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Clean Your Troy Bilt Carburetor: A Lawnmower Owner’s Guide

Are you struggling with a sluggish lawnmower? The culprit could be a dirty carburetor. Our detailed guide will walk you through cleaning and restoring your machine’s efficiency.

Disconnect the battery and remove the engine housing to clean a Troy Bilt mower carb. Detach fuel lines, air intake, and carb mounts to remove them. Reassemble the carb after cleaning. Reinstall the housing and reconnect the battery before testing the engine.

(CC BY-SA 2.0) by math-rock

Is your lawnmower not performing as it should? A dirty carburetor could be the culprit. Our detailed guide will show you how to clean it and get your machine back in top shape. Keep reading to find out how.


Step-by-Step Method How to Clean a Troy Bilt Lawnmower Carburetor:

We outlined the entire procedure by breaking it into a few small, easy-to-do steps mentioned below:

● Step 1. Check the engine before servicing:

Depending on their application, carburetors may need to be serviced after a certain period. The engine’s signs and symptoms, such as odd noise during service, rough running, not starting, and stalling, signify the need for a carburetor cleanup.

Suppose you experience some of the above symptoms. In that case, you should consider examining your carburetor for any deposits that might not supply the correct fuel mixture to the engine.

In my 20 years of experience, I’ve found that difficulty starting the lawnmower, irregular idling, and poor performance are clear signs that your Troy Bilt carburetor needs cleaning. It’s a common issue that can be easily addressed with regular maintenance

● Step 2.   Remove the carburetor from the mower:

In Troy Bilt, riding mowers that take off the carburetor are less accessible than a walk-behind mower. For the disassembly, the following steps have been mentioned:

– Step 1. Detach the cables of the battery:

Remove the key if it is in the ignition switch. Before removing the carburetor, you must ensure the battery is not attached, which could cause the Troy Bilt mower to start. To do this, you can raise the mower seat under which the battery is placed and disconnect one of its terminals.

-Step 2. Remove the housing of the engine blower:

You need to remove the mower hood to reach the carburetor. The following sections shall be under the hood, which must be released.

  • Air duct: Just under the hood, the air duct directs the air to the air filter. Remove the air duct screws and remove the duct from the mower.
  • Air filter assembly: The whole air filter assembly that consists of the air filter cover, the air filter housing, and the filter needs to be removed. First, take off the air filter cover, then the air filter, and finally, the air filter housing by loosening the screws.
  • Blower housing: Blower housing is another component that needs to be removed. You should loosen the screws on the front and back of it to make sure it stays off.

-Step 3. Detach the lines of air and fuel:

The carburetor can be visible once the housing components have been removed. Before you start, taking pictures of the assembly with your cell phone would be helpful. This step allows you to know their locations when you put them back together.

It might help if you used a rag to catch oil spills that could fall from the fuel lines. Remove the fasteners that fix the fuel lines on the carburetor and disconnect the lines. Next, remove the mounting screws from the air intake.

-Step 4. Remove the carburetor:

With the help of its mounting studs, the carburetor is fixed. Loosen the studs with the appropriate wrench. Disconnecting the throttle rods and the throttle spring with the choke rod might be helpful. The carburetor is wholly removed from the mower engine now.

● Step 3. Clean the carburetor:

The carburetor removed is now to be serviced. You should follow the steps mentioned:

– Step 1. Carry out external cleaning:

Externally, you could see the carburetor jets along with the throttle shaft. Use a carburetor cleaner spray on the throttle shaft and the visible jets from the outside to clean them.

Make sure the black residues are removed and the shaft rotates freely. Clear any deposits you see on the outside by spraying the cleaner continuously.

-Step 2. Clean the main jet:

Remove the bowl nut under the carburetor. The nut is the main jet supporting the bowl, which extracts fuel and has the most significant risk of congestion. Clear these deposits using a thin metal wire and ensure the jet is debris-free. Also, spray the jet with a little carb cleaner.

When you see the mist of the cleaner coming out of the other end, you know it’s unblocked. The bowl is usually dirty with debris, rust, and deposits. Spray the cleaner on the bowl as well.

– Step 3. Clean the needle and the float:

After the bowl has been removed, the needle and float are visible. The float regulates the volume of fuel with the help of the needle.

Spray the cleaner onto the float pin that may be sticky with the clogs and the needle. Make sure it is clean, and the deposits have been dislodged.

After cleaning, reassemble the carburetor components, such as the float, needle, bowl, and bowl nut.

● Step 4. Reassemble the components:

After washing, attach the carburetor to the engine: link the fuel lines, air intake, and throttle springs and bars. Then, attach everything back to the mower, such as the air filter assembly, the engine blower assembly, and the hood. Connect the battery wires and start the engine to notice the performance. Your Troy Bilt lawnmower should now be ready to start.

Related Questions:

1. Where is the carburetor located on a Troy Bilt lawnmower?

The carburetor is mounted below the hood under the engine blower assembly on a riding lawnmower. You need to remove the hood first.

You must remove the air filter assembly and the engine blower cover to reach the engine. The carburetor is attached to the front of the engine. It is mounted on the engine with the help of its studs and has the fuel lines and the air intake attached to it.

From my two decades in the field, I recommend cleaning the carburetor at least once every mowing season. If you’re using your lawnmower heavily, you might need to clean it more frequently.

2. How do you clean a lawnmower carburetor without removing it?

You may not want to remove the carburetor from the engine body entirely. You need to disconnect fuel lines and other mechanical components, such as springs, which could be challenging to assemble. Nevertheless, it’s possible to service the carburetor without taking it off entirely.

The simplest way of cleaning it is to use an aerosol spray or a carburetor cleaner and spray it over jets and holes that happen to be dirty. You may also loosen the bowl nut to wash the bowl and the float. A high-quality carburetor cleaner or air compressor will help you clean the carburetor without detaching it completely.

3. Can you clean a lawnmower carburetor with a WD-40?

Wd-40 is a solvent-based cleaner that cleans metal parts with hard deposits and debris. It is safe for use on engine parts, including the carburetor.

The carbon deposits break down without leaving any residue and improve overall results. However, it would be best to be careful about using these aerosol items as they contain hazardous chemicals for breathing.  

4. How do I know if my lawnmower carburetor needs to be cleaned?

If you are experiencing the symptoms below with your engine, it means that your carburetor needs to be inspected:

The engine doesn’t start: even after priming it several times with a tank full of fuel, the engine doesn’t start.

  • Engine Stall: The engine stalls, i.e., stops after starting. This is one of the signs of a bad carburetor.
  • Running lean: When the fuel quantity is lower in the air-fuel mixture, the engine creates a pop-up sound in the intake. This is the poor condition caused by carburetor blockages.
  • Running rich: that’s the opposite of the above. When the carburetor is saturated with fuel, the engine gives black smoke to the exhaust.
  • Flooding: The needle is stuck due to deposits. As a result, a high volume of fuel flows through the carburetor, contributing to flooding.

A common mistake I’ve seen people make when cleaning their Troy Bilt carburetor is not thoroughly drying it after cleaning. Any leftover moisture can cause corrosion, affecting your lawnmower's performance.

Final remarks:

Bad carburetors are a direct result of improper engine maintenance. Servicing the parts at the right time prevents the formation of deposits in the carburetor filters and plugs. Also, the fuel quality of the lawnmower should be inspected. Poor-quality fuel contributes to the formation of residues.

Gas should not be stored in the Troy Bilt lawnmower tank for more than 30 days. With the addition of fresh petrol, the tank should be cleaned periodically. Or, if you intend to store your Troy Bilt mower for a long time, you can also use a fuel stabilizer.

Regular care of Troy Bilt lawnmowers will minimize possible replacements and fixes. If you notice that your lawnmower is not functioning as it should, it may be possible to clean the carburetor instead of replacing it. Here’s how to clean a carburetor on a lawn mower:


Remove the air filter from the lawnmower. This will expose the carburetor cover, the filter cover, and the base of the carburetor. Disconnect the gasoline line from the carburetor. Be careful not to spill any gasoline. Remove the carburetor cover and the cover and linkage.

This will expose the choke and the throttle linkage. Use a carburetor cleaner (for example, Berkebile Oil 2) to clean the inside of the carburetor. The cleaner is number one in effectiveness when removing deposits and residues.

Once you’ve finished cleaning, reassemble the carburetor and reconnect it to the base of the lawnmower. Following these steps, you can maintain your Troy Bilt lawnmower without replacing significant parts. Regular maintenance and cleaning will ensure the longevity of your equipment.

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  1. Jessie James says:

    Super helpful, I’ll try this on my lawnmower.

    • Allard Vdhooft says:

      Glad you found the guide helpful! Good luck with cleaning your lawnmower’s carburetor. Let me know if you have any questions along the way.

  2. Kristin Alexander says:

    Really useful step-by-step instructions.

    • Allard Vdhooft says:

      Thank you, Kristin! I’m glad you found the instructions helpful. Let me know if you have any questions while cleaning your lawnmower carburetor. Happy to help!

  3. Christopher Stevens says:

    I never knew the carburetor could cause so many issues.

    • Allard Vdhooft says:

      Glad you found the information helpful! Cleaning the carburetor can make a big difference in your lawnmower’s performance. Let me know if you have any other questions.

  4. Don Rodriguez says:

    Can this method be applied to other brands of lawnmowers?

    • Allard Vdhooft says:

      Yes, the method outlined in the post can be applied to clean the carburetor of other lawnmower brands as well. Just make sure to follow the steps carefully.

  5. Wade Prescott says:

    Do you need any special tools for this?

    • Allard Vdhooft says:

      No special tools are needed to clean your Troy Bilt lawnmower carburetor. Just follow our step-by-step guide for easy and efficient maintenance. Happy mowing!

  6. Jamie Warren says:

    This is a great DIY solution for lawnmower problems.

    • Allard Vdhooft says:

      Thank you, Jamie! We’re glad you found our DIY solution helpful for lawnmower problems. Let us know if you have any other questions or need further assistance. Happy mowing!

  7. Jacqueline Pierce says:

    I can’t wait to see if this fixes my lawnmower issues.

    • Allard Vdhooft says:

      I hope our guide helps resolve the issue with your lawnmower! Make sure to follow each step carefully for best results. Let us know if you need any further assistance.

  8. Dylan Ray says:

    What are signs that the carburetor needs to be replaced instead of cleaned?

    • Allard Vdhooft says:

      Dirty carburetor signs include rough running, stalling, and odd noises. Try cleaning it before replacing. Follow our guide to restore your lawnmower’s efficiency.

  9. Pat Franklin says:

    I had no idea it was this simple to clean a carburetor.

    • Allard Vdhooft says:

      Glad to hear you found it helpful, Pat! Keeping your carburetor clean is key to a well-running lawnmower. Happy mowing!

  10. Tom Alexander says:

    I’ll definitely be trying this on my lawnmower soon.

    • Allard Vdhooft says:

      Thanks for reading, Tom! Cleaning your lawnmower carb is a great way to keep it running smoothly. We hope you find success with your Troy Bilt mower.

  11. Isaac Martinez says:

    Will cleaning the carburetor improve fuel efficiency?

    • Allard Vdhooft says:

      Yes, cleaning the carburetor can improve fuel efficiency by ensuring the correct fuel mixture. Check out our guide for more details on how to do it.

  12. Joseph Wheeler says:

    I appreciate the videos for visual learners.

    • Allard Vdhooft says:

      Thank you, Joseph! We’re glad the videos are helpful for visual learners. Let us know if you have any other questions or need further assistance with your lawnmower maintenance.

  13. Serenity Lane says:

    How often should the carburetor be cleaned?

    • Allard Vdhooft says:

      For optimal performance, clean your carburetor annually or if experiencing issues. Follow our guide to ensure your machine runs smoothly!

  14. Phillip Vargas says:

    Thank you for the detailed breakdown of each step.

    • Allard Vdhooft says:

      Thank you for your kind words, Phillip! I’m glad you found the breakdown helpful. Let me know if you have any questions or need further assistance.

  15. Salvador Hale says:

    Such a clear and easy-to-follow guide, thank you!

    • Allard Vdhooft says:

      Thank you for the positive feedback, Salvador! I’m glad you found the guide helpful in getting your lawnmower back in shape. Happy mowing!

  16. Chris Lee says:

    Is this something I should do every season?

    • Allard Vdhooft says:

      Yes, cleaning your lawnmower carburetor every season can help maintain its efficiency. Follow our guide for step-by-step instructions on how to do it.

  17. Enrique Lawrence says:

    I didn’t realize carburetor cleaning was so important.

    • Allard Vdhooft says:

      Regularly cleaning your lawnmower’s carburetor is crucial for optimal performance. Thanks for reading!

  18. Stacy Barnett says:

    Is it difficult to remove the carburetor?

    • Allard Vdhooft says:

      Removing the carburetor from a Troy Bilt mower can be a bit tricky. Follow our step-by-step guide for detailed instructions on how to make the process easier.

  19. Seth Miles says:

    Can I do this if I have no experience with engines?

    • Allard Vdhooft says:

      Yes, you can clean a lawnmower carburetor even with no engine experience. Just follow our step-by-step guide for a seamless process. Let us know if you have any questions!

  20. Everett Carpenter says:

    Great guide, very detailed!

    • Allard Vdhooft says:

      Thank you, Everett! We’re glad you found the guide helpful. Let us know if you have any more questions or need further assistance. Happy mowing!