Mercury Sea Pro - Spark Plug Inspection and Replacement

MAINTENANCE
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b
c
a
d
f
e
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a - Propeller nut
b - Propeller nut retainer
c - Rear thrust hub
d - Propeller
e - Replaceable drive sleeve
f - Forward thrust hub
9. Place a block of wood between gearcase and propeller and torque propeller nut to specifications.
Description Nm lb. in. lb. ft.
Propeller nut 75 55
10. Secure propeller nut by bending tabs up and against the flats on the propeller nut.
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11. Reinstall spark plug leads.
Spark Plug Inspection And Replacement
!
WARNING
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 boots. Twist the rubber boots slightly and pull off.
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2. Remove the spark plugs to inspect. Replace spark plug if electrode is worn or the insulator is rough, cracked,
broken, blistered or fouled.