MTFCA Forum

What can any knowledgeable person tell me about A Zenith updraft carburetor marked with an )$ cast into the body followed by a stamped number and a Zenith updraft carburetor with a casting of S4BF? Also, what were Stromberg MB-1 carbs used on, originally, and finally, has anyone had any experience runing a Mayer brand carburetor and intake?

The Stromberg MB-1 was original equipment on the Cleveland 6 model 40 cars. The earlier overhead valve engine . Not sure about the
later flathead engine.

Can you post a picture of the mystery Zenith? I haven't seen ")$" on a casting, but I've only studied them for a few years. Could it be "O4" or "O5" with 100 years of wear and tear? O4s came on Chevrolet 490 and probably a number of obscure cars.

Zenith S4BF is a darn good carb from everything I've heard. Zenith sold them with a matching manifold for Model T. See this thread: http://www.mtfca.com/discus/messages/33 ... 1381924692

The brass and cast iron Zeniths seem to really only have two problems: the pot metal venturis swell with age and can crack the casting, and you fine tune the mixture by changing out the jets. Since your friendly Zenith dealer doesn't stock jets for 100 year old carburetors anymore, Stan Howe makes an adjustable main jet now.

I found a couple applications for Stromberg MB-1 aside from Cleveland; Metz around 1919 and a couple obscure trucks. Later Clevelands used a Stromberg OS-1.

I love researching 1920s carburetors, let me know if I can help more.