Engine Coolant Temperature (Ect) Sensor - Mercury MerCruiser MCM 454 Mag MPI Service Manual

MULTI-PORT FUEL INJECTION DISASSEMBLY AND REASSEMBLY

Engine Coolant Temperature (ECT) Sensor

REMOVAL
NOTE: Handle the ECT carefully, as any damage to it will affect operation of the system.
1. Disconnect electrical connector at Engine Coolant Temperature (ECT) sensor.
2. Remove ECT from thermostat housing.
CLEANING AND INSPECTION
1. Clean with a dry cloth, removing any excess sealant from the base threads.
2. Inspect for evidence of physical damage to base or connector surfaces of the ECT.
INSTALLATION
1. Install ECT sensor in thermostat housing. TIGHTEN HAND TIGHT PLUS 2-1/2 TURNS
MAXIMUM.
2. Connect electrical connector to ECT sensor.
Index
Page 5C-26
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Refer to "Precautions" in this section, BEFORE proceeding.
b
a - Thermostat Housing
b - Engine Coolant Temperature (ECT) Sensor
b
a - Thermostat Housing
b - Engine Coolant Temperature (ECT) Sensor
NOTICE
a
a
SERVICE MANUAL NUMBER 23
72799
72799
90-861326--1 MARCH 1999