Fuel Rail Pressure Damper; Wire Color Code Abbreviations; Fuel Injector Wiring Diagram - Mercury MerCruiser Service Manual

Fuel Rail Pressure Damper

Two fuel rail pressure dampers are located on the fuel rail assembly. They are designed to reduce fuel pressure changes
caused by pulses generated by the fuel injectors opening and closing. The fuel rail pressure damper contains a spring on the
dry side of the diaphragm. This spring positions the diaphragm against the diaphragm seat when the engine is not running and
there is no fuel pressure present.
NOTE: The fuel rail pressure dampers are replaced with the fuel rail as a assembly.

Wire Color Code Abbreviations

BLK
BRN
GRN
PNK
RED
WHT
LT or LIT

Fuel Injector Wiring Diagram

H
4 2
H
G
1 F
E
D
C
B
A
A
3
4
1 - PCM connector A
2 - Injector 6
3 - Injector 8
4 - Injector 4
5 - Injector 3
6 - Injector 2
7 - Injector 1
8 - Injector 7
9 - Injector 5
10 - Engine fuses
11 - From main power relay terminal 87
90-8M0099748 eng DECEMBER 2015
Wire Color Abbreviations
Black
Brown
Green
Pink
Red
White
Light
A1
PNK/ LT GRN
B1
PNK/WHT
C1
D1 PNK/RED
PNK/BLU
E1
PNK/YEL
F1
G1
H1
A2
B2
C2
H
D2
E2
G
F2
G2
F
H2
E
A3
B3
D
C3
C
D3
B E3
PNK/BRN
F3
A
G3
1
H3
A4
B4
1
C4
D4
E4
PNK/ORN
F4
G4
H4
BLU
GRY or GRA
ORN or ORG
PPL or PUR
TAN
YEL
DK or DRK
5
3
2
4
2 1 2 1 2 1 2 1
© 2016 Mercury Marine
MPI ECT Fuel System
6 7
9
8
2 1 2 1 2 1 2 1
Blue
Gray
Orange
Purple
Tan
Yellow
Dark
10
A B C D E F G H
11
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