Technical Stromburg carb question.

I'm stumped. I rebuild Linkerts, Holly's, Rochester's, and all kinds of carbs, but never rebuilt a Stromburg, till today. It's just a carb, right? During that process, I found THIS on the bench, upon separating the lower ****erfly plate from the main body. I'm clueless. Part isn't even in the parts list diagram. Once done, don't I find a second one, on the floor.

Carb is back on and running fine. Leak and fuel drip is repaired. This is gonna drive me nuts ...

Stromburg AAV carb, model 7-90B, 2 bbl. Off a 1940 Buick Special, with a 53 263 in it.

 

Did you retain the starting circuit vacuum switch?

 

It's there, but wasn't hooked up when I got car. I didn't remove it.

 

Ok. Just read about it. That circuit is disconnected and gone, although switch is on carb. I have to turn a key, and then press a ****on. No pedal to start.

 

There are several different sizes of the idle channel wires, depending on the carburetor. They are number 106 in the diagram, part number 385362 for the 7-90 carb.

These help improve the atomization of fuel in the idle circuit, thereby making the idle circuit more efficient.

The engine will idle without them, idle better with them.

Jon