Home › Forum › Ask A Member › 1969 Mercury 350 (35hp) – Charging circuit and lithium ion battery issues › Reply To: 1969 Mercury 350 (35hp) – Charging circuit and lithium ion battery issues
Unfortunately I was unable to replicate the problem when I was troubleshooting with the boat out of the water. Yes, the battery does have a battery management system that will shutoff the battery if any of the parameters exceed certain thresholds. When troubleshooting, I did disconnect the outboard from the battery and tested the voltage coming from the outboard when running. I could only read an alternating current voltage of 0.2V. It did not change significantly when reving the outboard. There is a possibility that my multimeter is faulty or could not pick up higher frequency voltage fluctuations. I’m going to purchase a new multimeter today and test again.
Bottom line, I am hoping to find someone with knowledge about this specific outboard to tell me if it does or does not have a charging circuit. And also if disconnecting it from the battery while running will do any damage.