Garmin Fishfinder 90
Best Seller! The Garmin Fishfinder 90 wraps simple operations and Garmin’s exclusive fishfinder technology into an entry-level sonar. It’s perfect for any vessel where space is at a premium. Dual-beam transducer operation gives you better shallow-water performance. The wide viewing angle (60°) lets you see fish even off the sides of the boat.
With a basic black-on-white display, the Fishfinder 90 has one of the sharpest screens for the money.
The Fishfinder 90 also offers Ultrascroll™ which allows boaters to get a much faster refresh rate on their sonar display. AutoGain, as well as user adjustable gain, is also standard on all of Garmin’s new fishfinders.
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Garmin Fishfinder 90 Specifications
- Black-and-white FSTN display, 2.2” W x 3.2” H, 4-inch diagonal, 64 x 128 pixels
- Patented transom/trolling mount transducer
- Dual-beam transducer with user-selectable narrow (14°) or wide (45°) view to see more fish in shallow water
- Ultrascroll™ high-rep-rate sonar
- Automatic display re-scaling on range change (no more vertical lines with range changes)
- New AutoGain technology to see more fish
- New sounder design featuring excellent shallow-water performance
- Incandescent backlight for display and keypad
- Power output: 100 watts (RMS) 800 watts (peak to peak)
- Depth: 600 foot
- Unit dimensions: 4.72” W x 4.94” H x 2.43” D
- See-Thru technology: shows weak and strong returns simultaneously
- Power down backup of settings: customer settings are not lost when the unit is turned off
- Whiteline
- 2X and 4X automatic and manual zoom
- Alarms for fish size, shallow water, deep water, low battery
- Battery voltage indication
Garmin Fishfinder 90 Screenshots

Garmin Fishfinder 90 Review
Improve your fishing and boating with tips from
Fishing legend and two-time Bassmaster Classic winner Hank Parker knows quality electronics can help you put more fish in the boat. Hank is a 20-year veteran of the professional fishing ranks, and he's an integral part of our product development at Garmin.
The features he suggests here can help you win the tournament or just turn a day of fishing into a day of catching! We're proud to have Hank as part of the Garmin team.
Garmin Fishfinder 90 Accessories
Garmin Plastic Transom Mount Transducer 20 Deg***010-1010-500
Plastic, transom mount transducer with depth and temp. Operating frequency of 200 and 50 kHz. Beamwidth of 10 degrees at 200 kHz, 40 degrees at 50 kHz. Transducer kit comes with mounting hardware and installation instructions.
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