Quote Originally Posted by Moveon View Post
Was there anything wrong with the boat or wiring or the motor? My Johnson 35HP Motor has a charging system that outputs a DC current into my battery to keep it charged up. A couple of times a diode in the system went bad and the charging system didn't work. The battery went down and I had to use an external battery charger to get the battery charged back up until I could replace the diode in the motor. After that the battery stayed charged.
Nope, two of them were on the troller and at that time had a different charger than the cranking battery. The cranking battery went first, followed by 1 troller battery a month or so later. The final battery gave up about 18 months later. I just got some bad batteries. They wouldn't hold a charge for more than an hour or two when they went.