How To Remove Old Gas In Lawn Mower: Effective Solutions

Quick Answer: To get rid of old gas in your lawn mower, you can either siphon it out or use a fuel stabilizer to ensure its effectiveness. In this article, we’ll explore these methods and provide you with easy steps to follow.


So, you’ve finally pulled out your lawn mower after a long winter, only to find out that the gas sitting in the tank is old and unusable. Frustrating, right? But don’t worry, we’ve got you covered!

Getting rid of old gas in your lawn mower is a crucial step to ensure a smooth and efficient mowing experience. But how do you dispose of it properly without harming the environment? Well, you have a couple of options that won’t break the bank or require extensive technical knowledge.

In this article, we’ll walk you through two simple methods: siphoning the old gas out manually or using a fuel stabilizer. Whichever route you choose, we’ve got you covered with step-by-step instructions. So, let’s get started and rescue your lawn mower from that old, ineffective gas!

How to Remove Old Gas in Lawn Mower: Effective Solutions

How to Get Rid of Old Gas in Lawn Mower


In order to keep your lawn mower running smoothly, it’s important to properly maintain it. One common issue that arises is dealing with old gas. If you’ve left gas sitting in your lawn mower over the winter or for an extended period of time, it can cause problems with the engine. In this article, we will discuss the best methods to get rid of old gas in your lawn mower, ensuring that it runs efficiently and effectively.

Why is it Important to Remove Old Gas?

Old gas can deteriorate over time, leading to the formation of sediment and varnish. This can clog the fuel system and cause engine performance issues. Using old gas can also lead to difficulty starting the engine, poor fuel efficiency, and even damage to the mower’s internal components. Therefore, it’s essential to remove old gas from your lawn mower before you use it.

Read also  How To Lower Lawn Mower Blade: A Step-By-Step Guide

Signs of Old Gas

Before we dive into the methods of removing old gas, let’s look at some common signs that indicate your mower’s gas is past its prime:

  1. The gasoline has a foul odor.
  2. The color of the gas appears darker than fresh gasoline.
  3. The engine struggles to start or stalls frequently.
  4. The mower runs unevenly or experiences a lack of power.

If you notice any of these signs, it’s a good indication that you need to remove the old gas from your lawn mower.

Method 1: Draining the Old Gas

The most common and straightforward method of removing old gas from a lawn mower is to drain it completely. Follow these steps:

  1. Locate the fuel cap on your mower and remove it.
  2. Place a container underneath the fuel tank to catch the old gas as it drains.
  3. Depending on your mower’s model, you may need to use a hose or unscrew a plug to release the gas. Consult your owner’s manual for specific instructions.
  4. Tilt the mower slightly to allow all the old gas to flow out.
  5. Once all the gas has drained, dispose of it properly according to your local regulations. Do not pour it down the drain or onto the ground.

Method 2: Diluting the Old Gas

If draining the old gas completely is not feasible or you don’t have access to appropriate disposal methods, you can dilute the old gas with fresh gasoline. This method works best when the old gas is not severely degraded. Here’s how to do it:

  1. Fill a gas can with fresh gasoline.
  2. Add the fresh gasoline to your lawn mower’s fuel tank, mixing it with the old gas.
  3. Start the mower and let it run for a few minutes to allow the fresh fuel to mix with the old gas.
  4. If the mower still exhibits signs of running poorly, repeat the process with a higher concentration of fresh gasoline.
Read also  How To Fix A Water Damaged Lawn Mower?

Method 3: Using Fuel Stabilizer

Another option to prevent gas from going bad in your lawn mower is to use a fuel stabilizer. This method is best utilized when you know you won’t be using the mower for an extended period of time, such as during the winter. Here’s how to do it:

  1. Purchase a fuel stabilizer from your local hardware store or automotive shop.
  2. Fill your lawn mower’s fuel tank with fresh gasoline.
  3. Follow the instructions on the fuel stabilizer bottle to add the appropriate amount to your mower’s fuel tank.
  4. Start the mower and let it run for a few minutes to allow the stabilizer to mix with the gasoline.
  5. The fuel stabilizer will help prevent the gas from deteriorating, ensuring that it remains fresh for a longer period of time.

By following these methods, you can effectively get rid of old gas in your lawn mower. Whether you choose to drain the old gas, dilute it with fresh gasoline, or use a fuel stabilizer, the key is to ensure that your mower’s engine is running smoothly. Regular maintenance and proper fuel management will prolong the life of your lawn mower and keep your lawn looking its best.

Remember, if you’re unsure about any of these methods or encounter difficulties, it’s always a good idea to consult your mower’s owner’s manual or seek assistance from a professional. With proper care, your lawn mower will continue to serve you well for years to come.

Lawn Mower Repair – How To Drain Bad or Old Gas and Clean Carburetor Bowl and Jet

Frequently Asked Questions

How do I get rid of old gas in my lawn mower?

To properly dispose of old gas in your lawn mower, follow these steps:

Read also  How To Start A Riding Lawn Mower Without A Key?

Can I use old gas in my lawn mower?

Using old gas in your lawn mower can cause clogs and damage to the engine. It is best to dispose of old gas and use fresh fuel for optimal performance.

What should I do with the old gas from my lawn mower?

You should never pour old gas down the drain, onto the ground, or into storm drains. Instead, take it to a local recycling center or hazardous waste disposal facility for proper disposal.

How often should I replace the gas in my lawn mower?

To ensure your lawn mower runs smoothly, it is recommended to replace the gas every 30 days. This helps prevent the accumulation of stale fuel that can negatively affect performance.

Can I mix old gas with fresh gas in my lawn mower?

Mixing old gas with fresh gas can lead to poor engine performance. It is best to avoid this practice and only use fresh fuel to maintain the efficiency of your lawn mower.

What are the signs that my lawn mower has old gas?

Some signs that your lawn mower has old gas include difficulty starting, poor engine performance, and unusual sounds or smoke coming from the exhaust. If you notice any of these signs, it’s time to address the issue.

Final Thoughts

To get rid of old gas in a lawn mower, start by draining the existing fuel from the tank. Next, remove the spark plug and pour a small amount of fresh gas into the spark plug hole. After reinstalling the spark plug, fill the tank with fresh gasoline. If the mower still fails to start, consider replacing the fuel filter and cleaning the carburetor. Regularly emptying the fuel tank and using fresh gas can help prevent this issue in the future. Now you know how to get rid of old gas in a lawn mower.