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Bronze Thru-Hull Transducer
and provides a level surface for the fasteners. A fairing block (usually made of wood) can
also serve to create a hydrodynamic water flow around the transducer body. A fairing
block is required for round body transducers. The design and fabrication of this block
varies greatly with different hull shapes; therefore, it should be customized by a qualified
marine technician.
If the transducer is round, a notch on the housing and stem indicates the forward side of
the transducer. This type of transducer is directional in nature and must be aligned with
with the front of the boat (the direction of travel). Failure to align the transducer notches
with the front of the boat will result in incorrect bottom readings.
Temporarily install the transducer to check the fit. Then apply a generous amount of
marine sealant or slow curing epoxy inside the drilled hole and along the mating surfaces
of the transducer housing. If you are using a fairing block, seal the mating edges of the
block as well.
Insert the transducer into the drilled hole from outside the boat, then install the nut onto
the threaded stem from inside the boat. If you are using a fairing block outside the hull,
you must use a similar block inside the hull to provide a level bearing surface. Tighten the
nuts to 10 ft/lbs or use moderate pressure on an adjustable wrench. Do not over-tighten
the nuts. If the hull or fairing block is wood, it will swell when wet.
Routing the Cable
Connect the extension cables to the transducer housing and route the cable to your
fishfinder. Route and secure the cable, avoiding areas where it may be damaged or
interfere with normal boating operations.
Insert the transducer cables into the appropriate terminal slots on the unit. The slots are
keyed to prevent reversed installation, so be careful not to force the connector into the
holder.
Refer to your owner's manual for the correct procedure for installing the connector holder
to the mounting base.
Your fishfinder is now ready for operation.
Customer Support
Your Humminbird® accessory is designed for trouble-free operation and is backed by the
same one-year warranty as our fishfinders, VHF Marine-Band radios, and GPS Navigation
equipment. Refer to your Humminbird® product Operations Manual for the specific
details of this warranty. If you have any questions, call our Humminbird® Customer
Resource Center at 1-800-633-1468. Throughout the U.S. and Canada, hours are Monday-
Friday 8:05 am to 4:30 pm Central Standard Time.
Humminbird
678 Humminbird Lane
Eufaula, AL 36027
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