305 Express w/Twin 2019 Suzuki 300 no spark

[Mr. Fish]

Need help. Starboard engine starts. Port engine cranks no start. ECM main relay has 12v at white wire 0 volts at Gray. Installed ground to relay to close contact (ckt48 orange wire) motor starts and runs.
All ECM ground and power feeds good. Please help!!!

 

[Fishtales]

Maybe see if there is a Zuki forum or a manufacturer's forum that hangs Zuki's off the rear. Maybe someone will assist.

 

[SkunkBoat]

zukes have small black & white wires to the battery with a 30A fuse.

You have fly by wire controls? push button start, one key, one kill switch?