it can be spliced simple canepole did one for me cut the bad part out and stager the splice iner and outer srinktube both
You can splice, but the temp will not be correct. When you splice a thermocouple wire you make a "cold junction thermocouple" it will read the temp at the junction point and not at the ture test point. But the sonar should work.
Alan
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Tight Lines to all Roll Tide Roll