The 898 will operate fine, we believe, with a new transducer. Though in time we feel it will loose signal. To remove the transducer will damage the potting around the puck. We dont believe sending it will do anything other than them saying you have a bad transducer. Send the head unit in for a burn in test and checkup. Have them Reformat after heating it up and then reinstall. We think a different head unit would work fine on your transducer though it possibly does need one and we would suggest a new transducer.