Take it the Ski is the 96 GTX? The switch could be bad. My bet is the starter solenoid. Check all your connections. If you ever flooded the hull of the ski you may of filled the E-Box with the main fuse, coil and solenoid in it. They don't like being under water for long. You can download the repair manual for free off the Internet. It will give you check out procedure. You will need a cheap VOM to test things. When you go to put box together push seal down on the box then put top on. Make sure it latches on both sides. This can help to keep water out of the box. Most ski's seem to have 2 fuses for basic functions. A 15 amp in E-box and a 5 amp in MPEM computer.