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Flush Mounting the Device

NOTICE

Be careful when cutting the hole to flush mount the device. There is only a small amount of clearance between the case and the mounting holes, and cutting the hole too large could compromise the stability of the device after it is mounted.

NOTICE

If you are mounting the device on fiberglass, when drilling the pilot holes, use a countersink bit to drill a clearance chamfer through only the top gel-coat layer. This will help to avoid cracking in the gel-coat layer when the screws are tightened.

NOTICE

Before cutting or drilling to flush mount the device, make sure there is at least approximately 185 mm (7 1/4 in.) of space behind the mounting surface to minimize strain on the cables and connectors on the back of the device.

NOTICE

Do not apply grease or lubricant to the screws when fastening the device to the mounting surface. Grease or other lubricants can cause damage to the housing.

  1. Trim the template and make sure it fits in the location where you want to mount the device.
  2. Affix the template to the mounting location using adhesive tape.
  3. Using a 10 mm (3/8 in.) drill bit, drill one or more starting holes on the corners of the cutout line indicated on the template.
  4. Using a jigsaw or rotary tool, cut the mounting surface along the solid line indicated on the template.
  5. Remove the template from the mounting surface and discard it.
  6. Place the device in the cutout to test the fit.
  7. If necessary, use a file and sandpaper to refine the size of the cutout.
  8. After the device fits correctly in the cutout, mark the locations of the pilot holes for the four mounting screws, using the device as a template.
  9. Remove the device from the cutout.
    NOTICE

    Do not drill the pilot holes into the mounting surface through the mounting holes on the device, to avoid damaging the device.

  10. Using a 2 mm (3/32 in.) drill bit, drill the pilot holes.
  11. Select an option:

    • If you are installing the device in a dry location, peel off the adhesive backing liner from the included foam gasket 1 and install it on the back of the device.


      Flush mount installation with callouts

    • If you are installing the device in a location that is exposed to water, do not install the included foam gasket.

      You must apply silicone-based marine sealant to the mounting surface immediately before securing the device to the mounting surface.

  12. If you will not have access to the back of the device after you mount it, connect all necessary cables to the device (Device Connections).
    NOTE: Make sure the weather cap is installed on any unused connectors, to prevent corrosion of the metallic contacts.
  13. If you did not install the self-adhesive gasket on the device, apply silicone-based marine sealant to the mounting surface around the cutout.
    NOTICE

    You should apply marine sealant only if you did not install the self-adhesive gasket. Using sealant and the gasket together may reduce water resistance.

  14. Place the device in the cutout.
  15. Secure the device to the mounting surface using the included screws.
    NOTICE

    Do not overtighten the screws. Overtightening the screws may damage the device or the mounting surface.

  16. Press the screw covers 2 into place, over the sides of the device.
GUID-60E76EAD-A560-449E-A528-6C89D9026DB3 v1
May 2026
© 2026 Garmin Ltd.