Helm Guardian Adapter Plate | Garmin 5212 to Garmin 1243xsv
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Helm Guardian
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Upgrade Your Helm Without Cutting a New Hole
The Helm Guardian Adapter Plate HEL-ADP-GAR5212-1243 lets you mount a Garmin GPSMAP 1243xsv into an existing Garmin GPSMAP 5212 helm cutout — in many cases, no fiberglass cutting is required, no mess. Hardware is included to attach the adapter plate to your dash where required.
Precision laser-cut from 3/16" black acrylic — glossy on one side, matte on the other. Both sides are symmetrical, so either face can be used. Laser-engraved with the part number and installation notes directly on the face.
Specifications
- Outer Plate: 13.1" W × 9.7" H (332.7 × 246.4 mm)
- Display Cutout: 11.7" W × 8.0" H (297.2 × 203.2 mm)
- Plate Mounting Holes: 4× Ø 0.182" (4.6 mm) — corner positions for securing adapter to helm
- Display Mounting Holes: 4× Ø 0.126" (3.2 mm) — for attaching display to adapter plate
- Standard Thickness: 3/16" black acrylic, glossy one side / matte other side (symmetrical). Note: some installations use 1/8" thickness when the display sandwiches the plate in place and corner holes are not required.
- Made in: Stevensville, MD — USA
Fits
Garmin GPSMAP 1243xsv into an existing Garmin GPSMAP 5212 helm cutout.
Installation Note
Hole sizes are precision laser-cut starting points. If your hardware requires slightly larger holes, enlarge carefully with a drill. The part number and this note are laser-engraved on the plate for your installer's reference.
Why BOE Marine?
We've been installing marine electronics on the Chesapeake Bay and beyond since 2001. Helm Guardian adapter plates are designed by our installation team — the same people who build and install these systems every day. If it doesn't work perfectly, we'll make it right.
Questions? Email sales@boemarine.com or call 443-458-4258.
Can't find the adapter you need? Make your own using our Builder
| Brand | Helm Guardian |
| Fits | Garmin |
| From | Garmin |
| To | Garmin |
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BOE Marine is the premier choice for Marine Electronic sales, installation, and service in Maryland, North Carolina and Florida. We are an authorized dealer for all major brands, specializing in electronics, safety, navigation, entertainment, communications, and much more.
At BOE Marine, we specialize in providing top-tier marine electronics solutions for boaters, anglers, and yachting enthusiasts nationwide. Our team of certified marine electronics technicians delivers expert installation, troubleshooting, and support for cutting-edge systems including radar, sonar, chartplotters, GPS navigation, autopilot, marine audio, and communication equipment. Whether you’re upgrading your fishing vessel with tournament-ready technology, outfitting a luxury yacht with advanced connectivity, or simply need reliable repairs, BOE Marine offers the knowledge and precision to keep your time on the water safe and enjoyable.
Beyond installations, we are a trusted source for marine electronics sales and consultation. Our extensive online store features products from leading brands such as Garmin, Simrad, Raymarine, Furuno, and JL Audio, ensuring customers have access to the latest innovations in boating technology. We provide personalized guidance to help boat owners select the right gear, backed by competitive pricing and expert advice. From single-component upgrades to complete vessel electronics packages, BOE Marine is your one-stop partner for all things marine electronics.
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