Join Date: Jul 2001
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This question comes up so many times, that I've developed an Electrical 101 thread with links to many discussions about this very topic, which includes replies from many of the folks who have chimed in here.
See reply #2 for a very succinct summary of what to do. Get you alternator output off the CV post of the 1-2-B switch and follow btrayfors, Brian's and Maine Sail's advice.
All the best,
Stu Jackson, Catalina 34, 1986, M25 engine, Rocna 10 (22#)