates (but the diagrams aren't as good as the patent):

http://newagemetal.com/pages/ServiceProcedures/B/1964/64ModelBmanual.pdf

It appears that the tube is simply in place, but that the small needle like flat pin that sticks in the inlet side is not described in the patents or the bulletin. I'm hoping that resetting it will fix the problem. I'll keep you all posted with an update. I'd hate to get another carb or switch to TBI.

Last edited by Grover; 04/01/2015 6:55 PM.