Just to give a little background on the ski, its a 96 that I premix gas on. The battery will not hold a charge when taken directly off of the charger. I take it to the lake and drop it 5 mins after taking it off the charger and it barely has enough power to start. I have tested the rectifier at 5500 rpms and I get about 13.5v. Currently it is in pieces with the plug going into the magnito cover disconnected and the battery is holding strong at about 12.5v. I think it is the coils inside of the magnito housing but I'm looking for a second (or third) opinion. Any help would be greatly appreciated. Thanks guys!