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Better Boat

Boat Winterizing Kit and RV Winterizing Kit, 5-Gallon Antifreeze Tank

  • Based on 225 reviews
Condition: New
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This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Oct 26
Order within 3 hours and 56 minutes
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Features

  • EXTENDS ENGINE LIFE: Our winterizing kit uses a high-quality gravity flow system to flush, prepare, and protect your boat's engine, significantly extending its life expectancy while saving you time and money on maintenance.
  • EASY TO USE: The kit includes a 5 Gallon antifreeze tank with an on/off valve, a T-connector, shutoff valve, and a reinforced clear hose with fittings, making the winterizing process straightforward for both inboard and outboard engines.
  • IMPROVES ENGINE PERFORMANCE: The high-flow fittings ensure uninterrupted antifreeze flow, effectively cleaning impurities and enhancing overall engine performance, leading to a more reliable operation. Don't connect to suction of raw water pump.
  • COMPATIBLE AND CONVENIENT: Designed for use with most inboard and outboard engines. Simply requires separate antifreeze, motor muffs or pump adapter (sold separately). Perfect for boaters looking to safeguard their investment during the off-season.
  • WHY CHOOSE BETTER BOAT PRODUCTS: We are a family-owned American business committed to making premium quality boat parts, products, and accessories. We stand behind the quality of our boating accessories.

Item Package Dimensions L x W x H: ‎14.5 x 14.5 x 14.25 inches


Package Weight: ‎2.04 kg


Brand Name: ‎Better Boat


Warranty Description: ‎Manufacturers 100% Satisfaction Guarantee


Model Name: ‎BB-WNT-KIT


Color: ‎White


Material: ‎Plastic


Suggested Users: ‎unisex-adult


Number of Items: ‎1


Manufacturer: ‎Better Boat


Included Components: ‎5 GALLON TANK, CLEAR HOSE, ON/OFF VALVE, SHUTOFF VALVE, T-CONNECTOR


ASIN: B0D6CJBDP9


Customer Reviews: 4.6 out of 5 stars (225)


Best Sellers Rank: #1,879 in Sports & Outdoors (See Top 100 in Sports & Outdoors) #1 in Boat Engine Motor Flushers


Date First Available: October 3, 2024


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Oct 26

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Works great
This product works great. Especially if you are winterizing a boat by yourself! Would buy again
Reviewed in the United States on October 15, 2026 by Dan
    • Works great
Does the job well. Makes it much easier to winterize your boat.
Reviewed in the United States on May 2, 2026 by Hunter 65
    • Great Product
Worked perfectly on my Mercruiser 5.7LX. No leaks, good flow, very easy to use. The only issue using this method is if you fog the engine, you have to time it so you fog it when down to the last gallon, but pretty easy to time that. Highly recommend this product, especially if you have an older boat without wing nut drain plugs, but screws that are very difficult to get to like mine. ... show more
Reviewed in the United States on September 20, 2025 by Amazon Customer
    • Amazon products
Good quality fast shipping
Reviewed in the United States on October 16, 2026 by Joe Keney
    • Delivery
An awesome product!
Reviewed in the United States on October 10, 2026 by Michael Davis
    • Pretty good, but needs better values.
Review Image by Rob
Works really well. Made winterizing pretty easy. My only note is about the plastic valves. They work fine but feel pretty cheap. I'll probably replace those. It would be pretty awful to have those fail.
Reviewed in the United States on September 14, 2026 by Rob
    • Good kit. Decent price
Awesome little kit. Just used it to winterize my Volvo penta 4.3GXI inboard. It held close to 6 gallons of antifreeze and worked as it should've
Reviewed in the United States on November 26, 2025 by Bridget
    • Easy
This was super easy to use and it was good quality. It took me 15 min with this to winterize my boat.
Reviewed in the United States on October 25, 2025 by Amazon Customer

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