The warm sun is shining, the birds are singing, and the grass is growing – it’s time to fire up the lawn mower and tackle that green jungle in your backyard. But hold on! Before you even think about pulling that starter cord, you need to ask yourself: what kind of gas goes in my lawn mower?
This article will delve into the world of lawn mower fuel, exploring the different types of gasoline, the benefits and drawbacks of each, and ultimately help you choose the best fuel for your machine. We’ll also cover important tips for storing and handling gasoline, ensuring both your lawn mower’s performance and your safety.
A Quick Overview
For most modern lawn mowers, the answer is simple: regular unleaded gasoline. This is the same type of fuel you put in your car, but it’s important to note that the octane rating might differ. However, the specific requirements will depend on the age and type of your lawn mower, so it’s always a good idea to check the owner’s manual for the most accurate information.
Understanding Gasoline: The Basics
Before we dive into the specifics of lawn mower fuel, let’s take a moment to understand the different types of gasoline available and how they differ.
Octane Ratings: A Key Difference
Gasoline is rated based on its octane number, which measures its resistance to knocking or pinging during combustion. Higher octane ratings indicate a higher resistance to knocking, making them ideal for high-performance engines that operate at higher compression ratios.
87 Octane (Regular): The Most Common Choice
This is the most widely available and generally the cheapest gasoline. It’s suitable for most lawn mowers, especially older models with lower compression engines.
89 Octane (Mid-Grade): A Happy Medium
This option falls between regular and premium and is often a good compromise for engines that require a slightly higher octane rating.
91 Octane (Premium): For Peak Performance
This is the highest octane rating available at most gas stations and is designed for high-performance engines. While it may offer a slight performance boost in some lawn mowers, it’s generally unnecessary and can be more expensive.
The Impact of Ethanol
Ethanol is a biofuel derived from corn and is often blended with gasoline. While it can offer some environmental benefits, it can also have negative impacts on lawn mower engines.
Ethanol’s Potential Issues
- Corrosion: Ethanol can corrode engine parts, particularly older metal components.
- Fuel Separation: Ethanol attracts water, which can lead to fuel separation and clogging in the fuel lines and carburetor.
- Performance Degradation: Ethanol can reduce engine power and fuel efficiency.
Alternatives to Ethanol-Blended Fuel:
For optimal performance and longevity of your lawn mower, consider using:
- Non-ethanol gasoline: This is often available at specialty retailers and marinas.
- Gasoline stabilizer: Adding a fuel stabilizer can help prevent ethanol’s negative effects.
Choosing the Right Gasoline for Your Lawn Mower
Now that we’ve covered the basics of gasoline, let’s focus on the best choice for your lawn mower.
Check Your Owner’s Manual: The Ultimate Guide
The single most important resource for determining the correct type of gasoline for your lawn mower is the owner’s manual. It will clearly specify the recommended octane rating and any fuel-related restrictions.
Consider Your Lawn Mower’s Age:
- Older Models: Older lawn mowers are typically designed for lower octane gasoline and may be more susceptible to problems with ethanol. Using non-ethanol gasoline or adding a fuel stabilizer can help.
- Newer Models: Modern lawn mowers often have more advanced fuel systems that are better equipped to handle ethanol-blended gasoline. However, it’s always best to check the owner’s manual.
Factors to Consider Beyond Octane:
While octane is crucial, consider these additional factors:
- Fuel Quality: Try to use gasoline from reputable gas stations, as lower-quality fuel can contain impurities that can harm your engine.
- Fuel Storage: Properly store gasoline to prevent contamination and ensure its quality.
- Fuel Maintenance: Regularly drain and replace old gasoline, especially during prolonged storage periods.
Tips for Storing and Handling Gasoline
Proper handling and storage of gasoline is crucial for both your lawn mower’s performance and your safety.
Storage Tips
- Use Approved Containers: Store gasoline only in approved, leak-proof containers.
- Keep it Cool and Dry: Store gasoline in a cool, dry place away from direct sunlight and heat.
- Label Containers: Clearly label containers with the date and type of fuel.
- Don’t Overfill: Leave some space in the container to allow for expansion.
Safety Precautions
- Handle with Care: Always handle gasoline with care and avoid spills.
- Keep it Out of Reach: Store gasoline out of reach of children and pets.
- Ventilate: When working with gasoline, ensure proper ventilation to prevent the buildup of flammable vapors.
- Fire Safety: Keep a fire extinguisher readily available and be aware of potential fire hazards.
Conclusion: Fueling Your Lawn Mower for Success
Selecting the right kind of gas for your lawn mower is essential for maintaining its performance and longevity. By understanding the different types of gasoline, considering your lawn mower’s specifications, and following proper storage and handling procedures, you can ensure that your machine runs smoothly and reliably for many years to come.
Remember, your owner’s manual is your best guide, and when in doubt, always consult with a qualified mechanic or lawn mower expert. Happy mowing!
FAQ
What kind of gas should I use in my lawn mower?
The type of gas you should use in your lawn mower is typically specified in the owner’s manual. However, most gas-powered lawn mowers recommend using regular unleaded gasoline with an octane rating of 87 or higher. It’s important to use fresh gasoline, as older gasoline can break down and gum up your mower’s engine.
Avoid using gasoline that contains ethanol, as it can attract moisture and damage your mower’s fuel system. Look for gasoline labeled “ethanol-free” or “re-refined gasoline.” If you can’t find ethanol-free gas, consider adding a fuel stabilizer to help prevent fuel deterioration.
Does it matter if I use premium gas in my lawn mower?
While using premium gas may not harm your lawn mower, it’s not necessary. Regular unleaded gasoline with an octane rating of 87 or higher is sufficient for most lawn mowers. Premium gas has a higher octane rating, which is designed for high-performance engines that require a higher resistance to knocking or detonation. Lawn mower engines generally don’t benefit from the higher octane rating of premium gas.
Using premium gas in your lawn mower won’t improve its performance or fuel efficiency. It may even increase your operating costs, as premium gas is typically more expensive than regular unleaded gasoline. Stick to the recommended octane rating specified in your mower’s manual and you’ll be good to go.
Can I use old gas in my lawn mower?
It’s not advisable to use old gas in your lawn mower. Over time, gasoline breaks down and its chemical composition changes. This can lead to gum and varnish buildup in your mower’s fuel system, which can clog fuel lines, restrict fuel flow, and ultimately cause engine problems.
If you have old gasoline, it’s best to dispose of it properly. You can check with your local waste management facility for instructions on how to safely discard old gasoline. Using fresh gasoline will help ensure that your lawn mower runs smoothly and efficiently.
Should I use gasoline with ethanol?
It’s best to avoid using gasoline with ethanol in your lawn mower. Ethanol can absorb moisture from the air, which can lead to condensation and corrosion in your fuel system. This can cause problems with fuel flow and engine performance. Additionally, ethanol can break down over time, forming deposits and gum that can clog fuel lines and injectors.
If you’re concerned about ethanol in your gasoline, look for fuel labeled “ethanol-free” or “re-refined gasoline.” These types of gasoline are typically blended with additives that help protect your mower’s fuel system from damage.
How often should I change the gas in my lawn mower?
It’s generally recommended to change the gas in your lawn mower every 30 days, especially during the off-season. This helps prevent the gas from degrading and causing problems with your mower’s fuel system. If you’re storing your lawn mower for an extended period, it’s best to drain the gas tank and run the engine until it stalls to clear any remaining fuel.
You can also consider adding a fuel stabilizer to your gas tank, which helps slow down the degradation process and extends the life of your gasoline. A fuel stabilizer is a good option if you don’t plan on using your mower for several weeks or months.
What do I do if my lawn mower won’t start?
If your lawn mower won’t start, the problem could be related to the fuel. First, check the fuel level and make sure you have enough fresh gas in the tank. If the gas is old, drain the tank and refill it with fresh gasoline. You can also check the fuel lines and filter for any blockages or debris.
If your lawn mower still won’t start, there may be other issues with the engine, such as a spark plug problem or a clogged carburetor. Consult your owner’s manual or seek help from a qualified mechanic.
How do I store my lawn mower for the winter?
When storing your lawn mower for the winter, it’s important to empty the fuel tank. Old gas can degrade and cause engine problems if left in the tank over the winter. Drain the tank and run the engine until it stalls to clear any remaining fuel. You should also clean the mower and store it in a dry, well-ventilated area.
Consider adding a fuel stabilizer to your gas tank before storing the mower, which helps prevent the gas from degrading and allows you to start your mower more easily in the spring. Remember to check the battery periodically and charge it as needed to ensure it doesn’t go dead.