Spark Plug: Testing and Inspection

SPARK PLUGS INSPECTION

1. DISCONNECT HIGH-TENSION CORDS FROM SPARK PLUGS





2. REMOVE SPARK PLUGS
Using a 16 mm plug wrench. remove the spark plug.

Torque: 20 N.m (200 kgf.cm, 14 ft.lbf)





3. CLEAN SPARK PLUGS
Using a spark plug cleaner or wire brush, clean the spark plug.

Air pressure:
Below 588 kPa (6 kgf/sq.cm, 85 psi)
Duration: 20 seconds or less





4. VISUALLY INSPECT SPARK PLUGS
Check the spark plug for electrode wear, threads damage and insulator damage.
If abnormal, replace the plugs.

Recommended spark plugs:
ND: KI6R-U
NGK: BKR5EYA





5. ADJUST ELECTRODE GAP
Carefully bend the outer electrode to obtain the correct electrode gap.

Correct electrode gap: 0.8 mm (0.031 in.)

6. RECONNECT HIGH-TENSION CORDS TO SPARK PLUGS