46 BN carb rebuild

Farmall B & BN Tractors, 1939-1947
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randyrothe
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46 BN carb rebuild

Postby randyrothe » Mon Jan 30, 2023 11:17 pm

I'd like to rebuild my 46 BN carb. The carb is stamped Zenith Made is USA, but I don't see a part number. Where is a good place to get a rebuild kit, what is the part number for the rebuild kit and are there any how to videos or manuals? Thanks

Bob McCarty
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Re: 46 BN carb rebuild

Postby Bob McCarty » Mon Jan 30, 2023 11:30 pm

McDonald Carb sells good rebuild kits. You probably don't need a complete one. I'd suggest disassembling and evaluating before you order. There is a Zenith manual under the Quick links, click on PDF Manuals, Service Manuals (bottom of the list), then Zenith carb. I don't think there is a video on the forum, maybe Youtube.
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Don McCombs
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Re: 46 BN carb rebuild

Postby Don McCombs » Tue Jan 31, 2023 7:59 am

The manual that Bob references is for a Cub. I don't know what yours looks like, but it's probably very similar. Some of the part numbers for the B carb will likely be different from the manual, however. Your best bet is to study the manual, then give Morgan a call at 706-367-4179.
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Gary Dotson
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Re: 46 BN carb rebuild

Postby Gary Dotson » Tue Jan 31, 2023 8:26 am

There’s really not a lot to that carb. As Don mentioned, it’s very similar to the Cub, some part numbers will be different. When you call, tell Morgan it’s a Zenith off of a B, he’ll know which carb model you have. I did one of these, a couple months ago, and needed only a good cleaning and a new bowl gasket, which I already had.


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