I have twin yamaha 150's, year 2011. Starboard throttle when put in reverse makes boat go ahead. And when I put it ahead, it does nothing. When in Neutral and I start starboard engine, boat surges ahead. I know it's a cable problem, opened the cowling and they appear to be still connected. What and where exactly should I be looking to see if cable has slipped? If anyone has an image they can post showing what is the part I can adjust - that would be awesome! I've located the cables ok just don't know where the pin is.