Here are some links. Maybe one will help.
Lowrance downloadable owner's manuals: http://www.lowrance.com/Manuals/default.asp
Owner's manual for LMS-350a (not sure if this is the right model):
http://www.lowrance.com/Manuals/File...0a_0133-01.pdf
Printed Lowrance owner's manuals (for purchase):
http://www.lei-extras.com/store/sear...er%27s+Manuals
Good luck!
Fisher McFly



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