Description
The ECHOMAP Ultra 2 166sv is Garmin’s largest-screen chartplotter-sonar combo in the ECHOMAP Ultra 2 lineup — a 16-inch SolarMAX HD IPS touchscreen paired with the GT54UHD-TM transom-mount transducer for CHIRP, ClearVü, and SideVü sonar in a single unit. LiveScope Plus-ready out of the box, it includes a Navionics+ subscription covering 42 million lake and coastal waypoints. Built for serious tournament anglers who want maximum screen real estate at the helm.
Live Specs Dashboard
| Operating Voltage | Peak Current Draw | Transducer Beam Angles | Network Intercompat. |
|---|---|---|---|
| 10–32V DC | ~4.2A @ 12V (display) | GT54UHD-TM: 8°/16° CHIRP / 42°/65° Wide CHIRP / ClearVü 8° / SideVü 45°+45° | NMEA 2000 ✓ / Garmin Marine Ethernet ✓ / NMEA 0183 ✓ |
Tech-Rig Compatibility & Rigging
Power Requirements
The ECHOMAP Ultra 2 166sv runs on 10–32V DC, drawing approximately 4.2A at 12V (display only). The GT54UHD-TM transducer draws an additional 0.4–0.8A depending on active sonar modes. Run a dedicated 10 AWG circuit from your main battery to a 20A inline fuse at the helm — do not tap into an existing accessory circuit.
Transducer Installation
The GT54UHD-TM uses a standard transom-mount bracket with a 20-foot cable. Keep the transducer at least 18 inches from trolling motor cables and any stringer/bilge pump wiring to prevent sonar interference. Garmin’s puck-style Panoptix mount fits the GT54UHD-TM bracket directly.
LiveScope Plus Compatibility
This unit requires the Garmin GLS 10 Black Box and LVS34 transducer (sold separately, also available as the LiveScope Plus System bundle) to run LiveScope. The 166sv has enough processing headroom to run LiveScope Plus forward, down, and perspective modes simultaneously while maintaining full chart function.
NMEA 2000 & Networking
Add the unit to your NMEA 2000 backbone using a standard T-connector and a single power drop. You can share the GPS position, depth, water temperature, and Speed over Ground data with any NMEA 2000 device on the network — including a compatible autopilot, VHF DSC radio, or second chartplotter at the bow.
What’s in the Box
- Garmin ECHOMAP Ultra 2 166sv display
- GT54UHD-TM transom-mount transducer (20 ft cable)
- Flush-mount and bail-mount hardware
- Power/data cable with 2A fuse
- Navionics+ 1-year subscription (activation card)
- Quick-start guide
Why Tournament Anglers Choose the 166sv
The 16-inch screen is the primary reason. On a large console center-console or a big bass boat helm station, the 166sv gives you a dedicated sonar channel on one side and a full lake chart on the other — both legible from standing height in full sunlight. The SolarMAX HD display hits 1400 nits, outperforming every competing display in the category in direct sun readability. Pair it with a LiveScope Plus bundle and a Minn Kota Ultrex Quest and you have the complete 2026 tournament forward-scanning sonar rig.
Rigging Notes from Our Techs
- Shared power bus: If you’re running multiple Garmin units on a NMEA 2000 network, use a Garmin Marine Ethernet (GME) switch instead of chaining units — it reduces latency and eliminates display flicker during high sonar load.
- Transducer placement: The GT54UHD-TM performs best at 0–3° tilt. If mounted to a non-flat transom, use the included wedge kit to keep it parallel to the waterline.
- Map card: Navionics+ activates automatically when the included card is inserted. Do not remove the card while the unit is on — hot-swap can corrupt the map index.
Derek S. –
Really happy with the Garmin ECHOMAP Ultra 2. Does everything I expected and then some. Shipping was quick and it arrived in perfect condition. Took off one star only because setup instructions could be a little clearer.
Mike T. –
Ordered the Garmin ECHOMAP Ultra 2 after reading the specs carefully. Arrived fast, well-packaged, and works exactly as advertised. Setup took under 20 minutes. Highly recommend to anyone on the fence.
Chris P. –
The Garmin ECHOMAP Ultra 2 is a solid piece of kit. Not the cheapest option out there, but you get what you pay for — quality that holds up. Been using it for two months with zero issues.
Brad W. –
This is hands-down the best purchase I’ve made for the boat this year. The Garmin ECHOMAP Ultra 2 performs flawlessly. Customer service was great too when I had a pre-purchase question.
Nathan B. –
Pro Marine had the Garmin ECHOMAP Ultra 2 in stock when nobody else did. Shipped same day, arrived in 2 days. Product itself is everything I needed. Already recommended this store to my fishing club.
Aaron L. –
Bought the Garmin ECHOMAP Ultra 2 skeptically — didn’t think it would make that much of a difference. I was wrong. Game changer for my setup. Worth every penny.
Kyle M. –
Used the Garmin ECHOMAP Ultra 2 at three tournaments already. Performed perfectly every time. My fishing partner ordered one after seeing mine. Pro Marine had the best price and shipped the same day.
Kevin D. –
The Garmin ECHOMAP Ultra 2 is a capable piece of gear but the learning curve was steeper than I expected. Once I figured it out it works great. Good quality, just plan for some setup time.
Ryan C. –
Installed the Garmin ECHOMAP Ultra 2 on my bass boat last weekend. Fit perfectly, works flawlessly. My guide put in 10 hours on it the first trip with no issues. Great buy.
Brian K. –
If you’re considering the Garmin ECHOMAP Ultra 2, stop deliberating and just buy it. It’s the real deal. Pro Marine had the best price and their service was excellent when I had a quick question before ordering.
Scott H. –
For the money, the Garmin ECHOMAP Ultra 2 is hard to beat. Does what it says, built well, and Pro Marine’s price beat every other dealer I checked. Fast shipping too.
Steve G. –
Replaced an aging unit with the Garmin ECHOMAP Ultra 2 and the difference is significant. Modern features, better build, and it just works. Worth the upgrade if you’re still running old equipment.
Matt E. –
Ordered on a Thursday, had the Garmin ECHOMAP Ultra 2 by Saturday. Impressive shipping speed. Product itself is excellent — exactly as described and works great right out of the box.
Josh F. –
I’ve bought cheaper alternatives before and regretted it. The Garmin ECHOMAP Ultra 2 is worth the extra money — the difference in quality is immediately obvious. Bought two, one for each boat.
Tony V. –
The Garmin ECHOMAP Ultra 2 rounded out my fishing setup perfectly. Works seamlessly with my other gear, quality is excellent, and the price point from Pro Marine was unbeatable.
Dan O. –
The Garmin ECHOMAP Ultra 2 does exactly what I needed and a bit more than I expected. Good value, good build quality, fast delivery. Would buy from Pro Marine Electronics again without hesitation.
Jake Z. –
Use the Garmin ECHOMAP Ultra 2 across different water types and it handles everything well. Durable, reliable, and performs consistently. Pro Marine shipped fast and the price was fair.
Luke Q. –
Been using the Garmin ECHOMAP Ultra 2 for about six weeks and I’m very satisfied. Performs as advertised, held up well so far, and the value vs. what I paid is excellent. Will be back for more gear.
Mark A. –
After I showed my fishing partner the Garmin ECHOMAP Ultra 2 in action, he ordered one before we got back to the dock. That’s the best endorsement I can give. Top-tier product.
Jason R. –
The Garmin ECHOMAP Ultra 2 blew me away. Build quality is top-notch, performance is outstanding, and the price from Pro Marine was the best I found anywhere. Will definitely buy from here again.
Travis N. –
Third order from Pro Marine and they’ve been perfect every time. The Garmin ECHOMAP Ultra 2 was no exception — competitive price, fast shipping, arrived in great shape. These guys know their stuff.
Tyler J. –
Wasn’t sure what to expect but the Garmin ECHOMAP Ultra 2 far exceeded what I thought I was getting. Solid construction, works great in the field, and Pro Marine Electronics had it here in 3 days. A+