The warm weather has arrived, and you’re ready to tackle your overgrown lawn. You pull out your trusty lawnmower, give it a few pulls, and… nothing. The engine sputters, coughs, and refuses to fire. Frustration sets in, and you start wondering – could the age of your gas be the culprit? This article will delve into the world of gasoline degradation, exploring how old gas affects your lawnmower and offering practical advice to get your mower running smoothly again.
In short, yes, old gasoline can definitely make your lawnmower difficult or impossible to start. Gasoline is a volatile substance, and over time it breaks down and loses its ability to ignite properly. This breakdown process leads to a decrease in the fuel’s octane rating and the formation of harmful deposits within the engine.
Understanding Gasoline Degradation
The Chemistry Behind the Problem
Gasoline is a complex mixture of hydrocarbons. When exposed to air and light, these hydrocarbons undergo chemical reactions, forming various byproducts like gum, varnish, and other deposits. These deposits can clog fuel lines, carburetor jets, and other vital components of your lawnmower’s engine, leading to reduced fuel flow and ultimately, a no-start situation.
The Impact of Time
The rate at which gasoline degrades depends heavily on several factors:
- Storage conditions: Improper storage (exposure to air, light, and heat) accelerates the degradation process.
- Fuel additives: Modern gasoline often contains stabilizers that slow down the breakdown process. However, even with stabilizers, gasoline can start to degrade after 30-60 days.
- Seasonality: Summer blends of gasoline typically contain higher concentrations of volatile hydrocarbons, making them more susceptible to degradation than winter blends.
Recognizing the Symptoms of Old Gas
Here are some telltale signs that your lawnmower might be struggling with old gas:
- Difficult starting: The engine may sputter, cough, or hesitate to start.
- Loss of power: The lawnmower may experience a noticeable decrease in power or struggle to maintain a consistent speed.
- Rough idling: The engine may idle unevenly or stall frequently.
- Fuel odor: You may notice a strong gasoline smell emanating from the fuel tank or engine.
Solutions for Old Gas Problems
1. Drain and Replace the Fuel
If you suspect old gas is the issue, the most effective solution is to drain the fuel tank and replace it with fresh gasoline. Here’s how:
- Locate the fuel tank: The fuel tank is usually located on the side or top of the lawnmower.
- Open the fuel valve: Most lawnmowers have a fuel valve that controls the flow of fuel to the engine. Locate and open this valve.
- Drain the fuel: Use a siphon pump or a clean container to safely remove the fuel from the tank.
- Refill the tank: Once the tank is empty, carefully add fresh, high-quality gasoline.
- Run the engine: Start the engine and let it run for a few minutes to ensure the fuel lines are clear.
2. Use a Fuel Stabilizer
To prevent gasoline degradation in the future, consider using a fuel stabilizer. Fuel stabilizers are designed to slow down the oxidation process and prevent the formation of harmful deposits.
- Choose a quality stabilizer: Look for a stabilizer specifically designed for gasoline engines.
- Follow the instructions: Each stabilizer will have its own recommended dosage and application method.
- Add stabilizer regularly: It’s best to add stabilizer every time you refill your fuel tank.
3. Clean the Fuel System
If the engine is still having problems after draining and replacing the fuel, it’s possible that the fuel system has been contaminated by deposits. Cleaning the fuel system may be necessary:
- Carburetor cleaning: Remove the carburetor and thoroughly clean it using a carburetor cleaner. Pay special attention to the jets and passages.
- Fuel lines and filter: Inspect the fuel lines and filter for any signs of blockage or contamination. Replace any damaged or clogged parts.
Important Note: Consult your lawnmower’s owner’s manual for specific instructions on cleaning the fuel system. Improper cleaning can damage your mower.
Preventing Future Gas Problems
1. Use Fresh Gas
Always use fresh gasoline in your lawnmower. Avoid storing gasoline for extended periods, and try to use up any remaining fuel within a few weeks.
2. Store Gasoline Properly
If you need to store gasoline, follow these tips:
- Choose an appropriate container: Use a clean, airtight container specifically designed for gasoline.
- Keep it cool and dry: Store gasoline in a cool, dry place away from direct sunlight and heat sources.
- Add a stabilizer: Always add a fuel stabilizer to prevent the gasoline from degrading.
- Label the container: Clearly label the container with the date the gasoline was added and the type of fuel (regular, premium, etc.).
3. Regular Maintenance
Regular maintenance can help prevent fuel-related problems.
- Check the fuel lines and filter: Inspect these components for any signs of damage, leaks, or clogging.
- Change the air filter: A dirty air filter can restrict airflow, leading to engine problems.
- Service the carburetor: Regularly service the carburetor to ensure it is properly adjusted and clean.
Conclusion
Old gas can be a significant obstacle to getting your lawnmower running smoothly. By understanding the impact of gasoline degradation and taking preventative measures, you can avoid fuel-related problems and keep your lawnmower in top condition.
Remember, using fresh gasoline, storing fuel properly, and employing regular maintenance are essential for the longevity and performance of your lawnmower.
FAQs
What happens to old gas?
Old gasoline degrades over time, becoming less volatile and evaporating. This leaves behind a gummy residue that can clog the fuel lines, carburetor, and other parts of your lawnmower’s engine. When the engine doesn’t receive a sufficient fuel supply, it can’t start properly.
In addition to gumming up the engine, old gasoline can also attract moisture, leading to corrosion and further clogging. This can cause various issues, including difficulty starting, sputtering, and ultimately, engine failure.
How long does gas last in a lawnmower?
The shelf life of gasoline varies depending on factors like storage conditions, fuel additives, and the type of fuel itself. Generally, gasoline can be considered good for up to 3 months if stored properly in a cool, dry place and away from direct sunlight.
However, for optimal performance and engine longevity, it’s recommended to use gasoline within a month of purchase. If you’re storing gasoline for extended periods, consider using fuel stabilizer to prevent degradation and extend its lifespan.
How can I tell if my gas is bad?
One way to identify bad gasoline is by its appearance and smell. Old gas tends to have a darker color and a strong, pungent odor, unlike fresh gasoline. Another sign is the presence of sediment or debris in the fuel tank.
You can also perform a simple test by smelling the gas. If it smells like varnish or paint thinner, it’s likely old and should be replaced. However, it’s best to err on the side of caution and replace any gasoline that has been sitting for more than a month.
Can I clean the gas out of my mower?
Yes, you can clean out the old gasoline from your lawnmower. You can do this by draining the fuel tank, carburetor, and fuel lines. You may need to remove the carburetor and clean it thoroughly, using a carburetor cleaner spray.
While draining the old fuel is the first step, it’s also crucial to address any leftover residue. Using a fuel system cleaner can effectively remove stubborn deposits and restore optimal fuel flow. This can help prevent future issues related to old gasoline.
Should I use fuel stabilizer?
Fuel stabilizer is a chemical additive that helps to prevent gasoline from degrading. It can extend the life of gasoline for up to a year, allowing you to store fuel for longer periods without worrying about it going bad.
Using fuel stabilizer is particularly recommended for winter storage, when you won’t be using your lawnmower regularly. It can help ensure that your engine starts smoothly and efficiently the next time you need it.
Can I use old gas in a car?
It’s generally not recommended to use old gas in your car. Although cars have fuel filters that can trap some debris, old gasoline can still cause issues. It can clog injectors, reduce engine performance, and potentially lead to long-term damage.
For your car’s optimal performance and longevity, use fresh gasoline and consider using fuel stabilizer if you’re planning to store fuel for an extended period.
What should I do if my lawnmower won’t start?
If your lawnmower won’t start, it’s important to troubleshoot the problem. Check the fuel lines, carburetor, and fuel tank for clogs or debris. If you suspect old gasoline is the culprit, drain the tank and replace it with fresh fuel.
If the problem persists, consult your lawnmower’s manual or seek assistance from a qualified mechanic. They can help diagnose the issue and provide the necessary repairs to ensure your lawnmower runs smoothly.