Most all US steering cables have the part number heat-stamped in the outer casing about 1 foot from one end of the cable or the other. Usually on the engine end. You can give that part number to most any marine dealership and they can get you a replacement cable. The first digits are the part number, the last two are the length in feet. If you just can't find any number, you may wind up replacing the whole steering assembly with a kit, including a new cable and steering gearbox. Not that much $ more than a cable only. Over many years, the steering cable manufacturers change the gearbox ends of the cables, where they thread into the steering box. Your are 25 years old.... While they may appear the same as your old one, just be careful that the gearbox end is configured exactly the same as your original, or it won't go through the gearbox teeth. There are also heat-stamped part numbers are on the ends of the control box cable casings.