Fatsac Intermediate Boat Ballast Kit2x Fatsac Centre 750lb Fat Sac The Fatsac Centre 750lb Fat Sac is the most popular wakeboard ballast bag of all time. It offers a huge amount of weight in a versatile size that works in almost any common location for nearly every application. In v drive boats, place them in the rear lockers next to the engine. In direct drive boats, place one on each side of the engine for 1,500lbs of balanced ballast, or configure them in an L shape for a surfable