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8.3 Spark plug maintenance
Recommended spark plugs: TORCH F6RTC, NGK BPR6ES, CHAMPION
RN9YC
1. Remove the cap of spark plug, pulling it out.
2. With a spark plug wrench unscrew and remove the spark plug from the engine
(turn it counter clockwise).
SPARK PLUG WRENCH
CAP OF SPARK PLUG
3. Visually check the spark plug. If the spark plug
insulation is cracked or chipped, replace it with a
ELECTRODE
new one. To clean dirt on the electrode, use a very
thin wire brush.
4. Check the electrode distance with a calliper. The
distance should be between 0.6 and 0.8mm. If it
does not match, adjust it carefully.
5. Carefully put back the spark plug, starting its
threading manually to avoid the damage of the
thread. With the spark plug fully threaded make a
final tightening with a spark plug wrench, according
to the following recommendations:
New spark plugs: 1/2 turn
Used spark plugs: 1/8 to 1/ 4 turn
6. Put back the cap of the spark plug.
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