1. INSTALLATION
8
1.3.3
How to mount a transducer inside the hull
The transducer may also be installed inside the hull on FRP boats. However, this in-
stallation 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 a transducer that supports
the RezBoost
™
, ACCU-FISH
™
and/or bottom discrimination display features, since
performance is greatly degraded.
Necessary tools
The following tools are required:
Remarks on installation
Installation procedure
The attenuation of the ultrasound pulse varies with the thickness of the hull. Select a
location where attenuation is the lowest.
1. Select 2-3 locations considering the four points mentioned below.
2. Decide the most suitable site from the locations selected.
1) Connect the power cable and transducer cable to the display unit.
2) Put the transducer into water-filled plastic bag. Press the transducer against
the chosen site.
3) Turn the power on.
4) After the startup procedure completes (approx. 90 seconds), the last used dis-
play appears. Tap the [Home] icon to show the home screen. See section 3.1
for how to use the menu.
5) Tap [Settings], then tap [Fish Finder].
6) Drag the [Fish Finder] menu to show the [Initial Setup] menu.
7) Tap
[Transducer].
8) Confirm the available fish finder from the list of available sounders, then tap
the appropriate fish finder.
• Sandpaper (#100)
• Marine sealant
• Water-filled plastic bag
• Do the installation with the ship moored at a dock, etc. The water depth should be 6.5
to 32 feet (2 to 10 meters).
• Turn off the engine.
• Do not power the unit with the transducer in the air, to prevent damage to the trans-
ducer.
• Do not use this method on a double layer hull.
• Before attaching the transducer to the hull, check that the site is suitable, by following
steps 1 to 3 in the installation procedure below.
• Mount the transducer at a location 1/2 to 1/3 of the length of your 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.
1. INSTALLATION
9
9) Tap the [<] icon to return to the [Fish Finder] menu
10) At the [Transmission Power] menu item, tap [High] or [Low] as appropriate.
11) Drag the right-hand side of the screen leftwards to show the slide-out menu.
Tap the toggle button at [Transmission] to show [ON].
Check if the bottom echo appears on the screen, in the display area.
If no bottom echo appears, repeat the procedure unit a suitable location is
found.
3. Remove the transducer from the plastic bag and wipe the face of transducer with
a cloth to remove water and any foreign material. Lightly roughen the face with
#100 sandpaper. Also, use the sandpaper to roughen the inside of the hull where
the transducer is to be mounted.
4. Wipe off any sandpaper dust from the face of the transducer.
5. Dry the face of the transducer and the hull. Coat the transducer face and mounting
location with marine sealant. Hardening begins in approx. 15 to 20 minutes so do
this step without delay.
6. Attach the transducer to the hull. Press the transducer firmly down on the hull and
gently twist it back and forth to remove any air which may be trapped in the marine
sealant.
7. Support the transducer with a piece of wood to keep it in place while the sealant
is drying. It takes 24 to 72 hours to harden completely.
8. Turn the power on and change the menu setting as shown below. See section 3.1
for how to use the menu.
1) Tap [Settings], then tap [Fish Finder].
2) Drag the [Fish Finder] menu to show the [Initial Setup] menu.
3) At the [Transmission Power] menu item, set the transmission power to [High].
4) At the [Offsets] menu item, adjust the settings as shown in the table below.
Menu Item
Setting
HF Bottom Level
-40
LF Bottom Level
-40
HF Echo Offset
20
LF Echo Offset
20
