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djlanier · 05-21-2019, 04:52 PM

Jerry in Shasta, is the port in the upper casting? Is this the same thing Sparky mentioned as the idle passage? I haven’t identified it with my drawings. There is an opening in the throat just above the throttle plate but it’s closed with a small brass screw.

30 closed cab PU, it will idle slow enough that GAV doesn’t affect it. And Bob C I had read on here to leave GAV closed, it even starts well closed.

I have a good Model A Zenith but would really like to get “B” adjusted properly. I bought it on Ford Barn and had it professionally rebuilt locally. It ran well on his dynamometer.

05-21-2019, 04:52 PM	#14
djlanier Junior Member Join Date: Oct 2014 Location: Prosper,Texas Posts: 22	Re: Need Help with Model B Carb Jerry in Shasta, is the port in the upper casting? Is this the same thing Sparky mentioned as the idle passage? I haven’t identified it with my drawings. There is an opening in the throat just above the throttle plate but it’s closed with a small brass screw. 30 closed cab PU, it will idle slow enough that GAV doesn’t affect it. And Bob C I had read on here to leave GAV closed, it even starts well closed. I have a good Model A Zenith but would really like to get “B” adjusted properly. I bought it on Ford Barn and had it professionally rebuilt locally. It ran well on his dynamometer.