2-8 PERIODIC MAINTENANCE
SPARK PLUG
Standard spark plug: NGK BKR6E
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REMOVAL
• Disconnect ignition coil connector, then remove the bolt
securing the ignition coil.
• Remove the ignition coil and spark plug.
CARBON DEPOSIT
Inspect for a carbon deposit on spark plug base.
If carbon is present, remove it with a spark plug cleaning
machine or by carefully using a pointed tool.
SPARK PLUG GAP
Measure spark plug gap with a thickness gauge.
Adjust to within specified range if gap is out of specification.
Spark plug gap: 0.7 – 0.8 mm (0.028 – 0.031 in)
! 09900-20803: Thickness gauge
CONDITION OF ELECTRODE
Inspect electrode for a worn or burnt condition.
If it is extremely worn or burnt, replace spark plug.
Also, be sure to replace spark plug if it has a broken insulator,
damaged thread, etc.
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• Inspect every 100 hours (6 months).
• Replace every 200 hours (12 months).
Only resistor (R) type spark plugs must be used with
this engine. Using a non-resistor spark plug will cause
ignition and fuel injection system malfunctions.
Confirm the thread size and reach when replacing the
plug. If the reach is too short, carbon will be deposited
on the threaded portion of the plug hole resulting in
possible engine damage.
Gap
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