Hi Jeff If you have the screw on plug for the transducer then you should pull the transducer. Suprisingly little water comes in with the ST60 speed transducer removed. Process is 1. Unscrew the retaining ring, 2. Pull out the transducer, 3. Screw on the plug in place of the transducer. Takes less than ten seconds and not a lot of water comes in.
Transducers foul by this time of year and require cleaning. Likely the boat has been in the water for a number of months and the water has been warm. This is pretty normal. Mike Hoyt Persistence Halifax, Nova Scotia From: Jeffrey Brideau <[email protected]> Sent: September 23, 2020 12:35 PM To: Stus-List <[email protected]> Subject: Stus-List Raymarine ST60+ Speed We've got an Autohelm package on the boat we purchased in August with ST60+ instruments. The speed sensor reported 0KTS during survey. I cleaned the paddle and it turned free during survey haulout and the instrument worked fine for several weeks after that. Then, the speed returned to 0KTS but the temperature read fine. I casually brushed the paddle while in the water (not brave enough to pull it out while floating yet, want to try in on the hard first. No idea when the last time this was done) and it was no help. Last weekend the temperature suddenly doubled reporting about 135F seawater. I lifted the instrument and measured resistance across what appears to be a 10k thermistor and it correlated well to a 10k chart suggesting water temp at the marina was near the expected value. Am I jumping the gun to assume the display has gone bad given the temperature sensor seems like it is working or should I check something else? Thanks, Jeff
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