2-8 PERIODIC MAINTENANCE
Gap
SPARK PLUG
• Inspect every 100 hours (6 months).
• Replace every 200 hours (12 months).
Standard spark plug : NGK BKR6E
CARBON DEPOSIT
Inspect for a carbon deposit on spark plug bases.
If carbon is present, remove it with a spark plug cleaning ma-
chine or by carefully using a pointed tool.
SPARK PLUG GAP
Using thickness gauge, measure for spark plug gap.
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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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.
" Spark plug : 28 N
.
m (2.8 kg-m, 20.0 lb.-ft.)
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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.
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