I believe my steering cable is getting stuck in my guide tube on my mercruiser alpha I stern drive (1986 Sea Ray Seville 140). What is the best way to get it out? Anything I should be careful of? Can't turn the wheel at all right now. Used it two weeks ago and it was hard to turn at first and then loosened up. I removed the coupler nut on the guide tube and then the wheel was free to turn but a thinner diameter part of the cable would come in and out of the tube on the coupler nut side but the end of the cable wouldn't move. I assume then it is stuck in the tube and the whole steering cable is moving instead. Any advice?