Anodes ("Sacrificial"); Audible Alarm; Engine Systems - Volvo Penta 3.0GL-B Operator's Manual

Features

Anodes ("sacrificial")

Electrochemical corrosion of met-
al can cause very serious and ex-
pensive damage to drives, propel-
lers, propeller shafts, rudders,
keels, and other equipment fitted
to your boat. To protect your in-
vestment, Volvo Penta sterndrive
units are equipped with zinc an-
odes to provide protection against
galvanic (electrochemical) corro-
sion. These anodes are "sacrifi-
cial," or designed to erode away faster than the metal on the
transom shield and sterndrive. (For sterndrives used only in
fresh water a magnesium anode should be used.)
Use only genuine Volvo Penta zinc and magnesium an-
odes. Some aftermarket anodes may not meet mil-specs and
are larger in size. Using aftermarket sterndrive anodes may
cause cavitation bubbles due to poor fit, which may lead to pro-
peller erosion. When you must replace the anodes, see your
Volvo Penta dealer, since if additional electronic or electrical
equipment is installed, each must have an individual anode or
grounding device, and all grounding devices must be intercon-
nected.
NOTE! If you have a stainless steel propeller, you may
need additional sacrificial anodes or a Volvo
Penta active corrosion protection system to
handle the added corrosion potential. Your
Volvo Penta dealer will help you to decide
which is more appropriate for your boat.
NOTE! Boats that connect to an AC power source
(shore power) will require protection against
both galvanic and "stray current" corrosion.
For the added protection needed, a galvanic
isolator may be installed in the grounding, or
green, wire between the boat and the shore
power outlet on the dock. The isolator will
block DC flow, but will permit the passage of
AC flow. If you are connected to an AC power
source that is not equipped with a galvanic
isolator, you may need additional sacrificial
anodes to handle the added corrosion poten-
tial.
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Audible alarm

The audible alarm will alert you to unacceptable or dangerous-
ly low oil pressure, high water temperature levels and or high
exhaust manifold temperatures should the incoming water flow
become interrupted.
WARNING!
The audible alarm is capable of producing a warning
sound up to 120 decibels. Prolonged exposure to this
audible alarm can cause hearing loss.

Engine systems

Important engine systems include the cooling system, fuel sys-
tem, exhaust system, electrical system, lubrication system,
and steering system.
Cooling system
The cooling system keeps the internal engine temperature be-
low the boiling point of engine coolant. You will need to take
care of these cooling system components:
1. Raw water pump and impeller
2. Circulation pump belt (may also be involved with other en-
gine systems)
3. Hoses and clamps
4. Heat exchanger (if installed)
Fuel system
The fuel system stores fuel for the engine, pumps gasoline
through the fuel lines to the carburetor or fuel injectors, and
mixes fuel with air and sends the fuel-air mixture to the engine.
You will need to take care of these fuel system components:
1. Fuel pump
2. Fuel filter
3. Fuel quality
Exhaust system
The exhaust system passes the exhaust gases from the burnt
fuel-air mixture through exhaust hoses to and out the drive.
You will need to take care of these exhaust system compo-
nents:
1. Hoses and clamps
2. Exhaust manifold
3. Exhaust riser
4. Exhaust manifold overheat sensors
7741591 / 2003-12