What is the gap of a spark plug?

1 Answers
LondonAnn
07/30/25 7:52am
The gap of a spark plug ranges between 0.6mm and 1.3mm. The spark plug gap refers to the distance between the center electrode and the ground electrode. A larger spark plug gap produces a longer arc during ignition, which makes it easier to ignite the air-fuel mixture in the cylinder, resulting in greater kinetic energy. However, since a larger gap requires a higher voltage to break down the air during ignition, different engines are matched with spark plugs of varying gaps. Choosing the correct spark plug gap ensures optimal engine performance. The size of the spark plug gap significantly impacts the vehicle, and the requirements for the gap vary depending on the engine model, driving habits, and road conditions.
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