I had the same problem 2 yrs ago up on erie. I took it to a marina and they adjusted the cable. it shifted good for awhile but I ended up having to replace the shift cable. I don't even remember just what they charged me but it wasn't that much. you can call around to a few marinas and ask what they charge to replace a shift cable. or you can do like somebody already said and buy you a new shift cable off ebay and install it yourself. I just don't know that much about shift cables so I had mine changed by someone that knew what they were doing.