Fuel Rail Disassembly - Mercury Optimax 115 Service Manual

DIRECT FUEL INJECTION
NOTE: It is recommended that direct injectors remain in the cylinder head (if they are not
to be replaced) while removing the fuel rail. The direct injectors have a teflon seal which
may expand if the injector is removed from the head. This expansion may cause rein-
stallation difficulty or require the replacement of the seal.
4. Remove 2 nuts securing fuel rail.
5. As fuel rail is removed, use a flat tip screw driver to hold direct injectors in cylinder
head.
a -
b -

Fuel Rail Disassembly

The starboard fuel rail contains 3 fuel injectors and a tracker valve.
The port fuel rail contains 3 fuel injectors, 1 fuel fuel regulator and 1 air regulator.
NOTE: Each fuel/air inlet or outlet hose adaptor has 2 O-ring seals. These O-rings should
be inspected for cuts or abrasions and replaced as required when fuel rail is disassembled
for cleaning.
a -
b -
c -
Page 3B-34
a
a
Fuel Rail
Direct Injectors
e
a
a
a a
f
Fuel Injector
Fuel Regulator
Air Regulator
b
b
b
b
56121
a
a
a a
d
d
b
b
a
a
c
c
a
a
56122
e
f
d - Tracker Valve
e - Fuel/Air Inlet (hidden)
f - Fuel/Air Outlet
90-855347R1 JANUARY 1999