Never saw one till today. I was coming in and saw a boat at the dock facing toward me. It was smoking like a freight train. I knew from the front that it was a late 80's I/O bowrider. I figured his engine was on it's last leg. I came around behind it and was surprised to see an ancient looking outboard on it attached to the boat with a jackplate about 3 ft long. It was a homemade job, you could easily see where the I/O was.