86 Johnson 50 50TLCDE. It has the CD2 ignition system. I see no voltage rise (~12 volts) at the battery terminals around 2000 rpm. The tach still works fine and the engine runs fine. Rectifier, most likely? Puck lookin thing with 1 yellow 2 yellow/blue stripe in and 1 red out. Part #OA11U20 maybe. How do I proceed from here guys? Am I on the right track?