PERIODIC MAINTENANCE 2-7
SPARK PLUG
• Disconnect the spark plug cap 1 and remove the spark plug
2.
CARBON DEPOSITS
Check carbon deposits on the spark plug.
• If carbon is deposited, remove it using a spark plug cleaner
machine or carefully use a tool with a pointed end.
SPARK PLUG GAP
Measure the spark plug gap with a thickness gauge.
• Adjust the spark plug gap if necessary.
Spark plug gap:
Standard: 0.6 – 0.7 mm (0.024 – 0.028 in)
09900-20803: Thickness gauge
ELECTRODE’S CONDITION
Check the condition of the electrode.
If it is extremely worn or burnt, replace the spark plug.
• Replace the spark plug if it has a broken insulator, damaged
thread, etc.
Inspect every 6 months.
Replace every 18 months.
Standard Cold type
NGK CR6HSA CR7HSA
DENSO U20FSR-U U22FSR-U
0.6 – 0.7 mm
(0.024 – 0.028 in)
Confirm the thread size and reach when replacing the
plug. If the reach is too short, carbon will be deposited
on the screw portion of the plug hole and engine dam-
age may result.
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