i would say the click you hear is the starter solenoid getting power from the battery so check your starter motor and the power wire to the solenoid (should be a black round or square box with two power posts, one from battery one to starter) and also check your earth wire from the starter motor, if it not the wiring it coukld be the brushes are seized/dirty or the armature is burnt. very common problem on my jetskis, and its always the starter or wiring.