Volvo Penta D2-75 - Manual (Page 52)

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Corrosion protection. Check
Check the sacrificial anode (1) on the drive and the
three sacrificial anodes (2) on the propeller. Replace
with a new anode if 50% of the material has perished
or at least once per season.
IMPORTANT! Use zinc sacrificial anodes for
salt water and magnesium anodes for freshwa-
ter.
Remedy any paintwork damage on the drive accord-
ing to the instruction in the chapter: Laying up /
Launching.
Replacing sacrificial anodes
1. Remove the propeller (see the next section).
2. Remove the sacrificial anodes. Thoroughly
scrape clean the mating surfaces on the drive
and propeller.
3. Apply thread sealant to the screws for the
sacrificial anodes on the propeller.
4. Install the new sacrificial anodes. Tighten the
anodes so that there is a good metal contact.
5. Reinstall the propeller.
The sacrificial anodes oxidise when they come into
contact with air. This reduces the galvanic protec-
tion. There may even be oxidisation on the surface
of a completely new anode. Always clean the sacri-
ficial anodes before launching the boat.
IMPORTANT! Use emery paper. Do not steel
tools when cleaning, as these may damage the
galvanic protection.
Folding propeller. Cleaning
The propeller must be cleaned and lubricated once a
year. Remove the propeller and clean all compo-
nents thoroughly. Apply waterproof grease to the
propeller blade teeth and bearing surfaces so that
the propeller folds easily. Also apply waterproof
grease to the studs, spacing sleeve (drive), propeller
shaft and hub.
WARNING! Prevent accidental starting. Rem-
ove the ignition key and turn off the power at
the main switch before working on the propeller.
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Maintenance: S drive and reverse gear
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