GROUND CIRCUITS
All ground circuits are essential to optimum outboard performance. Make certain all ground connections are clean and tight. Refer to wiring
diagrams to identify specific wiring details.
Test Procedure
Disconnect the battery cables at the battery.
Use an ohmmeter to check grounds at the appropriate pin locations of the EMM. Calibrate the ohmmeter on the “high” ohms scale.
Connect the ohmmeter red lead to the ground wire and the black meter lead main harness ground. Resistance readings for all ground circuits should be 0 Ω.
Main engine harness grounds from solenoid ground terminal screw to:
Injector circuits: check continuity to terminal pins 14, 20, and 21 of the EMM J1-B connector.
Ignition circuit: check continuity to terminal pin 16 of the EMM J1-B connector.
Power supply: check continuity to terminal pins 6, 7, and 8 of EMM J2 connector.
Starter solenoid: check continuity at terminal B.
Trim and Tilt module: check connection at main ground terminal (solenoid mounting screw).
Ignition grounds on lower coil mounting screw to:
- EMM ignition circuits: check continuity to terminals pins 11, 17, and 24 of the EMM J1-B connector.
- Solenoid screw
- Coil screw
FUSE
The engine harness 12 V (B+) circuit is protected by one automotive style 10 amp minifuse. The fuse is positioned in the flywheel cover on the port
side of powerhead, next to the starter assembly.
- Fuse
