A spark plug is a device for delivering electric current from an ignition system to the combustion chamber of a spark-ignition engine to ignite the compressed fuel/air mixture by an electric spark, while containing combustion pressure within the engine.
Testimonial: "Hi thanks i understand how it works ,just looking for the gap ?"
A "gap" is a space so I believe it's the space between the metal hook-looking section on the bottom and the vertically protruding contact thing directly below it.
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If you're replacing the spark plugs in your car
engine, you'll need to set the gap before reseating the
spark plug. The gap is the distance electricity arcs between the ground
electrode and center electrode. The gap must be set correctly to ensure
maximum performance. Here's how to set the gap of a spark plug.
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