Zenith carburetor identification

[johnbuckley]

Originally Posted by Joe K

Or possibly an Argentinian copy? There are absolutely PLAIN (no name) carbs that resemble Zeniths, are rough, and were made in Argentina. Joe K

Yes certainly were foreign variations - KC/Qualcast in UK, Japanese ones and Agentinian, and I'm sure there were others. Came across an Argentinian Zenith 2 last week that had all the vent holes of post June 1930 but with a brass GAV seat, and as you say a rough casting.

[Carb Guy]

It is possible that the mold did not get the "2" recessed in it, a production mistake.

[fiddlybits]

Maybe I'm missing something here but ....

Standards manual - Revised 2011 - Area 1 - page-13 - "ENGINE-Holey Carburetor Casting CHanges 1028-1931" - has only one entry for "ZENITH" in Raised Letters

-> December 1928 - Type 3.

[Richard Lorenz]

I have a raised "Zenith" and my friend also has one. His has the number 24 upside-down on the back side, and mine has 30 upside down. There is no lettering or number on the rim inside the bowl. The vent is 9/32 inch diameter. I am certain that it was built by Holley because of other characteristics.

I date it as being used in about October of 1928, following a short time when Holleys with no name on them (usually called Plain ones) were being produced.

[Joe K]

Originally Posted by Richard Lorenz

I have a raised "Zenith" and my friend also has one. His has the number 24 upside-down on the back side, and mine has 30 upside down. There is no lettering or number on the rim inside the bowl. The vent is 9/32 inch diameter. I am certain that it was built by Holley because of other characteristics.

I date it as being used in about October of 1928, following a short time when Holleys with no name on them (usually called Plain ones) were being produced.

Single or double venturi on those?

Joe K

[David31dlxslant]

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Maybe it's time I upgrade my judging standards, I have the 1997 revision and obviously they've done some updating that I'm unaware of, thanks for everyone's help

Hey fidleybits could you post a picture of that page you're referring to? Thanks

[Richard Lorenz]

The Holley-made "Zenith" that my friend and I have is a single venturi. The latest Judging Standard section on carburetors has quite a few errors in it.

[Steve Schmauch]

Hello--This carburetor was produced in late 1928 by Holley. Most were recalled and ground off, some have survived. I believe this labeling by Holley is what prompted Ford Motor Company to require all future carbs starting Jan 1 1929 to have Zenith-l bowl marking on Zenith carburetors and Zenith-2 bowl marking on Holley carburetors. If you would like more information on Zenith carb identification, please obtain recent issues of the Model A Ford club of America's bi-monthly publication The Restorer. Best regards, Steve Schmauch

[James G.]

According to Steve Pargeter book Restoration Guidelines version 7a, the brass secondary well along with the lower body marking ZENITH, the carb would be a Zenith built between July 1928 to early '29. Re.: page 34.

[Tom Wesenberg]

Originally Posted by James G.

According to Steve Pargeter book Restoration Guidelines version 7a, the brass secondary well along with the lower body marking ZENITH, the carb would be a Zenith built between July 1928 to early '29. Re.: page 34.

That's the only Model A carb book I have, and I think it's a good book to own.