Sea-Doo Winterization Guide

Protect your investment before the cold sets in. This guide walks you through BRP's recommended end-of-season storage sequence for Sea-Doo PWC and Switch models. Always verify that products are compatible with your specific model and model year before purchasing. Consult your owner's manual or a certified Sea-Doo technician if you have any questions.

Step 1 — Flush the Engine & Cooling System

After your last ride, flush the engine with fresh water using the flush fitting on your watercraft (refer to your owner's manual for the correct procedure for your model). This removes salt, minerals, and debris from the cooling passages. Skipping this step can cause corrosion damage over the winter.

Model note: Flush procedures differ between Rotax 4-TEC, 900 ACE, and Switch hull engines. Confirm the correct method in your owner's manual.

Step 2 — Change the Engine Oil & Filter

Fresh oil over winter prevents acids and contaminants in used oil from corroding internal engine components during storage. BRP recommends changing the oil and filter at the end of every season.

Always verify the kit matches your engine displacement and model year before ordering.

Step 3 — Replace Spark Plugs

Worn or fouled spark plugs left in over winter can corrode further, making spring start-up harder. Installing fresh plugs now means your machine is ready to go the moment the water warms up.

Plug specifications vary by engine. Check your owner's manual or the product listing for fitment information before purchasing.

Step 4 — Protect Internal Engine Surfaces

After the oil change and plug replacement, apply an anti-corrosion treatment to protect metal surfaces inside the engine and bilge from moisture and oxidation during storage.

Follow the application instructions in your owner's manual or on the product label. Application method varies by model.

Step 5 — Treat the Fuel System

If you plan to leave fuel in the tank over winter, use a fuel stabilizer to prevent varnish build-up and fuel degradation. Alternatively, run the tank dry and add a small amount of stabilizer to protect the fuel lines and carb/injectors. Consult your owner's manual for BRP's recommended approach for your model.

Browse the Sea-Doo PWC Parts & Maintenance collection for available fuel system products.

Step 6 — Check Coolant (Closed-Loop Systems)

Certain Sea-Doo models with closed-loop cooling systems require coolant inspection before winter storage. Low or degraded coolant can cause freeze damage in climates where temperatures drop below freezing.

Open-loop (direct water-cooled) models do not use a coolant reservoir. Confirm your cooling system type in your owner's manual before purchasing.

Step 7 — Antifreeze Exhaust & Intercooler

Even though you have a closed loop cooling system, it is important in cold weather climates to run antifreeze through your exhaust system and intercoolers.

    Step 8 — Clean & Cover

    Thoroughly wash and dry the hull, deck, and interior before storage to prevent mildew and UV damage. Then cover the watercraft to shield it from dust, debris, and weather.

    Shop BRP OEM covers by model:

    Find the full line of XPS cleaners here

    Cover fitment is model-specific. Confirm your model year and hull type before ordering.

    All Maintenance & Care Products

    Looking for additional parts, fluids, or accessories? Browse our full maintenance collections:

    Disclaimer: This guide is intended as a general reference based on BRP's published winterization recommendations. Product compatibility, specifications, and procedures vary by model and model year. Always consult your owner's manual or a certified Sea-Doo technician before performing service. Sea-Doo Superstore is not responsible for any damage resulting from improper application of the information on this page.