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Anodes ("sacrificial")
Electrochemical corrosion of metal can cause
very serious and expensive damage to drives,
propellers, propeller shafts, rudders, keels, and
other equipment fitted to your boat. To protect
your investment, Volvo Penta sterndrive units
are equipped with zinc anodes to provide pro-
tection against galvanic (electrochemical) cor-
rosion. These anodes are "sacrificial," or de-
signed to erode away faster than the metal on
the transom shield and sterndrive.
Use only genuine Volvo Penta zinc and
magnesium anodes. 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 propeller 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 interconnected.
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 in-
stalled 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 potential.
Audible alarm
The audible alarm will alert you to unacceptable or danger-
ously low oil pressure and/or high water temperature lev-
els.
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.
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Engine systems
Important engine systems include the cooling system, fuel
system, exhaust system, electrical system, lubrication sys-
tem, and steering system.
Cooling system
The cooling system keeps the internal engine temperature
below the boiling point of engine coolant. You will need to
take care of these cooling system components:
1. Raw water pump and impeller
2. Belts (may also be involved with other engine systems)
3. Hoses and clamps
4. Heat exchanger (standard on Fresh Water Cooling Sys-
tem models)
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 en-
gine. You will need to take care of these fuel system compo-
nents:
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
components:
1. Hoses and clamps
2. Exhaust manifold
3. Exhaust riser
Electrical system
The electrical system generates, stores, and regulates the
flow of electricity needed to start the engine, fire the fuel-air
mixture to run the engine, and operate any electrical acces-
sories on your boat. You will need to take care of these
electrical system components:
1. Battery and connections
2. Circuit breakers and fuses
3. Distributor cap and rotors
4. Spark plugs
Electronic Fuel Injection (EFI)
Your Volvo Penta engine features an Electronic Fuel Injec-
tion (EFI) system that uses a microprocessor (ECM) to con-
trol idle air flow, fuel, and ignition.
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