The Ford Barn

LizardsA · 12-25-2012, 05:11 AM

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:
photo.jpg
photo(1).jpg

ctlikon0712 · 12-25-2012, 01:52 PM

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

Brian T · 12-25-2012, 02:09 PM

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.

darrylkmc · 12-25-2012, 04:20 PM

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

columbiA · 12-26-2012, 12:31 AM

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

Banky · 12-26-2012, 09:38 AM

Sponsored Links (Register now to hide all advertisements)

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.

12-25-2012, 05:11 AM	#1
LizardsA Senior Member Join Date: Oct 2012 Location: Randburg, Johannesburg, South Africa Posts: 225	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: photo.jpg photo(1).jpg

12-25-2012, 01:52 PM	#2
ctlikon0712 Senior Member Join Date: Feb 2011 Location: Cocoa, Florida Posts: 1,609	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 __________________ Wanted: Simmons Super Power Head Craig Likon 1931 150B

12-25-2012, 02:09 PM	#3
Brian T Senior Member Join Date: May 2010 Location: San Diego,Ca Posts: 1,377	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. __________________ Nothing can be made foolproof, ---- fools are ingenious bastards.

12-25-2012, 04:20 PM	#4
darrylkmc Senior Member Join Date: Nov 2010 Location: Fairbanks, Alaska Posts: 767	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

12-26-2012, 12:31 AM	#5
columbiA Senior Member Join Date: Nov 2011 Location: B.C. Canada Posts: 1,746	Re: Help needed with a Zenith B carburetor On both my B engined A,s,I dont use the spring on float pin.

12-26-2012, 09:38 AM	#6
Banky Senior Member Join Date: Sep 2011 Posts: 201	Re: Help needed with a Zenith B carburetor Sponsored Links (Register now to hide all advertisements) 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.