Removing old gas from a lawn mower is essential. It helps maintain performance and extend the machine’s life.
Old gas can cause several issues, including clogging the carburetor and making the engine hard to start. If neglected, it can damage your lawn mower over time. Proper maintenance ensures your mower runs smoothly and efficiently. In this guide, we will explore simple steps to safely remove old gas.
You’ll learn how to avoid common pitfalls and keep your mower in top shape. Whether you’re a seasoned gardener or a weekend warrior, this easy-to-follow process will help you maintain your equipment. Let’s dive into the details and get your lawn mower running like new.

Tools And Materials Needed
Getting old gas out of a lawn mower can seem daunting. Having the right tools and materials simplifies the process. Below, we outline the essential and optional tools for the job.
Essential Tools
To remove old gas from a lawn mower, you need a few basic tools. These tools ensure you can do the job safely and efficiently.
- Fuel siphon pump: A manual pump helps in removing gas from the tank.
- Gas can: Use a clean gas can to store the old gas.
- Rags: Keep rags handy to clean up spills and wipe surfaces.
- Safety gloves: Protect your hands from fuel exposure and possible skin irritation.
- Safety goggles: Shield your eyes from splashes and fumes.
Optional Tools
Some additional tools can make the process easier. Though not mandatory, they enhance safety and efficiency.
- Funnel: Assists in pouring the old gas into the can without spilling.
- Flashlight: Provides better visibility inside the tank.
- Wrench set: Useful for loosening any tight connections or bolts.
- Fuel stabilizer: Helps in treating any remaining fuel in the tank.
- Disposable container: For any debris or residue collected during the process.
Preparing The Lawn Mower
Getting old gas out of a lawn mower is important. Stale gas can harm the engine. Proper preparation is key. Follow these steps to ensure safety and efficiency.
Safety Precautions
Safety is the top priority. Before starting, make sure the mower is in a well-ventilated area. This will reduce the risk of inhaling fumes. Wear protective gloves to avoid contact with gas. Keep a fire extinguisher nearby. This is crucial in case of an emergency.
- Ensure the area is well-ventilated.
- Wear protective gloves.
- Keep a fire extinguisher nearby.
Positioning The Mower
Proper positioning of the mower makes the process easier. Place the mower on a flat, stable surface. This prevents it from tipping over. Ensure the mower is turned off and cool. This will prevent burns and accidents.
- Place the mower on a flat surface.
- Ensure the mower is turned off.
- Wait for the mower to cool down.
By following these steps, you can safely prepare your lawn mower for gas removal.
Draining The Gas Tank
Draining the gas tank is an essential step in maintaining your lawn mower. Old gas can clog the engine and reduce its efficiency. Let’s explore the steps to drain the gas tank safely and effectively.
Using A Siphon Pump
A siphon pump is a handy tool for removing gas from the tank. Here’s how to use it:
- Place the lawn mower on a flat surface.
- Insert one end of the siphon pump into the gas tank.
- Place the other end in a gas container.
- Use the pump to transfer the gas to the container.
- Ensure all gas is removed from the tank.
Tip: Always wear gloves to protect your hands from gas.
Manual Drainage
If you don’t have a siphon pump, you can drain the gas manually. Follow these steps:
- Place the lawn mower on a flat surface.
- Find the gas tank and locate the drain plug at the bottom.
- Place a gas container below the drain plug.
- Remove the drain plug carefully.
- Let the gas flow into the container.
- Replace the drain plug once the tank is empty.
Warning: Ensure the engine is cool before draining the gas to avoid accidents.

Cleaning The Gas Tank
Cleaning the gas tank of your lawn mower is essential for its proper functioning. Old gas can clog the engine and cause performance issues. This section will guide you through the steps of cleaning your gas tank effectively.
Removing Residual Gas
First, you need to remove any residual gas from the tank. Follow these steps:
- Turn off the lawn mower and let it cool down completely.
- Locate the gas cap and remove it carefully.
- Using a siphon pump, extract the old gas into a suitable container.
- Dispose of the old gas according to your local hazardous waste regulations.
Rinsing The Tank
Once the old gas is removed, you need to rinse the tank to remove any remaining residue. Follow these steps:
- Fill the tank with a small amount of fresh gasoline.
- Swirl the gasoline around to loosen any dirt or debris.
- Pour out the gasoline into a container for proper disposal.
- Repeat the process until the tank is clean.
After rinsing, your gas tank should be free of old gas and ready for fresh fuel. This ensures your lawn mower runs smoothly and efficiently.
Checking The Fuel Line
Checking the fuel line is crucial when removing old gas from your lawn mower. A clean and functional fuel line ensures your mower runs smoothly. This section will guide you through inspecting and cleaning the fuel line.
Inspecting For Damage
First, check the fuel line for any visible damage. Look for cracks, leaks, or wear and tear. These issues can affect fuel flow and mower performance. If you find any damage, replace the fuel line immediately.
Cleaning The Fuel Line
If the fuel line is in good condition, proceed to clean it. Remove the fuel line from the mower carefully. Use a small brush or compressed air to clear out any debris. Clean fuel lines ensure a smooth fuel flow and optimal mower performance.

Refilling With Fresh Gas
Refilling your lawn mower with fresh gas is an essential step. It ensures that your mower runs smoothly and efficiently. Old gas can lead to poor performance and potential damage. Follow these steps to refill your lawn mower with fresh gas.
Selecting The Right Gas
Choosing the right gas is crucial for your lawn mower. Always use fresh, clean gasoline. Avoid gas with ethanol, as it can harm your mower’s engine. Check your mower’s manual for specific gas requirements. Most mowers use regular unleaded gasoline.
Filling The Tank
Before filling, make sure the tank is empty. Use a siphon pump to remove any old gas. Place the siphon pump into the tank and drain all the old gas. Dispose of the old gas properly, following local regulations.
Once the tank is empty, fill it with fresh gasoline. Use a clean, approved gas container. Slowly pour the gas into the tank to avoid spills. Fill the tank to the recommended level, not to the brim. Secure the gas cap tightly to prevent leaks.
After refilling, start your lawn mower. Let it run for a few minutes to circulate the fresh gas. This helps ensure smooth operation and efficient performance.
Maintenance Tips
Maintaining your lawn mower ensures its longevity and efficiency. Removing old gas is a key task. It keeps your mower running smoothly. Here are some easy-to-follow tips.
Regular Gas Replacement
Change the gas in your mower regularly. Old gas can clog the carburetor. It causes the mower to run poorly. Use fresh gas each season. This prevents buildup and damage. Always use the correct fuel type. Check your mower’s manual for details.
Storing The Mower
Proper storage of your mower is crucial. Store it in a dry place. This prevents rust and corrosion. Before storage, empty the gas tank. Use a siphon pump to remove old gas. This keeps the tank clean and ready for fresh fuel. Also, clean the mower’s exterior. Remove grass clippings and debris. This helps maintain its condition.
Frequently Asked Questions
How Do I Remove Old Gas From A Lawn Mower?
To remove old gas, use a siphon pump. Place one end in the gas tank and the other in a gas can. Pump until the tank is empty. Dispose of the old gas properly.
Can Old Gas Damage A Lawn Mower?
Yes, old gas can damage the engine. It can cause starting issues and poor performance. Always use fresh gas to ensure optimal operation.
What Tools Are Needed To Remove Old Gas?
You’ll need a siphon pump and a gas can. The siphon pump helps transfer the gas, and the gas can is for storing the old fuel.
How Often Should I Change The Gas In My Lawn Mower?
Change the gas every season. Old gas can degrade over time, leading to engine problems. Fresh gas ensures your lawn mower runs smoothly.
Conclusion
Removing old gas from your lawn mower is essential for maintenance. Follow the steps outlined to ensure your mower runs smoothly. Remember to safely dispose of the old gas. Regularly check and replace fuel to avoid engine problems. This simple task saves time and money in the long run.
Keep your lawn mower in top shape for a beautiful, well-maintained yard. Happy mowing!

