#1  
Old 06-05-2022, 11:57 AM
CraigG.'s Avatar
CraigG. CraigG. is offline
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Default Loose mixture screws in metering block

Hey everybody,

Concerned about vibration affecting mixture screws as they turn very easily.

What you guys doing so they don't change setting through vibration?

Thanks again, Craig

  #2  
Old 06-05-2022, 12:05 PM
"QUICK-SILVER" "QUICK-SILVER" is offline
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Old school Holley?

Replace the cork gaskets.

Clay

  #3  
Old 06-05-2022, 12:45 PM
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Appears as Old-school Holley. Seems that metering blocks are from Mark Sullens – Did not come with cork gaskets – even though came from Mark Sullens E85 build.

Nothing against Mark – He works hard and does good work.

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Old 06-05-2022, 12:46 PM
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Where do you get cork gaskets?

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Old 06-05-2022, 01:07 PM
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They come in most Holley rebuild kits. I'd check and see if he omitted them due to E85 compatibility. I think it's ok, but there could be some reason... I may have some laying around I'll see.

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  #6  
Old 06-05-2022, 01:20 PM
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Holley shows cork and nylon. I've never used the nylon.

https://www.holley.com/products/gask...arts/26-110-10

https://www.holley.com/products/gask...ontent=Gaskets

Clay

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Old 06-06-2022, 08:06 AM
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mark sullens metering blocks are primarily E85. Are you sure the bowl are marled sullens and maybe the metering blocks are holley, for normal gas? what is your application. as others have said i would replace the mixture screw gaskets.

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  #8  
Old 06-06-2022, 10:12 AM
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Since we have had at least 10% ethanol in the pump fuel for years on Holley street
carbs, and the cork gaskets seem to last for a good while.

And since Holley has sold alcohol carbs for several years, and people have probably
used the cork gaskets on those metering blocks for a period of time, I would just try the
cork and see it it meets your needs.

Tom V.

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  #9  
Old 06-06-2022, 11:27 AM
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Put a short lenght of 8 or so pound test fishing line in each hole and reinsert the mixture screw, the line will act like a nylock , heck even unwaxed dental floss might be big enough to work!

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  #10  
Old 06-08-2022, 11:46 AM
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Hey Guys - all good ideas.
Emailed Mark - he said he used vinyl tubing.
Ordered the Quick Time vinyl gaskets - hopefully fit as correct size (diameter screws) for the billet blocks.
Thanks Again and Good Racing!
Craig

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