New Transducers 250C Manuale Utente

G

ETTING

 S

TARTED

 > 

I

NSTALLATION

1.  Lightly sand the surface of the hull and face of the transducer 

with 400-grit wet or dry sandpaper.

2.   Build a dam using strip caulk about 1/4” (6mm) tall. Pour 

about 1/8” (3mm) of two part, slow cure epoxy in the dam. 

3.  Place the transducer in the epoxy, turning the transducer to 

work out any air bubbles.

4.   Weight the transducer in place and allow to cure for 24 

hours.

Though it is possible to perform some checks with the boat trailered, 

the boat should be in the water to properly test the sonar installation. 
Press the 

POWER/BACKLIGHT

 key (page 13) and the Fishfinder 

250/250C should power on. If the unit fails to power on, verify that 

the power/data cable is seated properly in the back of the unit, the 

Red and Black wires are connected to the correct polarity, and the 

2-Amp fuse is installed and not blown. If the unit is connected to a 

power supply that exceeds 35 Volts DC, a “Battery Voltage High” 

warning is displayed and the unit turns off. If the unit does not detect 

a transducer, it automatically enters Simulator mode. 
When the unit detects a transducer on initial power up, a “Please set 

up transducer” message is displayed. Press the 

ENTER

 key (page 13) 

to select the transducer type. Highlight your transducer type with the 

ARROW

 keys and press 

ENTER

. Press 

ADJ/MENU

 to return to the 

Sonar display.

Since water is necessary to carry the sounder’s sonar signal, the 

transducer must be in the water to work properly. It is not possible 

to get a depth/distance reading when out of the water. As the unit 

powers on, it should immediately start showing the bottom. Verify 

that the unit is not in the Simulator mode. If the unit is in the 

Simulator mode, make sure that the transducer is connected properly 

to the unit. When you place your boat in the water, CHECK FOR 

LEAKS around any screw holes that have been added below the 

water line. DO NOT leave your boat in the water for an extended 

period of time without checking for leaks. 
Begin testing the installation at a slow speed. If the sonar appears 

to be working properly, gradually increase the boat’s speed while 

observing the sonar’s operation. If the sonar signal suddenly is lost 

or the bottom return is severely degraded, note the speed at which 

this occurs. Return the boat to the speed the signal was lost. Make 

moderate turns in both directions and see if the signal improves. If 

the signal strength improves while turning, adjust the transducer so 

that it extends another 1/8" (3mm) below the transom of the boat. 

It may take several adjustments to eliminate the degradation. If the 

signal does not improve, it may be necessary to move the transducer 

to a different location.