LARSON Bass - Electrical System; Batteries

GENERAL CARE AND MAINTENANCE
SECTION
10
© 2003-2018 Ken Cook Co. 10 - 2 l Bass
Tightening a fitting or clamp may correct a fuel leak. If the leak continues, however,
replace the line, fitting or hose immediately to prevent a build-up of fluids or gases.
Use fuel system parts certified for marine use only. Never use automotive parts in
marine applications.
ELECTRICAL SYSTEM
Before performing any work on the electrical system or the battery, review Safety in
Section 2.
BATTERIES
Electrical Shock Hazard: Always disconnect the
batteries before performing maintenance on the DC electrical system.
Electrical shock may occur if the batteries are not disconnected during
maintenance on the DC electrical system.
Personal Injury Hazard: Always wear gloves and
protective eyewear when working on and around the batteries. The batteries
contain an acid called electrolyte. Avoid causing damage that could spill
electrolyte into the bilge when servicing the batteries. Avoid getting salt water
in or on the battery. Either condition can create a poisonous gas that is
harmful if inhaled. Always disconnect the batteries before cleaning.
Personal Injury Hazard: Never allow a tool to bridge
across the battery terminals. Injury can result if the terminals are accidentally
bridged with a tool or other conductor.
Today’s boats can be loaded with electronics that all run off the boat’s battery.
Because of this, many boats will have two or more batteries: one for starting and
running the engine, and one for electronics, commonly referred to as the house
battery. One advantage is that the starting battery will not be drawn down when
using electronics with the engine off, such as with a stereo. Another advantage is if
the starting battery has lost capacity because of age, the battery switch has a 1+2
(Both) position that parallels both batteries for emergency starting. See the Blower
Switch section of this manual for more information.
Marine batteries generally come in two types: starting and deep-cycle. Starting
batteries are similar to car batteries, can supply lots of current for a short period of
time and are used for starting the engine. Starting batteries should be recharged
almost immediately and do not tolerate deep discharges. Deep-cycle batteries are
designed for repeated discharging and recharging cycles without damage. They are
used as the house battery on boats with higher DC power requirements.