Will the 898 work with my 798 transducer? I have the original transducer that came with the unit
I assume that yours is a SI unit. If so, Humminbird shows that it should have come with the XNT 9 SI 180T which is the same transducer that the 899 comes with out of the box. The transducer that I am adding with the 899 is the HD transducer but it doesn't show that it is compatible with the 799. But to answer your question, yes, it will work with your transducer. You should see a sticker on the transducer cable, telling what model it is and then you can look it up at humminbird and it will tell you all units that are compatible with it.