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Old 09-14-2016, 02:17 PM   #1
Kirbsterbbq
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Join Date: May 2016
Location: Stacy, Minnesota
Posts: 1
Default Zenith 124 1/2 T.O. Carb

Greetings all!

I am looking for parts for my 124 1/2 carb, I did rebuild it once but i used other Zenith carbs off Model B cars.

What I am looking for is larger jets and venturi.


My parts catalog says the following jets are to be installed


Compensator No. 23
Venturi No. 24
Idling Jet No. 12
Cap Jet No. 23
Main Jet No. 25

This Carb is on a 1935 Twin City Tractor.
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Old 09-14-2016, 02:32 PM   #2
ursus
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Join Date: May 2010
Location: Oregon
Posts: 1,051
Default Re: Zenith 124 1/2 T.O. Carb

I think you will want the # 19 main jet from a Model A or #20 from a Model B. Your 24mm venturi is plenty wide as the Model A was 20mm and the Model B was 22mm. The largest venturi I have seen that would fit that carb was a 26mm. Zenith even made some for the 124 series carbs as narrow as 15mm or 17mm, for low speed stationary industrial engines.
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