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Old 02-25-2019, 04:17 AM
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Join Date: Aug 2012
Location: Brigantine, NJ
Posts: 2,473
Default Can't read depth > 50'

Raymarine C90, CP370 Digital Sounder and M260 shoot-through transducer.

Unit reads fine at depths below 50', but looses bottom on anything > 50'. Not a new setup and no recent changes.

Added mineral oil to the ducer box before the last trip (might have been a little low), no help. Previously, the ducer was used when the box was low on fluid - could some of the elements have been fried?

I pulled the ducer plug on the sounder to check the connection, looked good but now the ducer is not recognized on the C90. No depth and no ducer in the settings.

Any suggestions on where to look/start (other than the leak in the ducer box, which we know needs to be fixed)?

Last edited by BayHouse; 02-25-2019 at 05:25 AM.
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