fished a long night running all accessories. Battery was low enough I had to jump across from a trolling motor battery. shortly after starting I started getting a beeping alarm from my warning system. It is a beep ,beep , beep warning. Only ran it back to ramp and loaded up. I have not ran boat since getting home and charging batteries. It was pumping water and full of oil. Could this be a low voltage from battery warning ? Or will that cause a beep, beep, beep? I have never had this happen or ran across it before. It is a 2002 mercury efi 150. It doesn't have any lights on the dash that can show causes. Thanks for any help ideas.