Furuno FCV-587, Operator'S Manual

Page: 46 / 83

4. INSTALLATION
39
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. Do not install
the transducer inside the hull on a steel or
wooden hull vessel, since the ultrasound
pulse cannot penetrate those hulls.
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 may vary.
Select a location where the attenuation is the
lowest.
1. Select two or three 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
5x20
5x20
M5x14
5
°
Tape
Bracket
Transducer
Hull
2 to 5
°
Epoxy material
• Sandpaper (#100)
• Marine sealant
• Silicone grease
• 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