Are you saying the you stop the ski and then it won't restart, or is it dying on its own and won't restart?
If you are stopping it and it won't restart without removing the fuse, it sounds like you need to reset the security code. Try this: unplug the blue wire, then hold down the mode button until it displays "CODE", then enter a 4 letter code, then plug back in the blue wire. Now enter your new code to get the "START" displayed.