Knock Sensor (Ks) - Mercury MerCruiser MCM 454 Mag MPI Service Manual

MULTI-PORT FUEL INJECTION DISASSEMBLY AND REASSEMBLY

Knock Sensor (KS)

REMOVAL
1. Disconnect electrical connector at knock sensor located just ahead of starter motor.
2. Remove knock sensor from engine block.
CLEANING AND INSPECTION
1. Clean knock sensor with a dry cloth, paying special attention to threads on base.
2. Inspect surfaces of knock sensor for signs of wear or physical damage.
INSTALLATION
IMPORTANT: If installing a new knock sensor, be sure to replace it with an identical
part. Knock sensors are very sensitive and designed for each specific application.
IMPORTANT: In the following step, it is very important that the knock sensor be
torqued to the precise specification. Incorrect torquing will result in unsatisfactory
performance. DO NOT use sealer on threads.
1. Install knock sensor in engine block. Torque to 12-16 lb-ft (16.3-21.7 Nm).
2. Connect electrical connector to knock sensor.
Index
Page 5C-32
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Refer to "Precautions" in this section, BEFORE proceeding.
a - Knock Sensor
a - Knock Sensor
NOTICE
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a
SERVICE MANUAL NUMBER 23
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90-861326--1 MARCH 1999