Overview

The Garmin 010-10921-00 is a swivel mounting bracket for surface-mounting compatible GPSMAP 500 Series chartplotters and the GXM 31 receiver at the helm. It fits GPSMAP 520/520s, 521/521s, 525/525s, 526/526s, 530/530s, 531/531s, 535/535s, 536/536s, 540/540s, 541/541s, 545/545s, and 546/546s.

This bracket is a practical choice when you want a GPSMAP 5xx display on top of the dash, on an electronics box, or on a flat panel where you can rotate the unit to manage glare and sight lines. It is also useful as a direct replacement when an existing bracket is worn, cracked, or missing on an older install.

Key features

• Surface-mount swivel bracket for Garmin GPSMAP 500 Series chartplotters and the GXM 31 receiver
• Compatibility with GPSMAP 520/520s, 521/521s, 525/525s, 526/526s, 530/530s, 531/531s, 535/535s, 536/536s, 540/540s, 541/541s, 545/545s, and 546/546s
• Swivel action helps you angle the unit toward the helm, a standing position at the console, or a second viewing spot
• Mounting style suits flat dash tops and electronics box lids where you want the display raised off the surface
• Good option for refits where you want to keep an existing GPSMAP 5xx system but refresh the mounting hardware

Compatibility and fit

This bracket is intended for GPSMAP 5xx units listed above and the GXM 31. If your display is outside the GPSMAP 500 Series, check the model number on the front bezel or the system information page and match it to the supported list before ordering.

Plan the mounting spot so the unit can rotate without hitting a windshield frame, grab rail, or nearby switches. Also leave room behind the unit for cable bend radius and for accessing connectors during service.

Installation and setup

Mount the base on a flat surface that stays rigid when the boat is running. On thin fiberglass or plastic panels, a backing plate or large washers help spread the load and keep the mount from working loose over time.

Seal any new screw penetrations in the console to keep water out of the core, and route power and transducer cables so they do not chafe when the unit is rotated. A gentle service loop behind the display usually makes adjustments and maintenance easier.

Use on board

This bracket works well on center consoles, small wheelhouses, and older integrated helms where a GPSMAP 5xx display needs to be angled for a seated operator and then swung toward someone standing at the console. It is a good match for anglers and cruisers maintaining a proven GPSMAP 500 Series setup and wanting a clean, adjustable mounting position.

Maintenance and care

Rinse salt spray off the bracket during washdowns and keep the pivot area free of grit that can make rotation feel rough. Periodically check mounting screws for tightness, especially after the first few runs and after any heavy-weather pounding.