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Farmall & IHC Tractors Discussion Forum
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C Carb.. Need Help!!

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K-Mo

06-27-2005 17:11:53




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My Farmall C has a Zenith Carburetor (IH 375560R91, Zenith 12613A). It worked good for several years until one day the float valve would not shut off. I rebuilt the carburetor with confidence only to have fuel run out on my boots. The only way I have been able to get it to shut off is to install a different bowl assembly. Its the wrong bowl and can not be used as a replacement. For test purposes, it would indicate the float valve is functioning and the problem is caused by the original bowl assembly. I can find nothing wrong with the bowl. I set it on the bench and filled it with gas to see if it was leaking internally. It doesn't. I can't find any float interference. I removed the bowl drain plug and could see that the float was moving freely inside. There isn't any interference with the gasket. I've had this thing apart 50 times. Can someone please slap me up side the head with a simple answer?

Signed,
Lost & Frustrated

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504

06-28-2005 19:52:49




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 Re: C Carb.. Need Help!! in reply to K-Mo, 06-27-2005 17:11:53  
K-MO,I just went thourgh this with a 504. The needle valve doesn`t have enough side clearance between the valve and the seat,a small file and some emery cloth and it will stop the leak.I can not take credit for this fix,I got it from an old carburetor man in town.I almost fogot, make sure that the wire clip that holds the needle valve to the float is there and hooked up. kjm



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Peabody

06-28-2005 10:35:34




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 Re: C Carb.. Need Help!! in reply to K-Mo, 06-27-2005 17:11:53  
My first thought would be gas inside the float, making it "waterlogged." If you shake it and hear liquid, it's got a pinhole in it and is not floating properly to engage the needle valve.



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