Spark Plug Inspection And Replacement - Mercury 150 Manual

8. Flo-Torq II Drive Hub Propellers - Install forward thrust hub, replaceable drive sleeve, propeller,
thrust hub, propeller nut retainer and propeller nut onto the shaft.
a - Propeller nut
b - Propeller nut retainer
c - Rear thrust hub
9. Place a block of wood between gearcase and propeller and torque propeller nut to specifications.
Description
Propeller nut
10. Secure propeller nut by bending three of the tabs into the thrust hub grooves.

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.
MAINTENANCE
c
b
a
!
e
d
d - Propeller
e - Replaceable drive sleeve
f - Forward thrust hub
Nm
75
ob00422
WARNING
ob00375
41
f
ob00421
lb. in. lb. ft.
55