Air Temperature Sensor Removal; Air Temperature Sensor Installation; Throttle Plate Assembly Removal; Throttle Plate Assembly Installation - Mercury Optimax 250 Manual

DIRECT FUEL INJECTION

Air Temperature Sensor Removal

Disconnect sensor harness and unscrew sensor.
a -
b -

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 -
b -

Throttle Plate Assembly Installation

Secure throttle plate assembly to air plenum with 4 bolts. Torque bolts to 65 lb. in. (7.3
Nm).
Page 3B-26
a
b
Air Temperature Sensor Harness Connector
Air Temperature Sensor
b
a
Bolts
Throttle Plate Assembly
57793
a
57793
90-888438 JUNE 2002