2-6 PERIODIC MAINTENANCE
SPARK PLUGS
REMOVAL
• Disconnect the spark plug caps.
• Remove the spark plugs.
09930-10121: Spark plug wrench set
HEAT RANGE
• Check spark plug heat range by observing electrode color. If
the electrode of the spark plug is wet appearing or dark color,
replace the spark plug with hotter type one. If it is white or
glazed appearing, replace the spark plug with colder type
one.
CARBON DEPOSITS
• Check carbon deposits on the spark plug.
• If carbon is deposited, remove it using a spark plug cleaner
machine.
SPARK PLUG GAP
• Measure the spark plug gap
A
with a thickness gauge.
• Adjust the spark plug gap if necessary.
Spark plug gap:
Standard: 0.7 – 0.8 mm (0.028 – 0.031 in)
09900-20803: Thickness gauge
Inspect every 5 000 km (3 000 miles, 15 months).
Replace every 10 000 km (6 000 miles, 30 months).
Hot type
Standard
Cold type
NGK
CR6E
CR7E
CR8E
ND
U20ESR-N
U22ESR-N
U24ESR-N