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Old 03-30-2015, 12:51 PM   #21
OLD...BILL
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Default Re: fuel pressure?

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Originally Posted by Rand View Post
Here is a picture of the cheep'o gauge that i got at Autozone showing 5+ psi of fuel pressure...would that cause my freshly rebuilt carb to leak?
and a picture of the leak itself in a mirror looking up
Thanks a bunch for your thoughts
Randy
YOUR FUEL PUMP is getting ready to give it up ..... the diaphragm is; old, hard, and can't flex as needed to pump at lower pressure.....so this is where to high pressure is coming from... it will soon break, ...look for it....get the pump rebuild by one of the "fordbarnrs", that do pumps......OLD....BILL
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Old 03-30-2015, 01:24 PM   #22
Mart
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Default Re: fuel pressure?

Does that type of carb use an adaptor and a weatherhead type fitting? Not a ford nut type fitting? I'm only familiar with regular 94 type carbs.

Sorry no direct experience, but here's some input anyway.

Brakes don't leak from the fittings with a thousand plus psi applied to them. If the fuel is leaking from the fittings it is not because of the 5psi pressure. It is because of faulty fittings.

If the fuel is overcoming the needle valve and then subsequently leaking down the carb and dripping off the fittings, then it is either the needle valve faulty or excessive fuel pump pressure.

FWIW I have had success using an older weaker spring in an otherwise newer pump to overcome a fuel pressure problem. I have also swapped more modern needles out for steel tipped needles to stop leaks too.

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Old 03-30-2015, 06:46 PM   #23
Rand
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Default Re: fuel pressure?

Yes ...both pump and carb were rebuilt by Barner "ken ct".
which I highly recommend. He definitely went the extra mile for me. I got a Mr. Gasket fuel regulator in the mail just today to drop the pressure down to 2.5 lbs at
ken ct. suggestion. He also suggests a total tune up in hopes to cure the slight hesitation that l have.
Randy
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Old 03-31-2015, 01:43 AM   #24
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Default Re: fuel pressure?

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Originally Posted by Rand View Post
Yes ...both pump and carb were rebuilt by Barner "ken ct".
which I highly recommend. He definitely went the extra mile for me. I got a Mr. Gasket fuel regulator in the mail just today to drop the pressure down to 2.5 lbs at
ken ct. suggestion. He also suggests a total tune up in hopes to cure the slight hesitation that l have.
Randy
Randy,
In post #13 you said the pump wasn't rebuilt? Now it was?
If Ken rebuilt both, ask him about your leak, maybe an easy fix, as you have said "it was doing the same before it was rebuilt"
Martin.
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Old 03-31-2015, 08:42 PM   #25
Rand
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Default Re: fuel pressure?

Yes...he ended up rebuilding both..his recommendation is to install a fuel pressure regulator and bring pressure down to
2 1/2lbs and to loose the electrical pump which I only use on start ups. Randy
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Old 04-01-2015, 07:39 AM   #26
scooder
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Default Re: fuel pressure?

2 1/2 pound is to low for your carb, you were given the pressure for the Merc carburetor earlier, it ain't a 97.
Why don't you pop the lid of to see what the actual problem is?
You should not need a regulator, if the pump is to spec, I know your little gauge says 5, but those little cheap ones arnt that accurate. The carb has a fiber washer up the top where the needle valve goes in. It's not uncommon for the 885 To leak there.
Good luck,
Martin.
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