Mercury Optimax 150 User Manual

DIRECT FUEL INJECTION
Page 3B-26 90-855347R1 JANUARY 1999
Air Temperature Sensor Installation
Secure sensor in air plenum with 3 screws. Drive screws tight.
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.
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a
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a-Bolts
b-Throttle Plate Assembly
Throttle Plate Assembly Installation
Secure throttle plate assembly to air plenum with 4 bolts. Torque bolts to 100 lb. in. (11.5
Nm).
Vapor Separator Disassembly
1. Remove 7 screws securing separator cover and remove cover.
2. Inspect seal in fuel pump chamber of separator tank for cuts and abrasions. Replace
seal if necessary. If seal is serviceable, apply 2-4-C w/Teflon Marine Lubricant
(92-825407A12) to seal lips.
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57342
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57343
a-Screws (7 each)
b-Seal

Mercury Optimax 150 Specifications

General

Horsepower	150 HP
Engine Type	V6
Alternator Output	60 amp / 756 watt
Starting	Electric
Steering	Remote
Displacement	2.5 L
Fuel Induction System	2-Stage Direct Fuel Injection (DFI)
Shaft Length	20", 25"
Dry Weight	431 lbs (20 in), 439 lbs (25 in)