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Electrical System
6.12 Bonding System
Your boat is equipped with a bonding system that
interconnects the underwater metal hardware
and the engines to ensure that they are of the
same electrical potential. Sacricial anodes of
the size and type recommended by the engine
manufacturer are attached to the outboard motor.
There is also an anode on the transom and could
be anodes on each trim tab blade controller. The
trim tab anodes are isolated from the boat bond-
ing system to protect each tab plane assembly if
the boat is to kept in saltwater.
Anodes deteriorate before other metals, thereby
protecting the underwater metals from galvanic
corrosion or stray electrical current. Since anodes
are sacricial, it is important to monitor them and
replace them when they have deteriorated to 50
- 75% of their original size.
The bonding system is connected to the engine
and battery DC ground. The earth ground wire
for the battery charger and AC electrical system is
also connected to the bonding system. It provides
a path to the safety earth ground in the event of
a fault in the shore earth ground connection.
Typical Bonding Wires & Connections
Transom Sacricial Anode
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