Installation; Gearcase Lubrication; Draining And Inspecting Gear Housing Lubricant - Mercury 15 EFI FourStroke Service Manual

Maintenance

Installation

1. Apply Extreme Grease or 2‑4‑C with PTFE to the propeller shaft.
Tube Ref No.
Extreme Grease
2-4-C with PTFE
95
2. Install the front thrust hub onto the shaft so that the larger diameter end is facing the propeller.
3. Install the propeller, rear thrust washer, and propeller nut onto the shaft.
4. Place a block of wood between the gearcase and the propeller to prevent rotation, and tighten the propeller nut to the
specified torque.
Description
Propeller nut
NOTE: If the propeller nut does not align with the propeller shaft hole after tightening, tighten the nut further to align with
the hole.
5. Align the propeller nut with the propeller shaft hole. Insert a new cotter pin in the hole and bend the ends.
a

Gearcase Lubrication

Draining and Inspecting Gear Housing Lubricant

Rotating propellers can cause serious injury or death. Never operate the boat out of the water with a propeller installed.
Before installing or removing a propeller, place the drive unit in neutral and engage the lanyard stop switch to prevent the
engine from starting. Place a block of wood between the propeller blade and the anti‑ventilation plate.
Page 1B-14
Description
b
c
© 2018 Mercury Marine
31927
Where Used
Propeller shaft
Propeller shaft
a -
d
b -
c -
d -
31926
WARNING
!
92-802859A 1
Nm lb‑in.
12 106
Cotter pin
Propeller nut
Rear thrust washer
Front thrust hub ‑ Larger diameter end
towards propeller
90-8M0125265 eng NOVEMBER 2017
Part No.
8M0071842
lb‑ft
–