Learning how to get gas out of a lawn mower is a fundamental skill for any homeowner. Safely removing fuel from the tank is necessary for storage or before attempting certain repairs. Whether you’re winterizing your equipment, fixing a carburetor, or simply dealing with old gas, the process is straightforward with the right tools and precautions.
This guide will walk you through several reliable methods. We’ll cover everything from basic siphoning to using the mower’s own fuel line. You’ll learn how to choose the best approach for your situation.
Following these steps will help you maintain your mower’s engine and avoid costly problems down the line. Let’s get started with the essential safety measures you must take before beginning.
How To Get Gas Out Of A Lawn Mower
Before you touch a single tool, safety is the absolute priority. Gasoline is highly flammable and its vapors are dangerous. Always work in a well-ventilated area, preferably outdoors and away from any source of heat, sparks, or open flames. Never smoke during this process.
Gather your materials first. Having everything ready makes the job quicker and safer. You will likely need safety glasses, gloves, a funnel, and approved fuel containers. A basic toolkit with screwdrivers and pliers is also helpful.
Place the mower on a flat, level surface. Ensure the engine is completely cool to the touch. If the mower was just running, wait at least 30 minutes for it to cool down. This prevents any chance of igniting fuel or burning yourself on hot components.
Essential Tools And Materials You Will Need
Having the correct supplies on hand is crucial for a smooth and safe fuel removal process. Here is a list of items you should collect:
- Approved Fuel Container: Use only a red plastic or metal container designed for gasoline storage. Never use makeshift containers like milk jugs or glass bottles.
- Safety Glasses and Gloves: Protect your eyes from splashes and your skin from prolonged gasoline contact.
- Hand Siphon Pump or Turkey Baster: These are the most common tools for manually removing fuel. A bulb siphon is very effective and affordable.
- Clean Rags or Paper Towels: For quick cleanup of any drips or spills.
- A Funnel: Helps pour gasoline from your collection pan or baster into the storage container without spilling.
- Socket Set or Wrench: Needed for methods that require removing the fuel line or the tank itself.
- A Drain Pan or Small Bucket: To catch fuel if you are draining from a disconnected line.
Method 1: Using A Hand Siphon Pump (The Easiest Way)
For most riders, using a manual siphon pump is the simplest and cleanest method. It requires no disassembly and gives you good control. These pumps are inexpensive and available at any auto parts store.
Follow these step-by-step instructions:
- Put on your safety glasses and gloves.
- Open the gas cap on your lawn mower’s fuel tank.
- Insert the longer tube of the siphon pump into the mower’s gas tank until it touches the bottom.
- Place the shorter tube into your approved fuel container.
- Pump the bulb on the siphon according to the manufacturer’s instructions. Usually, this involves squeezing it several times until you see fuel flowing steadily into your container.
- Once the tank is empty, remove the siphon tube and securely close both the fuel container and the mower’s gas cap.
This method is highly effective and minimizes the risk of spills. Just be sure to keep the outlet tube lower than the tank to maintain the siphon effect.
Method 2: The Turkey Baster Or Fluid Extractor
If you don’t have a siphon pump, a large turkey baster or a dedicated fluid extractor can work for smaller tanks. This is a practical solution for push mowers where the tank opening is easily accessible.
Here is how to do it:
- Ensure your turkey baster is clean and dedicated to this type of task. Do not use one from your kitchen.
- With the mower on a level surface, open the gas cap.
- Depress the bulb of the baster, insert the tube into the fuel, and slowly release the bulb to draw gas in.
- Transfer the extracted fuel into your storage container by squeezing the bulb over the funnel.
- Repeat this process until the tank is empty. It may take several repetitions for a full tank.
While simple, this method can be slow and may leave a small amount of fuel in the bottom of the tank. It’s best for nearly-empty tanks or for removing a final bit of old gas.
Method 3: Draining Via The Fuel Line (A More Technical Approach)
For a more complete drain, especially before repairs, you can disconnect the fuel line at the carburetor. This method ensures you get most of the fuel out of the system, not just the tank. It’s a bit more involved but very thorough.
Follow these steps carefully:
- Locate the fuel line. It is a small hose running from the bottom of the gas tank to the carburetor.
- Place your drain pan directly underneath the carburetor area.
- Using a clamp tool or pliers, pinch off the fuel line to stop the flow once you disconnect it. If there’s a fuel shut-off valve, turn it to the “off” position.
- Carefully loosen the clamp securing the fuel line to the carburetor nipple and gently pull the hose off.
- Direct the open end of the fuel line into your drain pan and release the clamp or open the shut-off valve. Allow the gasoline to drain completely.
- Once drained, you can also disconnect the line from the tank to ensure it’s empty. Reconnect all lines securely when finished.
This method is excellent for preventing old gas from sitting in the carburetor bowl, which is a common cause of starting issues. Be prepaired for a small mess and have your rags ready.
Method 4: Tilting The Mower (The Last Resort)
In a pinch, some people tilt the mower to pour the gas out. This is generally not recommended because it can be messy and risky. Gas can spill onto hot engine parts or the air filter, creating a fire hazard and damaging components.
If you must use this method, extreme caution is required. Always tip the mower so the gas cap side is facing upward, and the gas pours out from the opposite side of the engine and air filter. Use a funnel and container to catch the flow. Never tip a mower with a hot engine, and be aware that oil can leak into places it shouldn’t, potentially causing engine problems.
What To Do With The Gas After Removal
You’ve successfully removed the gasoline, but now you need to handle it properly. Do not pour it down a drain, on the ground, or into the trash. This is illegal and harmful to the environment.
If the gasoline is fresh (less than 30 days old) and uncontaminated, you can reuse it in another gasoline-powered engine, like your car. Mix it with at least a full tank of fresh gas to dilute it. For old or contaminated gas, you must dispose of it as hazardous waste. Contact your local recycling center, auto parts store, or fire department for guidance on where to take it in your community. Proper disposal is a critical final step.
Preventing Future Fuel Problems
The best way to avoid needing to remove gas is through proper mower maintenance. Using a fuel stabilizer is the single most effective step you can take. Add a stabilizer like STA-BIL to fresh gasoline before filling your mower’s tank, especially for the last mow of the season. This prevents the fuel from breaking down and forming varnish and gum that clogs the carburetor.
For long-term storage, such as over the winter, it’s actually best to either run the engine until the tank is completely empty or to fill the tank completely with treated fuel. A full tank prevents moisture condensation inside the tank, which leads to rust and corrosion. Choose one method and stick with it consistently every year.
Key Steps For Seasonal Storage
- Add fuel stabilizer to a full tank and run the engine for 5 minutes to circulate it, or
- Siphon or run the tank completely dry.
- Change the oil and clean the mower deck.
- Store the mower in a cool, dry place.
Frequently Asked Questions
How Do You Get Old Gas Out Of A Lawn Mower?
You get old gas out of a lawn mower using the same methods described above. A hand siphon pump is often the best tool. Old gas can be sludgy, so take your time. After removal, it’s crucial to dispose of the old gasoline properly at a hazardous waste facility and not reuse it in any engine.
Can I Drain The Gas From My Lawn Mower By Running It?
Yes, you can drain gas from a lawn mower by running the engine until it stalls. However, this leaves the carburetor bowl full of fuel, which can still evaporate and leave deposits. For a complete drain, it’s better to use a siphon or disconnect the fuel line after running the tank low.
What Is The Fastest Way To Remove Gasoline From A Small Engine?
The fastest way to remove gasoline from a small engine like a push mower is typically with a hand siphon pump. It requires no disassembly and can empty a tank in under a minute. For very small amounts, a fluid extractor or turkey baster is quick and convenient.
Is It Necessary To Remove Gas For Winter?
Yes, it is generally necessary to adress the fuel before winter storage. Leaving untreated gasoline in the tank over the winter is a leading cause of springtime starting failures. You should either remove the gas completely or fill the tank and add a stabilizer to prevent it from degrading.
How Long Can Gas Sit In A Lawn Mower?
Gasoline begins to degrade in as little as 30 days. Within three to six months, it can become stale and cause engine performance issues. Using a fuel stabilizer can extend this life to up to 24 months. For reliable operation, try not to let gas sit in your mower for more than one season without stabilization.