Evinrude 4906B 4HP 1969 Owner's Manual page 191

6-2 ELECTRICAL
plate is securely anchored within the bat-
tery case to ensure extended life.
The caps of marine batteries
proof" to prevent acid from spilling into the
bilges when the boat heels to one side in a
tight turn, or is moving through rough wa-
ter.
Because of these features,
battery will recover
condition and give satisfactory
a much longer period of time than any type
of automotive-type
BATIERY CONSTRUCTION
A battery consists of a number of pos-
itive and negative
solution of diluted sulfuric acid. The plates
contain dissimilar active materials
kept apart by separators.
grouped into what are termed
Plate straps on top of each element connect
all of the positive plates
negative plates into groups.
divided into cells which hold a number of
the elements apart from the others.
entire arrangement
hard-rubber case.
cover and contains the filler caps for each
cell. The terminal posts protrude through
the top where the battery
the boat are made.
connected to its neighbor
negative manner with a heavy strap called
the cell connector.
be
The battery MUST
well-ventilated area. It must
no
manner that absolutely
direction under the most violent actions of the boat.
are "spill
the marine
from a low charge
service over
unit.
plates immersed in a
and are
The plates are
elements.
and all of the
The battery is
The
is contained within a
The top is a one-piece
connections
Each of the cells is
in a positive-to-
located near the engine
be in
secured such
is
movement possible in any
BATTERY
Two ratings are used to classify batter-
ies: one is a20-hour
other is a cold rating at OOF. This second
figure indicates the cranking load capacitv
and is referred to as the Peak Wa.tt Rating
of a battery.
has been developed to measure
cranking ability of the battery.
cal rating is embossed on each battery case
at the base and is determined
the maximum current by the maximum vol t-
age.
The ampere-hour
its capacity
amperes over a per ioe' of time at a cell
voltage of 1.5. Therefore, a battery with a
capaci ty of maintaining
hours at 1.5 volts would be classified as a
60-ampere hour battery.
Do not confuse the ampere-hour
with the PWR, because they are two un-
related figures used for e'ifferent purposes.
A replacement
power rating equal or as close to the old
unit as possible.
BA TIERY
Every battery installed in a boat must be
secured in a well-protected
If the battery
for
hydrogen
charging could become very explosive if the
gas is concentrated
of its size, weight, and acid content,
battery must be well-secured.
tery should break loose during rough boat
maneuvers,
done, including damage to the hull.
BATTERY
The battery
and a definite maintenance
sure extended life.
test satisfactorily,
properly, one of four problems could be the
cause.
1- An accessory
been left on overnight or for a long period
during the day.
resul t in a discharged battery.
in a
2- Slow speed engine operation for long
a
periods of time resulting in an undercharged
condition.
RATINGS
rating at 80°F and the
This Peak Watt Rating (PWR)
rating of a battery
to furnish a given amount of
3 amperes for 20
battery should have a
LOCATION
vent ilatec' area.
area is not well ventilated,
gas which is given off
and confined.
considerable damage could be
SERVICE
requires periodic ser
program to en-
If the battery
but still fails to perform
might have accidently
Such an oversight would
the cold-
The numeri-
multiplying
by
is
rating
during
Because
the
If the bat-
vicrnz
should
.