Transducer

[ping1998]

Is their any way to test a transducer to se if it works bout boat used has used portable lcd 400 humming bird want to make sure it good thanks.

[Mr.T]

Is their any way to test a transducer to se if it works bout boat used has used portable lcd 400 humming bird want to make sure it good thanks.

Most Humminbird sonar units have a "self test" function that will tell you if the transducer is working or not.