Two cables look at YOUTUBE on how to adjust them adjust both than one has a slot to adjust locking into gear, easy to do in 15 minutes. Check the outdrive oil make sure no water in it. if adjustment with in specs replace the lower cable, you can save about $400 by doing yourself not hard to do watch YOUTUBE videos. Part can be bought on EBAY. only special tool needed is a 9/16 deep socket you will need to grind down just buy a cheep one. If you can remove and reinstall the outdrive you have completed the hardest part .. Again many videos on YOUTUBE and threads on Google .