Cleaning And Adjustment

Fig 1: Locating Spark Plug Gap Gauging Tool & Spark Plug - Typical

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

The plugs may be cleaned using commercially available spark plug cleaning equipment. After cleaning, file center electrode flat with a small point file or jewelers file before adjusting gap.

CAUTION: Never use a motorized wire wheel brush to clean spark plugs. Metallic deposits will remain on spark plug insulator and will cause plug misfire.

Adjust spark plug gap with a gap gauging tool (1).