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Anodes (“sacrificial” anodes)
The XDP, anodes are located on the upper housing, trim cyl-
inder and at the base of the propeller shaft. An additional
anode is located in the heat exchanger.
Anodes are slowly eroded away by galvanic action and re-
quire inspection. Additionally, anodes subjected to frequent
wetting and drying require periodic scraping with coarse emery
cloth or sandpaper to remove scale and oxidation to main-
tain their effectiveness. Do not paint anodes, as this will
destroy their effectiveness.
When you need to purchase new anodes, see your Volvo
Penta
dealer. The material composition of Volvo Penta anodes meets
U.S. Military Specification 18001-H. If you use other anodes,
make sure they have equivalent specifications or galvanic cor-
rosion protection will be lost.
You may order the anodes separately.
Replacing sacrificial anodes (1)
1. Inspect anodes every 14 days, or more frequently if used
in extremely salty water. If an anode is 2/3 its original
size (1/3 eroded), replace it.
NOTE!
If you use stainless steel propellers, additional
sacrificial anodes may be required to handle the added
corrosion potential.
2. Remove the screw holding the anodes onto the gearcase.
Set the screws aside, as you will use them again.
3. Pull off the old anode.
4. Insert the new anode.
5. Secure with screw.
6. Tighten screw to 60 – 84 in. lb. (6.8 – 9.5 Nm) for the
gearcase anode
If additional electronic or electrical equipment is installed,
each item should have an individual anode or grounding de-
vice and all grounding devices must be interconnected. Fol-
low equipment manufacturer’s recommendations.
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