Technical data

MANUAL STARTER DISCONNECT (TOGGLE SWITCHES)
GENERAL:
This manually controlled series of Westerbeke marine diesel generators is equipped with toggle
switches on the engine control panel and, optionally, at remote panels. The following instructions and
methods of correcting minor problems apply only to such toggle switch controls.
All three switches are momentary contact type and serve the following functions:
1. Preheat: The PREHEAT/DEFEAT toggle switch is a double pole, single throw switch. The
switch serves two purposes: preheating the engine for easy starting and defeating or bypassing the
engine protective oil pressure switch. The defeat function turns on the fuel solenoid, instrument
power and alternator excitation.
2. The START/DEFEAT toggle switch is a double pole, single throw switch. The switch also serves
two purposes: starting the engine and defeating or bypassing the oil pressure switch. The latter
pole serves the same function as in the preheat switch.
3. Stop: The STOP toggle switch is a single pole, single throw, normally closed switch. This switch
provides power to the fuel solenoid, instrument cluster and alternator excitation, after the oil
pressure switch has closed upon starting. Opening of this switch opens the power circuit to the
fuel solenoid, thus stopping the flow of fuel to the engine and stopping the engine.
ENGINE OPERATION:
1. Preheat: Depress the PREHEAT switch. The voltmeter, panel lights, gauges and meters and fuel
solenoid will activate. The PREHEAT switch should be depressed for twenty seconds in
conjunction with thermostats (installed in intake manifold) and forty to sixty seconds in
conjunction with glow-plugs.
2. Start: While still depressing the PREHEAT switch, depress the START switch. This will engage
the start solenoid. Panel power and the fuel solenoid will be activated. Upon engine firing, release
the start switch. Do not release the PREHEAT switch until oil pressure reaches 15 psi. Then as
long as the high water temperature and low oil pressure protective circuit does not activate, the set
will remain energized and continue to run.
3. Stop: Depress the STOP switch to stop the engine. This opens the power feed to the fuel solenoid,
stopping the fuel flow to the engine. It must be depressed until the generator stops rotating..