Spark Plug: Adjustment

Correct it if the spark plug gap is measured with a gap gauge, and it is necessary.

Spark plug gap: L

1.0 - 1.1 mm (0.039 - 0.043 in)

Fig 1: Identifying Spark Plug Gap

Courtesy of SUBARU OF AMERICA, INC.

NOTE: Replace with new spark plug if this area is worn to "ball" (A) shape.