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Maintenance. Seawater system
Zinc anodes. Check/change
WARNING! Risk of water entry. Close the sea
cock before doing any work on the seawater
system.
1. Close the sea cock.
2. Open the drain tap (1) on the reverse gear oil
cooler, and the tap (2) on the heat exchanger,
and drain off the seawater.
3. Remove the zinc anodes (Z) in the heat exchang-
er (2 pcs.) and in the reverse gear oil cooler (2
pcs).
4. Check the zinc anodes and replace them if more
than 50% of their original size has been used up.
If not, clean the zinc anodes with emery cloth to
remove the oxide layer before re-installing them.
IMPORTANT! Use an emery cloth for clean-
ing. Do not use steel tools, since this could
impair the galvanic protection.
5. Install the zinc anodes. Make sure that good me-
tallic contact is obtained between the anode and
the casting.
6. Close the drain taps (1 and 2).
7. Open the sea cock before starting the engine.
8. Check that no leakage occurs.
1
Z
Z
Z
Z
Z
2
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