I have a 1976 Johnson 200 Serial 200TL76S that will not go into reverse and forward operates incorrectly. Of course I bought the boat lake ready and have had nothing but problems since day one. When I engage forward, I have to go past the inital engage spot on the controller. Forward will click for about 10-15 seconds then slightly jump into gear. Reverse will click and never go into gear. I can manually put the engine in forward and reverse on land without the engine running and the prop will lock up in one direction. With the engine running, I could only get forward to completely engage, reverse would only click, then spin with no power. I thought the shift cable was the problem so I replaced both the shift cable and the throttle cable. Did not fix the problem. No matter how I adjust the cable, I can not get both forward and reverse. When I was able to get it into forward, on the water, it felt like it would slip out of gear just for a moment at moderate throttle. It did this 3-4 times in about 15 minutes. Any help would be greatly appreciated.