(1157c Combo models only)
If you have a 1157c Combo model, there are three different installation methods for your transducer:
•Transom Transducer
•Inside the Hull Transducer
•Trolling Motor Transducer.
Your 1100 Series™ uses a Two Piece
NOTE: If the included transducer will not work for your application, you may exchange it, NEW and UNASSEMBLED, with mounting hardware included, for a transducer appropriate for your application - often at very little or no charge depending on the transducer. Call the Humminbird® Customer Resource Center at
NOTE: In addition to the hardware supplied with your transducer, you will need a powered hand drill and various drill bits, various hand tools, including a ruler or straightedge, a level, a 12" plumb line (weighted string or monofilament line), marker or pencil, safety glasses and dust mask, and
NOTE: Due to the wide variety of hulls, only general instructions are presented in this installation guide. Each boat hull represents a unique set of requirements that should be evaluated prior to installation. It is important to read the instructions completely and understand the mounting guidelines before beginning installation.
NOTE: When drilling holes in fiberglass hulls, it is best to start with a smaller bit and use progressively larger drill bits to reduce the chance of chipping or flaking the outer coating.
NOTE: Your transducer may not look exactly like the transducer shown in the illustrations, but it will mount in exactly the same way.
Transom Transducer Installation
(1157c Combo models only)
If you will be installing a transom mounted transducer, use the procedures in this section. There are several procedures you will have to perform in order to install a
•Locate transducer mounting location
•Prepare the mounting location
•Assemble the transducer and perform initial mounting
•Route the transducer cable
•Connect the transducer cable
•Perform a final test of the transom transducer installation.
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