Intake Air Temperature (Iat) Sensor - Mercury MerCruiser MCM 454 Mag MPI Service Manual

SERVICE MANUAL NUMBER 23
INSTALLATION
1. Install TP sensor on throttle body using screws with lock washers and Loctite 242 ap-
2. Install throttle body, throttle cable and flame arrestor as outlined in "Throttle Body."
3. When negative (–) battery cable has been reconnected, start engine and check the TP

Intake Air Temperature (IAT) Sensor

REMOVAL
1. Remove flame arrestor, throttle linkage, throttle body and plenum as outlined in
2. Remove IAT sensor from plenum.
CLEANING AND INSPECTION
1. Clean the surfaces of the IAT sensor with a dry cloth.
2. Inspect the IAT sensor for signs of wear or damage.
Index
90-861326--1 MARCH 1999
Downloaded from https://needmanual.com/
plied to threads. Torque screws to 20 lb. in (2 Nm).
a - Throttle Body
b - Throttle Position (TP) Sensor
c - Screws With Lockwashers
d - O-Ring
sensor output voltage. It should be approximately .7 Volts at idle and 4.5 Volts at W.O.T.
"Plenum."
a - Plenum
b - Intake Air Temperature (IAT) Sensor
MULTI-PORT FUEL INJECTION DISASSEMBLY AND REASSEMBLY
a
d
b
c
a
b
72800
72802
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