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Humminbird Fishfinder Tutorial
INSTALLATION OVERVIEW
Your Humminbird fishfinder consists of two primary components to install: the
control head and the transducer.
The control head contains the sonar transmit and receive circuitry, as well
as the user controls and display. It should be installed in a location that
provides access to the controls and visibility while in use. The control head
mounts on a quick disconnect mounting system that swivels and tilts providing
flexibility for viewing from almost anywhere on the boat.
The transducer converts electrical energy from the transmitter into
mechanical pulses or sound waves. The transducer also receives the reflected
sound waves and converts them back into electrical signals for display on the
control head. It should be installed in contact with the surface of the water in
an area that has smooth waterflow- usually on the transom of the boat. There are
several mounting options for the transducr. Review the following section to
determine the method that works for you and your boat.
Determining How to Mount the Transducer
Your
Humminbird fishfinder includes a standard transducer. This transducer can be
mounted on the transom of the boat or bonded to the inside of a fiberglass hull
boat.
The transom installation, which is the most widely used, places the
transducer on the outside of the boat hull. This technique produces the least
signal loss, and provides a way to adjust the transducer after installation. The
mounting hardware included is designed to protect both the boat and the
transducer should the boat strike debris in the water or when trailering.
As
an alternative to transom mounting, it is possible on many fiberglass-hulled
boats to glue the transducer on the inside of the boat hull. Since fiberglass
has similar sonar characteristics as water, the sonar signal can pass through
the boat hull with minimal loss. The hull of the boat must be single layer
construction (not double-hulled) Also, any air trapped in the lamination of the
fiberglass would prevent the sonar signal from passing through.
Inside the hull installations require no holes be drilled into the boat and
through experimentation, high-speed operation comparable to transom mounting can
be achieved. Two-part slow cure epoxy (not included) is required to glue the
transducer in place.
MOUNTING METHODS
Your Humminbird fishfinder comes with everything necessary for installation
and operation on most boats. However, there are several situations which may
require a different type of transducer. Inboard boats, wood or metal hulls, and
sail boats create unique transducer mounting needs Alternate transducers and
mounting methods are detailed below.
Portable Mounting
The standard transducer can be adapted for portable installations with a
portable mounting kit available from Humminbird. This accessory adapts your
transducer to a suction cup mount for temporary installation on the boat hull or
other surface.
Trolling Motor Mounting
The
standard transducer can also be adapted to mount on most trolling motors using a
different accessory kit. This accessory includes a bracket and hose clamp that
allows mounting the transducer to the body of most trolling motors.
Thru-Hull Mounting
Thru-hull
transducers install through a hole drilled in the hull of the boat. Larger boats
or boats with inboard motors create turbulence that make transom mounting
ineffective. Also, hulls that are very thick or are double layered, or made from
materials such as wood or metal, (which do not conduct sonar signals) make
inside the hull mounting inadvisable.
BEGIN INSTALLATION
Now that you have determined the transducer mounting method you can begin
installation of your new Humminbird fishfinder. The installation guide included
on the next few pages provides detailed step by step instructions for
installation of the control head and transducer. For transom mount transducer
installations you will need the mounting template included with your manual.
In addition to the parts included you need the following for installation and
operation:
- A powered hand drill and
various drill bits
- Philips and flat-head
screwdrivers
- A ruler or measuring tape
- Pen or pencil
- 12 volt power source (your
boat's battery)
- A 1-amp fuse
- A fuse holder (if you are
wiring directly to the boat's battery)
- Silicone sealant (for
sealing drilled holes)
- 2-part, slow-cure epoxy (for
inside the hull transducer installations)
Procedures:
Transom Installation
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Step 1
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Do not begin
this transducer installation until you read the Installation Preparation in the
Operation Guide. This chapter contains information critical to the correct
installation of your transducer.
Due to the
wide variety of boat hulls, only general instructions are presented in the
installation guide. Each boat hull represents a unique set of requirements that
should be evaluated prior to installation.
Step One -
Determine Where to Mount the Transducer
Begin the
transducer installation by determining where on the transom to install the
transducer. Consider the following to find the best location:
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It is very
important to locate the transducer in an area which is relatively free of
turbulent water, As a boat moves through the water, turbulence is
generated by the weight of the boat, and the thrust of the propeller(s).
This turbulent water is normally confined to areas immediately aft of
ribs, strakes or rows of rivets on the bottom of the boat, and in the
immediate area of the propeller(s) (Figure 1). On outboard or
inboard/outboard boats it is best to stay at least 15" (40cm) to the side
of the propeller(s)
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If possible,
viewing the transom of the boat while the boat is moving will provide the
best means of locating turbulence free water. If maximum high-speed
operation is a high priority, this is the recommended method. If this is
not possible, select a location on the transom where the hull forward of
this location is smooth, flat, and free of protrusions or ribs
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The transducer
when mounted should point straight down. The design of the transducer will
accommodate a wide range of deadrises and remain ported straight down
(Figure 2)
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On boats with
stepped hulls, it may be possible to mount the transducer on the step.
Never mount the transducer on the transom behind a step, as this area of
the transom will not be in contact with the water at high speed (Figure 3)
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If the
propeller(s) is (are) forward of the transom, it may be impossible to find
an area clear from turbulence, and a different mounting technique or
transducer type should be considered.
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Inside the hull
installation requires the mount system and control head be installed and
operational. See Installing the Control Head for instruction on installing
the unit. Inside the hull mounting generally produces good results in single
thickness fiberglass-hulled boats. Humminbird cannot guarantee depth
performance when transmitting and receiving through the hull of the boat
since some signal loss occurs. The amount of loss depends on hull
construction and thickness, and the installation. This installation requires
slow-cure two-part epoxy. Do not use silicone or any other soft adhesive to
install the transducer, as this material reduces the sensitivity of the
unit. Five minute epoxy has a tendency to cure before all the air bubbles
can be purged. |
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Step One -
Determine the Mounting Location
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Begin the
transducer installation by determining where inside the hull to install the
transducer. Consider the following to find the best location:
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Observe the
outside of the boat hull to find the areas that are mostly free from
turbulent water. Avoid ribs, strakes, and other protrusions as these
create turbulence (Figure 14).
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As a general
rule, the faster the boat can travel the further aft and closer to the
centerline of the hull the transducer has to be located to remain in
contact with the water at high speeds.
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Control Head Installation
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Step 1
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Step One -
Determine Where to Mount
Begin the
installation by determining where to mount the control head. Consider the
following to determine best location:
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The cables for
power, transducer and temp/speed accessories (if applicable) should be
installed first and must reach the mounting location. Extension cables are
available.
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There are two
ways to route the cables to the unit: through a hole in the mounting
surface underneath the mounting bracket or from a hole outside the
mounting bracket. Routing the cables down under the mount provides maximum
weather protection; however this is not always feasible if the area under
the fishfinder is inaccessible. In this case, route the cables through a
hole at another location and cover with the supplied hole cover.
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The mounting
surface should be adequately supported to protect the fishfinder from
excessive wave shock and vibration, and provide visibility while in
operation.
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The mounting
area should allow sufficient room for the unit to pivot and swivel freely,
and for easy removal and installation (Figures 18-19)
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