Spark Plug Cleaning and Adjustment

CLEANING AND ADJUSTMENT
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.

Fig.51 Setting Spark Plug Gap - Typical:

Adjust spark plug gap with a gap gauging tool.