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Lawn Mower Carburetor Cleaner, 25 Things You Should Know

Tired of your lawn mower’s poor performance and facing frequent engine trouble? You might need a lawn mower carburetor cleaner to rejuvenate your neglected garden companion. This blog post will guide you through the easy and effective ways to clean your carburetor, ensuring your mower runs like new again.

Lawn mower carburetor cleaner:

Cleaning your lawn mower’s carburetor is crucial for optimal performance and efficiency. Two primary types of carburetor cleaners are liquid and aerosol cleaners. Regularly clean the carburetor, follow the manufacturer’s instructions, and prioritize safety when performing maintenance.

Recommended lawn mower carburetor cleaner brands include Berryman Products, Gumout, and CRC Industries. By properly maintaining the carburetor, you can extend the lifespan of your lawn mower.

Discover the secrets of keeping your lawn mower running smoothly with our guide to carburetor cleaning. From recognizing symptoms to DIY fixes, we’ll help you maintain optimal performance and prolong your mower’s life. Keep reading for practical tips and expert advice.


Lawn Mower Carburetor Cleaning Solution

Keeping your lawn mower in excellent condition is vital for its long-lasting performance and efficiency. One overlooked aspect of lawn mower maintenance is cleaning the carburetor, which plays a major role in the mower’s functionality.

Why Use Lawn Mower Carburetor Cleaner?

The carburetor is a crucial component of any gas-powered lawn mower as it mixes air and fuel in the appropriate ratio to ensure optimal engine performance. Over time, residue from old fuel, dirt, and debris can accumulate in the carburetor, leading to poor performance, rough idling, and even engine stalling.

Using a carburetor cleaner can effectively remove these deposits and maintain the mower’s functionality. Additionally, it can prevent costly repairs and extend the lifespan of your lawn mower.

Types of Carburetor Cleaners

When it comes to lawn mower carburetor cleaners, there are two primary types: liquid cleaners and aerosol cleaners.

– Liquid Carburetor Cleaners

Liquid carburetor cleaners are typically used by submerging the carburetor parts in the cleaning solution. This type of cleaner can effectively remove residue and deposits, although it may require a longer soaking time.

Following the manufacturer’s instructions when using liquid cleaners is crucial to ensure a thorough and safe cleaning process.

– Aerosol Carburetor Cleaners

Aerosol carburetor cleaners come in a spray can format, and they provide a faster and more convenient alternative to liquid cleaners. This type of cleaner can dissolve deposits and residue quickly without needing to disassemble the carburetor.

However, it must be cautiously used as the high-pressure spray can damage sensitive parts.

How to Clean a Lawn Mower Carburetor Using Cleaner

When using a lawn mower carburetor cleaner, there are some essential steps to follow for an effective and safe cleaning process:

  1. Safety First: Before cleaning, ensure the engine is turned off, and the spark plug wire is disconnected to avoid potential accidents.
  2. Remove the Carburetor: Although aerosol cleaners do not always require disassembly, removing the carburetor is recommended for a thorough cleaning. Carefully disconnect fuel lines and linkage, keeping track of all components and their positions for easier reassembly.
  3. Choose the Right Cleaner: Whether using a liquid or aerosol cleaner, ensure it’s specifically designed for carburetor cleaning to avoid potential damage to the components. Read and follow the manufacturer’s instructions for proper usage.
  4. Clean Thoroughly: For liquid cleaners, submerge the carburetor parts in the cleaning solution for the specified duration. For aerosol cleaners, spray the cleaner directly onto the carburetor’s internal and external surfaces, ensuring all areas are adequately covered.
  5. Allow Parts to Dry: After cleaning, ensure all parts are dried completely before reassembling the carburetor. Use compressed air to remove any remaining carburetor cleaner and dry the components.
  6. Reassemble the Carburetor: Carefully reassemble the carburetor and reinstall it onto the lawn mower once all parts are dry. Ensure all connections and linkages are secure before reconnecting the spark plug wire.

Recommended Lawn Mower Carburetor Cleaner Brands

Through years of experience, I have found some carburetor cleaner brands to be more effective and reliable than others. Some recommended brands include:

  • Berryman Products: Known for their B-12 Chemtool Carburetor Cleaner, an effective aerosol cleaner that removes residue quickly and easily.
  • Gumout: Offering both liquid and aerosol carburetor cleaners, Gumout provides a wide range of products to suit various cleaning needs.
  • CRC Industries: CRC Clean-R-Carb is a fast-acting aerosol cleaner that effectively removes deposits and residue, improving your lawn mower’s performance.

Tips for Effective Carburetor Cleaning

  • Regularly cleaning the carburetor can help maintain optimal performance and efficiency. Aim to clean the carburetor at least once per season, alongside other essential maintenance tasks.
  • Always follow the manufacturer’s instructions when using carburetor cleaner to ensure a safe and efficient cleaning process.
  • Wear protective gloves and eyewear when using carburetor cleaners, as they can cause skin and eye irritation.

Additional Resources for Lawn Mower Maintenance

Regularly cleaning your lawn mower carburetor with an effective cleaner can ensure its optimal performance and extend its lifespan. Remember to follow the manufacturer’s instructions and prioritize safety when performing maintenance tasks.

With proper care, your lawn mower will remain a useful and efficient tool for years to come.

Is it Safe to Use Carburetor Cleaner in a Lawn Mower?

Maintaining a lawn mower is essential to ensure its optimal performance and longevity. One common issue that lawn mower owners face is a clogged or dirty carburetor, which can lead to poor running or starting difficulties.

Why Use Carburetor Cleaner on a Lawn Mower?

Carburetor cleaner is a solvent-based formula specifically designed to remove debris, gum, and varnish that can accumulate over time in a carburetor. A dirty carburetor can lead to performance issues, such as difficulty starting the engine, lack of power, or uneven idling.

Using carburetor cleaner on your lawn mower can improve its performance and prevent more costly repairs down the line.

Since fuel evaporates through the carburetor, it leaves behind a residue that can accumulate over time. Furthermore, fuel additives and impurities from gasoline can contribute to the buildup.

As a result, the carburetor’s efficiency may be reduced, causing problems like stalling, rough idling, or even engine failure. Proper carburetor maintenance using carburetor cleaner can help you avoid these undesirable outcomes.

Compatibility of Carburetor Cleaner with Lawn Mowers

Yes, you can safely use carburetor cleaner in a lawn mower. Both 2-stroke and 4-stroke lawn mower engines have carburetors, and carburetor cleaner is designed to work with these types of combustion engines.

However, choosing an appropriate carburetor cleaner for your lawn mower engine is essential.

When choosing a carburetor cleaner, make sure to select one specifically designed for small engines. Many carburetor cleaners available in the market are suitable for automotive engines, lawn mowers, and other small engines.

It is essential to read the product label and instructions to ensure compatibility with your lawn mower engine.

Recommended Brands of Carburetor Cleaner

Based on personal experience, I recommend the following brands of carburetor cleaner for use in lawn mowers:

  1. Gumout
  2. Berryman
  3. CRC
  4. STP
  5. Briggs & Stratton

These brands offer high-quality carburetor cleaner products suitable for small engines like those found in lawn mowers. Make sure to always follow the manufacturer’s instructions on the label for proper use and safety.

Step-by-Step Guide: How to Put Carburetor Cleaner in a Lawn Mower

Here are the steps for using carburetor cleaner in a lawn mower:

– Step 1: Prepare Your Workspace

Select a well-ventilated area to clean your lawn mower’s carburetor. You’ll need a clean surface to lie out all the engine parts, and wearing safety gloves and eye protection is recommended.

– Step 2: Accessing the Carburetor

To access the carburetor, you must first remove the lawn mower’s air filter. Consult your lawn mower’s user manual for instructions on safely removing the air filter.

Once the air filter is removed, you will see the carburetor.

– Step 3: Removing the Carburetor

Disconnect any fuel lines and linkages connected to remove the carburetor. Use a screwdriver or wrench to remove any bolts or screws securing the carburetor to the engine.

Once the carburetor is disconnected, carefully remove it from the engine.

– Step 4: Cleaning the Carburetor Using Carburetor Cleaner

First, disassemble the carburetor by removing any screws or fasteners holding it together. Lay out all the parts on a clean surface. Consult your user manual or a reference like Briggs & Stratton’s carburetor cleaning guide for detailed information on carburetor cleaning.

Using carburetor cleaner, spray all the parts, thoroughly cleaning any small holes and passages. Use a small brush (like a toothbrush) gently scrub any stubborn debris. If necessary, allow the parts to soak for a few minutes, then rinse with water and air dry.

– Step 5: Reassembling the Carburetor

Once all the parts are clean and dry, reassemble the carburetor. Ensure all gaskets, seals, and components are correctly placed and tightened.

– Step 6: Reinstalling the Carburetor

Carefully reinstall the carburetor onto the lawn mower engine, ensuring proper alignment and reconnection of all fuel lines and linkages. Secure the carburetor using the bolts or screws previously removed.

– Step 7: Test the Lawn Mower

Replace the air filter and start your lawn mower. If the cleaning was effective, your lawn mower should start more easily and run more smoothly than before.


In summary, using carburetor cleaner in a lawn mower is safe and essential for ensuring optimal performance and extending the life of your lawn mower. Regular maintenance, including cleaning the carburetor, can prevent more costly repairs down the line.

Remember to follow the manufacturer’s instructions when using carburetor cleaner and refer to your lawn mower’s user manual for guidance on cleaning and maintaining the carburetor properly.

Can you put carburetor cleaner in a lawn mower?
Yes, you can use carburetor cleaner to clean the carburetor of your lawn mower. Make sure to follow the cleaner’s instructions and take necessary safety precautions. However, it is not recommended to add carburetor cleaner directly to your lawn mower’s fuel tank, as it can cause damage to the engine.

What is the Most Effective Method for Cleaning a Lawn Mower Carburetor?

A well-maintained lawn mower is essential for creating a picture-perfect lawn, free from overgrown grass, weeds, and uneven growth. The carburetor is an important component of a lawn mower’s engine that requires regular attention.

Keeping the carburetor clean ensures optimal engine performance, increased fuel efficiency, and extended lifespan.

Identifying When to Clean Your Lawn Mower Carburetor

Before getting into the cleaning process itself, it is important to recognize the signs that indicate your carburetor may need cleaning. These include:

  • Difficulty starting the mower
  • Engine stalling or sputtering while running
  • Unusual smoke emissions from the exhaust
  • Decreased fuel efficiency

If you notice any of these signs, your lawn mower carburetor likely needs a thorough cleaning.

Gather the Necessary Tools and Supplies

To clean your lawn mower carburetor efficiently and effectively, you will need the following supplies:

  • Safety gloves
  • Eye protection
  • Compressed air
  • Carburetor cleaner spray
  • Small brush or toothbrush
  • Wrench or socket set
  • Screwdriver set
  • A clean cloth or rag
  • A container for soaking the carburetor (optional)

Prepare Your Lawn Mower for Carburetor Cleaning

– Step 1: Disconnect the Spark Plug

First and foremost, ensure that the lawn mower’s engine is cool. Remove the spark plug wire to prevent accidental starting of the engine during the cleaning process.

– Step 2: Access the Carburetor

Most lawn mowers have a carburetor that is attached to the air filter housing. Remove the air filter cover and the air filter itself to access the carburetor. Depending on your mower model, this may involve unscrewing, unclipping, or unbolting the components.

– Step 3: Disconnect the Carburetor

Remove any nuts, bolts, or screws that secure the carburetor to the engine or air filter housing using a wrench or socket set.

Carefully disconnect the fuel line and throttle linkage from the carburetor. Note the position of these connections for reassembly. Remove the carburetor from the mower.

Cleaning the Carburetor

– Step 4: External Cleaning

Wearing safety gloves and eye protection, spray the outside of the carburetor with carburetor cleaner. Use a small brush or toothbrush to remove any dirt, debris, or grime that may be present. Wipe the carburetor clean with a cloth or rag.

– Step 5: Disassemble the Carburetor

Disassemble the carburetor by removing the bowl, bowl nut, float, and float hinge pin. If your carburetor has a removable venturi or main fuel jet, remove these components as well.

– Step 6: Internal Cleaning

Submerge the carburetor components in a container filled with carburetor cleaner for thorough cleaning. If you prefer not to soak the parts, use carburetor cleaner spray and a small brush or toothbrush to clean the internal components.

Pay special attention to the small passageways and jets in the carburetor body.

After soaking or manual cleaning, use compressed air to thoroughly dry the parts and ensure all carburetor orifices are clear of cleaner residue and debris.

Take note that carburetor cleaner is a powerful chemical solvent, and I recommend using it in a well-ventilated area, away from open flames or sparks.

Reassemble and Reinstall the Carburetor

– Step 7: Reassemble the Carburetor

Once the carburetor components are clean and dry, reassemble the carburetor by reattaching the float, hinge pin, bowl, and bowl nut (as well as the venturi or main fuel jet, if applicable). Ensure everything is properly seated, and make sure that the float is moving freely.

– Step 8: Reinstall the Carburetor

Reconnect the carburetor to the engine or air filter housing, properly aligning and attaching the fuel line and throttle linkage. Tighten any nuts, bolts, or screws that secure the carburetor in place.

– Step 9: Replace the Air Filter and Spark Plug

Reinstall the air filter and air filter cover, ensuring a proper fit. Reconnect the spark plug wire to the spark plug. If your air filter is old or dirty, consider replacing it to improve engine performance.

Final Thoughts

Regular carburetor cleaning is essential for maintaining your lawn mower’s engine performance and extending its lifespan. Following the steps outlined in this article, you can effectively clean your lawn mower carburetor and keep your mower running smoothly for years.

For more information on carburetor maintenance and cleaning, visit this helpful guide provided by Purdue University’s College of Agriculture.

Turn off the lawn mower engine and ensure it is not hot
Disconnect the spark plug wire to prevent any accidental starts
Locate the carburetor and remove its cover
Remove the air filter to expose the carburetor
Disconnect the fuel line from the carburetor, clamping it off if needed
Unscrew and remove the carburetor from the engine
Disassemble the carburetor, keeping track of all parts and their orientations
Immerse the carburetor parts in carburetor cleaner or use a spray cleaner
Use a brush or compressed air to clean any stubborn debris, then let parts dry
Reassemble the carburetor and reinstall it on the engine
Reattach the fuel line and air filter
Reconnect the spark plug wire and test the engine

Is it Possible to Add Carburetor Cleaner into a Lawn Mower’s Gas Tank?

Importance of Carburetor Maintenance

A well-maintained carburetor is essential for your lawn mower’s efficient and smooth operation. Over time, dirt, grime, and residues can build up within the carburetor, causing it to function less effectively.

As a result, your lawn mower may have difficulty starting, experience stalling, or exhibit poor performance. Therefore, it is crucial to regularly clean and maintain the carburetor to ensure the longevity of your lawn mower and save you from frustration during periods of heavy use.

Using Carburetor Cleaner in the Gas Tank

One of the most common methods for cleaning a carburetor is to use a carburetor cleaner additive. These additives are designed to dissolve and remove deposits, gunk, and grime within the carburetor, restoring its performance.

But the question arises, can you put carburetor cleaner in a lawn mower gas tank? The answer is yes, you can.

Adding a carburetor cleaner to the gas tank is a simple and effective way to clean the carburetor without the need for disassembly. Mixing the product with the fuel flows through the system, dissolving deposits and breaking up blockages.

This can result in improved performance, easier starting, and a smoother-running engine.

– Recommendations

When selecting a carburetor cleaner additive for your lawn mower, look for products specifically designed for small engines, as these are formulated to be compatible with the fuel systems found in lawn mowers and similar equipment.

Avoid using automotive carburetor cleaners, as they may be too aggressive for small engines and cause damage.

Follow the manufacturer’s instructions regarding the proper ratio of cleaner to fuel on the carburetor cleaner bottle. Generally, it is recommended to pour the cleaner directly into the gas tank and then fill it with fresh gasoline.

This ensures proper mixing of the cleaner with the fuel and allows the mixture to be evenly distributed throughout the system.

To maximize the effectiveness of the carburetor cleaner, it’s recommended to run the lawn mower for an extended period. Ideally, plan to mow the entire lawn or run the mower for about 20-30 minutes.

This allows the cleaner to thoroughly circulate through the entire fuel system, breaking up and removing deposits.

– Safety Precautions

While carburetor cleaner additives are safe for use in lawn mower gas tanks, it is essential to follow some safety precautions when handling these products:

  1. Wear gloves and eye protection to minimize skin and eye contact.+
  2. If you’re unsure about the compatibility of a carburetor cleaner with your specific engine, check with the lawn mower manufacturer.
  3. Keep carburetor cleaners away from open flames, as they are highly flammable.
  4. Ensure proper ventilation when using these products, as the vapors can be harmful if inhaled in concentrated amounts.

Alternative Methods for Cleaning the Carburetor

While using a carburetor cleaner additive can be an effective method for cleaning the carburetor in your lawn mower, some situations may require a more thorough approach.

If you suspect severe deposits or blockages within the carburetor, it might be necessary to remove the carburetor for manual cleaning.

You can find numerous tutorials and guides online for removing and cleaning lawn mower carburetors. One such resource is the Pennsylvania State University’s College of Agricultural Sciences guide on small gasoline engine maintenance, which provides detailed instructions and helpful tips for various engine-related tasks, including carburetor cleaning.

Before undertaking manual carburetor cleaning, it is important to have the necessary tools and knowledge to do so safely and effectively. If you are not comfortable performing this task, consider seeking assistance from a qualified professional.


In conclusion, you can put carburetor cleaner in a lawn mower gas tank to help clean and maintain your mower’s carburetor. This method is effective and straightforward, requiring minimal effort and expertise.

However, more severe carburetor issues may require manual cleaning or professional assistance. Regular carburetor maintenance can significantly extend the life of your lawn mower and ensure optimal performance throughout the mowing season.

Can you put carburetor cleaner in a lawn mower gas tank?
Yes, you can add a small amount of carburetor cleaner to the lawn mower’s gas tank to help clean the carburetor and improve its performance. However, be sure to follow the instructions on the cleaner’s packaging for the proper mix ratio and usage guidelines.

Is there a method for effectively cleaning a carburetor without removing it?

A carburetor is an essential component of an internal combustion engine, responsible for mixing the right amount of fuel and air needed for the engine to work properly.

Over time, dirt, debris, and other contaminants can accumulate in the carburetor, causing various engine problems such as decreased performance, rough idling, and hard starting.

Sometimes, you may need to remove and dismantle the carburetor to clean it thoroughly. However, there are instances where you can effectively clean a carburetor without removing it.

Step 1: Gather the Necessary Tools and Supplies

Before you begin, gather the essential tools and cleaning supplies to clean the carburetor without removing it. Some of the items needed include:

  • Carburetor cleaner (preferably in a spray can)
  • A clean cloth or rag
  • A toothbrush or small brush
  • Protective gloves and safety goggles
  • A container to catch any excess cleaner

Step 2: Locate the Carburetor and Access the Throttle Plate

First, locate the carburetor in your engine. It can usually be found on the top of the engine and is connected to the air filter housing. In some cases, you may need to remove the air filter housing to access the carburetor’s throat and the throttle plate.

With the carburetor’s throat exposed, you’ll notice a butterfly valve called the throttle plate. This valve regulates the air that enters the engine, which is a crucial part of the cleaning process.

Step 3: Spray Carburetor Cleaner into the Throttle Plate

Put on your safety goggles and gloves to protect yourself from the harmful chemicals found in carburetor cleaners. Shake the can of carburetor cleaner thoroughly and spray a generous amount of cleaner directly into the throttle plate.

While spraying the throttle plate, observe the choke plate (another butterfly valve located above the throttle plate). Ensure the choke plate is fully open to prevent any cleaner from being sucked into the engine before cleaning.

Step 4: Manually Manipulate the Throttle Plate

After spraying the carburetor cleaner onto the throttle plate, you need to manipulate the throttle plate manually to ensure the cleaner reaches all the crevices and passages within the carburetor.

To do this, locate the throttle linkage (the mechanism connected to the accelerator pedal) and gently move it back and forth. This movement will open and close the throttle plate, allowing the cleaner to penetrate and dissolve any dirt, debris, and varnish accumulated within the carburetor.

Step 5: Clean the Exterior of the Carburetor

Use a toothbrush or a small brush to scrub the exterior of the carburetor gently. While doing this, make sure not to leave any bristles behind. This step helps remove any buildup on the outside of the carburetor.

After scrubbing the exterior, use a clean cloth or rag to wipe down the carburetor, removing any residue from the cleaner and any loosened dirt and debris.

Step 6: Let the Cleaner Sit and Repeat

It’s essential to give the carburetor cleaner some time to work effectively. Allow the cleaner to sit for 15-20 minutes before repeating steps 2-5 for a more thorough cleaning. This process may need to be done several times, depending on the level of buildup inside your carburetor.

Step 7: Reassemble the Air Filter Housing

Once you have finished cleaning the carburetor, reattach the air filter housing and any other parts you may have removed to access the carburetor.

With everything reassembled, let your engine idle for a few minutes to ensure the cleaner has been fully evacuated from the carburetor.

Additional Tips and Precautions

It’s important to remember that cleaning a carburetor without removing it is not always possible, particularly when the accumulated buildup is too severe or if there are issues with the carburetor’s internal components.

In these cases, you may need to consult a professional mechanic or follow a comprehensive guide on removing and cleaning the carburetor by disassembling it.

Finally, to prolong the life and performance of your carburetor, it is essential to maintain your engine regularly. This maintenance includes using quality fuel, changing the oil and air filter routinely, and conducting periodic inspections of the engine components.

By doing so, you can prevent further buildup within the carburetor and optimize the performance of your engine.