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Mercury OptiMax 250 - Operation Instructions

Mercury OptiMax 250
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DIRECT FUEL INJECTION
Page 3B-26
90-888438 JUNE 2002
Air Temperature Sensor Removal
Disconnect sensor harness and unscrew sensor.
57793
a
b
a-Air Temperature Sensor Harness Connector
b-Air Temperature Sensor
Air Temperature Sensor Installation
Screw sensor into air plenum. Reconnect sensor harness.
Throttle Plate Assembly Removal
NOTE: The throttle plate assembly is calibrated and preset for proper running character-
istics and emissions at the factory. Other than complete assembly removal from the air
plenum, no further disassembly should be made.
Remove 4 bolts securing throttle plate assembly to air plenum and remove assembly.
a
a
b
57793
a-Bolts
b-Throttle Plate Assembly
Throttle Plate Assembly Installation
Secure throttle plate assembly to air plenum with 4 bolts. Torque bolts to 65 lb. in. (7.3
Nm).

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