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Allis Chalmers Discussion Forum

My new AC

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Author  [Modern View]

04-23-2018 19:29:00

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Here is my new AC model B. Starts and runs fine now. But it has a zenith carb on it. Would I be wise to change out the zenith for a marvel Schebler, or just leave it as is. Like I said, it hand starts just fine now. If I swapped it, what MS would be correct. third party image third party image

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05-06-2018 21:13:22

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 Re: My new AC in reply to cowdog, 04-23-2018 19:29:00  
This probably deserves it's own thread. Are you looking for photos of carbs, linkage, or hydraulics?

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05-06-2018 18:32:20

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 Re: My new AC in reply to cowdog, 04-23-2018 19:29:00  
Just purchased one for my B. NO MANUAL! Can you please send me photos on how its mounted and the pulley setup. *I also cant figure out how to mount the hydraulic lift cylinder. Thank you very much for any help.:)

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04-25-2018 09:39:55

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 Re: My new AC in reply to cowdog, 04-23-2018 19:29:00  
The AC Carb addendum included in their manuals from the mid-50s doesn't discuss the MS carb at all for the B and C. It states Zenith 61AJ7 and 161J7.

I've owned several Bs, Cs and stationary versions ranging from 39 to 51, and have never had one with an MS carb (though all 3 CAs I've owned and both D14s had only MS carbs). I'm sure the MS may have been common since the parts manual does show the TSX-305 and TSX-154, alongside numerous variants of the Zenith for various fuel and RPM specs. If you have a Zenith, my guess is it's just as likely that that is what it came from the factory with. Even if it starts to have problems (common in ethanol times), I'd keep it, clean it well and put a kit in it rather than spend the money on a replacement of either brand.

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bjb in Tx from Ne

04-24-2018 14:13:35

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 Re: My new AC in reply to cowdog, 04-23-2018 19:29:00  
Both the zenith and MS Carb are correct for a "B" (either was available). Mine 1940 "B" has a Zenith and having rebuilt both brands I would replace MS carbs with Zenith if giving the chance.

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Traditional Farmer

04-24-2018 00:30:29

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 Re: My new AC in reply to cowdog, 04-23-2018 19:29:00  
Nothing wrong with those old Zenith carbs,if its running good leave it a lone.

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04-23-2018 20:58:54

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 Re: My new AC in reply to cowdog, 04-23-2018 19:29:00  
"Would I be wise to change out the zenith for a marvel Schebler"

Well, heck, WHY not?

If it's running well, WHY?

Oh, yeah, If it ain't broke, mite as well "fix" it 'til it is!

That being said, MS and Zenith were merged into "Zenith Fuel Systems", the surviving company.

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