Spark Plug Inspection And Replacement - Mercury 300XS OptiMax User Manual

This model has three corrosion control anodes—two above and
one below the anti-ventilation plate. A fourth anode is located on
the bottom of the clamp/swivel bracket assembly.
a
a - Corrosion control anodes (three on gearcase)
b - Corrosion control anode (one on clamp/swivel bracket)
All anodes require periodic inspection, especially in salt water
(refer to the Inspection and Maintenance Schedule). Replace
any anodes before they are 50% corroded. Never paint or apply
protective coating on the anode, as effectiveness of the anode will
be reduced.

Spark Plug Inspection and Replacement

Avoid serious injury or death from fire or explosion caused by
damaged spark plug boots. Damaged spark plug boots can emit
sparks. Sparks can ignite fuel vapors under the engine cowl. To
avoid damaging spark plug boots, do not use any sharp object
or metal tool such as pliers, screwdriver, etc. to remove spark
plug boots.
MAINTENANCE
b
WARNING
!
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