Help needed with a Zenith B carburetor
 

City: Johannesburg

State: South Africa

I took the float and needle and seat out of my 1930 Sport Coupe Zenith 'B' carburettor, and when I put it all back together, I can't remember which way the spring goes to hold the float up. Now I have fuel leaking out of the carburettor - can anyone shed some light on which way the spring goes please?
Here are some pictures of how it is assembled right now:
Attachment 110880
Attachment 110879

Re: Help needed with a Zenith B carburetor
 

Don' take this as gospel, but it looks like that spring arm that is in the lower right of the picture should go underneath the pivot rod and should be located on the backside right behind the nub there on the float arm..... JMHO

Re: Help needed with a Zenith B carburetor
 

Hello and greetings,

My understanding is that the spring and baffle are only needed if you are using a fuel pump, if gravity feed then you can leave it off, I could not find a good picture that shows the correct placement of the spring,

Post this on the discussion section, there are many folks there familiar with the B carb.

Regards Brian T.

Re: Help needed with a Zenith B carburetor
 

Merry Christmas from Alaska,

Joop was kind enough to post a link to this post on the Fordbarn Model A discussion forum, here is a link to that post:

https://www.fordbarn.com/forum/showthread.php?t=92755

I do not use this spring on the Model B carburetor on my Model A. The pressure of the fuel in the bowl against the float is what stops the fuel from flowing. Seems to me you have one of two problems:

Either your needle and seat are not sealing due to wear or dirt
or
Your float is set to high and the fuel is overflowing.

Here are a couple of links to Fordgarage which show details of the Model B Carburetor, thanks to Vince Falter.

http://www.fordgarage.com/pages/bcarbuppercastings.htm

http://www.fordgarage.com/pages/bcarbdiagram.htm

Hope this helps, and let us know on the discussion board.

Darryl in Fairbanks

Re: Help needed with a Zenith B carburetor
 

On both my B engined A,s,I dont use the spring on float pin.

Re: Help needed with a Zenith B carburetor
 

I do that kind of shit all the time! Now I take quick cell phone picts of stuff I'm taking apart for reference. A little late, but good for your next endeavor.