On 12 Mar 2007 10:30:21 -0700, "jim.isbell"
wrote:

Now, what if the one on the engine fails? Well, I have four more on
the house bank and any one of those can replace the engine battery
with a flip of a switch.

You can't start a big diesel on a small 12 volt Walmart battery, not
for very long anyway.

Period.

If you're boat has 8Ds on it, they are there for a reason.

Garden variety 12 volt batteries are lousy performers in deep cycle
marine service as well.