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B. Electrical Wiring Maintenance
Periodically, inspect all wiring for nicks, chaffing, brittle-
ness, improper support, etc. Check all AC and DC wir-
ing connections to be sure they are secure and free of
corrosion. Spraying the receptacles and electrical con-
nections with an electrical connection cleaner will reduce
corrosion and improve electri cal continuity.
DO NOT allow corrosion to build up on con nec-
tions. Shorts or ground faults can result.
Depending on the model, the entire AC circuitry,
especially the shore power cable, should be season-
ally tested for proper continuity by an experienced
marine electri cian. This will help detect any short,
open wire, or ground fault.
120VAC & 240VAC (230VAC-export)
power can be danger ous. DO NOT attempt to
service a system unless you are familiar with, and
expe rienced in, perform ing such service.
Periodically, inspect the exterior jacket of your shore
power cable for nicks or cuts. For Cablemaster users,
experience has shown that when only a short section
of the power cable is used regularly, the cable may
be subject to sharper than normal coiling. This in turn
causes undue "kinking" of the cable. To relieve this
condition, routinely pay the cable out completely and
stretch it on any smooth surface. Allow the Cable-
master to then retract the cable into the cable stor-
age area. Check the neoprene covers on the in-limit
switch and power switch to be sure they are free of
cracks or fracture. If your shore power cable is dirty
DO NOT USE any cleaner that will leave a waxy film
on the shore power cable. The waxy film will cause
slippage between the Cablemaster's main pulley and
your shore power cable. It is recommended to use a
mild soap and water to clean your cable.
Electrical Systems - Section H
H - 13 STRAY CURRENT CORROSION
A. General
Electrically induced underwater corrosion occa sionally
affects boats and their related compo nents. This is
referred to as "Stray Current Corro s ion" and appears
as surface pitting or deteri oration. Stray current
corrosion is the de composi tion of chemi cal com-
pounds by electric current.
Stray current corrosion can be caused by sur rounding
boats; an improp erly wired battery/char ger instal la tion
or other boats that are in close proximity which have
electrical power leakages. Stern drive units are
especially vulnerable to stray current corrosion.
Periodi cally in spect the engine compo nents to deter-
mine if corrosion damage exists. If stray current corro-
sion damage is found, determine and correct the cause
of the stray current to prevent further damage. Con sult
an experi enced marine electrician or contact your Four
Winns dealer for assistance.
electrical
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 electri cian review any battery
charger installation to ensure a stray cur rent corrosion
problem will not devel op. An improper battery connec-
tion is a com mon cause of stray cu rrent corrosion.
Use only UL Marine-ignition protected battery
charger(s) designed to meet US Coast Guard
regulations for external ignition protection.
Corrosion is usually more prevalent in polluted or salt
water than in fresh water. It is also more likely to occur
when dock age is in an area with steel piers, large
metal boats, or where shore power is in use.
B. Galvanic Corrosion
Galvanic corrosion results from a potential electri cal
difference existing between dissimilar metals im-
mersed in a conductive solu tion (e.g., salt or brackish
water). If these metals touch or are otherwise electri-
cally connected, this potential difference produces an
electron flow between them. The attack on the more
active metal is usually in creased and the attack on the
less active metal is decreased, as compared to when
these metals are not touching.
NOTICE
Owner's Manual Page 100
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