Figure 13: Oil Pressure Switch And Transducer; Figure 14: Exhaust Temperature Switch - Westerbeke 15.0 MEG-60Hz Operator's Manual

4 Startup and Basic Operation
4.8.2 Oil Pressure Switch and Transducer
An oil pressure switch is located on the right side of the oil
filter assembly.
This is a normally open contact switch. It functions with the
time relay circuit to ensure DC voltage to the fuel pump
circuit is terminated when the unit shuts down.
An oil pressure transducer, on the side of the engine block,
sends DC voltage to the ECU that it interprets as oil pressure.
Should this voltage fall below a certain level, the ECU will shut
the generator down and illuminate the low oil pressure LED. If
this occurs, see 6.2 Engine Troubleshooting.
4.8.3 Exhaust Temperature Switch
A normally closed temperature switch is mounted on the exhaust elbow to monitor the temperature of the
exhaust coolant and gases. Should the switch sense an excessive exhaust temperature, the ECU will shut the
generator down and the exhaust temperature LED will illuminate on the control panel.
4.8.4 Coolant Temperature Sensor
This sensor is located on the underside of the intake manifold to monitor the engine coolant temperature. The
sensor sends DC voltage to the ECU that interprets this reading as engine coolant temperature. Should the
temperature reach an overheat threshold, the ECU will shut the engine down and will illuminate the engine
temperature fault LED light on the control panel.
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Figure 13: Oil Pressure Switch and Transducer

Figure 14: Exhaust Temperature Switch

Figure 15: Coolant Temperature Sensor
Operator Manual for Gasoline Generators