Volvo Penta 3.0 GS, Operator'S Manual

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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 protection
against galvanic (electrochemical) corrosion. These anodes are “sacrificial,” 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 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 elec-
tronic 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 corro-
sion 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 potential.
Audible alarm _______________________________________________________________
The audible alarm will alert you to unacceptable or dangerously low oil pressure and/or high water temperature levels.
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 system, exhaust system, electrical system, lubrication
system, 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
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 compo-
nents:
1. Fuel pump
2. Fuel filter
3. Fuel quality
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