Greg usually checks in Monday -Friday....
He will probably have an definite answer for you then...
Rickie
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a man has 2 hummingbirds. one 521 and a 535. he would like to know if the transducers will interchange?
Greg usually checks in Monday -Friday....
He will probably have an definite answer for you then...
Rickie
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You may want to check the model number there olduckhunter as we have not made a model 521, but as long as there is no “DI” or “SI” in the model name the transducers should exchange.