yamaha multifunction Tach - ox66

[elv2000]

I just bought a boat with twin 200 ox66 1999 and the Tach overheat lamp are always flashing. The engine are running fine with a good stream. I understand they had just changed the gauges. Is there any special dip swithch settings that they might have missed. Both engine are doing the same thing.

Thank
Eric

[boats.net]

Check the dip switch in back of tach and see if all 3 switches are set in down position.