Just bought a 2004 Kawasaki Ultra 150 with 80 hours on it. The previous owner bought a new ski and hadn't used this one for the year. Still had stabalizer in the gas from the prior year. Went through the first tank of gas fine and once new gas was in replaced the plugs. Used the ski for about 8 hours then it stalled out in the middle of the lake. No warning lights or anything to indicate overheating etc. Went to try to restart it and hear just one click and that is it, engine will not turn over. Waited a few days to try it again and still getting just once click. Any ideas as to what could have happend and how to solve ? This is my first jet ski so I am pretty clueless.