Volvo Penta D4 Operator's Manual page 93

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7748934 04-2008
Drive
The drive is protected against galvanic corrosion by
several layers of paint, sacrificial anodes and ground
braids. The ground braids maintain a connection
between the different components of the drive. A bro-
ken 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 elec-
trolytic corrosion occurs rapidly and is often extensive.
For further information see the chapter Mainte-
nance page 82.
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 section
Storage page 101.
Oil level, checking and topping up
IMPORTANT!
Never over-fill the drive. The oil level must always be
within the recommended range.
1 Trim up the drive to 35°. Remove the cover (1) and
the plug (2).
2 The oil level must always reach the oil filler cap (3)
upper part.
3 If the oil level is low, fill oil through the oil filler cap
upper part. For oil grade and quantity refer to the
Sterndrive chapter.
4 Tighten the plug and installed cover.
The oil must have a golden brown nuance. If the oil is
gray, water has entered the stern drive. In this case let
a Volvo Penta workshop carry out checks on the stern
drive.
Maintenance
91