Mystery Screw Needs ID, Please

[Greg Greer]

1966 Porsche 912 with 1968 engine. We have these ports coming off the inside-side of the manifolds. Each one has what seems to be hardened rubber tube (not sure if it was always hard or if it's just hardened with age) ending in a screw coming off of it. You can see pictures of it with and without. It's not actually part of the carb. I can't locate it in either of our manuals (912 Handbook and Clymer). Our best guess at this point is something to do with the primitive emissions system. Does anyone know?

[Glenn]

Its a plugged vacuum port for the vacuum retard of the 061 distributor.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"

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[mtnroads]

Back in the 80"s " I think it was the 80's" here in cali to meet smog we had to install a "nox" reduction kit. Seems to me it had a vaccum plate like this as well. "I knew I was going to miss those brain cells"
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pax
No Good Deed Goes Unpunished....