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MAINTENANCE
Spark Plugs
Spark Plug Recommendations
A new engine can cause
temporary spark plug
fouling due to the
preservative added during
the assembly process. Avoid
prolonged idle speeds,
which cause plug fouling
and carbonization.
Change the spark plugs at
the intervals outlined in the
Periodic Maintenance Table
beginning on page 88.
• Use the recommended spark plugs with the proper gap. Refer to the
specifications section beginning on page 142.
• Use only resistor-type spark plugs.
• Torque spark plugs to 18-22 ft-lbs (24-30 Nm).
• Always carry spare spark plugs.
NOTICE: Using non-recommended spark plugs can result in serious engine
damage. A spark plug with a heat range too high will always cause
engine damage if the engine is operated in conditions more severe
than intended for that plug.
Spark Plugs