FATSAC

FATSAC Yamaha Jet Boat Custom Swim-Deck Ballast Bag 850lb - Grey

Regular price $649.99 USD

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FATSAC C1304 Grey Yamaha Swim-Deck Ballast Sac with black handles and PVC cleats - primary view
$649.99 USD
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FATSAC Yamaha Jet Boat Custom Swim-Deck Ballast Bag 850lb - Grey


Description

The FATSAC C1304 Yamaha Swim-Deck Sac is a semi-custom ballast bag engineered specifically to fit 25' and 22' Yamaha jet boats, including 25', 24'6", 22', and 21'6" hull lengths. Delivering a full 850 lbs. of ballast, this bag is designed to sit directly on the swim deck and transform your boat's wake for surfing and wakeboarding without any guesswork on fitment.

Built by FATSAC - the industry leader in ballast solutions - this sac comes with all necessary fittings included right out of the box, so you can get on the water faster. Four welded-on PVC cleats provide secure rope attachment points, and the bag is compatible with the FATSAC S7090 pump system for quick filling and draining.


Key Features

  • Custom Fit for Yamaha Boats: Designed specifically for 25' and 22' Yamaha swim decks, fitting 25', 24'6", 22', and 21'6" boat models.
  • 850 lb. Ballast Capacity: Delivers a full 850 lbs. of water ballast to enhance your wake for surfing and wakeboarding.
  • All Fittings Included: Comes with W730, 2x W731, and W749 fittings - no extra hardware purchases needed.
  • 4 Welded PVC Cleats: Heavy-duty welded cleats provide strong, reliable anchor points for securing the bag with rope.
  • S7090 Compatible: Works with the FATSAC S7090 pump (sold separately) for fast, efficient fill and drain.
  • Swim-Deck Placement: Sits directly on the swim deck for a stable, properly positioned ballast setup.
  • FATSAC Quality Construction: Built by the trusted leader in wake ballast bags with durable, heavy-duty materials.
  • Secure Rope System: Handles guide the rope - must be used with a 12'+ rope (M1028 dock line recommended) to properly secure the sac through top and bottom cleats.

Shipping

Ships free! Please email us at service@omahasportsandgames.com for a delivery ETA or to confirm shipping details.


What's Included

  • FATSAC C1304 Yamaha Swim-Deck Ballast Sac (Grey)
  • W730 fitting
  • 2x W731 fittings
  • W749 fitting

Why You'll Love It

If you own a Yamaha jet boat and want to improve your surf wake, there's no better solution than a bag built exactly for your swim deck. The C1304 takes all the guesswork out of ballast sizing - it's made for your boat, drops right into place, and delivers serious weight where it counts. At 850 lbs., you'll notice an immediate and dramatic improvement in wave shape and push.

FATSAC has been the go-to ballast brand for serious watersports enthusiasts for years, trusted by wakeboarders and wake surfers nationwide. Every detail - from the welded PVC cleats to the included fittings - reflects that commitment to quality and ease of use. Whether you're chasing the perfect surf wave or dialing in your wakeboard setup, this bag gives you the ballast muscle to make it happen, season after season.


Product Specifications

View Product Specs
SKU C1304
Ballast Capacity 850 lbs.
Compatible Boats Yamaha 25', 24'6", 22', and 21'6" swim deck models
Color Grey
Included Fittings W730, 2x W731, W749
Cleats 4 welded PVC cleats
Pump Compatibility S7090 (sold separately)
Rope Requirement 12' or longer (not included; M1028 recommended)
Assembly Required No - fitting installation and rope securing required; no tools needed
Shipping Method Standard parcel shipping

FAQ

Does the C1304 fit my Yamaha boat?

The C1304 is designed to fit the swim decks on 25', 24'6", 22', and 21'6" Yamaha jet boats. If your boat falls within these hull lengths and has a standard Yamaha swim deck, this sac should be an excellent fit. If you're unsure, feel free to email us at service@omahasportsandgames.com and we'll help confirm compatibility.

Is a pump included with the ballast bag?

No, the pump is not included. The C1304 is compatible with the FATSAC S7090 pump system, which is sold separately. You'll need a pump to fill and drain the bag efficiently on the water.

Do I need a rope to use this bag?

Yes - you must use a rope of at least 12 feet or longer to properly secure the bag through both the top and bottom cleats. The handles on the bag are guides for the rope only and should not bear any pulling force. FATSAC recommends their M1028 heavy-duty marine dock line for this purpose.

Does the bag need to be completely full when used?

Yes, absolutely. The bag must be filled 100% full with no air remaining inside. Partially filling the bag can cause it to shift, which may damage the bag and void the warranty. The recommended method is to first fill the bag with air to position it properly on the swim deck, then use the pump to fill it with water while bleeding out remaining air through the air release valve until the bag is completely full.

Will this ballast bag improve my surf wake?

Yes - adding 850 lbs. of ballast to your swim deck will significantly increase the size and push of your surf wave. Combined with your boat's built-in ballast and surf system, the C1304 can help you dial in a longer, more powerful wave perfect for wake surfing. Results will vary based on boat speed, rider weight, and other conditions.

What is the California Prop 65 warning about?

This product contains materials including Diisononyl phthalate (DINP), which is listed by the State of California as a chemical known to cause cancer. This is a standard warning required for many PVC-based products sold in California. For more information, visit www.P65Warnings.ca.gov.


Product specifications table
Specification name Specification Value
Color pattern Gray

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