Spark Plug Inspection And Replacement - Mercury 25 Jet 4-Stroke Manual

The second anode is on the water intake housing and the third
anode is installed on the transom brackets.
a - Water intake housing anode
b - Transom bracket anode

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.
1. Remove the spark plug leads. Twist the rubber boots slightly
and pull off.
2. Remove the spark plugs to inspect. Replace spark plug if
electrode is worn or the insulator is rough, cracked, broken,
blistered or fouled.
MAINTENANCE
a
WARNING
!
24838
ob00375
ob00423
82
10239
b