Powerhead Reassembly - Mercury 25 EFI Service Manual

Cylinder Block/Crankcase
2. Install a new anode to the flange screw. Secure the anode with a screw. Tighten the anode screw to the specified torque.
a
b
Description
Anode screw
3. Install a new O‑ring onto the flange screw.
4. Lubricate the O‑ring with 10W‑30 4‑Stroke Marine Engine Oil and install the flange screw onto the cylinder block.
Tube Ref No.
10W-30 4-Stroke Marine
110
Engine Oil
5. Tighten the thermostat cover bolts and the anode flange screw to the specified torque.
Description
Thermostat cover bolts (2)
Anode flange screw

Powerhead Reassembly

1. Install the cylinder head.Refer to Section 4B ‑ Cylinder Head Installation.
2. Coat the oil pressure switch threads with Loctite 567 PST Pipe Sealant.
Page 4A-24
c
d
57328
Description
a - Thermostat cover bolts (2)
b - Anode cover bolts (2)
a
b
11735
© 2016 Mercury Marine
a - Flange screw
b - O‑ring
c - Anode
d - Screw
Where Used
Flange screw O-ring
Nm lb‑in.
6 53
Part No.
92-8M0078625
Nm lb. in.
6 53
6 53
90-8M0105568 eng MARCH 2016
lb‑ft
–
lb. ft.