Cleaning And Inspection - MerCruiser Sterndrive TDI 3.0L User Manual

Section 5 - Maintenance
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.
Sacrificial anode measurements (new)
Length
Diameter
3. Discard the sealing washer.
Page 76
a
c
b
50768
a - Intercooler
b - Anode plug
c - Anode length 20 mm (0.79 in.)
a - Anode plug
b - Sacrificial anode
c - Length
d - Diameter
e - Sealing washer
20.0 mm (0.79 in.)
9.9 mm (0.390 in.)
90-8M0070851 AUGUST 2012
eng