"Bama" wrote in message
...
Any good web pages that describe materials and techniques to add a
backup/second battery to my 18 ft outboard ski boat?


There is another thread started on 1/25/2004 with the
heading "Batt Switch/Combiner Install Questions" that
has some discussion of second battery setup.


This link was posted there and is a decent starting
diagram. Also, the West Marine catalog has, I believe
an OK explanation of possibilities for two battery
systems.


I'd like to wire in a combiner and switch as show here
http://www.skingcompany.com/manuals/C50.pdf