Gravity Ballast System

The optional Gravity Ballast System is an electronically controlled ballast system that can be operated from the driver’s seat. The Gravity system is available in a 1 or 3 position system. The switch panel to the 3 position system is located directly below the shifter mechanism, and the 1 position system is operated from a switch on the dash. Each switch allows independent filling and draining of each ballast container by simply hitting the fill or drain switch. If the system fails to fill or drain, you may check the resettable breaker on the switch panel, or the separate ballast fuse block located under the dash area. The ballast bags or tanks can be found in the front ski locker, under the rear seat, or in the rear v-drive storage areas depending on the the model and ballast system.

When bags begin to vent, shut off!

Do Not overfill ballast bags!

Care should be taken that the ballast bags are situated properly with the fill hose on top and drain hose on bottom and that all fittings are installed securely. The bags should not be twisted and the bags should be free to expand and drain completely. Care should be taken to prevent sharp objects from coming in contact with the bags. Cuts and punctures to the bags are not warrantable.

Each Gravity Ballast system also includes a manual shut off valve in case of emergencies. If closed, the valve will prevent any water from entering the system and is only used in emergency situations. Under normal use the valve should remain open to allow full flow of water into system.

Priming the System

To allow water into the system, the Gravity Ballast system utilizes a scooped intake strainer to force water into the system. This allows the ballast system to be filled while running or sitting still. If air becomes trapped in the system, it may be necessary to run the boat at planing speeds to force water into the system and allows the fill pump to prime fully. Once the pump has primed it is no longer necessary to run the boat for filling. This situation may occur if the boat is trailered.

DC Outlet

For your convenience, a DC outlet has been included on the panel to the right of the driver’s seat. Some models have receptacles located in the glovebox. Location varies by model.

© 2006 Skier’s Choice, Inc.

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Supra THE LOGO, SUPRA manual Gravity Ballast System, DC Outlet, Priming the System