Sacrificial Anodes; Replacing Anodes (Sx-A/Dps-A) - Volvo 5.0OSiE-J Operator's Manual

Sacrificial Anodes

On the SX-A/DPS-A drives, sacrificial anodes are attached to the bottom of the gimbal housing and at the rear of
the gearcase above the anti-ventilation plate. On the XDP-B drive, sacrificial anodes are attached as follows: one
anode is located just in front of the front propeller (inside the propeller housing), a second is located on the bearing
housing cover (just under the drive unit cover), and a third is located on the trim cylinder.
Anodes are slowly eroded away by galvanic action and require inspection. Additionally, anodes that are subjected
to frequent wetting and drying require periodic scraping with sandpaper to remove scale and oxidation to maintain
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. Some after-market anodes may not meet mil-specs and are
larger in size. Using after-market sterndrive anodes may cause cavitation bubbles due to poor fit, which may lead
to propeller erosion. You may order the anodes separately, or as part of an accessories kit. (The accessories kit
also includes o-rings, oils, washers, seals, and bellows.)
Anode
Transom Shield
Sterndrive
Transom Shield Aluminum
Sterndrive Aluminum
Transom Shield Magnesium
Sterndrive Magnesium
VPA 7748131 English 09-2007
50391
50392
SX-A/DPS-A ANODE REPLACEMENT INFORMATION
Material Part No.
Zinc 3888817
Zinc 3888814
3888816
3888813
3888818
3888815

Replacing Anodes (SX-A/DPS-A)

The amount of erosion from the drive anode is a good
indication of the condition of the transom shield an-
ode.
1. Inspect anodes at each usage. If an anode is 2/3
its original size (1/3 eroded), replace it.
2. Remove the two screws holding the anodes onto
the gearcase (B) and/or the gimbal housing (A).
Discard screws.
3. Remove the old anode.
4. Attach new anode and secure with two new
screws (provided in kit).
5. Tighten screws to 14.8–20.7 ft. lb. (20–28 Nm).
If additional electronic or electrical equipment is in-
stalled, each item should have an individual anode or
grounding device and all grounding devices must be
interconnected. Follow equipment manufacturers rec-
ommendations.
NOTICE! Your Volvo Penta product has been shipped
with either Zinc or Aluminum anodes. The
table below provides replacement informa-
tion and also specifies which anodes
should be used, depending on water condi-
tions.
Water Condition Weight when new
Salt Water 2.55 lb (1.16 kg)
Salt Water 2.86 lb (1.30 kg)
Brackish Water 0.90 lb (0.41 kg)
Brackish Water 1.00 lb (0.45 kg)
Fresh Water 0.61 lb (0.28 kg)
Fresh Water 0.68 lb (0.31 kg)
Maintenance
Replace when anode
weighs less than:
1.79 lb (0.81 kg)
2.00 lb (0.91 kg)
0.63 lb (0.29 kg)
0.70 lb (0.32 kg)
0.43 lb (0.20 kg)
0.48 lb (0.22 kg)
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