Mystery carb spacer

[dmtfab]

In the middle of tearing down my 6/76 china/OEM hydrid carb to clean it and I think I have some home brew tech that the PO added. There is the OEM phenolic carb spacer with the heat shield and then this mysterious spacer with mesh strainers/filters:

The text in the top says “TOP FRT” and “HC24 HC” I am almost certain it is the source of vacuum leaks that I am fighting and that it doesn’t belong. You can see that the hole pattern has been modified to fit. I can’t find any info online regarding a 2 barrel spacer/insulator/gasket with HC24. I see some Kohler gaskets with the center cut out like this, but nothing that is an exact match.

I am planning on tossing it in the trash unless someone can make sense of it before I do.


Thread about carb I am rebuilding:

Post in thread 'Aisin/Chinese carburetor hybrid rebuild kit?'

Aug 6, 2026

The metal tag H3662 is the Aisan number for the 21100-61012 world carb and all the aftermarket Chi-carbs use that number. Looks like someone used the Air Horn from the old Aisan carb on the CCP replacement so they could hook up the fuel return line. The CCP 61012 carb wouldn't have that fitting.

Any late 2F kit should work fine. The gaskets are the same. Jets will differ depending on kit and if it even contains jets. Personally, I like the kits that have the leather plunger, which is actually more durable than the Viton when using ethanol-gas . It really takes two different...

• dmtfab

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[charliemeyer007]

I have one under my Rochester 2 bbl, it was given to me so I put it on back in like 83. It was a Man-a-fre product. Someone posted a pic from their catalogue with all the "claims"

My opinion, more mixing of air/fuel can't hurt. The rig came with a Delco mechanical advance distributor. With the header I put on after the cast iron manifold cracked in half, I got 25 miles per gallon doing a 100 miles on the freeway at 55 mph and 100 miles idling along in first and second gear road road hunting. 100's of trips over several years - gas up to the cap - do the run, gas up to the cap again at the same pump - 4 gallons more or less every time.

I never changed the carb settings from the PO. In warmer weather the timing is jack up to just going out the window.

The Delco finally wore out, so I put on a chinesium one from Amoron. Last I checked I was at 15/17 mpg. I need to do some carb work

 

[timmyisinthewell]

Good call Charlie.

 

[dmtfab]

You guys are impressive!

I guess I’ll keep it out of the trash. Probably not going to reinstall it though. The little metal tab that is bent over is giving me a vacuum leak and the spacer is deteriorating at the holes.

Thanks for the info

 

[charliemeyer007]

I had a friend that tried to make one out of metal window screen - it didn't last very long, just sort of dissolved away.
I seem to recall they used Tungsten wire. I'm almost ready to do some carb work so I'll look at it.