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Garmin Echo 100 Review

Garmin Echo 100 has an average rating of 3.8 out of 5 based on 5 user reviews.



When it comes to selecting the perfect fishfinder for all your fishing needs, value is everything. This is where the Garmin Echo 100 comes into play, as a strong fishfinder packed with all the important functionality but nevertheless light on both the frills and your wallet. The benefits of the Echo 100 start with its crisp 4 inch display (with a pixel resolution of 160 x 256 and an 8 level grayscale FSTN screen) and quickly extend to include its single 200kHz beam transmitter, which brings up details hidden under as many as 600 feet of fresh water. There is a significant amount of sonar power in that beam (100 watts).

Because of the compact sizing, the Garmin Echo 100 is perfect for small to mid-sized boats and will not crowd your limited space. Everything you need comes in the box, including the fish finder itself, a tilt and swivel mount, all the proper power cables, transducer and instructions. This makes installation a very easy matter, once again saving you time. What this fishfinder lacks in flashy features, it makes up for in reliable, efficient performance, speed and of course, excellent value.

You can get a great deal on Garmin Echo 100 here.

 Garmin Echo 100Humminbird PiranhaMax 143Humminbird PiranhaMax 153
Screen Size4 in / 102 mm4 in / 102 mm4 in / 102 mm
Screen Resolution160 x 256 pixels160 x 128 pixels160 x 128 pixels
Display Type8-level grayscale FSTN4-level grayscale4-level grayscale
Transmit Power100W RMS
800W Peak-To-Peak
100W RMS
800W Peak-To-Peak
100W RMS
800W Peak-To-Peak
Sonar Frequency200 kHz200 kHz83/200 kHz
Maximum Depth600 ft600 ft600 ft

User Reviews

Posted by JonBoater

  • 1/5

I expected that a $80 fishfinder will not require much to install. Turns out I was wrong. You have to put holes in the boat to attach it and then hardwire it to the battery. Not exactly what I wanted to do so I returned to the store, and bought a portable Piranhamax instead.

Posted by Scott

  • 5/5

To install the transducer, all you have to do use a plastic mounting block and use to epoxy the transducer to the hull, what’s the big fuss about in the previous review. Garmin Echo 100 is great. It stays on the bottom at 25 mph and the display is crisp and clear.

I used to own a $400 Humminbird that never worked right and eventually stopped working at all. I also own several Garmin products, they are all high quality and reliable.

Posted by RickV

  • 4/5

I don’t think you can buy anything better at this price. It has all the necessary fishfinder functions: depth, temperature, it shows structure and fish, it has fish alarms. It uses very little power and it’s accurate for the most part (occasionally it shows incorrect depth for about 30 seconds or so).

Posted by Gerald

  • 4/5

I’m using this as a depth finder only. It seems to be very accurate when it comes to depth, it also shows nice outline of the bottom. I sometimes get incorrect returns when I have the power on auto, I turn the gain down and that seems to always solve the problem.

Posted by George Cambell

  • 5/5

I thought this Garmin product was very great, as it’s price says. It stayed on the back of the boat at around 50 miles per hour using only epoxy to hold it on. If your looking for a good fish finder for your boat at an affordable price, this would be it.

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