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INSTALLATION PREPARATION 

INSTALLATION OVERVIEW 

 

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. 

Summary of Contents for Wide 128

Page 1: ......

Page 2: ...our number listed in the Customer Support section INSTALLATION OVERVIEW Your Humminbird fishfinder consists of two primary components to install the control head and the transducer The control head c...

Page 3: ...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...

Page 4: ...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...

Page 5: ...minbird 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 in...

Page 6: ...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...

Page 7: ...g a 5 32 4mm bit drill the two holes to a depth of approximately 1 3cm On fiberglass hulls it is best to start with a smaller bit and use progressively larger drill bits to reduce the chance of chippi...

Page 8: ...ation after high speed testing 1 First adjust the pivot angle of the transducer body so its length is parallel with the length of hull of the boat Then pivot the transducer down so the rear is about 1...

Page 9: ...erference If the cable is too short extension cables are available to extend the transducer cable up to a total of 50 15 m Call Humminbird Customer Support for more information Follow these steps to r...

Page 10: ...hull to install the transducer Consider the following to find the best location Observe the outside of the boat hull to find the areas that are mostly free from turbulent water Avoid ribs strakes and...

Page 11: ...dry the mounting surface If the surface is excessively rough it may be necessary to sand the area to provide a smooth mounting surface Ensure the mounting area is clear and dry 3 Mix an ample quantit...

Page 12: ...y supported to protect the fishfinder from excessive wave shock and vibration and provide visibility while in operation The mounting area should allow sufficient room for the unit to pivot and swivel...

Page 13: ...holes Figure 22 Note if the cables must pass through the mounting surface at a different location drill the 1 25mm hole at that location and pass the cables through from underneath Also you must break...

Page 14: ...ll the excess cable from beneath the mounting surface so the connector holder aligns with the mounting holes on the front of the mounting bracket Figure 27 3 Snap the support plate to the rear of the...

Page 15: ...rmal operation unless you choose another option If you do not press any button before the timer reaches 0 the normal operation screen is displayed If the boat is in water sonar data appears If the bot...

Page 16: ...ly connected Ensure that the boat is in water greater than 2 but less than 600 deep and that the transducer is fully submerged Remember that the sonar signal cannot pass through air Refer to the troub...

Page 17: ...c display is shown to the right of the graphic information The upper number is 0 indicating the surface of the water the lower number is one of the 9 ranges available which best matches the depth of t...

Page 18: ...ries with boat speed and direction The best way to learn to interpret structure is to operate the Wide 128 over a variety of known conditions and experiment with user functions to best represent those...

Page 19: ...have different sonar characteristics so it is not always possible to distinguish fish size between varying species The signal intensity is normalized for depth so that a small fish close to the boat...

Page 20: ...e current setting Within the menu are the options available The selected option or current setting is highlighted in the black box If no adjustment is made this will be the selected setting Pressing o...

Page 21: ...the 0 30 range would be selected This provides the best display resolution and therefore the best target separation possible The Depth Range can be adjusted manually Press MENU repeatedly until the D...

Page 22: ...face to the bottom In Manual Zoom the Zoom range does not move as the terrain changes To operate Zoom Press MENU repeatedly until the Zoom menu is on screen Three options are available Off Factory Set...

Page 23: ...of fish or other targets not connected to the bottom The Fish Alarm has 3 different settings which correspond to the 3 different size fish symbols shown on screen To enable Fish Alarm press the MENU...

Page 24: ...firms the operation of all internal circuitry At the conclusion of the test one of two messages will appear passed indicates that the internal test discovered no failures Failed indicates that a signi...

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