The Ford Barn

Ron Pilger · 06-02-2010, 05:25 PM

Hello experts. I have just rebuilt my stock 32 4 cyclinder carb. The end result is a mixture significantly too rich. What should I try? Thanks.

ursus · 06-02-2010, 09:48 PM

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Did you rebuild the carb with the new jets available from most suppliers? These typically flow waaay too much fuel. Best to use cleaned up originals.

Also, can you notice the changes resulting from small adjustments of the GAV? If not, then the valve seat drilling in the lower casting may be worn wider than the maximum 0.125 inches. In this event, your carb will always run more or less on the rich side because it allows too much fuel into the main jet - cap jet network. Unlike the Model-A carb, the B-carb was designed for the GAV to be completely closed after warm-up.

06-02-2010, 05:25 PM	#1
Ron Pilger Senior Member Join Date: May 2010 Location: Camrose, Alberta Posts: 396	model B 4 cyclinder carb adjustment Hello experts. I have just rebuilt my stock 32 4 cyclinder carb. The end result is a mixture significantly too rich. What should I try? Thanks.

06-02-2010, 09:48 PM	#2
ursus Senior Member Join Date: May 2010 Location: Oregon Posts: 1,374	Re: model B 4 cyclinder carb adjustment Sponsored Links (Register now to hide all advertisements) Did you rebuild the carb with the new jets available from most suppliers? These typically flow waaay too much fuel. Best to use cleaned up originals. Also, can you notice the changes resulting from small adjustments of the GAV? If not, then the valve seat drilling in the lower casting may be worn wider than the maximum 0.125 inches. In this event, your carb will always run more or less on the rich side because it allows too much fuel into the main jet - cap jet network. Unlike the Model-A carb, the B-carb was designed for the GAV to be completely closed after warm-up.