Volvo Penta D3-110i-A, Operator'S Manual

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Drive SX, DP-S
Your drive is protected against galvanic corrosion. This protection consists of two-three layers of paint, sacrificial
anodes and ground braids. The ground braids maintain a connection between the different components of the
drive. A broken connection can result in the rapid corrosion of an individual component even though the protection
is otherwise effective. Check ground braids every year. Faulty electrical installation can also cause the break
down of the galvanic protection. Damage due to electrolytic corrosion occurs rapidly and is often extensive. For
further information see the chapter: “Electrical system”.
IMPORTANT! Always repair damage to paintwork immediately. Improperly applied paint or the wrong type of
paint on the keel can put the corrosion protection system out of action. For further information on painting
see the chapter: Laying up and launching
Sacrificial anodes. Checking
1. Check the sacrificial anodes at the front edge of
the drive (1) and under the shield (2) every 14
days.
2. Replace with new anodes when approximately
30% of the anode has been eroded.
Note that
most stainless steel propellers (accessories) use
the sacrificial anodes faster than normal.
IMPORTANT! Tighten the new anodes so that
there is a good metallic contact is retained.
IMPORTANT! Use zinc sacrificial anodes for salt
water and magnesium anodes for freshwater.
The sacrificial anodes oxidize in contact with air, which
diminishes the galvanized protection. Even a new an-
ode can be oxidized on the surface.
Therefore always
clean the sacrificial anodes before launching the
boat.
IMPORTANT! Use emery paper. Do not use a wire
brush or other steel tools when cleaning, as
these may damage the galvanic protection.
Ground braids. Check
The ground braids join the drive and shield separate
components at a common ground point on the engine.
Check that the ground braids are not broken and have
good contact.