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1157c Transducer Installation
(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 Kick-up transducer mounting bracket. Find the section that describes
the method of installation you will be using.
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
1-800-633-1468 for details and pricing, or visit www.humminbird.com.
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. 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 marine-grade silicone sealant.
NOTE: Please read all instructions carefully and completely before beginning the installation process.
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 transom-mounted transducer. They are:
• 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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