Marine Engine Electrical System; Activation By Fuel Pressure - Westerbeke WPDS-20 Technical Manual

SECTION
Q
Q.2
MARINE ENGINE ELECTRICAL SYSTEM
ACTIVATION BY FUEL PRESSURE
(Push Button Start)
This system is supplied on all four and
six cylinder Westerbeke engines beginning
January 1975. Basically, the system is
very simple and eliminates the need for a
separate switch position to activate the
engine alarm system, when supplied.
Starting is accomplished by operation
of the start push button which causes the
starting motor to crank.
Once the engine is running, fuel pres-
sure developed in the low pressure side of
the fuel injection pump operates a fuel
pressure switch. Voltage is then applied
to the alarm system (if supplied) and to
the alternator for excitation and for all
instruments.
When the engine is stopped, fuel pres-
sure drops and the fuel pressure switch
removes voltage from these devices.
When an engine is supplied with a pre-
heating device, the device is energized by
a separate push button.
NOTE: It is important that your engine
installation includes fuses or circuit
breakers, as described under "Ownership
Responsibility" on the wiring diagram
supplied with your engine.