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Glad to help.
It's for keeping the RPM's up while the engine is cold. Kinda like an old fashioned choke.
You may want to try to buy an owner's manual for your car. They come up on Ebay quite frequently.
I found a lot of useful info in the manual for my SC. The original was long gone when I bought the car.
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1981 911SC ROW SOLD - JULY 2015
Pacific Blue
Wayne
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