I had a new transducer fitted last week. Seems mine was incorrectly mounted when the boat was manufactured and it has filled with water. What is interesting is that 2 different marine electricians told me to replace the pair of E120's as they were faulty. That's was a $20,000 job. In the end the job cost $2,900 including pulling the boat out. Just shows you how you can get stung on the water.