Engine Winterizing Kit


In stock online.
Model # 520411 | Mfg # 520411 | UPC # 25282016587

Winterize an outboard, I/O or inboard on the trailer.

Protecting your engine from freeze damage during the winter months avoids expensive repairs in the spring. Our Engine Winterizing Kit is a convenient way for boaters to do it themselves while the boat is on the trailer. Included in the kit is a 5 gallon jug with a connecting hose and  valve to control the flow of antifreeze. Complete instructions are included to walk you through the process. You will need approximately 5 gallons (per engine) of engine safe antifreeze, a garden hose, engine flusher, and a little time. Winterize your engine yourself and know it will be protected for the winter with our convenient kit.

See our winterization headquarters by clicking on How to Winterize Your Boat from the West Advisor tab above. There you will find step by step tutorials on winterizing different systems as well as an abundance of information to help you make informed decisions that will keep your boat’s systems safe in the off season.

Key Features

  • Provides a convenient way to winterize inboards and outboards
  • Winterization can be completed with boat on the trailer
  • Kit includes 5 gallon jug, connecting hose (with end fittings) and regulating valve
  • Users will need to supply a garden hose, motor flusher and antifreeze for each engine
 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.


Engine Winterizing Kit

Name Value
Capacity 5 Gallons
Type Pump Kits


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FREE DELIVERY to West Marine Stores

  • Available for ALL products including hazardous & truck freight items.
  • Ship to over 240 U.S. store locations.
  • Contiguous United States orders arrive in 7 - 10 days.
  • Hawaii and Alaska orders arrive in 10 - 16 days.
  • Expedited shipping is available for an additional fee.
  • Not available in Puerto Rico.

FREE SHIPPING on Orders over $49.00

  • Applicable on orders over $49.00 within the 48 contiguous United States.
  • Does not apply to Truck Freight.
  • No coupon code required.
  • Orders will be delivered within 3 - 7 business days.


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For additional inquiries, you may call Customer Service at 1-800-BOATING (262-8464).

Engine Winterizing Kit


3.9 Stars