Spark Plug Inspection And Replacement - Mercury 4 FourStroke Manual

8. Place a block of wood between gearcase and propeller and
tighten the propeller nut. Secure propeller nut to the shaft
with a cotter pin.
a
b
c
d

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 to remove
the spark plug boots.
1. Remove the spark plug boot. Twist the rubber boot slightly
and pull off.
eng
MAINTENANCE
e
27094
WARNING
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75
a - Cotter pin
b - Propeller nut
c - Rear thrust hub
d - Propeller
e - Front thrust washer
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