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GARMIN echo™ 551dv Fishfinder

Model # 15094196Mfg # 010-01256-00


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Product Description

Fishfinding with Garmin DownVü Scanning Sonar

  • Garmin DownVü scanning sonar provides a nearly photographic view of fish and structure under the boat
  • Includes an all-in-one advanced HD-ID and DownVü transducer
  • 5-inch high-resolution VGA color display
  • Transmit power: 500W (RMS)
  • Includes quick-release tilt/swivel mount, transom mount and low-profile trolling motor transducer mounting kits

The echo 551dv is a premier fishfinder with an all-in-one transducer that delivers both advanced HD-ID 77/200 kHz and Garmin DownVü scanned images simultaneously on a horizontally or vertically split screen. The images provide the clearest possible fish arch returns and nearly photographic bottom/structure details under the boat. With its bright, crisp 5-inch high-resolution VGA color display, the echo 551dv has Smooth Scaling which provides smooth transitions from shallow to deep water and back again. Narrow-to-wide viewing cone angles give you a big picture well beyond the sides of your boat - from shallow water down to 2,300 feet maximum. Also includes sonar history rewind and 500W (RMS) power. Quick-release tilt/swivel mount plus transom and low-profile trolling motor transducer mounts make installation a snap.


Physical & Performance

  • Unit dimensions, WxHxD: 6.0" x 5.9" x 1.8" (15.2 x 15.0 x 4.6 cm)
  • Display size, WxH: 2.9” x 4.0” (7.4 x 10.16 cm); 5” diag, (12.7 cm)
  • Display resolution, WxH: 480 x 640 pixels
  • Display type: VGA color
  • Weight: 17.6 oz (500g)
  • Waterproof Rating: IPX7

Features & Benefits

  • Audible alarms: Yes
  • Dual-frequency (50/200 kHz) sonar capable: Yes
  • Dual-beam (77/200 kHz) sonar capable: Yes
  • Split-screen zoom: Yes
  • Ultrascroll (displays fish targets at higher boat speeds): Yes
  • Fish Symbol ID (helps identify fish targets): Yes
  • AutoGain Technology (minimizes clutter, maximizes targets): Yes
  • Whiteline (indicates hard or soft bottom): Yes
  • Adjustable depth line (measures depth of underwater objects): Yes
  • A-scope (real time display of fish passing through transducer beam): Yes
  • Bottom lock (shows return from the bottom up): Yes
  • Water temperature log and graph: Yes
  • Water temperature sensor included: Yes
  • Water speed capable (displays speed on water): Yes

Other Specs

  • Frequencies supported: 50/77/200 kHz, DownVü
  • Transmit power: 500W (RMS)
  • Voltage range: 10-28 Vdc input
  • Maximum depth: 2300 ft @ 77 kHz, freshwater
    (Maximum depth dependent on transducer, water, salinity, bottom type and other water conditions.)
  • Additional: HD-ID Tracking Technology, Sonar History Rewind

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by PowerReviews
Garmin Echo 551dv Fishfinder

(based on 1 review)

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Reviewed by 1 customer

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Stay away

By Branick

from Juno Beach

About Me Casual/ Recreational


  • Don't know


  • Bad Transducer Design

Best Uses

  • Don't know

Comments about Garmin Echo 551dv Fishfinder:

I have always been a Garmin fan and user. I currently have 6 different Garmin devices and love them all but this one. The 551 DV. It's really not the device itself but the transducer. Unfortunately this transom mount transducer is the one you are going to get with all there downvu and sidevu units if you want to go with a transom mount. I understand there's different technologies in them but the shape design and mounting bracket are the same. I mounted the transducer as per the instructions, got good readings but I had a huge rooster tail that just engulfed my motor. I talked to some electronic guys and they said it was too low. So I started raising it and the rooster tail got better but never went away but as I raised it my readings got worse. I started doing some research and found that people that where having the same problem put splash guards on them witch doesn't seem acceptable to me. I called Garmin several times about this issue and they recommended different mounting brackets, one for the bottom of a latter and one on the engine mount witch would mean I couldn't use while moving. That was not a possibility. The third option was a through hull mount. Ok, then I found out they start at $450. Even though I feel comfortable mounting transom mounts the through hull I would want someone who knows what they're doing and that would be at least another $300. I haven't had my unit for 60 days yet and now find myself shopping different brands. I am currently looking at the new Lowrance Elite 5x chirp witch is $550. I would save money getting it and have more technology because it has chirp witch the 551 DV does not. I plan on throwing the 551 DV in the trash because I wouldn't even give it away. All I am saying is stay away from there downvu and sidevu transom mount transducers!

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