Re: Carburetor leak

Posted by Scott726 On 2008/1/10 13:05:07

Tom,

I will weigh in with my two cents. I have had a similar problem with a 1930 Chevy with an updraft carburetor and while it doesn't equate exactly to your problem it might help. The Chevy would gush gas out the air cleaner when the car was running. What I found was the "New" needle with a neoprene tip wasn't doing it's job and cutting off the gas flow at the seat. I changed back to the existing all metal needle and the problem went away. I was later told by a Chevy Guru that they don't like neoprene tipped needles.

You didn't say if you were running the original vacuum system or an electrical fuel pump. If you are running the vacuum system there is a lot of fuel above that needle. Were it my car I think I would pull the lid off the bowl, empty it, dry it out and use a rubber band or similar device to apply gentle upward pressure to the float (simulating the correct level of gas) and see what happens. That should help you to spot your leak. I hope this helps.

Scott