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MARINE ENGINE ELECTRICAL SYSTEM
ACTIVATION BY KEYSWITCH
Turning the ignition switch ON activates the instrument panel.
(The
oil and water temperature gauges will zero, the voltmeter will indi-
cate battery voltage and the hourmeter will start to record time.
The
alarm
buzzer
should
sound.
The
e1ectr ic
fuel
pump will
star t
to
operate.
Pushing
the
key will
activate
the preheat circuit.
This closes a
solenoid on the engine with an audible click and supplies 12 volts to
the engine glow plugs.
Preheat as needed for weather conditions.
A
noticeable voltage drop will indicate on the voltmeter when the pre-
heat circuit is activated.
Continuing
to preheat,
turn
the
key to START.
This energizes the
starter and turns the engine over.
Once the engine starts release the
keyswitch.
It should spring back to the ON position and pop out of
the preheat position.
The voltmeter shu1d indicate a charge from the alternator 13.5 - 14.5
vol ts.
The oil pressure and the alarm buzzer should shut off.
Oil
pressure opens the oil pressure switch in the alarm circuit shutting
off the alarm.
The water temperature switch operates the opposite.
It closes when an overheat condition exists and
the operating tem-
perature of
the engine reaches
205·
F and
sounds
the alarm.
The
tachometer will reg ister eng ine speed as it takes impulses from the
alternator
as
it
charges.
If
the
alternator
does
not
produce
a
charge, the tachometer will not operate.
The hourmeter will continue
to record time.
The hourmeter is on a separate 12 volt circuit.
The circuit is protected by a circuit breaker located on the engine.
Any time excessive current flows, the circuit breaker will trip.
This
is a manual reset breaker which must be reset before the engine will
operate electrically again.
CAUTION:
The builder/owner must ensure that
the instrument panel,
wiring and engine are installed so that electrical devices cannot come
in contact with sea water.
The latest
information regarding your eng ine' s electr ical system is
included on the wiring diagram shipped with the engine.
Be sure to
study this wiring diagram and all notes thereon.
GLOW PLUG
A glow plug is provided in each combustion chamber in order to
ensure smooth engine starting during the cold weather.
The tip of the glow plug glows red hot when energized on preheat.
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