Is it better to store a lawn mower with a full tank of gas or empty? The best practice for storing a lawn mower is to keep the gas tank empty. This prevents fuel degradation and potential engine damage during long storage periods. Alternatively, if you choose to store it with gas, use a fuel stabilizer to maintain fuel quality.
Why Store a Lawn Mower with an Empty Tank?
Storing your lawn mower with an empty tank is generally recommended to avoid issues related to fuel degradation. Over time, gasoline can break down, leading to the formation of gum and varnish that can clog the carburetor and fuel lines. Here are some reasons why an empty tank is beneficial:
- Prevents Fuel Degradation: Gasoline can degrade in as little as 30 days. An empty tank eliminates the risk of stale fuel.
- Avoids Moisture Buildup: An empty tank reduces the chance of condensation forming inside the tank, which can lead to rust and corrosion.
- Minimizes Maintenance Issues: A clean, empty tank helps prevent the need for costly repairs related to fuel system cleaning.
How to Properly Empty the Gas Tank
If you decide to store your lawn mower with an empty tank, follow these steps to ensure it’s done correctly:
- Run the Engine: Allow the mower to run until it runs out of fuel. This ensures all fuel is used up in the carburetor and lines.
- Drain Remaining Fuel: Use a siphon pump to remove any leftover fuel from the tank.
- Clean the Carburetor: Consider cleaning the carburetor to remove any residual fuel.
When to Store a Lawn Mower with a Full Tank
In some cases, storing a lawn mower with a full tank can be beneficial, especially if you plan to use a fuel stabilizer. Here’s why you might consider this approach:
- Prevents Tank Rust: A full tank can prevent air and moisture from causing rust inside the tank.
- Fuel Stabilizer Use: Adding a fuel stabilizer can keep gasoline fresh for up to 12 months, preventing degradation.
How to Use a Fuel Stabilizer
- Purchase a Stabilizer: Choose a reputable brand designed for small engines.
- Add to Gasoline: Mix the stabilizer with gasoline according to the product instructions.
- Run the Engine: Run the mower for a few minutes to ensure the stabilizer circulates through the system.
Pros and Cons: Full vs. Empty Tank Storage
| Feature | Empty Tank | Full Tank with Stabilizer |
|---|---|---|
| Fuel Degradation | No risk | Stabilizer prevents degradation |
| Rust Prevention | Possible moisture risk | Full tank reduces rust risk |
| Maintenance Needs | Minimal | May require stabilizer use |
| Convenience | Requires draining | Easier with stabilizer |
Practical Tips for Lawn Mower Storage
- Clean the Mower: Remove grass clippings and debris to prevent rust and damage.
- Check Oil Levels: Change the oil to ensure the engine is protected during storage.
- Remove the Battery: If applicable, disconnect and store the battery in a cool, dry place.
- Store in a Dry Location: Keep the mower in a garage or shed to protect it from the elements.
People Also Ask
How long can gas sit in a lawn mower before it goes bad?
Gasoline can start to degrade in as little as 30 days. Using a fuel stabilizer can extend its shelf life up to 12 months, which is crucial if storing a lawn mower for extended periods.
What happens if I leave gas in my lawn mower over winter?
Leaving gas in your lawn mower over winter without a stabilizer can lead to fuel degradation, resulting in a clogged carburetor and potential engine damage. It’s best to use a stabilizer or empty the tank.
Can I use regular gas in my lawn mower?
Yes, most lawn mowers are designed to run on regular unleaded gasoline. However, avoid using gas with more than 10% ethanol, as it can damage the engine over time.
How do I prepare my lawn mower for winter storage?
To prepare your lawn mower for winter storage, clean the mower, change the oil, remove the battery, and either empty the gas tank or add a fuel stabilizer. Store it in a dry, protected area.
Is it necessary to change the oil before storing a lawn mower?
Changing the oil before storage is recommended. Old oil can contain contaminants that may cause engine damage. Fresh oil ensures the engine is well-lubricated and protected during storage.
Conclusion
Deciding whether to store your lawn mower with a full or empty gas tank depends on several factors, including your storage duration and conditions. An empty tank is often preferred to avoid fuel degradation, while a full tank with a stabilizer can prevent rust and keep fuel fresh. By following these tips and maintaining your mower, you can ensure it remains in optimal condition for the next mowing season. For more tips on lawn care and equipment maintenance, check out our related articles on seasonal lawn care and engine maintenance.