Spark Plug: Testing and Inspection

INSPECT SPARK PLUG

NOTE:
- Do not clean the spark plug with a wire brush.
- Do not adjust the gap of the used spark plug.

a. Clean the spark plug.







1. Using a spark plug cleaner, clean the spark plug.

HINT:
- If the electrode is wet, dry it first, then clean it with a spark plug cleaner.
- If the spark plug is wet with oil, remove the oil with gasoline before using a spark plug cleaner.




b. Check the appearance.

Recommendes Spark Plug:

1. Check that the threads or insulator of the spark plug are not damaged.




c. Inspect the gap.
Using a spark plug gap gauge, measure the gap of the spark plug.

Standard: 1.0 to 1.1 mm (0.039 to 0.043 in.)
Maximum: 1.2 mm (0.047 in.)

If the gap is greater than maximum, replace the spark plug.