I have a 1968 9.5 evinrude sportwin outboard motor that I was using today on the river that stopped working. I was driving it and it was running fine until I stopped and turned it off. I started it again and it cranked up in one pull. However when I went to switch it into forward from neutral nothing happened. The lever will move, but the boat won't. It does the same thing when I put it into reverse. What could this be? I feel as though it is a simple fix, so I would like to try and do it myself. Please help!