I just bought a 1991 Evinrude 150HP Tracker. The VRO has evidently been disabled but all components and lines are still there. I have a wiring diagram of that motor but it does not show the 4 wire plug that goes to the VRO. It is presently unplugged. It looks like this is a standard fuel/oil pump powered by pulses from the motor and does not need the plug for operation. Probably goes to the alarm system but I'm not sure. Does anyone have a wiring diagram showing the wiring from the VRO to wherever it goes or can someone tell me a little about it. Thanks a bunch.