Water Temperature Switch / Sender - Mercury MerCruiser D2.8L D-Tronic Service Manual

SERVICE MANUAL NUMBER 22

Water Temperature Switch / Sender

When the engine is COLD the audio warning circuit is normally open.
REMOVAL
1. Drain the closed cooling system.
2. Remove harness wiring from temperature switch / sender located behind the electrical
box bracket and accessible through a hole in the bracket, as shown.
3. Counter-hold the adaptor with a separate wrench.
4. Remove the sender and sealing washer.
Typical
90-860074--1 FEBRUARY 2002
a - Harness Wiring
b - Water Temperature Switch / Sender
c - Sealing Washer
b
c
a
INSTRUMENTATION
75298
Page 4D-21