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Gasoline left sitting in a lawn mower for extended periods can become stale, causing starting problems and potentially damaging the engine. Removing the old gas is a crucial part of lawn mower maintenance. This guide provides detailed instructions on how to safely and effectively drain the gas from your lawn mower, ensuring its longevity and optimal performance.
Why You Need to Remove Gas from Your Lawn Mower
Leaving gasoline in your lawn mower over the off-season or for long durations between uses can lead to several problems. Understanding these issues can help you appreciate the importance of proper fuel management.
The Stale Gas Problem
Gasoline is a volatile substance that degrades over time. As it sits, it begins to oxidize and evaporate, leading to a loss of its original combustion properties. This stale gas can clog the carburetor and fuel lines, making it difficult or impossible to start the lawn mower.
The Formation of Gum and Varnish
As gasoline deteriorates, it can form gum and varnish deposits inside the fuel system. These sticky residues can accumulate in the carburetor jets, fuel lines, and fuel tank, restricting fuel flow and causing performance issues. They also attract dirt and debris.
Potential Engine Damage
Stale gas and gum buildup can lead to serious engine damage if left unattended. The carburetor is a critical component, and if it becomes clogged, it can cause the engine to run lean (too little fuel). This can result in overheating and potentially damage to the piston and cylinder.
Ethanol’s Impact
Many gasoline blends contain ethanol, which is an alcohol-based additive. Ethanol can absorb moisture from the air, leading to water contamination in the fuel tank. This water can corrode metal parts and further contribute to gum and varnish formation. Moreover, ethanol can separate from the gasoline over time, a process known as phase separation, which results in a layer of water and ethanol at the bottom of the tank, preventing the mower from running.
Safety First: Preparing to Remove the Gas
Safety should be your top priority when dealing with gasoline. Gasoline is flammable, and its vapors can be harmful. Before you begin, take the following precautions:
Work in a Well-Ventilated Area
Always drain the gas outdoors or in a garage with open doors and windows to allow for proper ventilation. Avoid working in enclosed spaces where fumes can accumulate.
Wear Protective Gear
Protect your eyes and skin from gasoline exposure. Wear safety glasses or goggles to prevent splashes and chemical-resistant gloves to avoid skin irritation. Old clothing is also advisable.
Avoid Open Flames and Sparks
Gasoline is highly flammable, so keep it away from open flames, sparks, and heat sources. This includes cigarettes, lighters, and power tools that could generate sparks. Make sure the lawn mower is cool.
Have a Spill Kit Ready
Keep absorbent materials, such as rags or kitty litter, nearby to clean up any spills promptly. Also, have a container of water and soap available for washing your hands and any contaminated surfaces.
Know Your Mower
Familiarize yourself with your lawn mower’s manual. It will provide specific instructions for your model and may include diagrams or safety warnings. This will also tell you the exact fuel type required for your mower.
Methods for Removing Gas from Your Lawn Mower
There are several ways to remove gas from a lawn mower. Choose the method that best suits your equipment and comfort level.
Method 1: Using a Fuel Stabilizer and Running the Engine Dry
This is the easiest method and is best suited for short storage periods (a month or two).
Adding Fuel Stabilizer
Pour a fuel stabilizer into the gas tank. Follow the manufacturer’s instructions for the correct amount. Fuel stabilizers prevent the gas from breaking down and forming gum and varnish. This is a preventative measure, not a way to remove existing stale gas.
Running the Engine
Start the lawn mower and let it run until it stalls. This will ensure that any fuel remaining in the carburetor and fuel lines is used up. Continue to attempt to start the mower until it no longer starts. This ensures the mower is essentially empty of gas.
Important Note
This method only works if the fuel is relatively fresh. If the gas has been sitting for several months and the mower is not starting, you’ll need to use one of the other methods.
Method 2: Siphoning the Gas
Siphoning involves using a hose to draw the gas out of the tank.
Obtain a Siphon Hose
Purchase a siphon hose specifically designed for gasoline. These hoses are typically made of flexible plastic and have a hand pump or squeeze bulb to initiate the siphoning process. Avoid using a regular garden hose, as it can react with the gasoline.
Position the Lawn Mower
Place the lawn mower on a level surface. Position the gas can lower than the fuel tank. This will allow gravity to assist with the siphoning process.
Insert the Siphon Hose
Insert one end of the siphon hose into the gas tank, making sure it reaches the bottom. Place the other end of the hose into the approved gas can.
Start the Siphon
Use the hand pump or squeeze bulb on the siphon hose to create suction and start the gas flowing. Ensure the gas can is placed safely away from any potential ignition sources.
Monitor the Flow
Carefully monitor the gas flow and stop the siphoning process when the tank is empty. Avoid overfilling the gas can.
Dispose of the Gas Properly
Take the used gasoline to a local recycling center or hazardous waste disposal facility. Do not pour it down the drain or onto the ground.
Method 3: Using a Fuel Line Clamp and Drain Hose
This method allows for a more controlled draining process.
Locate the Fuel Line
Identify the fuel line that connects the fuel tank to the carburetor. Refer to your lawn mower’s manual if needed.
Clamp the Fuel Line
Use a fuel line clamp (available at auto parts stores) to pinch off the fuel line between the tank and the carburetor. This will prevent gas from flowing out unintentionally when you disconnect the line.
Attach a Drain Hose
Place one end of a drain hose over the open end of the fuel line. Direct the other end of the hose into an approved gas can.
Release the Clamp
Carefully release the fuel line clamp, allowing the gas to flow into the gas can.
Monitor the Flow
Watch the gas flow and stop the draining process when the tank is empty. Re-clamp the fuel line.
Dispose of the Gas Properly
As with siphoning, take the used gasoline to a local recycling center or hazardous waste disposal facility.
Method 4: Using the Carburetor Drain Plug
This method drains the gas directly from the carburetor. This is usually the most thorough method, ensuring that stale gas is removed from all parts of the fuel system.
Locate the Carburetor Drain Plug
The carburetor drain plug is usually a small screw or bolt located on the bottom of the carburetor bowl. Consult your lawn mower’s manual for the exact location.
Place a Container Under the Carburetor
Place a small container or pan under the carburetor to catch the draining gas.
Loosen the Drain Plug
Using a wrench or screwdriver, carefully loosen the carburetor drain plug. Do not remove it completely; just loosen it enough to allow the gas to flow out.
Allow the Gas to Drain
Let the gas drain from the carburetor bowl into the container.
Tighten the Drain Plug
Once the gas has drained completely, tighten the carburetor drain plug.
Start the Mower (If Needed)
If you used a siphon or fuel line disconnect, and the mower doesn’t readily start, you might need to prime the carburetor by pressing the primer bulb a few times.
Cleaning Up and Storing Your Lawn Mower
After you’ve successfully removed the gas, there are a few additional steps you should take to ensure your lawn mower is properly stored.
Clean Up Spills
Use absorbent materials, such as rags or kitty litter, to clean up any spills immediately. Dispose of the soiled materials properly.
Run the Engine Briefly (Optional)
After draining the gas, you can start the engine briefly (for a few seconds) to burn off any residual fuel in the carburetor. This is especially useful if you are storing the lawn mower for an extended period.
Store the Lawn Mower Properly
Store the lawn mower in a dry, sheltered location, away from direct sunlight and extreme temperatures. Cover it with a tarp or lawn mower cover to protect it from dust and debris.
Consider Fuel Stabilizer for Storage
Even after draining the tank, trace amounts of fuel can remain in the system. Adding fuel stabilizer to the tank before storage can help prevent future gum and varnish buildup. Make sure to follow the instructions on the fuel stabilizer bottle for proper usage.
Dealing with Difficult Situations
Sometimes, removing gas from a lawn mower can be challenging. Here are some tips for dealing with common problems:
Gas Tank is Difficult to Access
If the gas tank is difficult to reach with a siphon hose, try using a longer hose or a flexible extension. You may also need to tilt the lawn mower slightly to get better access.
Carburetor Drain Plug is Stuck
If the carburetor drain plug is stuck, try spraying it with a penetrating oil, such as WD-40, and let it sit for a few minutes before attempting to loosen it again. Use the correct size wrench to avoid stripping the plug.
Engine Won’t Start After Draining
If the engine won’t start after draining the gas, it may be due to an airlock in the fuel line or a dry carburetor. Try priming the carburetor by pressing the primer bulb several times. You may also need to check the spark plug to ensure it is clean and properly gapped. A small amount of starter fluid can also help.
Preventative Maintenance
Performing regular maintenance on your lawn mower can prevent fuel-related issues in the first place. This includes changing the air filter, spark plug, and oil on a regular basis. It’s also a good idea to inspect the fuel lines and carburetor for any signs of leaks or damage. This proactive approach will ensure your mower runs smoothly.
Removing gas from your lawn mower is a simple yet essential task that can prolong its life and ensure reliable performance. By following the safety precautions and choosing the appropriate method, you can effectively drain the fuel and prepare your lawn mower for storage. Regular maintenance and preventative measures, such as using fuel stabilizer, will help keep your lawn mower running smoothly for years to come. Remember to always prioritize safety when working with gasoline, and dispose of used fuel properly.
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Why is it necessary to remove gas from my lawn mower?
Removing gasoline from your lawn mower is crucial for several reasons. Firstly, gasoline can degrade over time, especially when left sitting unused for extended periods like during the off-season. This degradation can lead to gum and varnish buildup in the carburetor and fuel lines, causing starting problems and poor engine performance.
Secondly, old gasoline can become less volatile and more prone to attracting moisture. This moisture can lead to rust and corrosion in the fuel system, further damaging the engine. Removing the fuel before storage prevents these issues and ensures your mower starts easily and runs smoothly when you need it.
When is the best time to remove gas from my lawn mower?
The ideal time to remove gas from your lawn mower is before storing it for an extended period, typically at the end of the mowing season. If you know you won’t be using the mower for more than a month or two, it’s wise to remove the fuel to prevent it from deteriorating.
However, if you plan on using your mower relatively soon (within a few weeks), removing the gas might not be necessary, especially if you use a fuel stabilizer. Always consult your lawn mower’s owner’s manual for specific recommendations regarding fuel storage and maintenance schedules.
What tools do I need to safely remove gas from my lawn mower?
You will need a few essential tools for safe and effective fuel removal. A fuel siphon or hand pump is crucial for transferring the gasoline from the tank to a suitable storage container. Safety glasses and gloves are mandatory to protect your eyes and skin from potential fuel splashes and fumes.
Additionally, you’ll need a gas can that is specifically designed for storing gasoline and is approved by a reputable testing agency. A funnel can also be beneficial for directing the fuel into the storage container and preventing spills. Ensure you have absorbent rags readily available to clean up any minor spills that might occur during the process.
Where should I perform the gas removal process?
The gas removal process should always be performed outdoors in a well-ventilated area. This helps to dissipate gasoline fumes and reduces the risk of fire or explosion. Avoid working near any open flames, sparks, or other sources of ignition.
Make sure the area is clear of any flammable materials, such as dry leaves or grass. It’s also a good idea to perform this task on a flat, stable surface to prevent the mower from tipping over during the process. Consider the environmental impact and choose a location where spills can be easily contained and cleaned up.
How do I properly dispose of the gasoline I remove from my lawn mower?
Proper disposal of old gasoline is essential for environmental safety and compliance with regulations. Never pour gasoline down drains, into the ground, or into the trash. These actions can contaminate water supplies and pose serious environmental hazards.
The best way to dispose of old gasoline is to take it to a local hazardous waste collection facility or a designated recycling center. Many auto parts stores and gas stations also offer gasoline disposal services. Check with your local municipality or environmental agency for specific guidelines and locations in your area.
What if my lawn mower doesn’t have a fuel shut-off valve?
If your lawn mower lacks a fuel shut-off valve, you will need to use a fuel siphon or hand pump to remove the gasoline. Insert the siphon hose into the fuel tank and carefully pump or siphon the fuel into an approved gas can.
Alternatively, some mowers allow you to disconnect the fuel line from the carburetor and drain the fuel in that manner. However, this method can be messier and requires careful attention to prevent spills. Always consult your owner’s manual for specific instructions applicable to your mower model.
Can I add fuel stabilizer instead of removing the gas?
Yes, adding fuel stabilizer to the gasoline in your lawn mower’s tank is a viable alternative to complete fuel removal, especially if you plan to use the mower again within a few months. Fuel stabilizer prevents the gasoline from breaking down and forming gum and varnish, extending its shelf life.
Follow the instructions on the fuel stabilizer bottle for the correct dosage. It’s generally recommended to add the stabilizer to fresh gasoline and then run the engine for a few minutes to circulate the treated fuel throughout the fuel system. This method can be a convenient way to preserve your fuel system during short periods of inactivity.