Drive. Sx And Dp-S - Volvo Penta 3.0GS/SX Owner's Manual

Drive. SX and DP-S

A
C
A
B
62
B
C
Corrosion protection
Anodes
Sacrificial anodes are attached to the bottom of the
gimbal housing (A), at the front (B) of the gearcase
above the anti-ventilation plate. SX-C models also
have anodes in the exhaust passage (C). Anodes are
slowly eroded away by galvanic action and require in-
spection. Anodes subjected to frequent wetting and
drying require periodic scraping to remove scale and
oxidation to maintain their effectiveness. Magnesium
anodes are to be installed if the boat is to be used
mainly in a fresh water enviroment.
Checking corrosion protection
Inspect gimbal housing and front gearcase anodes (A
and B) every 14 days, or more frequently if used in
extremely salty water. If an anode is 2/3 its original
size (1/3 eroded), it should be replaced. If a stainless
steel propeller is used, additional sacrificial anodes
may be required to handle the added corrosion potenti-
al.
SX-C drive: Inspect anode (C) in the exhaust pas-
sage once a season or every 100 hours; replace if
necessary. Remove two short and one long TORX
screws.
Tighten the new anode so that there is a good electri-
cal contact.
Where boats are kept laid up on land when not in use
there is a lower level of galvanic corrosion protection
due to the oxidation on the sacrificial anodes. Even a
new anode will be oxidised on the surface. If less
than 1/3 of the anode is corroded the oxidation layer
on the sacrificial anode should be rubbed down with
emery cloth before launching the boat. Never use a
wire brush or other steel tool.
IMPORTANT! Use emery paper. Do not use a
wire brush or other steel tools when cleaning, as
these may damage the galvanic protection.
Drives with stainless steel propellers (accessory) con-
sume anodes faster. Check that the ground braids
are not broken and have good contact.