The Plate - Evinrude 4906B 4HP 1969 Owner's Manual

6-1 INTRODUCTION
The battery, gauges and horns, charging
system, and the cranking
considered subsystems of the electrical
tem. Each of these units or subsystems will
be covered in detail in this chapter begin-
ning with the battery.
All engines covered in this manual use
the magneto ignition system and a battery is
not required to operate the engine.
the larger horsepower units use a cranking
motor for starting and the battery
used to supply power for this motor.
The starting circuit consists of a crank-
ing motor and a starter-engaging
nism. A solenoid is used as a heavy-duty
switch to carry the heavy current from the
battery to the starter
is actuated by turning the ignition key to
the START position.
pushbutton is used to actuate the solenoid.
These engines are also equipped with a
hand starter for use when the electric start-
er motor system is inoperative.
6-2 BATTERIES
The battery is one of the most important
parts of the electrical
to providing electrical
engine, it also provides power for operation
of the the running lights, radio, electrical
accessories, and possibly the pump for a bait
tank.
Because of its job and the consequences,
(failure to perform
best advice is to purchase
brand, with an extended
from a reputable dealer.
The usual warranty
replacement policy, which means you would
be entitled to a consideration
left on the warranty period if the battery
should prove defective before its time.
ELECTRICAL
system are all
sys-
Most of
is only
mecha-
motor. The solenoid
On some models, a
system. In addition
power to start the
in an emergency) the
a well-known
warranty period,
covers a prorated
for the time
6
Do not consider a battery
70-ampere hour capacity.
how large your boat requires, make a liberal
estimate and then purchase the one with the
next higher ampere rating.
MARINE BATTERIES
Because marine batteries
perform under much more rigorous condi-
tions than automotive
constructed much differently
used in automobiles or trucks.
marine battery should always be the No. 1
unit for the boat and other types of batter-
ies used only in an emergency.
Marine batteries
exterior case to
pounding and shocks imposed on it as the
boat moves through
extremely tight turns.
The plates in marine batteries
er than in automotive
A fUlly charged battery,
with electrolyte, is the heart
Engine starting and efficient
obtained if the battery is below
of less than
If in doubt as to
are required to
batteries, they are
than those
Therefore, a
have a much heavier
withstand the violent
rough water and in
are thick-
batteries and each
filled to the proper level
of
the ignition system.
performance can never be
fully charged rating.
a