Supra/Moomba Gravity III Ballast System Upgrade

Supra/Moomba Gravity III Ballast System Upgrade


More on the way - Expected soon


Warranty 2 Years
Manufacturer WakeMAKERS - view brand page
Manufacturer Part # 42103
Item # 42103


A complete upgrade for solves all of the issues of the 2002-2008 Moomba and Supra boats equipped with the Gravity III factory ballast system.


Unfortunately, it's well known that the factory Gravity III ballast system installed in 2002-2008 Moomba and Supra boats has numerous flaws in terms of its design and functionality. Going back more than three years ago we pioneered the first Gravity III Ballast System Upgrade, and since then we've helped lots of unhappy owners fix the issues with the factory setup.

The next evolution of that upgrade is this complete package, which includes everything you need, pre-selected and guaranteed to work seamlessly to revamp the factory system that's currently installed in your boat. Our Gravity III Ballast System Upgrade includes everything you need to completely overhaul your factory setup in one convenient package that has been tested through countless installations.

After installation, which we've worked hard to make it as simple as possible, your boat's factory ballast system will essentially be upgraded to the 2009+ factory system which uses a dedicated reversible pump for each bag in the system. That means you can say goodbye to priming issues, slow and inconsistent fill times, and you'll also gain a dedicated vent/overflow connection for each bag. Get more weight in your boat in less time, and with no drama, just an easy to operate system that works like you expect every time.

How It Works

We reuse as much of the factory components as possible to offer value and ease of installation for our customers. Your factory ballast system uses a single common fill pump, which is a huge bottleneck if you are filling all three ballast locations, since the output of that pump is split in thirds.

Our upgrade replaces that single common fill pump with a dedicated pump for each bag that is responsible for both filling and draining the system. That means you have the full capacity of that pump available to fill each bag, drastically reducing the amount of time required to fill and drain the system.

What's Included:

-WakeMakers Premium Reversible Ballast Pumps

-20ft. Pump Wiring Harnesses

-20ft. Battery Wiring Harnesses

-Pre-Wired Switch Block Module

-Battery Terminal Module w/ Fuse Holder

-2x 30 Amp Blade Fuses

-1" Ballast Hose Black

-1" & 1-1/8" Stainless Steel Hose Clamps

-3/4" Thread x 1" Hose Barb Fittings

-Fly High 1" Flow-Rite Quick Release Connectors

-Flow-Rite 1" Elbow Quick Release Connectors

-3/4" Bronze Ball Valves

-3/4" Bronze Mushroom Thru-Hull Intakes

-Attwood Clear Silicone Marine Adhesive

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  • 6/5/2017
    Don't waste time and money, go ahead and order this...
    Josh Moore

    I spent countless hours and dollars trying to patch and re-design the elementary ballast system provided in my 2003 SSV. I have some DIY power as well as some "make it work" engineering in my veins but I could not make the system pump in and out with consistent results. Leading up to this Memorial Day weekend, I had planned for two nights to un-package, install, and test the system. Well, due to UPS failure the bulk of the items arrived a day late which meant I had one night to get it in and working. This upgrade kit is so good that I was able to install the entire kit in less than 5 hours in my driveway with little to no tools. The wiring was as simple and straight forward as you could ever ask for and the plumbing wasn't anything to sweat either. I highly recommend this kit for anyone with a pre 2009 Supra. Wakemakers has done their homework and have a great kit.

  • 11/16/2016
    It changes everything :-)
    Donald Hebert

    Easy to install, it makes my 2007 Supra 22ssv ballast to fill-up and drain as fast as a brand new boat

  • 4/29/2013
    Upgrade successful!

    The Kit is well thought. the end result is awesome.

    the 750 bags now fill up in about 5-6 minutes, which is about 1/3 of the time than before.

    that was a very fun project!
    It's really worth it, i don't regret at all.