Tacktick intermittent knotmeter malfunction

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum Andy,

We're sorry to learn of the reported issue with your TackTick system. Should one of these components not be faulty, then rapid rotation of the transducer's paddlewheel should result in speed readings over 1kt. In this case, the fault may be rooted within either component. Should a customer be uncertain about whether their is a problem with the hull transmitter or a transducer, then it would typically be recommended that the hull transmitter be sent to Raymarine’s Product Repair Center to be bench checked / serviced and to avoid potentially replacing the incorrect item. Should the hull transmitter be found to function correctly through a range of speeds by the Repair Center, then it would be advised that the transducer be replaced. Should it be convenient to do so, then the transducer should be sent to the Repair Center along with the hull transmitter. As you have indicated that you have replaced both the hull transmitter and transducer, it is recommended that the hull transmitter be sent to Raymarine’s Product Repair Center to be bench checked / serviced.