Sorry for the lack of clarity in my post. The Furuno LS 4100 that I hope to replace the old unit with is 50/200kHz. One of the experienced techs that I talked to thinks the old Seafarer 3 transducer is 200kHz, but is not sure. The salesman says that if it is indeed 200kHz then I should be able to use the Furuno.
Last edited by oft; 05-24-2006 at 01:21 AM.