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GUARANTEED DEPTH PERFORMANCE 
 
Your Humminbird Digital is guaranteed to operate to 400 feet when the unit and transducer are 
properly installed, following the instructions in this operations manual. 
 
It cannot be emphasized enough how important it is to correctly install the unit and transducer. 

Improper installation will void the depth guarantee 

because it can degrade the unit’s 

performance. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Summary of Contents for HDR 400G

Page 1: ......

Page 2: ...n the unit and transducer are properly installed following the instructions in this operations manual It cannot be emphasized enough how important it is to correctly install the unit and transducer Improper installation will void the depth guarantee because it can degrade the unit s performance ...

Page 3: ...luding aluminum Please carefully consider the following before installing your transducer TRANSDUCER MOUNTING OPTIONS A Transom Mount The Humminbird high speed transducer allows the transducer element to be mounted below the bottom of the boat hull keeping the transducer out of turbulent water and insuring good high speed operation The transducer will absorb the blow of any obstruction ...

Page 4: ...e bronz thru hull transducer has a threaded stem which installs through a hole drilled in the boat hull leaving the housing exposed under the boat This type of installation must be used for many boats with in board engines because there is no suitable location on the transom away from the noise and turbulence created by the prop A bronz thru hull transducer should be installed by qualified personn...

Page 5: ...o use a silicone sealant between the screwhead and bracket in order to prevent leaking See Figure C Step 2 BRACKET INSTALLATION Fiberglass Boats If your boat has a stepped transom located below and under the main transom the compact transducer design allows mounting in this area This mounting location is recommended for good reading at very high speeds See Figure D To install the metal bracket on ...

Page 6: ...ically in the three slots found in the bracket It is important to use a silicone sealant between the screwhead and bracket in order to prevent leaking Step 3 TRANSDUCER PIVOT ASSEMBLY Assemble the pivot to the transducer main body using the two x5 8 allen head screws two 3 8 tooth washers and two square nuts Make sure the tooth washers are sandwiched between the transducer main body and the pivot ...

Page 7: ... the bracket Slide the O ring on to the headed pin and insert it through the two parts Assemble by screwing the x3 8 allen head screw into the end of the pin and tighten See Figure G Step 5 ANGLE ALLIGHMENT Set the transducer angle so that it is parallel with the bottom of the boat hull Once proper alignment is achieved tighten the two allen head screws using the 5 32 allen ...

Page 8: ...th this type installation it is important that the transducer be mounted by someone familiar with the use of two part epoxy adhesives For this reason Techsonic Industries Inc will not be responsible for any damage due to the mounting of your transducer in this manner NOTE An Epoxy Kit Part N EPK is available from Humminbird This Epoxy Kit has been formulated for Inside Hull Transducer Installation...

Page 9: ...eye of the transducer The bubbles will disappear in a short time or can be removed by rubbing the transducer eye with your fingers while the transducer is in the water 4 If your instrument should fail to function be sure to check all the electrical connections before removing the transducer or calling a serviceman 5 Inspect your transducer cable and make sure that it has not been cut or damaged to...

Page 10: ...Install the mounting knobs and tighten snugly The unit can now be swiveled and tilted to any desired position ...

Page 11: ...acket can also be mounted directly to the dash without the swivel mount however this method is not recommended since the unit cannot be rotated INSTALLING THE CABLES Your LCR comes equipped with Humminbird s new Angle Lock power and transducer connectors The power connector is identified with the letter P on the back of the plug ...

Page 12: ...hole cover after determining the necessary wire length from the hole The power cable has a red lead to the positive post and the black lead to the negative post Install a 1 amp fuse between the red cable and positive post of your 12 volt battery If a fuse panel is available we recommend wiring the power cable into the fuse panel Note The LCR must be fused separately from any other accessory Your A...

Page 13: ...ble This should only be attempted by a qualified service technician 6 If your unit is not working properly and you suspect the problem might be in your transducer we would recommend you borrow a unit from a friend and try it on your boat If the symptoms are the same you can almost be assured that the problem is in the transducer or in its installation INSTALLING THE UNIT Your Humminbird Digital ha...

Page 14: ...on a surface near the dash or a hole can be drilled so that the alarm can be sounded directly through the dash see Figure 12 NOTE If you want to mount the alarm farther away than the one foot cable will allow you may splice in a 2 conductor cable up to 20 feet from the unit The unit housing will mount in a 21 e small gauge hole Pass the cables through the hole Hold the unit housing in place and ma...

Page 15: ...display bezel over the housing making sure that the control buttons are properly positioned through the bezel The bezel may be removed from the housing by prying with a screwdriver ii the slots on either side see Figure 14 ...

Page 16: ...f when reversing the boat the bottom return is lost since air from the prop is being forced under the transducer Remember the transducer cannot transmit through air TROUBLE SHOOTING If the display comes on when the on button is pushed but the bottom depth is not displayed check that the transducer connector is securely locked to the rear of the unit Also insure that the transducer is completely su...

Page 17: ...f press in and hold down the on button Watching the display in about one second you will notice the unit of measure changing from feet to meters to fathoms to feet etc When the desired unit of measure is displayed release the on button This unit is now set and will not change even when power is turned off or is disconnected Alarm On Off The bottom alarm is turned on and off by pressing the alarm b...

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