FatSac C1304 Yamaha Jet Boat Swim-Deck Ballast Bag 850lb Grey

The FatSac C1304 is a semi-custom, swim-deck ballast bag engineered specifically for 25' and 22' Yamaha jet boat models — including 25', 24'6", 22', and 21'6" boats. Secured to the swim platform step, this 850 lb ballast bag adds substantial rear weight to deepen and steepen your wake for wake surfing and wakeboarding.

Key Features:

• 850 lb total ballast capacity — significantly increases rear wake depth and size
• Custom fit for Yamaha swim deck models (25', 24'6", 22', and 21'6" boats)
• All fittings included — W730, 2x W731, and W749 fittings come in the box
• Compatible with the W709-SUPA pump for fast fill and empty
• 4 welded-on PVC cleats for secure rope tie-down to the swim platform
• Built from heavy-duty industrial layered vinyl with fiber scrim — similar in construction to river raft material
• Welded seams taped for industry-leading strength and durability
• Grey colorway for a clean, understated look on the water

Installation Notes:

• Requires a 12' or longer rope to properly secure the bag (see M1028 heavy-duty marine dock line)
• Secure rope through cleats/handles on both the top and bottom of the bag
• Fill the bag with air first to position it, then use the pump to fill completely with water
• The bag must be filled 100% full — partial filling can cause shifting and damage
• Use the air release valve to purge remaining air before completing the fill

FatSac ballast bags are manufactured in Milwaukee, USA using precision cutting and welding systems. The C1304 swim-deck sac is a trusted solution for Yamaha jet boat owners looking to maximize their surfing and wakeboarding experience.