depth finder issue on 740s garmin

oddysea1

Petty Officer 1st Class
Joined
Sep 22, 2011
Messages
201
no manual-purchased boat the owner had the transducer in a pastic bag filled with water lying in bilge -does water in bag have a purpose in order to get a proper depth reading-I emptied thinking it was bilge water now not sure-
 

dingbat

Supreme Mariner
Joined
Nov 20, 2001
Messages
16,038
no manual-purchased boat the owner had the transducer in a pastic bag filled with water lying in bilge -does water in bag have a purpose in order to get a proper depth reading-I emptied thinking it was bilge water now not sure-
A plastic bag full of water is used to test the signal returns to determine the area best suited for aN in-hull transducer installation.

Sounds like they got to that point and stopped.

Follow these instructions to complete the installation

https://support.norcrossmarine.com/...In-Transducer-Instructions-with-Illustrations
 
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