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How to Clean the Carburetor on a John Deere Riding Lawnmower

Is your John Deere riding lawnmower not starting or running rough? A dirty carburetor could be to blame. We’re here to guide you through cleaning and help you get your lawnmower back in shape.

How do you clean the carburetor on a John Deere riding lawnmower:

Check the air filter and fuel valve. Clean debris and ensure fuel flow. Use carb cleaner to dissolve deposits. Reassemble the carburetor with new seals. If the issue persists, replace the carburetor or consult a professional. Regular maintenance, like replacing air/fuel filters, helps prevent car issues.

Are you having trouble with your lawnmower’s performance? A thorough carburetor cleaning could be the solution. Learn how to do it yourself and enhance your machine’s efficiency. Keep reading for a detailed guide!


Steps to clean a John Deeree riding lawnmower

It is not difficult to clean and repair a lawnmower’s carburetor. These steps will help you get a clean carburetor and keep your John Deere lawnmower working.

Step 1. Signs of a Dirty John Deere Carburetor

If your John Deere lawnmower is challenging to start, it can indicate that your carburetor might be dirty. Besides creating issues, another indicator is black smoke and increased fuel consumption. Dirt in the air that is not removed with the air filters makes the carburetor dirty.

Oil deposits and rust also make the carburetor dirty. Dirty carburetors are a threat to engineering. They damage the engine and reduce its efficiency as well.

Step 2. Check the Air Filter

When the lawnmower is cooled down, the first step is to check the mower’s outside and ensure that it’s free of debris. Park the John Deere lawnmower at a place with a hard floor that can be cleaned if you spill some gas. Before starting to work on the engine, remove the spark plug cable.

This ensures that the engine can not unintendedly start running. Remove the air filter from the engine and check it. Suppose the air filter is dirty or even clogged. Clean it, or it will produce black smoke, increasing fuel consumption.

In my 20 years of experience, I’ve found that a John Deere riding lawnmower’s carburetor often needs cleaning when the machine starts running rough, loses power, or fails to start. It might also consume more fuel than usual or emit black smoke from the exhaust. These are clear signs that the carburetor is clogged and needs a thorough cleaning.

Step 3. Check the Fuel Valve

Before working on the carburetor, we must ensure no gas can be spilled. This means we have to close the fuel valve. If your John Deere Siting Lawnmower does not have one or does not work, you have to empty the gas tank.

If no fuel can leak, you can start to detach the carburetor’s fuel line. Some of the fuel may spill in this case, so be prepared for it. The fuel valve is also the periphery from where all fuel flows to the chamber through the pipelines.

Check that they are not clogged by small debris and continuous use over time. You can clean them first with water and then with a gentle fuel bath.

Step 4. Remove the rust

If you find any rust at any part of your John Deere carburetor, try to remove it. You can use a rust remover or some sandpaper to obliterate it. Remove the screws and release the bulb and base. Make some pictures or a short video so you know how they are all connected.

They remove gaskets and diaphragms. Clean every part thoroughly with a carburetor cleaner. Wash them with some gas, and let them dry. Carefully reassemble the parts back as you open them.

Step 5. Use Carburetor Cleaner

Carburetor cleaner is used to clean the deposits within the carburetor. It is just like a spray, which you can find in many locations. You can spray it directly at the carburetor to clean it. 

After cleaning the surface with the cleaner, it is also an excellent moment to do other maintenance. Check the engine oil if it is dirty. Check the oil filter,r if present, and check the sparkplugs. Replace or repair the air filters and change the oil if it is dirty.

Step 6. If carburetor damage is found, use a repair kit

If you find more extensive problems with your John Deere carburetor, and just cleaning is not enough, we must go deeper. For this, you need to get a carburetor repair kit. It contains different components of the carburetor.

You may consider replacing the float, the float needle, diaphragms, and gaskets. This will help in improving the performance of your carburetor. If your carburetor still performs poorly after this step, you need to replace your carburetor with a new one.

As dirt entering the carburetor is a likely cause, replace the air and fuel filter annually and keep your carburetor well-adjusted and maintained to avoid further issues.

Step 7. Reassemble the carburetor

After you have thoroughly cleaned all lawnmower parts, it is time to reassemble them. If you do this for the first time, this is where the images or video you made earlier can be a great help.

Using new washers and seals when reassembling the carburetor is preferable, even if the present seals are okay. They are cheap, and they help prevent any leakages for much longer. Make sure that you place the suitable screws and nuts in the right places.

When cleaning the carburetor, it’s important to take certain precautions. I always wear safety gloves and goggles and work in a well-ventilated area away from open flames. Over the years, I’ve learned that being careful not to damage any parts during disassembly and cleaning is key to a successful cleaning process.

Step 8. If it still does not work well, Ask a professional for help

If you have finished cleaning your carburetor, using the repair kit, and even replacing it, your John Deere Lawnmower still does not function properly. It is time to ask a professional for help.

Frequently Asked Questions:

1. What makes a carburetor to stop working correctly?

A carburetor is one of the significant parts of a lawnmower. If it is not working correctly, your mower will also not work correctly. There can be different causes why your carburetor is not working correctly.

The most common reason is gas blockage if you keep them idle for a long time. Other causes are dirt in the air not filtered by the air filter, dirty gas, and oil deposits.

2. Can we clean a mower’s carburetor without removing it?

Yes, the carburetor can also be cleaned without removing it. In this case, you need to have an aerosol carburetor cleaner spray. Make sure that the lawnmower is cooled down. Ensure you park the lawnmower in a clean environment, with as little dust as possible.

After that, open the air filter cover, exposing the carburetor. Now, place the tip of the aerosol cleaner spray into the center of the carburetor and spray into it. The engine and carburetor should be running in this process. Finally, remove the deposits and replace the cover and linkage.

3. The carburetor is not working correctly even after cleaning it. What should we do?

Have you done everything correctly and cleaned the carburetor, but it is still not working? Depending on your skill set, you could use a carburetor repair set or replace it with a new one.

Also, check if the carburetor is adjusted correctly. If the problem happens more often, consider replacing the air and fuel filters. Another option would be to call a professional. For them, this is a simple job they do very often.

Over the years, people make many common mistakes when cleaning their carburetor. These include not cleaning all parts thoroughly, damaging parts during disassembly, and not properly reinstalling the carburetor. These mistakes can be avoided by following instructions carefully and working patiently.


In short, we can say that every lawnmower, including a riding mower, needs good maintenance overall to work appropriately for a longer time. This also applies to a John Deere riding mower. If a riding mower is not maintained well, it will stop functioning correctly.

The engine’s efficiency will be reduced, and thus, it will use more gas. The carburetor, or carb, is the lung of the machinery and hence requires attention. A dirty mower carburetor is a common issue everyone has to deal with.

The carburetor keeps your lawn mower running strong, smooth, and functioning well, so blocked or restricted channels may cause your lawnmower to run rough or weak in comparison. So, how do you clean a riding mower carburetor without removing it?

• The Importance of Regular Carb Cleaning

You can easily clean the internal and external components following these steps. First, you’ll need both an air compressor and a carb cleaner. Use the air compressor to blow out any loose debris from the carb. Then, use the carb cleaner to clean the carbs thoroughly.

If you don’t have an air compressor and carb cleaner, you can purchase them at any automotive or home improvement store. In some cases, if the carb is too dirty or damaged, you might need to replace it with replacement carbs or an aftermarket carb.

Be sure to choose the correct carb for your specific riding mower model. Remember, even those carbs need regular cleaning to maintain optimal performance. Finally, always clean your riding mower’s carbs and other components regularly.

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  1. Colleen Fletcher says:

    How often should I clean my lawnmower’s carburetor?

    • Allard Vdhooft says:

      Regularly clean your lawnmower’s carburetor to maintain engine performance. It’s a simple process that can be done preventatively or as needed. Keep your John Deere mower running smoothly with these steps.

  2. Jo Prescott says:

    These steps are so easy to follow, thank you for the guide!

    • Allard Vdhooft says:

      Thank you for your feedback, Jo! I’m glad you found the steps easy to follow. Regular maintenance of your John Deere lawnmower is essential for optimal performance.

  3. Wanda Boyd says:

    Great guide, very helpful!

    • Allard Vdhooft says:

      Thank you, Wanda! I’m glad you found the guide helpful. Proper maintenance is crucial for keeping your John Deere lawnmower running smoothly. Happy mowing!

  4. Glen Dixon says:

    I never thought about checking the air filter before, thanks!

    • Allard Vdhooft says:

      Glad to help, Glen! Regular maintenance is key to keeping your John Deere lawnmower running smoothly. Feel free to reach out if you have any more questions.

  5. Dustin Knight says:

    I didn’t know cleaning the carburetor was so important.

    • Allard Vdhooft says:

      Maintaining your carburetor is crucial for your lawnmower’s performance. Follow these steps for an efficient and long-lasting John Deere riding lawnmower.

  6. Gene Harvey says:

    Can I clean the carburetor myself if I’m not very experienced with machines?

    • Allard Vdhooft says:

      Yes, you can clean the carburetor yourself by following the step-by-step guide provided in the blog post. It is a simple maintenance task that will help your lawnmower run well.

  7. Samuel May says:

    Will definitely try this on my lawnmower.

    • Allard Vdhooft says:

      Thank you, Samuel! Cleaning your lawnmower’s carburetor is essential for maintaining its performance. Let me know if you have any questions or need further assistance. Enjoy your well-functioning lawnmower!

  8. Ida Lowe says:

    Can I use any carburetor cleaner, or is there a specific type?

    • Allard Vdhooft says:

      You can use any carburetor cleaner for your John Deere riding lawnmower. Follow the steps in the post to effectively clean your carburetor and keep your lawnmower running smoothly.

  9. Edward Martin says:

    Will cleaning the carburetor improve the lawnmower’s performance?

    • Allard Vdhooft says:

      Yes, cleaning the carburetor on your lawnmower will improve performance. Follow these steps for easy maintenance. Happy mowing!

  10. Patrick Byrd says:

    Very clear explanations, thank you!

    • Allard Vdhooft says:

      Thank you for the positive feedback, Patrick! I’m glad you found the explanations clear. Feel free to reach out if you have any more questions about maintaining your John Deere riding lawnmower.

  11. Chloe Johnston says:

    Important maintenance tips, thanks for sharing.

    • Allard Vdhooft says:

      Thank you for your kind words, Chloe. I’m glad you found the maintenance tips helpful. Feel free to reach out if you have any more questions about caring for your John Deere lawnmower!

  12. Julia Foster says:

    Is it better to clean the carburetor regularly or only when there’s a problem?

    • Allard Vdhooft says:

      Regularly cleaning the carburetor on your John Deere riding lawnmower can prevent future problems and ensure peak performance. Follow the steps outlined to keep your machine running smoothly for years to come!

  13. Cody Berry says:

    This is so detailed, I feel confident to clean my carburetor now.

    • Allard Vdhooft says:

      Thank you for the positive feedback, Cody! I’m glad the detailed guide was helpful. Happy to hear you feel confident to clean your carburetor now. Good luck with the maintenance of your John Deere lawnmower!

  14. Raymond Rhodes says:

    I appreciate the emphasis on maintenance, it’s so important for machines like this.

    • Allard Vdhooft says:

      Thank you, Raymond! Maintenance is key to keeping machines like this running smoothly. I’m glad you found the information helpful. Happy mowing!

  15. Kitty Wheeler says:

    Is it necessary to clean the carburetor even if the lawnmower is new?

    • Allard Vdhooft says:

      Thank you for your question, Kitty. It’s always a good idea to clean the carburetor, even on a new lawnmower, to ensure it runs smoothly and efficiently for years to come.

  16. Juan Warren says:

    Very informative, thank you!

    • Allard Vdhooft says:

      Thank you, Juan! I’m glad you found the information helpful. Let me know if you have any other questions or need further assistance with maintaining your John Deere riding lawnmower.

  17. Erik Cox says:

    What kind of damage can a dirty carburetor cause to the engine?

    • Allard Vdhooft says:

      Regularly cleaning your carburetor is essential for maintaining engine power and efficiency in your John Deere lawnmower. Follow these steps for preventive maintenance to ensure your mower works well for years to come.

  18. Vernon Carter says:

    Good to know about the fuel valve check.

    • Allard Vdhooft says:

      Thank you, Vernon! Regular maintenance is key for a well-functioning lawnmower. Remember to check the fuel valve periodically to keep your John Deere in top shape.

  19. Corey White says:

    What can cause the carburetor to get dirty quickly?

    • Allard Vdhooft says:

      To prevent a dirty carburetor, ensure regular maintenance and cleaning. Dirt and debris can clog fuel pipelines, affecting engine power. Follow these steps for a clean carburetor on your John Deere lawnmower.

  20. Miguel George says:

    Is it necessary to clean the carburetor on a John Deere riding lawnmower after each mowing session, or is there a recommended schedule for this maintenance task?

    • Allard Vdhooft says:

      Regular carburetor cleaning is recommended to keep your John Deere riding lawnmower running smoothly. Following these steps can help maintain engine power and efficiency.

  21. Byron Simmons says:

    I appreciate the step-by-step instructions.

    • Allard Vdhooft says:

      Thank you, Byron! I’m glad you found the instructions helpful. Regular maintenance is key to keeping your John Deere running smoothly. Let me know if you have any other questions.