How to clean lawn mower carburetor

To be honest, there are only a few pieces of home maintenance equipment that serve us as well as a lawn mower in terms of reliability. Unfortunately, despite their difficult existence, lawnmowers receive far less attention than they deserve.

Lawn mower carburetors aren’t hard to unfix and clean.

This is evident when it comes to a mower’s carburetor, which is vital to its operation. The carburetor of a lawnmower determines its lifespan.
A dirty carburetor, along with a dirty spark plug, old fuel, and dirty air filters, is one of the main reasons why a lawn mower may not start. So, cleaning a lawn mower carburetor is a must.
Sadly, many mowers avoid dismantling the carburetor and instead take it to a shop. Regardless of the fact that a dirty carburetor is something that can be easily fixed, you should pay for this service.
You can learn how to clean lawn mower carburetor if you are a DIY enthusiast or just a regular mower who wants to save money. It’s also a vital maintenance procedure.

How Often To Clean Lawn Mower Carb

This varies, as one would expect. When compared to a non-regular user, a regular user will undoubtedly have the lawnmower’s carburetor covered with grass clippings much more quickly. The reasoning behind this is straightforward: over time, the grass, debris, and twigs make their way into the carburetor and clog the fuel and air passages, causing the engine to stall. Needless to say, this reduces the efficiency of the mower’s engine.
Lawn mower carburetor maintenance should be performed on an annual basis in order to extend the machine’s life and improve its fuel efficiency.
Cleaning your lawn mower carburetor more than once a year is recommended for those who use their mower frequently. Learn everything you need to know about cleaning the carburetor of a lawn mower here.

Detailed Guide on How to Clean Lawn Mower Carburetor

If this is your first time cleaning the carburetor and you are unsure how to reassemble it, you can take a video/photo at each stage. This will help you reassemble it correctly.

1.Safety First

They believe that’safety is preferable to first aid.’ As a result, it is critical that every time you perform any type of repair or maintenance work, you keep safety as your primary concern. When dismantling a carburetor, for example, the old oil can be extremely toxic; therefore, make sure you’re working in a well-ventilated environment. If you’re working in your garage at home, make sure that all of the windows and doors are opened. If you have a garage fan, you can also use it to cool your home. If your shed does not have any ventilation, you should consider finding a different place to work.

2. Remove the Outer Casing and Air Filter

The procedure for doing so varies depending on the type of lawn mower you have. To disassemble the mower, it is best if only a few screws are undone and the covering panel is removed, revealing the mower’s inner workings. The carburetor will be visible after you have removed the air filters. Verify that your air filters are clean and free of debris by inspecting them. Having dirt on the inside of the air filter can cause black smoke to escape from the exhaust, making it difficult for the carburetors to get the air they require to function properly.

3. Removing the Carburetor

The carburetor is normally secured in place with a bolt, but it can be easily removed. Unbolt it with a nut driver, and then drain the fuel line while holding it against the engine with your hands. Disconnect the throttle cables and prepare a rag or other piece of cloth to wipe any fuel that may have spilled on the carburetor or the fuel line while the throttle cables are disconnected.
Disconnect the carburetor from the engine and thoroughly inspect all of the connections that run to and from the carburetor’s choke plates and throttle, as well as the throttle itself. If you discover that the carburetor has been corroded, it is no longer functional and must be replaced. If this is not the case, proceed as described below.

4. Unbolt the carburetor’s bowl and clean the nut

Clean the area around the carburetor with a carburetor cleaner. To remove the bowl, unscrew the nut on the bottom of the bowl. This nut is typically made with a jetted hole. Make a small hole in the hole with a paper clip to ensure that there is no dirt inside.
The presence of simple debris inside this hole will quickly cause the carburetor to stop functioning properly; cleaning it may be sufficient to resolve the issue.

5. Replace the needle

The float is attached to the carburetor by a pin that you’ll see after removing the bowl. To replace the needle, remove the small gasket inside the carburetor and remove it.
Consider getting a new one and making sure it’s installed correctly the first time to avoid problems in the future.

6. Use a carburetor cleaner to get rid of dirt deposits within the carburetor

Dirt trapped within the carburetor can obstruct both the fuel and air passages, impairing the engine’s performance.
The commercial lawnmower carburetor cleaner is packaged in a spray can that can be used to clean both the inside and outside of the carburetor with relative simplicity.
Using the carburetor cleaner, clean all of the parts of the carburetor after they have been removed from the vehicle.
Remove any dirt that has accumulated inside the carburetor’s holes with a paperclip. Make certain that they are free of any debris.

7. Replace the gasket

When you have finished disassembling the carburetor, we recommend that you replace the main gasket.
A carburetor bowl is a piece of equipment that is typically located between the bowl and the carburetor. Furthermore, these gaskets are relatively inexpensive. Simply replace the old one with a new one and install it in its place.

8. Check its settings

After cleaning, check the carburetor settings to see if anything needs to be updated or adjusted.
For those who don’t buy it, here’s the truth: carb cleaning is incomplete without it. Because while you were cleaning, you may have loosened some vital wires for your carburetor’s engine. Isn’t that absurd?
Use a flashlight to check if everything is fixed properly. Start the engine once you’re sure it’s all done. It should start smoothly and not shake after cleaning the carburetor.

9. Reassemble and reattach

If you had taken any photographs during the process, you can use them to guide you through the process of reinstalling the carburetor and reconnecting it to the engine. After that, fill the tank with fuel and start the engine. If your lawn mower was having trouble starting up because of dirt, it should now start up very easily without any difficulty.


As you can see, cleaning a lawn mower carburetor is simple and can save you money, even if you aren’t familiar with working with machines and engines in the first place. After learning how to clean a lawn mower carburetor, you can rest assured that your lawnmower will remain in good condition and will serve you for many years to come, no matter how frequently you use it. Wishing you the best of luck with your upcoming carb cleaning project.

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