RAM Double Ball Mount for Garmin GPSMAP Setup

Quick answer

The RAM Double Ball Mount with Universal Hardware (RAM-B-101-G1U) provides a stable, adjustable platform for Garmin GPSMAP units. Follow these steps to mount it correctly and avoid common alignment issues.

Installation Steps

1. Attach the first ball plate to your mounting surface: Use the included stainless steel hardware to secure the first 2.5" round plate to a flat, clean surface on your boat console or dash. Pre-drill pilot holes to prevent cracking. Tighten bolts evenly, but do not overtighten—this can strip the threads. Overtightening is a common mistake; use hand-tight plus a quarter turn.
2. Connect the B-size arm to the ball plate: Press the ball socket on one end of the medium-length B-size arm onto the installed ball plate. Ensure the socket snaps fully into place. A partial snap can cause the arm to release under vibration. Always test the snap by gently pulling the arm; it should not detach.
3. Attach the second ball plate to your Garmin GPSMAP unit: Align the second 2.5" round plate with the AMPS hole pattern on the back of your GPSMAP. Use the supplied machine screws and washers to secure it. Do not use screws longer than the mounting depth—they can damage internal components. Check screw length against your GPSMAP manual; too-long screws can puncture the housing.
4. Snap the GPSMAP unit onto the arm: Press the second ball socket (on the other end of the arm) onto the plate now attached to your GPSMAP. Rotate the knobs to adjust viewing angle. Tighten knobs fully to prevent slippage in rough water. Loose knobs are the top cause of drooping displays; tighten until snug.
5. Route and secure cables: Use zip ties or cable clips to route the transducer and power cables away from the mount arm. Cables left loose can catch on the ball socket and dislodge the mount. Leave a small service loop near the unit to allow tilt adjustments without pulling cables tight.

Product Facts

• RAM® Double Ball Mount with Universal Hardware for Garmin GPSMAP + More: The RAM-B-101-G1U consists of a medium length B-size arm with two 2.5" diameter round plates with universal AMPS hole pattern and the hardware needed to attach a Garmin StreetPilot III or a Garmin GPSMAP 172-250. The medium arm length balances reach and stability, making it suitable for most boat consoles without excessive vibration.