88 TP-7044 6/23
3.9.7 Anticorrosion Zinc Anode
The heat exchanger contains an anticorrosion zinc anode (plug) to prevent electrolytic corrosion by seawater. See Figure 44.
Figure 44 Anticorrosion Zinc Anode Location
Check and replace the anticorrosion zinc anode at intervals recommended in the service schedule. Depending upon operating
conditions and seawater properties, the anticorrosion zinc anode may require more frequent replacement. See the Service Views
section for the location and use the following procedure.
Anticorrosion Zinc Anode Replacement
1. Press the generator set OFF/RESET button to shut down the generator set.
2. Disconnect the power to the battery charger, if equipped.
3. Disconnect the generator set engine starting battery, negative (-) lead first.
4. With the generator set cooled, close the seacock, open the petcock on the engine, and drain the coolant into a suitable
container.
5. Remove the anticorrosion zinc anode (plug) from the heat exchanger.
6. Use a wire brush to remove the loose corrosion on the anticorrosion zinc anode. Replace the anode according to Figure
45 and Figure 46.
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