Can you pour old lawn mower gas down the drain? Absolutely not. Pouring old gasoline down drains, onto the ground, or into storm sewers is illegal and incredibly harmful to the environment. The best way to get rid of old mower gas is to take it to a hazardous waste facility or a recycling center that accepts it.
As the seasons change, many homeowners find themselves with leftover gasoline from their lawn mowers. This old fuel, if left sitting too long, can degrade and become less effective, or even cause damage to your mower’s engine. Properly disposing of this old fuel is crucial for both the longevity of your equipment and the health of our planet. This comprehensive guide will walk you through everything you need to know about lawn mower gas disposal, from how to safely remove gas from lawnmower to finding where to take old lawn mower fuel.
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Why Old Gas Needs Careful Disposal
Gasoline is a volatile and hazardous substance. Over time, it can degrade in several ways, impacting its performance and safety.
Fuel Degradation
- Oxidation: Exposure to air causes gasoline to oxidize, leading to the formation of gummy residues and varnish.
- Water Contamination: Gasoline can absorb moisture from the air. Water in fuel can cause rust in the fuel tank and lines, and can lead to poor engine performance.
- Ethanol Issues: Many modern fuels contain ethanol, which is hygroscopic (attracts water). This can accelerate corrosion and phase separation, where ethanol separates from the gasoline, creating a corrosive liquid.
Environmental Hazards
Improper disposal of gasoline can have severe environmental consequences:
- Soil and Water Contamination: Gasoline contains harmful chemicals that can leach into the soil and contaminate groundwater sources.
- Air Pollution: Burning gasoline improperly releases toxic fumes into the atmosphere, contributing to air pollution and greenhouse gas emissions.
- Fire Risk: Gasoline is highly flammable, and improper storage or disposal can create significant fire hazards.
Safely Removing Gas From Your Lawnmower
Before you can dispose of old fuel, you need to safely remove it from your lawnmower. There are several methods for how to drain old gas from a lawnmower, each with its own advantages.
Method 1: Using a Siphon Pump
This is a common and relatively safe method for disposing of gasoline from small engines.
What You’ll Need:
- A siphon pump (available at auto parts stores or hardware stores)
- An approved gasoline container (metal or plastic specifically designed for fuel)
- Gloves and eye protection
- Rags or paper towels
Steps:
- Preparation: Ensure the lawnmower engine is cool. Work in a well-ventilated area, away from open flames or sparks. Wear your gloves and eye protection.
- Position the Container: Place the approved gasoline container on the ground, lower than the lawnmower’s fuel tank.
- Insert the Hose: Submerge one end of the siphon hose into the lawnmower’s fuel tank. Make sure it reaches the bottom to draw out as much fuel as possible.
- Start the Siphon:
- Manual Siphon Pump: Most siphon pumps have a priming bulb. Squeeze the bulb repeatedly until fuel starts flowing into the container.
- Gravity Siphon: If using a basic hose, you might need to suck on the end that goes into the container to start the flow (be very careful not to ingest any fuel). Once fuel starts flowing, quickly remove the hose from your mouth and place it in the container.
- Continue Pumping: Allow the fuel to flow until the tank is empty or you’ve removed the desired amount.
- Cleanup: Carefully remove the siphon hose from the fuel tank and the container. Wipe up any spills with rags or paper towels. Seal the gasoline container securely.
Method 2: Draining Through the Fuel Line
Some lawnmowers have an accessible fuel line that can be disconnected.
What You’ll Need:
- Pliers or a fuel line clamp
- An approved gasoline container
- Gloves and eye protection
- Rags or paper towels
Steps:
- Preparation: Ensure the engine is cool and work in a well-ventilated area away from ignition sources. Wear protective gear.
- Locate the Fuel Line: Find the fuel line that connects the fuel tank to the carburetor.
- Clamp or Pinch the Line: Use pliers or a clamp to prevent fuel from flowing back into the tank.
- Disconnect the Line: Carefully disconnect the fuel line from the carburetor. Have your approved container ready to catch the fuel as it drains.
- Drain the Fuel: Allow the fuel to drain into the container. You may need to tilt the mower slightly to get all the fuel out.
- Reconnect and Clean: Once drained, reconnect the fuel line and secure it. Wipe up any spills.
Method 3: Using a Fuel Transfer Pump
Electric fuel transfer pumps offer a hands-free and efficient way to move fuel.
What You’ll Need:
- An electric fuel transfer pump
- Battery clips or a power source for the pump
- An approved gasoline container
- Gloves and eye protection
- Rags or paper towels
Steps:
- Preparation: Ensure the engine is cool and work in a well-ventilated area. Wear protective gear.
- Connect the Pump: Place the intake hose into the lawnmower’s fuel tank and the outlet hose into your approved container. Connect the pump to its power source.
- Operate the Pump: Turn on the pump and allow it to transfer the fuel until the tank is empty.
- Cleanup: Disconnect the pump, secure the container, and clean up any spills.
Lawnmower Fuel Recycling and Disposal Options
Once you’ve safely removed the old gas, the next crucial step is old fuel disposal for mowers. Simply throwing it away is not an option.
Option 1: Hazardous Waste Collection Sites
The most environmentally responsible way to dispose of old gasoline is to take it to a designated hazardous waste collection facility.
- How it Works: These facilities are equipped to handle and process hazardous materials like gasoline safely. They often operate on specific days or have drop-off locations.
- Finding a Location:
- Local Government Website: Check your city or county’s official website, often under public works, sanitation, or environmental services.
- Recycling Centers: Many recycling centers that handle other types of waste also accept hazardous household materials.
- Earth911.com: This website provides a searchable database of recycling and disposal locations across the United States.
- Preparation: Always store the old gas in a sealed, approved container before transporting it. Check the facility’s specific guidelines for accepted quantities and types of fuel.
Option 2: Retailer Take-Back Programs
Some retailers that sell gasoline-powered equipment or automotive fluids may offer take-back programs for old fuel.
- How it Works: This is less common for gasoline but worth investigating with local auto parts stores or small engine repair shops.
- Verification: Call ahead to confirm if they accept old lawn mower fuel and what their procedures are.
Option 3: Used Oil Collection Sites (Limited Acceptance)
While primarily for used motor oil, some used oil collection sites may accept small quantities of gasoline.
- Important Note: This is highly variable. Never assume they accept gasoline. Always call and verify before bringing any fuel. They may have strict policies against it due to fire risks and disposal regulations.
Option 4: Lawnmower Fuel Recycling Programs
Some communities or specialized companies offer lawnmower fuel recycling services.
- How it Works: These programs collect old fuel and process it for reuse or safe disposal.
- Finding Programs: Again, your local government or environmental agency is the best starting point to see if such programs exist in your area.
What NOT To Do With Old Lawn Mower Gas
It’s equally important to know what to avoid when dealing with old gasoline.
Never Do These Things:
- Pour it Down Drains: This includes sinks, toilets, or storm drains. It contaminates water systems and can harm aquatic life.
- Pour it on the Ground: This pollutes soil and can seep into groundwater.
- Burn It: Open burning of gasoline is dangerous, illegal in most areas, and releases toxic pollutants into the air.
- Mix it with New Fuel: While small amounts of slightly stale fuel might be usable in some engines, mixing significantly degraded fuel with fresh fuel is generally not recommended and can lead to poor performance or engine damage.
- Dispose of it in Household Trash: Gasoline is a hazardous waste and should never be placed in regular garbage bins.
Storing Gasoline Safely for Future Use
If your gasoline isn’t too old and you anticipate needing it again, proper storage is key. This is a good alternative to immediate lawnmower gas disposal methods.
Best Practices for Gasoline Storage:
- Use Approved Containers: Always store gasoline in containers specifically designed and approved for fuel. These are typically made of metal or a special type of plastic that resists degradation from fuel.
- Seal Tightly: Ensure the container is tightly sealed to prevent evaporation and moisture absorption.
- Cool, Dry, Ventilated Area: Store containers in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, or ignition sources (furnaces, water heaters, sparks, open flames). A detached shed or garage is usually a good choice.
- Never Store Indoors: Do not store gasoline in your home, basement, or attached garage due to the extreme fire risk.
- Use Fuel Stabilizer: For gasoline you plan to store for more than 30 days, use a fuel stabilizer. Add it to the fuel as soon as possible after purchase. It helps prevent degradation and keeps the fuel viable for longer.
- Regular Rotation: If you store gasoline, try to use it within 6-12 months (even with stabilizer, though it extends this considerably) and replace it with fresh fuel to ensure you always have the best quality fuel for your equipment.
When is Gas “Too Old” to Use?
Gasoline has a shelf life. If left untreated, it typically starts to degrade significantly after about 3-6 months. Ethanol-blended fuels can degrade faster, sometimes within 1-3 months if not properly stabilized.
Signs of Old, Degraded Gas:
- Cloudy Appearance: Fresh gasoline is clear or has a slight yellow tint. Old gas may appear cloudy or have a darker hue.
- Separation: You might see layers in the container if water has separated from the fuel or if ethanol has phased out.
- Foul Odor: Degraded gasoline can develop a varnish-like or sour smell.
- Engine Problems: If your mower runs poorly, sputters, or won’t start after filling up with the questionable fuel, it’s a strong indicator the gas is bad.
If you’re unsure, it’s always safer to assume the gas is too old for your lawnmower and dispose of it properly.
Best Practices for Disposing of Flammable Liquids from Yard Equipment
Disposing of flammable liquids from yard equipment, like gasoline, requires adherence to strict safety and environmental protocols.
Key Principles:
- Prioritize Safety: Always handle gasoline with care. Wear appropriate personal protective equipment (PPE) and work in a safe environment.
- Containment: Use only approved containers for storing and transporting gasoline.
- Ventilation: Ensure good airflow when handling gasoline to prevent the buildup of flammable vapors.
- Avoid Ignition Sources: Keep gasoline far away from sparks, flames, and hot surfaces.
- Environmental Responsibility: Never release gasoline into the environment. Utilize designated disposal channels.
Frequently Asked Questions (FAQ) about Old Mower Gas
Here are some common questions homeowners have about dealing with old lawn mower fuel:
Q1: Can I use old gas from last year in my lawn mower?
A1: It depends on how it was stored. If it was in an unsealed container, exposed to air and moisture, it’s likely degraded and should be disposed of. If it was stored in a sealed, approved container with a fuel stabilizer, it might still be usable, but it’s best to check for signs of degradation.
Q2: Is it safe to mix old gas with new gas?
A2: It’s generally not recommended, especially if the old gas is significantly degraded or contaminated. While a very small amount of slightly stale gas might not cause immediate harm, mixing in larger quantities can lead to poor engine performance, starting issues, and potential damage to the carburetor or fuel system.
Q3: Where can I find a hazardous waste disposal site near me?
A3: Your best bet is to check your local government’s website (city or county), look for local recycling center information, or use online resources like Earth911.com to find designated drop-off locations.
Q4: What happens if I pour old gas down the drain?
A4: Pouring gasoline down any drain is illegal and harmful. It can contaminate water supplies, kill aquatic life, damage plumbing systems, and pose a fire risk in sewer systems.
Q5: How should I transport old gasoline to a disposal site?
A5: Transport old gasoline in a sealed, approved fuel container. Secure the container in your vehicle to prevent tipping or spilling. Avoid transporting large quantities at once. Check with the disposal facility for any specific transport guidelines they may have.
Q6: Can I use a wet/dry vacuum to remove gas from my lawn mower?
A6: No, never use a regular household vacuum or shop vac to suck up gasoline. These vacuums are not designed for flammable liquids and can create a spark, leading to an explosion or fire. Only use equipment specifically designed for fuel transfer, like siphon pumps.
Q7: How do I dispose of a lawn mower with old gas still in the tank?
A7: If you are disposing of the entire lawn mower, you should first attempt to drain as much fuel as possible using the methods described above. Then, contact your local waste management or recycling center. Many will not accept gasoline-powered equipment with fuel still in the tank. They may require you to drain it or have specific procedures for handling such items.
By following these guidelines, you can ensure that your old lawn mower gas is handled responsibly, protecting both your equipment and the environment. Remember, proper disposal is a key part of maintaining your yard equipment and being a good environmental steward.