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  5. High Altitude Compensator

2150 Exploded
Some 2150, 2 barrel (later models) include a high altitude compensator.

High Altitude CompensatorHigh altitudes can cause a carburetor to run rich. The high altitude compensator is used to improve high altitude emissions & engine performance by leaning out the air flow mixture. Air flow is controlled by a valve activated by an aneroid attached to the rear of the carburetor main body.
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