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What is this and what does it do

This is what I found:

Blanking Plugs for Transducers with Removable Inserts

A blanking plug is designed to be used in a transducer housing when the active insert has been removed for storage or cleaning.
 
Correct. Typically supplied with new boats.
 
As mentioned in a very recent post on the same question.. it’s recommended u do this with it8A485F29-F82D-42D7-B883-62CB511D2C6E.gif
 
We keep ours on the boat, in the bilge next to the transducer, in case the transducer springs a leak or needs repair. We also keep a bag of assorted wooden bungs and a hammer in case any of the other thru hull fittings, valves break or leak on the Beneteau.

This is a pic of my bilge when we were installing a Raymarine RV-200 thru hull transducer. You can see two blanking plugs and a wooden bung. I leave them there so I dont have to look for them if/when I need them.

20180904_120737.jpg
 
Last edited:
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