Fuel Rail Removal - Mercury Optimax 250 Manual

Fuel Rail Removal

NOTE: To provide improved access to the fuel rails, it is recommended that the expansion
chamber be removed as follows:
1. Remove coolant hose between air compressor and expansion chamber, and rail and
expansion chamber.
2. Remove 6 nuts securing expansion chamber and lay chamber off to one side.
a -
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.
b
a -
b -
c -
NOTE: Always remove fuel/air hose and fitting together by removing fitting retainer rather
cutting clamps.
90-888438 JUNE 2002
b
Coolant Hose
Fuel Pressure Port
Air Pressure Port
Fuel Injector
a
b
59412
b -
CAUTION
a
c
d - Harness Connector
e - Spring Clip
DIRECT FUEL INJECTION
a
59414
a
Nuts (6)
d
e
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