Ground Circuit
All ground circuit s are essential to reliable outboard performance. Make sure all ground connections are clean and tight. Refer to wiring diagrams for specific wiring details
EMM Ground Tests
Use an ohmmeter to check continuity of ground circuits. Calibrate the ohmmeter on the high ohms scale. Resistance readings for all ground circuits should be 0 Ω.
System/power supply grounds: Check continuity between terminal pins 5, 7, and 8 of EMM J2 connector and the main harness ground.
Injector circuit grounds: Check continuity between terminal p ins 14, 20, a nd 2 1 of the EMM J1 -B connector an d the main harness ground.
Sensor circuit g rounds: Check continuity between terminal pin s 26 and 27 of the EMM J1-A connector and the appropriate sensor ground connections. Refer to wiring diagrams.
- Main engine harness ground
Fuse
The engine harness 12 V (B+) circuit is protected by one automotive style 10 amp mini fuse.
The fuse is located on the port side of the powerhead, in the flywheel cover.
005004
- Fuse
- Spare fuse
IMPORTANT: Repeat failures of fuse could be the result of faulty connections or accessories. The 12 V accessory circuit (purple wire from terminal “A” of key switch) is of ten used to power accessories.
