My car has a feature that will automatically start it and charge the
batteries if the voltage drops below 11 volts. I haven't tested it
but apparently the designers felt this was a good figure.

Doug

"Mvd" wrote in message
om...
Hi,

I am planning to make a device that gives a signal (beep) when my
voltage drops at a level that i cant start my boat engine. I have to
know aproximaly what voltage is the minium to start.

I have an 4.3l V6 mercruiser inboard. What will be a save voltage to
program in the device?