Filter
Top Products
4. INSTALLATION
37
4. Tape the location shown in the figure be-
low. Fill the gap between the wedge front
of the transducer and transom with epoxy
material to eliminate any air spaces.
5. After the epoxy hardens, remove the
tape.
4.5 How to Mount a
Thru-hull Trans-
ducer Inside the
Hull
The thru-hull mount transducer may also be
installed inside the hull on FRP boats. Howev-
er, this installation method affects the ability to
detect the bottom, fish and other objects be-
cause the ultrasound pulse is weakened
when it passes through the hull.
Note: This mounting method should not be
used to mount the transducer that supports
the bottom discrimination display feature,
since performance is greatly degraded.
Necessary tools
You will need the following tools:
Remarks on installation
Installation procedure
If the thickness of the hull varies, then the at-
tenuation of the ultrasound pulse. Select a lo-
cation where attenuation is the lowest.
1. Select 2-3 locations considering the four
points mentioned below. (You will finalize
the mounting location through some trial
and error later.)
• Mount the transducer at a location 1/2
to 1/3 of the length of the boat from the
stern.
• The mounting location is between 15 to
50 cm from the centerline of the hull.
• Do not place the transducer over hull
struts or ribs which run under the hull.
• Avoid a location where the rising angle
of the hull exceeds 15°, to minimize the
effect of the boat's rolling.
Inside-hull transducer mounting location
2. Clean the face of the transducer to re-
move any foreign material. Lightly rough-
en the face with #100 sandpaper. Also,
• Sandpaper (#100)
• Silicone sealant
• Silicone grease
5x20
5x20
M5x14
5°
Tape
Bracket
Transducer
Hull
2 to 5°
Epoxy material
• Do the installation with the ship moored at a
dock, etc. The water depth should be 6.5-32
feet (2-10 meters).
• Turn off the engine.
•
Install the transducer with the engine
room.
• Do not power the unit with the transducer in
the air, to prevent damage to the transduc-
er.
• Do not use this method on a double layer
hull.
• Before attaching the transducer to the hull,
check that the site is suitable. Put the trans-
ducer in a water-filled plastic bag. Connect
the transducer to the display unit and put
the transducer on the installation site. Turn
on the display unit and check that the depth
indication appears.
1/3
1/2
Centerline
Transducer
mounting
location
50 cm
50 cm
15 cm
15 cm