Gear Housing Installation - Mercury 25 EFI Service Manual

Gear Housing
3. Secure anode/trim tab to the gear housing with the screw. Torque the screw to specification.
a
d
Description
Anode/trim tab attaching screw
Water pickup/strainer screw

Gear Housing Installation

Accidental starting can cause serious injury. Before removing or installing the gear housing, disconnect and isolate the spark
plug leads. Disable the ignition system by removing the keys from the ignition (if equipped) and engaging the lanyard stop
switch to prevent the engine from starting.
1. Remove and isolate the spark plug leads from the spark plugs.
2. Tilt the outboard to the full up position.
3. Place the shift handle (tiller models) or shift lever (remote control models) into forward.
4. Place the gear housing into forward gear by lifting up on the lower shift shaft until the shift shaft stops its upward
movement. Lightly push down on the lower shift shaft until resistance is felt.
5. Coat the splines of the driveshaft with 2‑4‑C with PTFE.
Installing the gear housing to the powerhead without adequately cleaning the top of the driveshaft can result in severe
product damage. Any lubricant trapped in the space between the driveshaft and the crankshaft prevent the two from properly
engaging. Always clean the top of the driveshaft before installing the gear housing.
6. Guide the gear housing into the driveshaft housing aligning the water tube in the driveshaft housing with the water tube
grommet in the water pump cover.
7. Install the gearcase retaining screws, washers and nut. Tighten the screws, and the nut to the specified torque.
a
Page 6A-42
a - Anode
b
b - Anode Screw
c - Water pickup/strainer
d - Water pickup/strainer screw
c
17096
WARNING
!
NOTICE
b
21059
© 2016 Mercury Marine
Nm
6
a - Screws and washers (two each side)
b - Nut and washer
90-8M0105568 eng MARCH 2016
lb. in. lb. ft.
53
Drive tight