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Mercury V8 300

Mercury V8 300
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1 - Fuel injector 1
2 - Fuel injector 2
3 - Fuel injector 3
4 - Fuel injector 4
5 - Fuel injector 5
6 - Fuel injector 6
7 - Fuel injector 7
8 - Fuel injector 8
9 - PCM connector A
10 - Fuel supply module
11 - Fuel pump relay
12 - Main power relay
13 - Hot stud
14 - Fuse holder ‑ three 20‑amp fuses shown
15 - Chassis ground
Connector Pin Wire Color Function PCM
65694
A
B
A Red/orange Fused (20 A) 12 V power (+)
B
Pink/brown Fuel injector 1 AF3
Pink/red Fuel injector 2 AD1
Pink/orange Fuel injector 3 AF4
Pink/yellow Fuel injector 4 AF1
Pink/blue Fuel injector 5 AE1
Pink/purple Fuel injector 6 AF2
Pink/white Fuel injector 7 AC1
Pink/light green Fuel injector 8 AB1
53172
B
A
A Pink Fuel pump 12 V power (+)
B Black Chassis ground (–)
86
87
85
30
59637
30 Red/pink Fused (20 A) 12 V power (+)
85 Yellow/black Fuel pump relay (FPR) control AB4
86 Red/blue Fused (20 A) 12 V power (+)
87 Pink Fuel pump 12 V power (+)
Hot stud ring terminal Red 12 V battery power (+)
MPR 86 Yellow/purple Main power relay (MPR) control signal AA2
MPR 87 Red/white Switched 12 V power (+)
Troubleshooting and Diagnostics
90-8M0146617 eng JULY 2018 © 2018 Mercury Marine Page 7B-9

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