Mercury Optimax 150 User Manual

DIRECT FUEL INJECTION
90-855347R1 JANUARY 1999 Page 3B-33
Fuel Rail Removal
CAUTION
Fuel system must be bled off prior to removal of fuel system components.
NOTE: Use Fuel/Air Pressure Gauge 91-16850--1 or 91-852087A1/A2 to de-pressurize
air hose first and then fuel hose.
1. De-pressurize fuel system.
2. Remove fuel injector harness from each injector by compressing spring clip with flat
tip screw driver while pulling on connector.
c
b
a
56118
c
d
e
a
a
f
g
b
b
a-Port Fuel Rail
b-Air Pressure Port
c-Spring Clip
d-Fuel Injector
e-Harness Connector
f-Fuel Pressure Port
g-Starboard Fuel Rail
NOTE: Always remove fuel/air hose and fitting together by removing fitting retainer rather
cutting clamps.
3. Remove fuel inlet hose, fuel outlet hose and air hose from fuel rail.
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c
d
e
f
c
a
b
a
b
c
Top Fuel Rail Connections Bottom Fuel Rail Connections
a-Air Hose
b-Retainer
c-Allen Screws (remove)
d-Air Hose
e-Fuel Hose
f-Allen Screws

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)