Spark Plug Inspection And Replacement - Mercury 2.5 Operation And Installation Manual

The anode requires periodic inspection especially in saltwater which will
accelerate the erosion. To maintain this corrosion protection, always replace
the anode before it is completely eroded. Never paint or apply a protective
coating on the anode as this will reduce effectiveness of the anode.

Spark Plug Inspection And Replacement

Damaged spark plug boots may emit sparks that can ignite fuel vapors under
the engine cowl, resulting in serious injury or death from a fire or explosion.
To avoid damaging the spark plug boots, do not use any sharp object or
metal tool to remove the spark plug boots.
1. Open the spark plug access door.
2. Remove the spark plug boot. Twist the rubber boots slightly and pull off.
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