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Old 10-05-2011
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Datamarine Nylon transducer weeps?

My old Datamarine instruments are still in their original locations both instruments and thruhulls. I re-bedded my old transducer last winter when I was replacing my raw water thruhull. The fairing was cracked and I wanted the integrity of a fresh mount. I was hoping that cleaning wiring connections might restore the intermittent readings I was getting from the depth sounder. What I discovered is the Nylon transducer itself seems permeable. In the "cup" above the transducer itself, that is the extension of the thruhull's threaded mount, I get salt water! Not much but enough to eventually fill that "cup". I keep a paper towel stuffed in there to soak it up and replace it once every week or so. Probably a cup of water over the entire season is all that I collected. Any salt water entering the hull is cause for concern but this can only be coming through the Nylon plug itself. I think? I am almost positive. Can the Nylon be that permeable?

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