Humminbird HDR 650 manual Transom Mount Transducer Installation

7.Drill the third mounting hole, using a 5/32” drill bit. Use a marine-grade silicone sealant to fill all threedrilled mountingholes, especiallyif the holes penetrated the transom wall.

NOTE: On fiberglass hulls, it is best to use progressively larger drill bits to reduce the chance of chipping or flaking the outer coating.

Fully Tighten All Three

Mounting Screws

8.Re-position the transducer assembly against the transom of the boat, then hand-install all three screws. Make sure that the transducer location and the pivot angle have not changed, then fully tighten all three mounting screws (see the illustration Fully Tighten All Three Mounting Screws). Snap the pivot back down. If you have performed the preceding procedures correctly, the transducer should be level and at the right height for optimal operation.

23Transom Mount Transducer Installation