Pontoon boats give you plenty of room for fishing, but that extra size can make choosing a fish finder slightly different from outfitting a kayak or small jon boat.
You usually sit farther away from the electronics, so a tiny 4-inch screen can become difficult to read.
You may also cover larger lakes, troll for long periods, or fish with several people on the boat, which makes GPS, mapping, and a larger display much more useful.
Side imaging can also be especially helpful because a pontoon covers a lot of water and you do not always want to drive directly over every piece of structure before fishing it.
I checked the current Amazon-ready options and selected fish finders that make sense specifically for pontoon boats rather than simply choosing the most expensive electronics available.
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Quick Comparison
| Fish Finder | Best For | Screen | Main Advantage |
|---|---|---|---|
| Garmin ECHOMAP UHD2 73sv | Best Overall | 7" | SideVü + mapping |
| Humminbird HELIX 7 MEGA SI GPS G4 | Best Imaging | 7" | MEGA Side Imaging |
| Lowrance Eagle 9 TripleShot HD | Best Large Screen | 9" | SideScan + 9-inch IPS |
| Garmin STRIKER Vivid 7sv | Best Value | 7" | SideVü without premium price |
| Humminbird HELIX 5 CHIRP GPS G3 | Best Compact Option | 5" | GPS + mapping in less space |
Best Fish Finders for Pontoon Boats
A pontoon gives you more mounting space than a kayak or jon boat, so I would normally look for at least a 7-inch screen if the budget allows.
The main things that matter are:
- Screen visibility from your seating position
- GPS and mapping
- Side imaging
- Transducer cable length
- Easy waypoint marking
- Enough screen space for split views
If your pontoon is smaller and you do not need a large display, our Best Fish Finder for Small Boats has several more compact choices.
1. Best Overall Fish Finder for Pontoon Boats: Garmin ECHOMAP UHD2 73sv
The Garmin ECHOMAP UHD2 73sv is the one I would choose if you want a fish finder that can handle both finding fish and navigating larger lakes.
Its 7-inch touchscreen is large enough to run sonar and mapping together without everything becoming difficult to read from the captain's seat.
The included GT54 package gives you traditional CHIRP, ClearVü, and SideVü.
SideVü is especially useful on a pontoon because you can scan structure away from the boat rather than repeatedly driving directly over it.
You also get Garmin Navionics+ inland mapping and Quickdraw Contours for creating your own maps.
The 73sv remains available through Amazon in bundles with the GT54 transducer, so make sure that is the version you link rather than a control-head-only package.
Special features:
- 7-inch touchscreen
- Traditional CHIRP sonar
- ClearVü
- SideVü
- Garmin Navionics+ maps
- Quickdraw Contours
- Built-in GPS
2. Best Imaging: Humminbird HELIX 7 MEGA SI GPS G4
If your main goal is seeing structure clearly, the HELIX 7 MEGA SI GPS G4 is hard to ignore.
Its MEGA Side Imaging can show much finer detail than basic side scanning sonar.
That is useful when you are trying to identify brush piles, submerged trees, rocks, dock structure, or isolated cover away from the pontoon.
You also get MEGA Down Imaging and Dual Spectrum CHIRP for looking directly underneath the boat.
Humminbird includes internal GPS, its Basemap, and AutoChart Live for creating your own contour maps as you drive.
The current G4 model remains in Humminbird's lineup and Amazon-oriented 2026 listings continue to carry it.
Special features:
- 7-inch display
- MEGA Side Imaging
- MEGA Down Imaging
- Dual Spectrum CHIRP
- Built-in GPS
- Humminbird Basemap
- AutoChart Live
3. Best Large Screen: Lowrance Eagle 9 TripleShot HD
A 9-inch screen makes a lot more sense on a pontoon than it does on a small kayak.
You have more room to mount it, and the bigger display is easier to see when you are sitting farther from the console.
The Eagle 9 TripleShot HD combines wide-angle CHIRP, DownScan Imaging, and SideScan.
FishReveal also helps separate fish from underwater structure.
The IPS screen has wide viewing angles, which is useful when several people are standing around the console trying to see the sonar at once.
Current Amazon listings include the Eagle 9 TripleShot HD packages, including versions with C-MAP charting.
Special features:
- Large 9-inch IPS screen
- SideScan
- DownScan Imaging
- CHIRP sonar
- FishReveal
- Genesis Live mapping
- GPS
4. Best Value Pontoon Fish Finder: Garmin STRIKER Vivid 7sv
If you want a large display and side imaging without paying for a more expensive chartplotter, the STRIKER Vivid 7sv makes a lot of sense.
It has the same useful 7-inch screen size but focuses more heavily on sonar.
The included transducer supports traditional CHIRP, ClearVü, and SideVü.
That gives you plenty of underwater information for locating fish and structure around a pontoon.
You still get GPS, waypoint marking, and Quickdraw Contours.
What you do not get is the detailed preloaded mapping found on the ECHOMAP series.
The STRIKER Vivid 7sv remains a strong Amazon seller and continues to appear in current 2026 Amazon-focused fish finder guides.
Special features:
- 7-inch display
- SideVü
- ClearVü
- Traditional CHIRP
- Built-in GPS
- Quickdraw Contours
- Good value for the screen size
5. Best Compact Pontoon Fish Finder: Humminbird HELIX 5 CHIRP GPS G3
Not every pontoon needs a 7-inch or 9-inch display.
If your console is small or you mainly want sonar, GPS, and mapping without spending a lot of money, the HELIX 5 CHIRP GPS G3 is a good alternative.
It uses Dual Spectrum CHIRP with Wide and Narrow modes, so you can search a larger area before focusing on individual targets.
GPS, Humminbird Basemap, and AutoChart Live are also included.
Amazon sales data from July 2026 showed the HELIX 5 CHIRP GPS G3 among the stronger-selling branded fish finders in the category.
Special features:
- 5-inch color screen
- Dual Spectrum CHIRP
- Built-in GPS
- Humminbird Basemap
- AutoChart Live
- Compact console footprint
You might also like these posts:
- Best Fish Finder for Small Boats
- Best Fish Finder Under $500
- Best Fish Finder With Side Imaging Under $500
Conclusion
A pontoon boat gives you enough room to take advantage of a larger fish finder without overcrowding your console.
The Garmin ECHOMAP UHD2 73sv is the best overall choice because it combines side imaging, GPS, and proper mapping.
If underwater structure is your main priority, the Humminbird HELIX 7 MEGA SI GPS G4 gives you even more detailed side imaging.
