Sacrificial Anodes
50391a
50392a
Sacrificial anodes are attached to the bottom of the
gimbal housing A and at the rear of the sterndrive,
above the anti-ventilation plate B.
Anodes are slowly eroded away by galvanic action and
require inspection. Additionally, anodes that are sub-
jected to frequent wetting and drying require periodic
scraping with sandpaper to remove scale and oxida-
tion to maintain their effectiveness. Do not paint ano-
des, 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. Some after-market anodes may not meet
mil-specs.
Inspecting Drive Anodes
The amount of erosion from the drive anode is a good
indication of the condition of the transom shield anode.
Inspect anodes (see Maintenance Schedule for fre-
quency). If an anode is 2/3 its original size
(1/3 eroded), replace it.
If additional electronic or electrical equipment is instal-
led, each item should have an individual anode or
grounding device and all grounding devices must be
interconnected. Follow equipment manufacturers rec-
ommendations.
Anode Replacement Information
NOTICE! Your Volvo Penta product has been shipped with Aluminum anodes. The table below provides replace-
ment information and also specifies which anodes should be used, depending on water conditions.
Anode Material Part No. Water Condition
Transom Shield Zinc 3888817 Salty
Sterndrive Zinc 3888814 Salty
Transom Shield Aluminum 3888816 Brackish
Sterndrive Aluminum 3888813 Brackish
Transom Shield Magnesium 3888818 Fresh
Sterndrive Magnesium 3888815 Fresh
Maintenance
90 47700385 05-2009
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