H - 7 STRAY CURRENT CORROSION
Wires on positive (+) side of battery that go to
starter. This wire is non-protected.
Electrically induced underwater corrosion occasionally
affects boats and their related components. This is re-
ferred to as “Stray Current Corrosion” and appears as
surface pitting or deterioration. Stray current corrosion
is the decomposition of chemical compounds by electric
50 amp protected wire that runs from the
engine to the fuse panel at the helm.
Wire from starter switch to starter solenoid.
Power lead to bilge blower from a fuse or
Stray current corrosion can be caused by the polarity of
the dockside wiring system of the boat being reversed
from the power source (reversed polarity) or surround-
ing boats, an improperly wired battery installation, other
leakages, or any other source close to the boat that has
electrical power leakage into the water. Stern drive units
are especially vulnerable to stray current corrosion.
Sensor wire from tachometer sender to
Leads to bilge pump from switch.
Leads to auto bilge pump.
Wire between ignition switch and coil. Wire
from ignition switch through distribution
panel to electrical instruments.
Periodically inspect the drive components and thru-hull
fittings to determine if stray current corrosion damage
exists. If corrosion damage is found, determine and cor-
rect the cause of stray current to prevent further dam-
age. Consult an experienced marine electrician or con-
tact your Four Winns dealer for assistance.
Wire from switch to instrument lights.
Sensor wire from engine oil pressure sender
to oil pressure gauge.
Sensor wire from water temperature sender to
water temperature gauge.
The use of some shore power battery chargers, while
the boat is in the water and the battery is connected to
the system, can cause stray current corrosion. Have an
experienced marine electrician review any battery
charger installation to ensure a stray current corrosion
problem will not develop. An improper battery connec-
tion is a common cause of stray current corrosion.
Sensor wire from fuel tank level sender to fuel
ers. Consult your Four Winns dealer for his rec-
Corrosion is usually more prevalent in polluted or salt
water than in clean water. It is also more likely to occur
when dockage is in an area with steel piers, large metal
boats, or where shore power is in use.
Wiring Color Code
Note: Some of these colors can serve more than one
type of circuit.
Sundowner™ Owner’s Manual
|Categories||Four Winns Manuals, Four Winns Sundowner Manuals, Outboard Marine Corporation Manuals|
|Tags||Four Winns Sundowner 205, Four Winns Sundowner 225, Four Winns Sundowner 245, Four Winns Sundowner 285|
|Model Year||2003, 2004, 2005, 2006, 2007, 2008|
|Document Type||Owner's Manual|
|Product Brand||Boats and Cruisers, Four Winns. For support contact your dealer at http://www.fourwinns.com/locate-dealer.aspx|
|Document File Type|
|Wikipedia's Page||Outboard Marine Corporation|
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