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1941 AC B (Zenith) carb

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farmerwannabe

11-13-2005 08:12:45




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Well, I got the carb. off our B and WOW, was the bowl nasty. There was a big piece of scale clogging one of the jets (I was able to see that right away after taking the halves apart) and the float needle was sticking closed. I think this carb is definitely in need of some help!




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Steve in N.J.

11-14-2005 06:06:22




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 Re: 1941 AC B (Zenith) carb in reply to farmerwannabe, 11-13-2005 08:12:45  
I do a lot of carb rebuilding for our tractor customer's and you would be surprised at what you find in those old carbs. If there was a lot of condensation or water in the fuel tank, that contributes to the rust and scale that's in the carb. Cast iron and water make rust. Let it set for quite a few years, and you have rusty muck! I glassbead all of our customer's carbs that I do in and out. The Marvel carbs get a little worst than the Zeniths because of passage design, so you have to spend a little more time glassbeading inside them. A good carb rebuild kit and yer' ready to go. Float level is super important too! Make sure it is correct. I also burnish the needle valve shank with super fine steel wool to make sure the valve works smoothly in the seat bore.... Good Luck and have fun!
Steve@B&B

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farmerwannabe

11-13-2005 14:39:23




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 Re: 1941 AC B (Zenith) carb in reply to farmerwannabe, 11-13-2005 08:12:45  
Well, I guess you were right...a rebuild WAS a good idea! lol
Is there anything I should coat the inside of the bowl with? Since I have to run this out of gas to shut it off, the bowl's always empty.



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BCnT

11-13-2005 20:20:42




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 Re: 1941 AC B (Zenith) carb in reply to farmerwannabe, 11-13-2005 14:39:23  
cant you just pull choke to kill it?
if i remember rite you got a mag? theres got to be something not making contact in your kill circuit...should be a little bolt coming out the side of mag with insulators with a wire going to kill switch...if all that is there hook a jumper wire to frame and touch it to that bolt...if that doesnt kill it pull cap and make sure theres a strap going from points to bolt and connections are clean.

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old

11-13-2005 16:56:58




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 Re: 1941 AC B (Zenith) carb in reply to farmerwannabe, 11-13-2005 14:39:23  
Nope theres nothing that I know of that you could coat it with and still have it work for you. If your worried about it just turn the gas off to stop it, then turn it back one for a little and then turn it off again.



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old

11-13-2005 10:02:55




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 Re: 1941 AC B (Zenith) carb in reply to farmerwannabe, 11-13-2005 08:12:45  
Guess you now see why we said to rebuilt the carb, LOL. Thats sort of a common problem with carbs and a tractor that has sat for any lenth of time.



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BCnT

11-13-2005 11:33:49




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 Re: 1941 AC B (Zenith) carb in reply to old, 11-13-2005 10:02:55  
hehehehehehe...siccem old
just to add a little...if you got access to a small sandblaster or better yet a bead blaster. those cast iron carbs work so much better with all the scale gone...vats are good but they dont get it all.



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mace56

11-13-2005 17:03:01




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 Re: 1941 AC B (Zenith) carb in reply to BCnT, 11-13-2005 11:33:49  
I have had that trouble with my other small engines. Does a little in-line filter help much? Guess I assumed most of it flakes come out of the tanks. You say the iron carbs also contribute?



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BCnT

11-13-2005 17:10:00




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 Re: 1941 AC B (Zenith) carb in reply to mace56 , 11-13-2005 17:03:01  
the carbs dont usually flake unless they sit a LONG time...reason i blast mine is to get the crud layer out of bowl...alot of times the residue-surface rust combine and make a whole layer that the float rubs on and generally changes flow in passages...blastin em once every 40 years or so seems to help ;)



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farmerwannabe

11-14-2005 04:18:52




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 Re: 1941 AC B (Zenith) carb in reply to BCnT, 11-13-2005 17:10:00  
Well, stands to reason this would have scale then...it sat for about 25 years (indoors) then was bought and used once in a while to push snow by the person I bought it from. They said the carb was rebuilt, but it looks like they put new gakets on and called it good.



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Dick L

11-14-2005 11:42:15




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 Is That Not The Only Way Even in reply to farmerwannabe, 11-14-2005 04:18:52  
To rebuild a tractor for resale! With a can a paint and a brush! (Completely Restored, Runs Good, (Smokes)) ( Low Hours Since Overhaul, Runs Great, (Slight Knock))
If you have watched the adds you probly saw some adds that looked like the above.
I bought an Oliver 77 at 11:00pm with a flashlight that had a dead battery. Story was that it had a complete overhaul. When I went back to pick the tractor up it started right up.Loaded it up but when I went to use the tractor after it sat in the yard for a week it had a slight knock.
The young fella looked honest, sounded honest, had three stair step, cute little girls, by his side. He held the flashlight while I wrote him a check. How could every thing he told me about the (restoration) not be true. He forgot to tell me about the brakes not working. Bout lost it loading it. If I ever get to meet and talk, ask me about the dead horse. It is a story that says it all about trading.

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farmerwannabe

11-14-2005 14:57:56




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 Re: Is That Not The Only Way Even in reply to Dick L, 11-14-2005 11:42:15  
Wow Dick...sounds like you"ve got quite a bit of experience with getting "rebuilt" tractors! I think this is a similar story. I"m really happy to have it, BUT it takes some tinkering to get it going now and again, that"s for sure!



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mace56

11-13-2005 17:02:47




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 Re: 1941 AC B (Zenith) carb in reply to BCnT, 11-13-2005 11:33:49  
I have had that trouble with my other small engines. Does a little in-line filter help much? Guess I assumed most of it flakes come out of the tanks. You say the iron carbs also contribute?



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