MTFCA Forum

This Zenith Carb is Patented Dec 29, 1908. I have never taken it apart but it sounds like it has a brass float in it. On the side is cast 04 and to the right of that i stamped F5988 and a 0 laying sideways. The throttle plat is not the normal tin plate but a tapered brass disc that is a little over 9/64 thick.
It looks like there may have been an air filter that went on it. Below the choke there is a band with a slotted and knurled headed machine bolt with a nut. This band can be turned to open or close a slot on either side that is slightly less than 1/2 inch high and about 1 inch long. the thread at the throttle is just under 1 11/64. The bolt holes are 5/16 NC. There is very minimal wear in the throttle and Choke shaft. the choke has a very strong spring under the lever.
Anyone have an Idea what it may have been used on as it is an updraft or know anyone looking for one. Like a lot of other things it has been in my attic for at least 30 years.

There were available aftermarket for Model T. They came with a special manifold, too.
They may have been used on Che^rolet in the teens.

Special manifold for 04 Zenith carberator Craig.

Since its an updraft carb the "special" part of the manifold was to clear the generator.
The 04 was original equipment on some Chevy & Essex models.
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This manifold made many years ago with a boss to accommodate Model T linkage. There are also original (aftermaket?) manifolds like it without it. --
Helpful documentation 04 Brochure https://www.mtfca.com/discus/messages/3 ... 1373409689