I have a 87 5.7l omc with a cobra drive. I tried to get the boat out and it would not go in gear it just revs up when i try to put it in gear. Like its stick in neutral. I searched around and seen people with kinda the same problem and they are saying it might be a lower shift cable. Is there any type of test i can do without taking the outdrive off.If it is and i get it replaced what else should i also get replaced since they have the outdrive apart? Thats for the help