I'm in the middle of a possible VRO problem related to over oiling and have not yet had time to run the necessary tests on my 150 Johnson 1995. I also have a non-working tachometer and have been reading posts related to the gray wire and the rectifer. <br />Is it possible that these two problems are related? I believe the gray wire from the VRO connects directly to the gray rectifier wire and the purple wires connect the vro to the rectifier. <br />Do the VRO wires have anything to do with regulating the oil and fuel or are they simply "sends" for warning horns?