Page 83 - REPOWER REFERENCE GUIDE (2020)

Engine Harness

Example Wiring Diagrams
12 Volt Battery

+ –

RED

Ground
Battery Alternator
Starter Motor
R S

YEL/RED BRN/WHT RED/PUR ORN BLK BLK PUR RED/PUR

PUR/YEL Water

Distributor Ignition Coil C Temperature Sender

Spark Plugs + –

Resistance Wire
GRY

YEL/RED

Interrupter Slave Starter Solenoid YEL/RED Circuit Breaker
Shift Switch RED/PUR

Ground on Starter Solenoid Bracket

GRY BLK Oil Pressure Sender
GRY
BLK

7
8
6
10
1 5 BRN/WHT RED/PUR LT BLU YEL/RED Engine Harness
4 ORN GRY BLK TAN PUR
2 3
10 6 4 8 2 1 3 5 7 48527
MCM 165 engine wiring diagram (ammeter circuit); BIA color code without 90-amp fuse at starter motor (red wire)

90-8M0149179 eng NOVEMBER 2018 © 2019 Mercury Marine Page 4D-3