6-12
ELECTRICAL
switch to carry the heavy current
from the
battery
to the starter
motor.
The solenoid
is actuated
by turning
the
ignition
key to
the
START
position.
On some
models,
a
pushbutton
is used to actuate
the
solenoid.
See Section
6-11 for
detailed
service
pro-
cedures on the starter
motor circuit.
6-9
CHARGING
CIRCUIT SERVICE
The generator
has two terminals
on the
lower end.
One terminal
is larger
than the
other
and the wires connected
have differ-
ent
size
connectors
to
ensure
the
proper
wire is connected
to the correct
terminal.
If several electrical
accessories
are used
and the engine is operating
at idle speed, or
below
1500
rpm
for
extended
per iods
of
time, the battery
will not recieve
adequate
current
to remain in serviceable
condition.
The rated
capacity
of the
generator
is
10-amps.
Therefore,
the
electrical
acces-
sory
load
should
not
exceed
lO-amps
or
current
will be drawn from the battery
at a
greater
rate
than
the
generator
is able
to
produce.
Such
a
negative
draw
on the
battery
w
ill result
in a run-down
condition
and
failure
of the
battery
to provide
the
required
current
to the starter
for cranking
the engine.
To calculate
the
amperage
draw of an
accessory
the following simple formula
may
be
used:
Amps
equals
watts
divided
by
volts.
Amps
=
Watts
Volts
Front
view
of
a
Jolmson outboard with the generator
mounted
on
the port side.
The volts will always be 12. Accessories
will usually be given in watts.
If the obso-
lete
measurement
of candle power
is used,
then
one candle power is equal to approxi-
mately
one
watt.
Example:
A boat
has
running
lights
requiring
8-watts;
auxiliary
lights use 10 watts;
and a radio rated at 30-
watts.
Amps
=
48 Watts/12 volts
=
4 Amps.
In this case, if all the lights
are on and
the
radio
is being used, the
total
draw on
the battery
would be 4 amps.
If the engine
is running
at
1500 rpm or higher,
and the
generator
circuit
is performing
properly
by
charging
the
battery
with
10 amps, then a
net post ive gain of 6 amps is being recieved
by
the battery.
The battery
can be externally
charged or
the engine can be equipped with a generator
to charge
the
battery
while the
engine
is
operating.
A voltage
regulator,
mounted
in a junc-
tion box on the
rear of the engine,
is con-
nected
between
the generator
and the bat-
tery
to prevent
overcharging
of the battery
while the engine is operating.
The junction
box also houses a fuse to protect
the charg-
ing circuit.
The generator
circuit
requires
at least
1500 rpm engine speed to effectively
charge
the
battery.
At
this
speed,
the
ampere
meter
on the
dash w ill indicate
a positive
charge to the battery.
If the boat has a twin engine installation,
the usual practice
is to use only one battery
for cranking
both units.
With such a twin
installation,
only
one
engine
generator
should be used to charge
and maintain
the
battery
at its full ampereage
rating.
Most mechanics
have discovered
if both
generators
of a twin installation
are
con-
nected
to charge the battery,
one seems
to
"fight"
the
other.
Instead
of
having
an
improved
system,
this
type
of
hook-up
causes
many
serious
electrical
problems
that
are unexplainable.
See Section
6-9 for
detailed
service
procedures
on the generator
circuit.
TROUBLESHOOTING
One of three
areas
causing problems
in
the
generating
circuit
and
failure
of
the
system
to
provide
sufficient
current
to -
maintain
the
battery
as
a.
satisfactory
charge.
Remember,
the generator
will only
produce
approximately
10 amps of current.
Содержание 4906B 4HP 1969
Страница 5: ......
Страница 85: ...3 44 POWERHEAD EXHAUST COVER I LEVER Exploded drawing of a 5 5 hp powerhead 1956 60 principle parts identified...
Страница 87: ...3 46 POWERHEAD Exploded drawing of a 7 5 hp powerhead 1956 58 with principle parts identified...
Страница 88: ...CYLINDER BLOCK 3 47 HEAD GASKET RING...
Страница 89: ...3 48 POWERHEAD HEAD BYPASS COVER Exploded drawing of a 10 hp powerhead 1956 63 with principle parts identified...
Страница 90: ...CYLINDER BLOCK 3 49 THERMOSTAT EXHAUST COVER The...
Страница 137: ...4 46 FUEL LEVER AND LOW SPEED...
Страница 153: ...4 62 FUEL Exploded view of a pressure tyoe fuel tank with major parts identified...
Страница 157: ...4 66 fUEL...
Страница 177: ...5 18 IGNITION FLYWHEEL Exploded drawing of a typical magneto system Only one coil and set of points is shown...
Страница 271: ...8 12 LOWER UNIT PROPELLER Exploded drawing of the Weedless lower unit gear case with major parts identified...
Страница 285: ...8 26 LOWER UNIT Exploded drawing of a lower unit with a window for access to the shift connector...
Страница 412: ...A 16 APPENDIX Wire Identification 33 hp with Generator 1965 67...
Страница 413: ...APPENDIX A 17 o C...
Страница 414: ...Wire Identification 33 hp with Generator 1969 70...
Страница 415: ...APPENDIX A 19 Wire Identification 35 hp 1957 59...
Страница 416: ...A 20 APPENDIX Wire Identification 40 hp Standard Shift with Generator 1960 66...
Страница 417: ...APPENDIX A 21 UJ cc b Wire Identification 40 hp Standard Shift with Generator 1967 68...
Страница 418: ...A 22 APPENDIX ee I U Vl Z Z o U I I Wire Identification 40 hp Standard Shift With Generator 1969 10...
Страница 419: ...APPENDIX Wire Identification 40 hp Electric Shift with Generator 1961 66 A 23...
Страница 420: ...A 24 APPENDIX C 00 Wire Identification 40 hp Electric Shift with Generator 1967 68...
Страница 421: ...Wire Identification 40 hp Electric Shift with Generator 1969 70...
Страница 422: ...NOTES NUMBERS...