I'm a newbe to this site but this is a great place to swap problems. Anyway I have duel yamaha multifunction guages that both read the same when the port motor is turned on and starboard motor switch is off. I know there is a common buss is there something you have to do so that each meter recognizes the right engine.Motors are 2/225 2006 yamaha 4 strokes with 200 hours.This is makin me crazy trying to figure this out without screwing something else up.Thanx amigos