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Home >> Mazda >> 1972 >> R100 Not Available Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> MAZDA 1971-72 Rotary Engine Modification >> Operation >> Ignition & Air Flow Control System >> Vacuum Switch
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Vacuum Switch

Switch is connected to vacuum advance control rod and is mounted inside the leading plug distributor. When energized, the vacuum switch sends a signal to the control box which in turn ignites the trailing spark plug.

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