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Maintenance 

 
Your 300TX is designed to provide years of trouble free operation with virtually no 
maintenance.  Follow these simple procedures to ensure your 300TX continues to 
deliver top performance. 

• 

If the unit comes into contact with salt spray, simply wipe the affected surfaces 
with a cloth dampened in fresh water.  Do not use a chemical glass cleaner on 
the lens.  Chemicals in the solution may cause cracking in the lens of the unit. 

• 

When cleaning the LCD protective lens, use a chamois and non-abrasive, mild 
cleaner.  Do not wipe while dirt or grease is on the lens.  Be careful to avoid 
scratching the lens. 

• 

If your boat remains out of the water for a long period of time, algae and other 
marine growth an reduce the effectiveness of the transducer.  Periodically, clean 
the face of the transducer with liquid detergent.  Pivoting the transducer up the 
bracket may allow better access for inspection or cleaning. 

• 

If your boat remains out of water for a long period of time, it may take some time 
to wet the transducer when returned to the water.  Small air bubbles can cling to 
the surface of the transducer and interfere with proper operation.  These bubbles 
dissipate with time, or you can wipe the face of the transducer with your fingers 
after the transducer is in the water. 

• 

Never leave the 300TX in a closed car or trunk- the extremely high temperatures 
generated in hot weather can damage the electronics. 

 

Summary of Contents for 300TX

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: ...ponds to control inputs as if it is in actual operation so feel free to experiment or to customize the unit for your particular operation To exit Simulator mode power the unit off When in simulator mo...

Page 17: ...e changes as necessary in order to retain a bottom representation on screen When in Auto mode the horizontal line at the top of the screen is the zero line representing the surface of the water Occasi...

Page 18: ...usters of individual dots near the 0 line Thermoclines Thermoclines are sharp differences in water temperature These are easily identified by the continuous nature of the return Second Returns When a...

Page 19: ...the unit is on POWER turns the unit off POWER can also be used to go directly into Simulator mode To enter Simulator with the unit powered off press and hold POWER for several seconds until a continuo...

Page 20: ...hich buttons are available for adjustment In menus that have several possible settings a range of adjustment indicator shows the total range available and the current setting Within the menu are the o...

Page 21: ...f the water Ranges of 0 15 0 30 0 60 0 120 0 180 0 240 0 350 0 480 and 0 600 are available In the metric version ranges of 0 5 0 10 0 20 0 40 0 60 0 80 0 110 0 150 and 0 185 meters are available The r...

Page 22: ...in view even in quickly changing terrain but is most useful in flatter areas without considerable depth variation Manual Zoom provides detailed information of any area from the surface to the bottom...

Page 23: ...distance traveled since the 300TX was powered up or reset the average speed the total time elapsed since power up or reset and the input voltage from your boat s electrical system The time speed and d...

Page 24: ...s on screen In this case smaller sonar returns are disregarded This is useful for eliminating many small sonar returns when seeking larger species of fish The 300TX remembers this selection even when...

Page 25: ...he bottom Selecting Bottom Black ON causes the unit to blacken in the display below the bottom This gives the user easiest recognition of the bottom location even from a great distance The 300TX remem...

Page 26: ...and surface water temperature sensors These accessory sensors can be purchased independently or together as a single sensor see the Humminbird Accessories catalog If the sensors are connected and work...

Page 27: ...ted directly to the 300TX or used in conjunction with the standard transducer through a transducer switch When used with a switch in conjunction with the Tri Beam transducer the 300TX recognizes which...

Page 28: ...e lens If your boat remains out of the water for a long period of time algae and other marine growth an reduce the effectiveness of the transducer Periodically clean the face of the transducer with li...

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