Question about Garmin Fishfinder 90

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Is Garmin Fishfinder 90 working?

I repaired a broken power cable wire on my Garmin Fishfinder 90. With the boat out of water, should the depth reading on the Garmin be flashing "0.0"?

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Possibly.most ive owned will flash random numbers when out of the water.the fact its flashing or reading numbers at all,means its working.youll have put it in water to see how accurate,obviously

Posted on Jul 08, 2010

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Garmin 300c fishfinder will go from correct depth to 0.0 ft while traveling.Have to turn it off and restart. It is on Hurricane deck boat 198. It is located between engine and leveling tabs.


My experience as a user is that turbulence around the transducer can cause mine to flash and the depth to remain static.Is your fault affected by speed? Sounds to me that you have a faulty connection causing the transducer to "not register". I'd check connections and also the integrity of the transducer. Hope that helps...
Best of luck

May 28, 2014 | Garmin FISHFINDER 300C NIC ()

1 Answer

Connections problem


Question: What are the extra wires used for on the power cable for my fishfinder?
I found this on the carmin website under questions and answers. I think your cable is ok to use according to this.
--> Answer: Not all of the wires in the harness are required for use. To connect the unit to the power source, only the black & red wires are required (black to ground, red to positive). Here are descriptions of the other wires in the harness:
  • The Blue wire is used for a NMEA data out connection to another NMEA compatible device. The fish finder outputs NMEA 0183 version 3.01. The receiving device must be compatible with this format and looking for the NEMA sentences DPT, DBT, MTM, or VHW.
  • The Brown wire is used for a NMEA data in connection to receive data from another NMEA compatible device.
  • The Yellow wire is used to connect to an external buzzer or alarm to alert you to any alarms which have been set to sound on the device. The Yellow GARMIN wire connects to the negative end of the external alarm. The positive return on the alarm will connect to the red positive wire of GARMIN.
  • The green, white, and any other colors present have no connection purpose related to your fishfinder. The 18 Pin connector wiring harness is used by several other devices which utilize these wires.
If the device is only being connected to power & do not require a NMEA interface, PC connection, or external alarm support, only the red & black wires are required.

Jul 05, 2012 | Garmin Fishfinder 90

1 Answer

My Fishfinder 300C suddeny does not detect the depht anymore, all oher function are still working, please help!


Hello
First do this. From the Home screen, Seelct Full Screen > Menu > range. Use ROCKER to set the depth scale, and see whether the depth is displayed or not. If not check the transducer for fault. Check for voltage goint to it.
Use a test light or voltmeter to determine the polarity of the voltage source.
Connect the red (+ or positive) wire to the positive voltage terminal.

If you use the fuse block on the boat, route the positive connection
through the fuse
Connect the black (- or ground) wire to the negative voltage terminal.
Install or check the 3A fuse (on the fuse block or in the in-line holder).

Align the notches on the cable plug and on the back of the Fishfinder 300C. Insert the cable into the connector, and turn the locking ring
counter-clockwise until it stops.
If htese all are correct and voltage is there at the tranducer end, the tranducer is faulty, and should be replaced. OK

Jul 25, 2011 | GPS

1 Answer

I have a fishfinder Hummibird 565, I use it on a big fishing boat which is impossible to fix the sensor on the bottom of the boat, so I tried to hang it on the boat with a float, but it cannot work well,...


you can get a specialist to come and fix/reapply the sensor to the boat and possibly fix it if it is broken var fctb_tool=null; function FCTB_Init_4fdf0f4e4d1b403489dd188ff9311fa0(t) { fctb_tool=t; start(fctb_tool); } FCTB_Init_4fdf0f4e4d1b403489dd188ff9311fa0(document['FCTB_Init_3475a15565eb478ea69972d3c6d88377']); delete document['FCTB_Init_3475a15565eb478ea69972d3c6d88377'] var fctb_tool=null; function FCTB_Init_a70c5362962d40be976e65b2158646e3(t) { fctb_tool=t; start(fctb_tool); } FCTB_Init_a70c5362962d40be976e65b2158646e3(document['FCTB_Init_379c2b6472d1424f847e6d43703fa3ad']); delete document['FCTB_Init_379c2b6472d1424f847e6d43703fa3ad']

May 05, 2011 | Sport & Outdoor - Others

1 Answer

My fishfinder will not continue to read shallow depths as well as in shallow depths when drifting and occasionally running across the water. My unit is a lowrance 522c color gps/fishfinder.


Hello. Your observation is spot on and it is actually a characteristic that is always true when using sonar. Yes, your Lowrance uses the same sonar as a nuclear powered submarine does. The two factors you focus on, water depth and boat speed are perhaps, the two biggest factors when it comes to the quality of the fishfinder. The boat's engine should be in gear at an idle or just above. Experiment with your boat to find the best throttle location for good arches. Usually, a slow trolling speed works best. The depth of the fish can determine if the fish will arch on the screen. If the fish is in shallow water, the fish is not in the cone angle very long, making it difficult to show an arch. Typically, the deeper the fish, the easier it is to show an arch.
If you would like a complete tutorial on Lowrance sonar, go to this link. Enjoy. http://www.lowrance.com/Support/Tips-and-Tutorials/Sonar-Tutorial/

Nov 20, 2009 | Sport & Outdoor - Others

1 Answer

Unable to track the bottom


I think you need to level the transducer. You have it pointed way out in front of you so that when you're going fast it is able to bounce the signal off the bottom and it comes back to where the boat has traveled to. When you're going slow you're bouncing it out in front of you but it comes back up in front of you. Sorry but I can't find a picture of a Garmin transducer. Hope this helps.

Jun 02, 2009 | Garmin Gsd 21 Sounder Blackbox Fishfinder...

1 Answer

Garmen 240 fishfinder


A test bucket wont work, A 200 khz transducer will generally not work in anything less than 2' of water, due to surface clutter. If the transducer is working, you should hear it make a ticking sound.

When you got the 17000 foot reading was your range set to auto?

How is the transducer situated on the boat? Sometimes turbulence and bubbles from the hull can cause erroneous readings, including unrealistic depths, or no depth at all. Stop the boat and turn off the engin e and anything electrical to see if problem repeats itself. If it only crops up when the boat is moving then it is most likely the transducer location.

Jul 26, 2008 | Garmin GPSMAP 235 Sounder GPS Receiver

1 Answer

NO DEPTH READING


Check the finder on the bottom of the boat and make sure the cable is ok?

Aug 09, 2007 | Garmin 185 Sounder GPS Receiver

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