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05-08-2024, 06:14 PM | #1 |
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Gas under carbs on manifold
About 350 miles on my build. I’m noticing it looks like gas is leaking out of the carbs onto my manifold. Is this a float issue? New genuine stromberg 97’s. Fuel pump is a stocker rebuilt by me.
IMG_4720.jpg IMG_4721.jpg
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05-08-2024, 06:22 PM | #2 |
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Re: Gas under carbs on manifold
Have you checked your fuel pressure? These carbs don't like anything over 2-2 1/2 psi.
How does it run? |
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05-08-2024, 06:30 PM | #3 | |
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Re: Gas under carbs on manifold
Quote:
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05-08-2024, 06:39 PM | #4 |
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Re: Gas under carbs on manifold
Runs great. I haven’t checked the pressure yet as honestly…I don’t know how while running?! But I do have the tool. Probably time to check.
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05-08-2024, 06:47 PM | #5 |
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Re: Gas under carbs on manifold
Check its not leaking from the "access to jet screws" at the bottom of the float chamber.
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05-09-2024, 12:21 AM | #6 |
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Re: Gas under carbs on manifold
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05-09-2024, 01:07 AM | #7 |
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Re: Gas under carbs on manifold
I was going to guess the jets plugs too. It does not look like it has too much fuel pressure and it's overflowing out the top of the carb, it's nice and clean up there. It's something down below, should be easy to find the leak.
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05-09-2024, 11:19 AM | #8 |
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Re: Gas under carbs on manifold
Agreed with the area by the jet screws. While running, take a clean paper towel and wipe around those areas. If you have gas on the paper towel, you found the leak.
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05-09-2024, 02:24 PM | #9 |
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Re: Gas under carbs on manifold
My hunch is also the Jets. If my float was too high or the fuel pressure too high I’m assuming it would leak out the top? It’s definitely leaking from the bottom. Both carbs though. Should I be using sealer on the jet threads?
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05-09-2024, 02:28 PM | #10 |
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Re: Gas under carbs on manifold
You shouldn't have to, but may need to. Have you called Stromberg? Those carbs looks brand new and I know they aren't cheap.
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05-09-2024, 02:30 PM | #11 |
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Re: Gas under carbs on manifold
NO, it might be leaking from those or 1 of those 3 caps at the bottom of the bowl. Just a sealer that gasoline won't affect on those gaskets.Just squeeze a bit on your finger and wipe it on each side.Stromberg in UK recommended Hylomar blue so bought it off Amazon.
Last edited by deuce lover; 05-09-2024 at 03:12 PM. |
05-09-2024, 03:32 PM | #12 |
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Re: Gas under carbs on manifold
Jet screws. They could have put a patent on that leak.
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05-09-2024, 05:04 PM | #13 |
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Re: Gas under carbs on manifold
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05-09-2024, 06:17 PM | #14 | |
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Re: Gas under carbs on manifold
Quote:
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The only thing nice about being imperfect is the joy it brings to others.... "Silver rings, your butt! Them's washers!" "We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969 https://www.youtube.com/watch?v=7NReUd2_0u0 |
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05-10-2024, 08:44 AM | #15 |
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Re: Gas under carbs on manifold
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05-10-2024, 11:08 AM | #16 |
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Re: Gas under carbs on manifold
That Hylomar is a great product.
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05-11-2024, 08:14 PM | #17 |
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Re: Gas under carbs on manifold
Hylomar was developed by the R.A.F. for fixing persistent fuel leaks in the Rolls Royce/ Merlin Spitfire aircraft engines during WWII. You might say it helped win the war!
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