Jim, I installed a Simrod TP10 on my M15, but have not given it much of a work out. Fuh Shing Pan's M15 uses a group 24 battery I believe. He uses this on the annual Potter Catalina trip which lasts three days. But, it is only used for the trip over and back. He may be lurking on the list and could answer your question.
I'm in Ventura and would be interested in your Channel Islands cruise. Norm M15 #172 _______________________________________________ http://mailman.xmission.com/cgi-bin/mailman/listinfo/montgomery_boats
