Spark Plug Inspection And Replacement - Mercury jet 20 Manual

• Lubricate the throttle and shift cable moving components and pivot locations.

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.
3. Set the spark plug gap to specifications.
MAINTENANCE
WARNING
!
45
ob01420
ob00375
ob01092
ob00424