How to connect Yamaha 150 meters?

[maranello]

I have twin Yamaha 150hp (four stroke). When both engines running, speedometer and fuel management meters is on.
When starboard engine running, and port engine is off, speedometer and fuel management meters is on.
But when starboard engine is off, and port engine running, speedometer and fuel management meters is off.
What kind of wires i need, that all the time both (speed and fuel) meters is on? And how i connect it? Engines are model 2004.
Thank you in advance

[rodbolt17]

none, its desined that way.
however you can use the diode kit from yamaha to accomplish what you want.
the reason is if you hook the yellow key on ign wires together you will power up both engines ECU and accessories with one key switch.