I recently picked up a used pontoon boat without a motor. The previous owner had bought it just for the 25 hp Evinrude that was on it which he thought was a mid 80's model. He did leave the remote controls and wiring harness with the boat. Since used outboards seem to be found without controls and wiring harnesses more often than not, I'm thinking that if I narrow my search to something that will fit my existing harness, I can save some money and not have to change anything on the boat. All of my J&E experience is with motors from the 50's & 60's so I don't know that much about 70's and newer models. I have the round black plug with 5 wires. I know this should fit a range of years and horsepowers but I don't know which ones. Could someone tell me what range of years and HP used the black plug and was this plug exclusive to Evinrude or did the Johnsons use the same plug?