I just purchased a 96 SPX and the starter button works intermittently. I have to press the button 10 -15 times to get it to work. I get a "click" every time I press it but the engine does not turn over. The ski has a new battery and it turns over very strong when the starter button works. This is my first ski so I know nothing about it. I think I probably need to clean the connections including the ground but I need some help locating them. Pictures would be very helpful. Thanks.