The Ford Barn

Will Kimble · 04-05-2012, 04:48 PM

I have a Model B carb that is leaking and I am looking for some advice. The carb is leaking around where the choke rod goes in, after I shut the car off. I am looking at a carb drawing, and I think the fuel adjusting needle and adjusting needle housing are where the problem is.

Please let me know if you have any ideas for me to try. This evening I ran the car for 30 seconds or so after shutting the fuel off and that seemed to help.

Thanks,
Will Kimble

[email protected] · 04-05-2012, 04:59 PM

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

Maybe Vince's website will be helpful.

Crazydaddyo · 04-05-2012, 05:38 PM

The bowl vent is in that location. If your float is set too high, or if your float valve is leaking, that is were the fuel comes out.

.

Will Kimble · 04-05-2012, 07:59 PM

Hey Crazydaddyo, isn't the bowl vent more up towards where the two halves split? I am dry there, this is coming out of where the choke rod goes in. When I pull the choke rod, I can see the gas form into a drop there and roll down the carb.

On the Model A carb, the adjusting needle housing has flats on it so you can remove it with a wrench. On the B there is nothing, looks like it is pressed into the carb?

Thanks,
Will

Randy308 · 04-05-2012, 09:07 PM

Sponsored Links (Register now to hide all advertisements)

If you run the carb. with the GAV open, the gas will rise up inside the brass tube ( GAV) to the same level that your gas is set to, in the bowl. If the level in the bowl is set to 5/8" below the bottom of the body gasket then you should be approx 1/8" below the open end of your brass GAV tube. If the float level is set too high, then you will leak gas out of GAV, especially if you park on an incline. I would check the float/ gas level first.

04-05-2012, 04:48 PM	#1
Will Kimble Senior Member Join Date: May 2010 Posts: 165	Model B Carb Leak I have a Model B carb that is leaking and I am looking for some advice. The carb is leaking around where the choke rod goes in, after I shut the car off. I am looking at a carb drawing, and I think the fuel adjusting needle and adjusting needle housing are where the problem is. Please let me know if you have any ideas for me to try. This evening I ran the car for 30 seconds or so after shutting the fuel off and that seemed to help. Thanks, Will Kimble

04-05-2012, 04:59 PM	#2
[email protected] Senior Member Join Date: Aug 2011 Location: Illinois Posts: 730	Re: Model B Carb Leak http://www.fordgarage.com/pages/bcarbassembly.htm Maybe Vince's website will be helpful.

04-05-2012, 05:38 PM	#3
Crazydaddyo Senior Member Join Date: May 2010 Location: Orange, Ca. Posts: 197	Re: Model B Carb Leak The bowl vent is in that location. If your float is set too high, or if your float valve is leaking, that is were the fuel comes out. .

04-05-2012, 07:59 PM	#4
Will Kimble Senior Member Join Date: May 2010 Posts: 165	Re: Model B Carb Leak Hey Crazydaddyo, isn't the bowl vent more up towards where the two halves split? I am dry there, this is coming out of where the choke rod goes in. When I pull the choke rod, I can see the gas form into a drop there and roll down the carb. On the Model A carb, the adjusting needle housing has flats on it so you can remove it with a wrench. On the B there is nothing, looks like it is pressed into the carb? Thanks, Will

04-05-2012, 09:07 PM	#5
Randy308 Junior Member Join Date: May 2010 Location: Monrovia, California Posts: 7	Re: Model B Carb Leak Sponsored Links (Register now to hide all advertisements) If you run the carb. with the GAV open, the gas will rise up inside the brass tube ( GAV) to the same level that your gas is set to, in the bowl. If the level in the bowl is set to 5/8" below the bottom of the body gasket then you should be approx 1/8" below the open end of your brass GAV tube. If the float level is set too high, then you will leak gas out of GAV, especially if you park on an incline. I would check the float/ gas level first.