Why Winterising Your Jet Ski Matters

Why Winterising Your Jet Ski Matters

by Fran Boyce on April 24, 2026 Categories: News

Even in Western Australia, where winters are milder, leaving your jet ski unused without preparation can lead to:

  • Engine corrosion
  • Battery failure
  • Fuel degradation
  • Mould and moisture build-up

Taking the time to winterise your PWC properly helps extend its lifespan and prevents costly repairs.

Step-by-Step: How to Winterise Your Jet Ski

1. Flush the Engine Thoroughly

After your last ride, especially in saltwater, flush the engine with fresh water to remove salt, sand, and debris.

Pro tip: Use a quality flush product like Salty Captain's Engine Flush to help break down salt and protect internal components.

2. Add Fuel Stabiliser

Fuel can degrade over time and cause engine issues. Adding a stabiliser:

  • Prevents fuel breakdown
  • Protects the fuel system
  • Makes startup easier next season

Run the engine briefly after adding XPS Fuel Stabiliser so it circulates properly.

3. Protect the Engine with Storage Oil

This is one of the most important steps - especially for first-timers.

Using a product like Sea-Doo XPS Storage Oil Spray, you can:

  • Coat internal engine components
  • Prevent rust and corrosion
  • Protect against moisture during storage

4. Drain All Water from the Hull

Water left sitting in your jet ski can lead to mould, odours, and corrosion.

Tools like the Suckomatic Pro make this easy by removing water from:

  • Footwells
  • Engine bay
  • Bilge areas

5. Remove and Charge the Battery

Take the battery out and store it in a dry place. Keep it charged throughout winter to prevent it from dying.

6. Clean and Dry Your Jet Ski

Give your jet ski a full clean:

  • Wash off salt and grime
  • Dry thoroughly
  • Apply protective sprays where needed

This helps prevent long-term damage and keeps your ski looking new.

7. Cover Your Jet Ski Properly

Invest in a quality Sea-Doo cover to protect against:

  • Dust and debris
  • UV damage
  • Moisture

Avoid cheap covers that trap moisture - breathability is key.

Common Mistakes to Avoid

First-time winterisers often:

  • Skip fuel stabiliser
  • Forget to remove water from the hull
  • Leave the battery connected
  • Store the ski without a proper cover

Avoiding these mistakes can save you time and money later.

Should You DIY or Book a Service?

If you’re confident, you can handle basic winterising yourself. But if you’re unsure - or want peace of mind - it’s always worth getting a professional involved.

At Friday’s Jet Skis, we offer:

  • Pre-storage servicing
  • Full winterisation packages
  • Genuine Sea-Doo parts and maintenance products
  • Expert advice tailored to your model

Winterise Your Jet Ski with Confidence at Friday’s

If you’re winterising your jet ski for the first time, the easiest way to get it right is to speak with the experts.

👉 Visit Friday’s Jet Skis in Port Kennedy
👉 Pick up the right products (like XPS Storage Oil and covers)
👉 Or book a professional winterisation service

Taking the time now means a hassle-free start when summer rolls back around.