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Old 06-07-2010, 06:46 PM   #1
Richard in PA
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Default need B carb help info

I installed a B carb with intake bored out to the B size, sounds great but the carb float valve leaks. Does someone make a modern valve like for the
A carb or what can I do? Thanks Richard
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Old 06-07-2010, 07:38 PM   #2
Jim Parker Toronto
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Default Re: need B carb help info

The Zenith A is not the same. Some people recommend removing the spring from the float, and get a Viton (sp) tip. Try Dave Renner, he has parts for the B.....

Last edited by Jim Parker Toronto; 06-07-2010 at 08:33 PM.
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Old 06-07-2010, 09:01 PM   #3
Jim Parker Toronto
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Default Re: need B carb help info

Dave Renner @ Renner's Corner
10320 EAST AUSTIN ROAD
Manchester, Michigan 48158-9545

[email protected]

1-734-428-8424 Phone
1-734-428-1090 Fax
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Old 06-08-2010, 09:04 AM   #4
Richard Lorenz
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Default Re: need B carb help info

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Original needles for both A and B carburetors can often be reseated by using a needle-nosed pliers to press on and rotate the needle. Move the needle position and rotate some more. I use penetrating oil on the seat while I do this. Some people rotate the needle with a drill while pressing, but I think that this would be a little rough. Some people tap on the needle to help re-seat it.

Make sure that the float is pressing the needle straight up and not to the side. About 70% of the needle valves will clean up with the above method. I use a hand-operated vacuum pump and gauge to check for leaks. This is the same pump that can be used to help bleed hydraulic brakes.
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