The Ford Barn

Standing Elk · 11-23-2017, 08:08 AM

I got a carb. kit for my Zenith-3 carburetor. All parts fit as they should with the exception on the GAV needle. The one that came in the kit was slightly longer (from the threads to the end of the needle) and would not thread into the sleeve. Anyone know what might be an explanation for this other than it was the wrong part? In looking at Zenith carb. kits I see no mention of any differences.

Mike Peters · 11-23-2017, 09:04 AM

Where did you buy your carb rebuild kit? Can you simply reuse your old GAV needle? In my experience, most aftermarket Zenith jets are drilled a bit large, resulting in a rich mixture of air and fuel. These aftermarket jets can be flow tested for accurate fuel delivery and resized. It's a pretty technical process. Renners Corner sells flow tested jets for our Zenith carburetors.
http://www.rennerscorner.com/carburetor.html

100IH · 11-23-2017, 11:37 AM

It sounds like the needle is not assembled into the outer sleeve, I can't tell. If it is, unthread it or back it out and it will be shorter. Compare the take out parts and figure what is wrong. Nothing wrong with using the old part or parts.

Tom Wesenberg · 11-23-2017, 11:47 AM

Have you got the needle pushed past the small steel tension ring at the end of the housing?
If not, use a drop of oil and give it a good push.

Standing Elk · 11-23-2017, 12:02 PM

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Tom, thanks. I did not get forceful at all and most likely did not get the needle pushed past the retainer. The old one just more or less fell right in so I did not know that the new one might need a little persuasion. I will give er a try. Thanks

11-23-2017, 08:08 AM	#1
Standing Elk Senior Member Join Date: Aug 2017 Location: St. Maries, Idaho Posts: 162	Zenith carb question I got a carb. kit for my Zenith-3 carburetor. All parts fit as they should with the exception on the GAV needle. The one that came in the kit was slightly longer (from the threads to the end of the needle) and would not thread into the sleeve. Anyone know what might be an explanation for this other than it was the wrong part? In looking at Zenith carb. kits I see no mention of any differences.

11-23-2017, 09:04 AM	#2
Mike Peters Senior Member Join Date: Aug 2012 Location: South East Wisconsin Posts: 1,279	Re: Zenith carb question Where did you buy your carb rebuild kit? Can you simply reuse your old GAV needle? In my experience, most aftermarket Zenith jets are drilled a bit large, resulting in a rich mixture of air and fuel. These aftermarket jets can be flow tested for accurate fuel delivery and resized. It's a pretty technical process. Renners Corner sells flow tested jets for our Zenith carburetors. http://www.rennerscorner.com/carburetor.html

11-23-2017, 11:37 AM	#3
100IH Senior Member Join Date: Dec 2011 Location: SW Idaho Posts: 970	Re: Zenith carb question It sounds like the needle is not assembled into the outer sleeve, I can't tell. If it is, unthread it or back it out and it will be shorter. Compare the take out parts and figure what is wrong. Nothing wrong with using the old part or parts.

11-23-2017, 11:47 AM	#4
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Zenith carb question Have you got the needle pushed past the small steel tension ring at the end of the housing? If not, use a drop of oil and give it a good push.

11-23-2017, 12:02 PM	#5
Standing Elk Senior Member Join Date: Aug 2017 Location: St. Maries, Idaho Posts: 162	Re: Zenith carb question Sponsored Links (Register now to hide all advertisements) Tom, thanks. I did not get forceful at all and most likely did not get the needle pushed past the retainer. The old one just more or less fell right in so I did not know that the new one might need a little persuasion. I will give er a try. Thanks