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Changing Gas on a Cub Cadet Walk-Behind Mower

Learn how to safely drain old gas from the lawn mower with the experts at Cub Cadet.

If your walk-behind mower has been sitting in the garage for a while, chances are you will need to drain the gas from the lawn mower. Whether the old gas in the lawn mower has been contaminated or you've just put in the wrong type of gas, there is an easy and safe way to drain the old fuel.

This video will show you how to change the gas on a Cub Cadet walk-behind mower. Please note, the instructions in this video may vary slightly depending on your model. Before your begin to drain gas from the lawn mower, check your operator's manual for detailed instructions. 

You will need a few supplies to drain the gas from the lawn mower, including an oil siphon pump (an affordable staple for safe, walk-behind mower maintenance) and also a container for catching and storing the drained gas. Once you've gathered these supplies, you are ready to empty the old gas from the lawn mower.

Length of clip: 01:00


Step 1: To ensure safety, remove the spark plug ignition wire from your walk-behind mower.


Step 2: Unscrew the gas cap.

Step 3: If you are using the oil siphon pump, notice the different color tubes of the siphon pump. Place the orange tube into the gas tank of your walk-behind mower and the black tube into a proper disposal container.


Step 4: Prime the pump by pumping the handle three or four times. Once the liquid begins to flow, it will continue flowing without further pumping.

Step 5: Remove the oil siphon pump. Add new gas to the walk-behind mower. Make sure you also add a fuel stabilizer like Sta-Bil to extend the life of your fuel and prevent further buildup. Once this is done, you can replace the gas cap and reconnect the spark plug ignition wire. Take care to dispose of the gas properly.


Once you've completed these simple steps to replace bad gas in the lawn mower, you are ready to conquer your lawn with your Cub Cadet walk-behind mower. Get help from the experts at Cub Cadet for lawn management and equipment maintenance that is safe and easy.

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