What Type of Gas Do I Put in My Sea-Doo? [Official Sea-Doo Guide]

For those looking for a fast and direct answer, here are the general fuel recommendations for Sea-Doo personal watercraft and pontoon boats. However, always refer to your Sea-Doo owner's manual for the most precise fuel specifications for your specific model and year.

Sea-Doo Personal Watercraft (PWC) Gas Recommendation

For optimal performance, engine longevity, and to uphold your Sea-Doo's warranty, we generally recommend using:

Engines: 300 & 325 hp

• Minimum Octane Rating: 91
• Fuel Type: Premium gasoline
• Ethanol Content: Maximum 10% (E10) or less. Ethanol-free gasoline is preferred, especially when storing your Sea-Doo or operating in humid environments.

Engines: All others

• Minimum Octane Rating: 87
• Fuel Type: Unleaded Gasoline
• Ethanol Content: Maximum 10% (E10) or less. Ethanol-free gasoline is preferred, especially when storing your Sea-Doo or operating in humid environments.

 Sea-Doo Pontoon Boat Gas Recommendation

Similar to our personal watercraft, Sea-Doo pontoon boats also thrive on the following fuel:

Engines: 100, 130, 170 & 230 Hp

• Minimum Octane Rating: 87
• Fuel Type: Unleaded Gasoline
• Ethanol Content: Maximum 10% (E10) or less. Again, ethanol-free gasoline is the ideal choice, particularly for storage and in humid conditions.

Are There Fuel Differences for Specific Sea-Doo Models?

While the 87 octane unleaded gasoline recommendation is broadly applicable across many Sea-Doo models, it's crucial to verify the specific fuel requirements in your Sea-Doo owner's manual. Model years and engine types can sometimes have nuanced fuel recommendations. Your manual is the definitive guide for your specific vehicle.

Other Fuel Considerations

Under no circumstances should you use fuel from pumps labeled E85. This fuel is not designed for PWC and pontoon engine and will cause significant damage. Furthermore, avoid experimenting with other fuel types. Using an incorrect fuel can lead to irreversible engine damage and fuel system failures, potentially resulting in costly repairs and safety hazards.

It's tempting to think "gas is gas," but when it comes to your Sea-Doo, the type of fuel you choose has a significant impact on engine health and performance. Using the recommended marine gas – or rather, the recommended grade of gasoline for marine engines – is an investment in your watercraft's or pontoon's future.

Ensuring Peak Engine Performance and Longevity

Sea-Doo engines, known for their power and responsiveness, are engineered to operate optimally with specific fuel characteristics, particularly octane rating.

Using the correct octane fuel ensures:

• Maximum Power and Acceleration: Your engine can deliver its designed horsepower and provide the exhilarating performance you expect.
• Smooth and Efficient Operation: The engine runs smoothly, responds predictably to throttle inputs, and operates at its most fuel-efficient.
• Extended Engine Life: Using the right fuel minimizes stress on engine components, reducing wear and tear and contributing to a longer lifespan.

Avoiding Costly Engine Damage: The Risk of Low Octane Fuel

Using gasoline with an octane rating lower than recommended can have serious consequences for your Sea-Doo engine. The primary risk is engine knocking or pinging. This occurs when the fuel-air mixture in the cylinder ignites prematurely and uncontrollably.

Engine knocking can lead to:

• Reduced Power and Performance: You'll likely notice a decrease in power and responsiveness.
• Overheating: Abnormal combustion creates excessive heat within the engine.
• Piston and Cylinder Damage: Knocking can cause physical damage to pistons, cylinders, and other internal engine parts, leading to expensive repairs.
• Premature Engine Wear: Even if damage isn't immediate, long-term use of low octane fuel accelerates engine wear and reduces its overall lifespan.

To make informed decisions at the fuel pump, it's helpful to understand the key properties of gasoline: octane rating and ethanol content. This knowledge is especially important when selecting marina gas or boat fuel.

What is Octane Rating and Why Does it Matter?

The octane rating of gasoline is a measure of its ability to resist engine knocking or pinging. Think of it as the fuel's resistance to premature detonation under pressure. Higher octane fuels are more stable and less prone to knock. Sea-Doo recommends a minimum octane rating because their engines are designed to perform reliably with that level of knock resistance.

Regular vs. Premium Gasoline: Is Premium Always Better?

Gasoline is typically offered in grades like "regular," "mid-grade," and "premium." The primary difference between these grades is their octane rating:

• Regular Unleaded: Typically 87 octane. This is often sufficient for many Sea-Doo models.
• Mid-Grade Unleaded: Usually 89 octane.
• Premium Unleaded: Generally 91 octane or higher.

While premium gasoline has a higher octane rating, it doesn't necessarily mean it's "better" for all engines. If your Sea-Doo owner's manual recommends 87 octane, using premium gasoline generally won't provide any performance benefits and is simply a higher cost. Focus on meeting the minimum octane recommendation in your manual.

Ethanol in Gasoline: The Marine Engine Consideration

Ethanol is an alcohol biofuel commonly blended into gasoline in many regions. While it can have some benefits in automotive engines, ethanol can present challenges for marine engines like those in Sea-Doos if not managed properly.

What is Ethanol and Why is it Added to Fuel?

Ethanol is often added to gasoline as an oxygenate to reduce emissions and sometimes as a renewable fuel component.

The Problem with Ethanol in Marine Environments

Ethanol can be problematic in marine engines due to:

• Water Absorption: Ethanol is hygroscopic, meaning it attracts and absorbs water. In marine environments, this can lead to water accumulating in your fuel tank.
• Phase Separation: Excessive water in ethanol-blended fuel can cause "phase separation," where the ethanol and water mixture separates from the gasoline, forming a layer of ethanol and water at the bottom of the tank. This separated layer is highly corrosive and can damage your engine and fuel system.
• Material Compatibility: Ethanol can degrade certain rubber and plastic components in older fuel systems not designed for ethanol blends.

Sea-Doo's Official Stance on Ethanol Content

Sea-Doo recommends using gasoline with an ethanol content of no more than 10% (E10) or less. Ethanol-free gasoline is strongly preferred, especially for storage and in humid environments where water absorption is a greater concern.

Best Practices to Mitigate Ethanol Concerns

While E10 gasoline is often readily available, you can take steps to minimize potential ethanol-related issues:

• Check Fuel Pump Labels: Always check the fuel pump label for ethanol content. Look for pumps clearly labeled "Ethanol-Free" if you want to avoid ethanol completely.
• Consider Ethanol-Free Gasoline When Possible: If ethanol-free gasoline is available and practical in your area, especially at marinas, opt for it, particularly for seasonal storage or if you operate your Sea-Doo infrequently.
• Use a Quality Marine Fuel Stabilizer: When using ethanol-blended fuels, especially for storage or if you're unsure about fuel freshness, use a quality marine fuel stabilizer specifically designed to combat ethanol-related issues. These stabilizers help prevent phase separation and fuel degradation.

Mistakes happen. If you realize you've accidentally put the wrong type of gas in your Sea-Doo, here's what to do:

Recognizing the Signs: Symptoms of Incorrect Fuel

If you've used fuel with too low octane or fuel with excessive ethanol, you might notice:

• Engine Knocking or Pinging: A rattling or knocking sound, especially under acceleration.
• Reduced Engine Performance: Lack of power, sluggish acceleration.
• Rough Idling or Stalling: The engine may run unevenly or stall.
• Difficulty Starting: The engine may be harder to start than usual.

Immediate Actions to Take If You Used Incorrect Fuel

• If You Haven't Started the Engine: If you realize your mistake before starting the engine, do not start it. If possible and safe, drain the fuel tank completely and refuel with the correct gasoline. If you are not comfortable draining the tank yourself, consult a Sea-Doo technician.

• If the Engine is Running and You Suspect Wrong Fuel: If you've already started the engine and suspect you used the wrong fuel based on performance issues or knocking sounds, stop the engine safely as soon as possible. Do not continue to run the engine. Consider draining the fuel and refilling with the correct type.

If symptoms persist, seek professional service.

Proper fuel storage is essential, especially if you store your Sea-Doo for extended periods, such as during the off-season.

The Importance of Fuel Stabilizer for Seasonal Storage

For any Sea-Doo that will be stored for more than a few weeks, especially with ethanol-blended fuel, using a quality marine fuel stabilizer is highly recommended. Fuel stabilizers help:

• Prevent Fuel Degradation: They keep gasoline from breaking down and forming varnish or gum deposits during storage.
• Combat Ethanol Issues: Many stabilizers are formulated to specifically address ethanol-related problems like phase separation and water absorption.
• Ensure Easier Spring Start-Up: Stabilized fuel helps ensure your Sea-Doo starts reliably when you're ready to hit the water again after storage.

Best Practices for Storing Your Sea-Doo with Fuel

• Add Fuel Stabilizer to the Tank: Treat your fuel with stabilizer according to the product instructions before storage.
• Fill the Fuel Tank (3/4): A fuel tank filled to the 3/4 of its capacity will leave room for expansion while minimizing air space, reducing condensation and potential for water to accumulate, especially with ethanol blends.
• Store in a Cool, Dry Place: Store your Sea-Doo in a location that is protected from extreme temperature swings and moisture.
• Consider Ethanol-Free Fuel for Storage: If feasible, using ethanol-free gasoline for storage is an excellent way to minimize ethanol-related concerns.

While this guide provides general recommendations, always consult your Sea-Doo owner's manual. It is the definitive source for fuel specifications, maintenance schedules, and all model-specific information for your Sea-Doo personal watercraft or pontoon boat.

• Use the Recommended Octane: While most Sea-Doos recommend 87 octane unleaded gasoline, those with 300 hp or 325 hp engines demand premium gasoline with a minimum 91 octane rating. Always consult your owner's manual for specific requirements.
• Be Mindful of Ethanol: Use gasoline with 10% ethanol or less (E10), and ethanol-free is even better, especially for storage.
• Use Fuel Stabilizer for Storage: Protect your fuel and engine during storage by using a quality marine fuel stabilizer.
• Consult Your Owner's Manual: Your owner's manual is the most accurate and specific guide for your Sea-Doo.

Choosing the right boat gas for your Sea-Doo is a simple yet vital step in ensuring years of reliable performance and unforgettable adventures on the water. By following these guidelines and always referring to your owner's manual, you can confidently fuel up and focus on what truly matters: enjoying your time on your Sea-Doo!

Safe travels and happy riding!