9VDC
"Steve" wrote in message
news
"chuck" wrote in message
...
I think that might be difficult to say. Among other things,
it will depend
on the actual capacity of your battery (likely to be less
than when it was
new) and the starting requirements of your inboard. Other
factors that
might influence the minimum starting voltage are engine and
battery
temperatures. Worst case is cold battery and cold engine.


I agree. This is just to hard to predict.

The best way to ensure you have enough battery capacity to
start your
engine, is to have a separate starting battery and an
isolation switch.

Much simpler and more predictable.

A good practice would be to purchase a new battery each
season and install
it as your starting battery, move the '1 y/o' from the
previous season over
to aux/house battery service and take the '2 y/o' battery
home for use in
your second car. Small investment but great insurance.

My opinion, FWIW.

Steve
s/v Good Intentions