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EFV-8 Club Forum / General Ford Discussion / 36 97 Stromberg gas leak

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Discussion Topic: 36 97 Stromberg gas leak -- page: 1 2

DEAN333

08-23-2012 @ 2:30 PM

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Gas is leaking thru the Accelerator pump hole after carb rebuild....I think I curled the leather edge of the pump so I ordered a new pump. I wanted to run this by the brain trust to get other opinions. I've had the pump out 3 times trying to gently re-insert it but believe the damage is already done.

TIM CARLIG

40 Coupe

08-24-2012 @ 4:58 AM

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Even with the curled pump, do you see a stream of fuel through the discharge nozzles when the pump is depressed? If not make sure the path of the fuel through the nozzles is open. there should be a felt washer on the accelerator pump shaft just under the hole in the die cast top, to prevent dirt from entering the hole. Make sure the float level is correct. The inside bore for the pump is clean and smooth, so the pump does not hang up and get damaged. You can take fine sandpaper or scotch bright to clean the bore.Unless the new leather pump is riped it should be OK if installed properly.

supereal

08-24-2012 @ 8:54 AM

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Leakage of old carbs is often due to warped diecast parts and/or worn areas, such as the accelerator pump bore. The 97 was plagued with leakage, even when new, leading the way to the 94. Summit Racing is offering a new Stromberg 97 with extra material in the airhorn casting to reduce leakage around the fuel bowl. They have a non-stick inlet valve, stainless steel levers and linkange, as well as reinforced nitrile gaskets for alcohol fuels. They aren't cheap, but for those wishing to replace a wornout carb, they would be an answer.

DEAN333

08-24-2012 @ 1:24 PM

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When I reinstalled the jets, they had slotted heads-no spewcial wrench needed, I stopped when they seated. Are the holes in the jets supposed to face forward, to the side or does it matter?

TIM CARLIG

40 Coupe

08-25-2012 @ 6:22 AM

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The 97 as Ford used on the 36, has one Power Valve with a slotted head (with a spring loaded metal pin in the center of the slot) it is under the accelerator pump. It has a gasket and there are four small holes on it's sides, their orientation is not important. It also has two main jets, Original style are installed and removed with a special wrench. They are located under the two (of three) outside large screws near the bottom of the main body of the 97. The 94 style of carb used much later (38-40's) has original style main jets that are installed with a screwdriver. The jets for the 94 can not be used on the 97. Both the 94 and the 97 main jets have one hole through the center end to end. Under the 97 main jets are emulsion tubes. During a rebuild both of the emulsion tubes MUST be removed to be cleaned and inspected for damage. If you go to the Stromberg web site you can see photos and descriptions of all the 97 internal parts as well as the special wrench.

DEAN333

08-25-2012 @ 7:59 AM

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I don't know how I missed it but when I had the carb disassembled I found nothing that needed a special wrench [though I bought one when I ordered the kit]. I only saw the two jets with holes running through with slotted heads. I will disassemble again when the new pump gets here.

TIM CARLIG

40 Coupe

08-26-2012 @ 6:04 AM

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A 94 style Carb can be run on a 36 engine, but their internal parts are not interchangeable. I would suggest you confirm your Carb type. Is there an embossed 97 on the side of the Carb? Does the Carb also have the numbers 67 embossed in the die cast body? Could you post a photo of the Carb? or post some of the numbers that are embossed in the Carb body and base?

DEAN333

08-26-2012 @ 10:56 AM

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Her is pic 1 0f 4

TIM CARLIG

DEAN333

08-26-2012 @ 10:57 AM

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Pic 2 04 4...

TIM CARLIG

DEAN333

08-26-2012 @ 10:59 AM

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Pic 3 of 4, EE-1 is stamped into body.

TIM CARLIG

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