Drive - Volvo Penta KAD32 Instruction Book

Drive

Your drive is protected against galvanic corrosion. This protection consists of five layers of paint, sacrificial an-
odes 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 this type of 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.
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Corrosion protection. Checking/
Replacing
Check the sacrificial anodes regularly. Replace with
new anodes when approximately 1/3 of the anode has
been eroded. Tighten the new anode so that there is a
good electrical 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 can be oxidized on the surface. Before
launching the sacrificial anodes must be cleaned/
ground using an emery cloth.
IMPORTANT! Use emery paper. Do not use a
wire brush or other steel tools when cleaning, as
these may damage the galvanic protection.
Your drive is equipped with sacrificial anodes of zinc
as standard, intended for use with salt water. On
drives used mainly in freshwater the sacrificial an-
odes should be of magnesium.
IMPORTANT! Use zinc sacrificial anodes for
salt water and magnesium anodes for fresh-
water.
DP drive
The sacrificial anodes can be found at the lower edge
of the shield (2) and on the gear housing in front of
the propellers (1).
Remove the propellers. Undo the two screws holding
the anode (1). Remove the anode. Scrape mating sur-
face on the drive clean. Install new anode.