The spark plug gap is the distance between the center electrode and the ground electrode of the spark plug. It is an important factor in determining the strength of the spark and the efficiency of the engine. If the gap is too small, the spark will be too weak to ignite the fuel mixture. If the gap is too large, the spark will be too strong and can damage the engine.
To set the spark plug gap, use a feeler gauge. Insert the feeler gauge between the center electrode and the ground electrode, and adjust the gap until it matches the specified value.
