1985 Evinrude 140H/P VRO The ever asking questions on VRO's. Last summer I bought a boat with the above motor on it and used it for 3 or 4 months, Over the winter am doing a complete overhaul on motor. Carb kits(carbs were loose as I had mentioned on line earlier) and changing out the VRO. It is an old 3 wire and am changing to the new 4 wire(5004559). Am also changing to the tach that goes with it(0177103) and harness(0176709. I am wondering if anyone out there has done this changeover and if there is anything I should look out for. The reason I am going to the tach is that it has warning lights and as I am deaf, I can not hear the system with the buzzer as it is equipped now. Any help would be appreciated Merry Christmas to everyone