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Old 11-02-2020, 03:23 AM   #1
vic
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Default Zenith carb

I am looking at restoring a model A Zenith carburetor......all the jets have been sheared off so before I drill and retap them can somebody advise me on the thread tpi ? Many thanks Vic
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Old 11-02-2020, 04:32 AM   #2
johnbuckley
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Default Re: Zenith carb

Good luck .. you may find retapping it a difficult task; one I try to avoid if possible!
Here is a table form Steve Pargeter's excellent booklet "Zenith Model "A" Carburetor Restoration Guidelines. I would also do a search on this forum for further info
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Old 11-02-2020, 11:44 AM   #3
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Default Re: Zenith carb

Possibly you can locate another rebuildable carb instead of investing in all those Metric taps,unless you already have them.
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Old 11-02-2020, 11:54 AM   #4
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Default Re: Zenith carb

https://www.model-a-autoparts.co.nz/
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Old 11-02-2020, 12:15 PM   #5
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Default Re: Zenith carb

You could also try Renner's Corner for Parts and kits. David is a good guy. He carries parts for Tilly's and Marvels also along with instructions.
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Old 11-02-2020, 12:26 PM   #6
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yes, but last time I tried Renners they didn't export small quantities, and it's not economic anyway to just geta few $$$ worth sent across the world ... see OP location
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Old 11-02-2020, 05:00 PM   #7
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Default Re: Zenith carb

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Originally Posted by johnbuckley View Post
yes, but last time I tried Renners they didn't export small quantities, and it's not economic anyway to just geta few $$$ worth sent across the world ... see OP location
Good point, my bad.
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Old 11-02-2020, 05:18 PM   #8
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Default Re: Zenith carb

Quote:
Originally Posted by vic View Post
I am looking at restoring a model A Zenith carburetor......all the jets have been sheared off so before I drill and retap them can somebody advise me on the thread tpi ? Many thanks Vic
I seems some ham fisted @#$% tried to do who knows what with the carburettor. I'm sure there will be someone in your local Model A club who has a better core for you or even one ready to go if you cross his palm with silver. I have several sitting in my shed. Postage would be considerable, though.
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Old 11-02-2020, 08:42 PM   #9
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Default Re: Zenith carb

5 mm-75 is the thread
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Old 11-03-2020, 01:46 AM   #10
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Default Re: Zenith carb

Thanks John...exactly what I wanted...purchased 5.75 medium tap today........ job done !
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