The crisp air is settling in, the leaves are changing, and the smell of pumpkin spice is everywhere. But before you stow your lawnmower for the winter, you might be wondering: can you leave gas in it? This is a common question with a surprisingly complex answer. We’ll dive into the reasons why leaving gas in your mower over winter might be a bad idea, how to properly store your lawnmower, and the potential benefits of adding fuel stabilizer.
Short Answer: It’s generally not recommended to leave gas in your lawnmower over winter. While it’s okay for a short period, leaving gas in the tank for extended periods can lead to problems like gumming, varnishing, and even damage to your engine.
Why Is Leaving Gas in Your Lawn Mower Over Winter Bad?
Leaving gas in your lawnmower for an extended period can lead to a number of problems. Here’s why:
Gas Degrades Over Time
Gasoline is a volatile substance that deteriorates over time. This deterioration is accelerated by exposure to air, heat, and sunlight. When gas degrades, it forms a sticky residue called varnish that can gum up your engine’s internal parts.
Varnish Can Cause Engine Problems
Varnish buildup can block fuel lines, clog fuel filters, and even stick engine valves. This can lead to a variety of problems including:
- Difficult starting: The engine might struggle to start or run rough.
- Reduced power: You might notice a decrease in the lawnmower’s power and performance.
- Engine damage: In severe cases, varnish buildup can cause irreparable damage to your engine.
Ethanol Can Worsen the Problem
Modern gasoline often contains ethanol, which can further accelerate the degradation process. Ethanol absorbs water, leading to the formation of condensation inside the fuel tank. This condensation mixes with the gasoline and can cause rust and corrosion in your fuel system.
How to Store Your Lawn Mower for Winter
To prevent these problems, it’s important to properly store your lawnmower for winter. Here’s a step-by-step guide:
1. Empty the Fuel Tank
The most important step is to empty the fuel tank completely. You can either use the remaining gas in your lawnmower or transfer it to a container for future use.
2. Run the Engine Dry
After emptying the tank, run the engine until it stops on its own. This will help ensure that any remaining gas in the fuel lines is used up.
3. Add Fuel Stabilizer (Optional)
If you can’t completely empty the tank, consider adding a fuel stabilizer to the gas. This will help to prevent the formation of varnish and extend the life of your gasoline.
4. Clean and Maintain Your Mower
Before storing your lawnmower, give it a good cleaning. Remove any grass clippings or debris, and lubricate moving parts. Consider changing the oil and spark plug, depending on the manufacturer’s recommendations.
5. Store in a Dry, Cool Place
Store your lawnmower in a dry, cool place, preferably indoors. Protect it from moisture and extreme temperatures.
Is There a Benefit to Leaving Gas in the Tank?
There is a slight benefit to leaving a small amount of gas in the tank, particularly if you live in a cold climate. A full tank of gas can help to prevent condensation from forming inside the tank. However, this only applies if you’re storing your lawnmower in a cold environment.
Final Thoughts
Ultimately, the decision of whether to leave gas in your lawnmower over winter is up to you. However, by understanding the risks and taking steps to protect your equipment, you can ensure that your lawnmower is ready to go when you need it.
FAQ
1. Why is it bad to leave gas in a lawnmower over winter?
Gasoline deteriorates over time, especially when exposed to the elements. This deterioration creates a gummy residue that can clog your lawnmower’s fuel system, making it difficult to start in the spring. Additionally, the fuel can evaporate, leaving behind water that can freeze and damage your engine.
It is best to avoid leaving gas in your lawnmower over the winter, as this can lead to costly repairs. You can either use up the fuel before storing it or stabilize it with fuel stabilizer.
2. What happens if I leave gas in my lawnmower over winter?
Leaving gas in your lawnmower over winter can lead to several problems, including:
- Clogged fuel lines and carburetor: The gas will break down and form a gummy residue that can clog your fuel lines and carburetor, making it difficult for your lawnmower to start.
- Engine damage: Water in the fuel can freeze and damage your engine.
- Rust and corrosion: The gas can also cause rust and corrosion in your fuel system.
It is best to drain the fuel tank before storing your lawnmower for the winter to avoid these problems.
3. How do I drain the gas from my lawnmower?
Draining the gas from your lawnmower is a relatively simple process. First, ensure the engine is cool and unplug the spark plug wire to prevent accidental starting. Then, locate the fuel tank drain valve, which is usually located at the bottom of the tank. Open the valve and allow the fuel to drain into a suitable container. You can also use a siphon pump to remove the fuel from the tank.
Once the tank is empty, start the engine briefly to clear any remaining fuel in the fuel lines and carburetor. This will help to prevent any gum buildup during storage.
4. What is fuel stabilizer and how does it work?
Fuel stabilizer is a chemical additive that helps to prevent the deterioration of gasoline. It works by inhibiting the oxidation process that breaks down gasoline molecules. By using a fuel stabilizer, you can safely store gasoline in your lawnmower over the winter without worrying about it going bad.
When using a fuel stabilizer, it’s important to follow the manufacturer’s instructions. Generally, you add the stabilizer to your gas tank and run the engine for a few minutes to distribute it throughout the fuel system.
5. How do I store my lawnmower for the winter?
To properly store your lawnmower for the winter, start by draining the fuel tank. If you choose to use fuel stabilizer, ensure it is properly mixed. Clean the mower deck, and change the oil. Next, remove the spark plug wire to prevent accidental starting, and store the mower in a dry, well-ventilated area. Cover the mower with a tarp or dust cover to protect it from dust and debris.
Before you store it, consider running the engine for a few minutes to clear any remaining fuel and allow the oil to distribute evenly.
6. Should I use ethanol-free gasoline in my lawnmower?
While not always necessary, ethanol-free gasoline is a good choice for storing your lawnmower over winter. Ethanol attracts water, which can cause problems in your fuel system. Ethanol-free gasoline is less prone to attracting water and will deteriorate at a slower rate. However, it is essential to note that most fuel stabilizers are designed for gasoline containing ethanol.
If you choose to use ethanol-free gas, make sure it’s properly stored and protected from moisture.
7. Can I use a fuel additive in my lawnmower?
Fuel additives can be beneficial, but it is vital to choose the right one for your lawnmower. Some additives are designed to improve engine performance, while others are specifically formulated to prevent fuel deterioration.
Always consult your lawnmower’s owner’s manual for recommendations on fuel additives. Avoid using additives that are not specifically designed for gasoline-powered engines.