Fuel Tank Sender - Mercury MerCruiser MCM 454 Mag MPI Service Manual

INSTRUMENTATION
3. Replace sender if ohmmeter readings are other than as shown for each temperature.
INSTALLATION
1. Apply Loctite Pipe Sealant with Teflon to threads of temperature sender.
2. Install sender in thermostat housing and tighten securely.
3. Connect tan wire and coat with Liquid Neoprene.
4. Refill closed cooling system with approved coolant as outlined in SECTION 6B.

Fuel Tank Sender

FLANGE TYPE
Testing
1. Disconnect wire from terminal on sending unit and ground wire from sending unit
mounting screw.
2. Remove sending unit from fuel tank.
3. Connect ohmmeter between sending unit terminal and sending unit housing.
Index
Page 4D-12
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Water Temperature
140 F (60 C)
194 F (90 C)
212 F (100 C)
b
a - Water Temperature Sender
b - Thermostat Housing
SERVICE MANUAL NUMBER 23
Ohms Reading
121-147
47-55
36-41
a
90-861326--1 MARCH 1999