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
Wire Color Abbreviations
BLK Black
BLU Blue
BRN Brown GRY or GRA Gray
GRN Green ORN or ORG Orange
PNK Pink PPL or PUR Purple
RED Red TAN Tan
WHT White YEL Yellow
LT or LIT Light DK or DRK Dark
Fuel Injector Wiring Diagram
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
A
B
C
D
E
F
G
H
4 2
1
3
H
A
4 1
A
B
C
D
E
F
G
H
A1
B1
C1
D1
E1
F1
G1
H1
A2
B2
C2
D2
E2
F2
G2
H2
A3
B3
C3
D3
E3
F3
G3
H3
A4
B4
C4
D4
E4
F4
G4
H4
PNK/ LT GRN
PNK/WHT
PNK/RED
PNK/BLU
PNK/YEL
PNK/BRN
PNK/ORN
RED/ORN
RED/WHT
PNK/BLU
RED/ORN
PNK/WHT
RED/ORN
PNK/BRN
RED/ORN
PNK/RED
RED/ORN
PNK/ORN
RED/ORN
PNK/YEL
RED/ORN
PNK/LT GRN
RED/ORN
PNK/PPL
RED/ORN
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
A B C D E F G H
1
2
3
4
5 6 7
8
9
10
11
60358
PNK/PPL
MPI ECT Fuel System
90-8M0099748 eng DECEMBER 2015 © 2016 Mercury Marine Page 5A-29
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