2009 Yamaha F40 Outboard Service Manual, Page 105Get this manual
Electrical component and wiring harness routingCircuit diagram
Circuit diagram
The circled numbers in the illustration indicate the engine ECM terminal numbersPulser coil Fuel injection #1
52 51 50 49
Fuel injection #2 Fuel injection #3 Vapor shut-off valve
Air pressure sensor
Speed sensor
Oil pressure alert indicator
Water pressure sensor Trim sensor
Overheat alert indicator
Diagnostic flash indicator
Thermo sensor
Air temperature sensor
Alert buzzer
Oil pressure switch
Engine ECM Tachometer