Water Temperature - Primary Station - Mercury MerCruiser D2.8L D-Tronic Service Manual

SERVICE MANUAL NUMBER 22

Water Temperature - Primary Station

REMOVAL
1. Drain the closed cooling system.
2. Remove harness wiring from temperature switch located behind the electrical box
bracket and accessible through a hole in the bracket, as shown.
Typical
3. Counter-hold the adaptor with a separate wrench.
4. Remove the sender and sealing washer.
TESTING
IMPORTANT: Use the following test to determine the accuracy of the Water Tempera-
ture Sender gauge circuit. If gauge indicates NO temperature when running engine
refer to the SECTION 1C - Troubleshooting.
Read WARNING about switch and sender testing in Precautions at front of this section
before proceeding with tests.
90-860074--1 FEBRUARY 2002
a - Harness Wiring
b - Water Temperature Sender
c - Sealing Washer
b
c
a
NOTICE
INSTRUMENTATION
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Page 4D-13