Knock Sensor - MerCruiser 305 CID (5.0L) Service Manual

SUPPLEMENT TO SERVICE MANUAL NUMBER 24

Knock Sensor

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.
IMPORTANT: Ensure that the knock sensor is installed in the upper location on the
Y-fitting.
1. Install knock sensor in engine block. Torque to 14 lb-ft (19 Nm).
2. Connect electrical connector to knock sensor.
90-861327000 JULY 2000
a -

Knock Sensor

b - Harness Connector
a - Knock Sensor
FUEL INJECTION DISASSEMBLY AND REASSEMBLY
a
b
a
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73756
Page 5E-37