Cleaning And Inspection; Installation - Mercury TDI 3.0L Operation And Maintenance Manual

4. Remove the anode assembly.

Cleaning and Inspection

Inspection and replacement interval will vary according to the condition of the seawater and the mode of engine operation.
NOTE: Use sandpaper, fiber brush, or cleaning pad, remove the deposits from the surface of the anode before trying to
determine the amount of erosion. Do not use a mild steel brush which might leave deposits that could accelerate corrosion.
1. Remove the deposits.
2. Inspect and measure the anode. Compare the measurements to the specifications for a new sacrificial anode and replace
the anode assembly when deteriorated 50%.
NOTE: Sacrificial anodes are available only as an assembly. Replace both the plug and anode as a unit.
a
Sacrificial anode measurements (new)
Length
Diameter
3. Discard the sealing washer.

Installation

1. Install a new sealing washer on the anode assembly.
a
90-8M0133568 JUNE 2017
eng
a
b
b
d
c
b
50843
a - Intercooler
b - Anode plug
c - Anode length 20 mm (0.79 in.)
c
54639
a -
e
b -
c -
d -
e -
50842
20.0 mm (0.79 in.)
9.9 mm (0.390 in.)
a - Anode assembly
b - Sealing washer
Section 4 - Maintenance
Anode plug
Sacrificial anode
Length
Diameter
Sealing washer
Page 51