Shore power was still attached when engines were started. That could explain it.
I'm the owner. It Is looking like the issue is that the batteries were left in parallel and the majority were at their service life so all...
Not sure about the stern thrusters but you are probably right. Will be back on board Monday with Electronics tech but the more we discuss it...
Thanks for all the great suggestions. Yes we were using the thrusters when the shut down happened. They are on a separate battery bank. Not sure...
2007 Marquis 650 with MTU's. Engines started normally, bow and stern thrusters worked normally with shore power disconnected and gen set off....