baddog1016
Regular Contributor
engine is a 2000 225 Evinrude. Engine ran fine when I winterized it in December. I cleaned all of my battery connections today, hooked the batteries up and turned on #1, the AGM. Immediately there were significant sparks from the positive terminal. I turned the battery back off, disconnected the positive cable and made sure there wasn't a short to ground. There wasn't, my meter showed 24M ohms resistance between positive and ground which shouldn't have caused sparks like I saw. I put everything back together and tried again. It turns out the positive terminal stud is a bolt that is soldered into the battery. It came unsoldered! I was perplexed, checked for a short to ground again at the battery cables, at the transom junction and at the motor. Nothing. Being brave or stupid I held the ground wire on my number two battery and turned in on and nothing happened. The battery is charged to 12.84 volts and I had 12.84 volts at the hot side of the starter solenoid and ground. I turned the key and nothing happened, I don't even have engine tilt. I am going to look carefully at the schematic when I'm done writing this but I'm wondering if anyone has ever seen an AGM battery do this. I was in the car business for 35 years and have seen batteries that have exploded but I've never seen a battery do this. Anybody have any clues? It doesn't seem like it could be internal to the battery. The ignition switch was off during the battery meltdown episode. Thanks in advance for any ideas.
