Spark Plug Inspection And Replacement - Mercury Optimax User Manual

Spark Plug Inspection And Replacement

Damaged spark plug boots may emit sparks which 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 such as pliers,
screwdriver, etc. to remove the 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.
Spark Plug
Spark plug gap
MAINTENANCE
WARNING
!
0.80 mm (0.030 in.)
71
26899
26946
26947