Ultimate Guide: How to Clean Lawn Mower Carburetor

Keeping your gardens and grounds neat and picturesque can be a source of anxiety if your lawn mower is acting up.

Perhaps the spark plug has become dirty or carburetor has corroded or become blocked by the debris from cleaning the lawn and if you don’t know how to fix lawn mowers carburetor then oh! Get ready to shell out money at the repair shop.

However, for you, the days of despair are over as this article is designed to help you fix your lawn mowers carburetor in no time and at no extra cost.

So, read on if you want to learn how to clean lawn mower carburetor.

Why Should You Clean A Lawn Mower Carburetor?

The carburetor’s job is to send air into the fuel in your lawn mower and create internal combustion that provides power to the machine.

Hence, the carburetor should be cleaned frequently not only to keep it debris-free but also to make it fuel-efficient and increase the lifespan of your lawn mower.

Image: Lawn Mower Carburetor Diagram

How to Clean A Carburetor On Lawn Mower:

Let’s Watch a video & see how to do this easily! Before going to deep in article.

There is a variety of lawn mowers available based on the size of the garden, fuel (electric, kinetic, gas), style, etc. Different lawn mowers require different kinds of attention.

The method of cleaning carburetor only applies to gas-powered lawn mowers, not to electric lawn mowers without a cord or lawn mowers that are self-propelled and battery-powered.

Things You Need: 

Here are the things you need before you start cleaning your lawn mower carburetor:

  • Flashlight or a Lamp

Unless you are an expert with internal mechanics of a lawn mower, use a flashlight to closely examine the parts of the carburetor. Or if you want both of your hands to be free, then use a lamp.

  • Rags

In order to clean your hands and for wiping dirt and grime from the carburetor, keep some rags nearby.

  • Screwdriver

In order to take off screws or removing the filter or other parts, you can use a Philip’s screwdriver or even a plastic card to avoid damaging internal parts.

  • Air-Compressor Gun

Before wiping dirt, oil, or grimes manually with a rag, you can use a strong air-compressor gun to blow away some of the dirt.

  • Aerosol Cleaner

Aerosol cleaner’s work and clean best in electric, gas and other running machines. And in these, they don’t cause rust or any discharge from the machine.

  • Goggles

Wear them throughout the cleaning process to protect your eyes from any potential injury.

Did you see cleaning process video in above ? Also, now you know what tools/equipment’s exactly need.

For more intense; Let’s watch another video. Enjoy!

The Cleaning Process: How to Clean Riding Lawn Mower Carburetor?

Now let’s move on to the actual cleaning process of the lawn mowers carburetor. (Step by Step Process.)
  • Step 1: Ensure Safety First

Before cleaning anything of any kind, be sure to be in a well-aired space. Carburetors may have old fuels that can harm you, so you should work in an airy space. Open the door of your garage or turn on the ventilation fan.

Avoid cleaning your lawn mower carburetor nearby open flames as the cleaning agents are not only toxic but also highly inflammable.

  • Step 2: Assess the Problems

Your lawn mower may have problems besides the carburetor, so check to see if there is sufficient fuel, spark plugs and ignition switches are in the right place and position. Also check to see whether the air filter is clean and debris free.

However, if it appears that all of these are alright, then pour some carburetor cleaner in the carburetor and start your lawn mower, if it splutters, then it means your lawn mower has carburetor problems.

  • Step 3: Take Pictures of the Carburetor (Smart Thought)

In order to make sure you can piece it back together exactly as it was, take plenty of pictures so that it can guide you to put back everything together properly.

  • Step 4: Remove the Outer Casing

Use a screwdriver or a wrench to remove the outer casing to reveal the internal mechanics of the lawn mower. Also, remove the air filter and place the bolts and place them in a plastic bag to keep them safe as well as capture any fuel leakage.

  • Step 5: Unscrew the Carburetor

Use a screwdriver to unbolt the carburetor from its hold and also separate it from the fuel line. Use a rag to clean any oil spillage from both the carburetor and the fuel line. If, however, no oil fuel spills from the fuel line, then you need to clean the fuel line properly to free it from blockage.

  • Step 6: Inspect the Air Filter

Make sure that the air filter has nothing that blocks air from flowing to the carburetor. The main reason behind black smoke emission from exhaust pipes is an air filter filled with dirt or debris.

  • Step 7: Spray Carburetor Cleaner

Thoroughly spray carburetor cleaner in all the nooks and crannies of the carburetor. Clean both sides of the carburetor as well.

  • Step 8: Use the Air-Compressor Gun

To clean the plastic pieces inside the carburetor, use an air-compressor gun instead of any cleaner as they might corrode the pieces rather than clean them. Also for places that you cannot reach, use the aircompressor gun to clean it.

  • Step 9: Inspect the Wires

It is very important that you check the wires thoroughly because they can make your lawn mower useless.

Check to see whether they are worn out or displaced somehow.

Lawn Mower Carburetor Adjustment
  • Step 10: Clean the Bowl

Clean the carburetor bowl first with a carburetor cleaner and then wipe it with a soft rag. As carburetor bowls are usually made with aluminum and wiping it with force may distort the shape. 

You will see that the bowl is held in place with a nut which is really a spout (it has a hole), be mindful of cleaning it as well by scarping and cleaning it with carburetor cleaner.

  • Step 11: Don’t Be Afraid to Replace Parts

If the carburetor bowl or the needle that is attached to the carburetor with a pin is too dirty, then instead of cleaning it, simply replace them. The same goes for that gasket in which the needle is placed.

  • Step 12: Reassemble the Parts

Now that you are done with all the dirty work (literally), it’s time for you to reassemble all the parts. Remember the picture that you took; use them as a guide to reattach the parts piece by piece.

  • Step 13: Start and Go

Finally, cleaning is done. Why not fire it up? Even if you don’t immediately start mowing your lawn, you should still fire it up to see whether it is running smoothly.

An Alternative Way- Clean the Lawn Mower Carburetor Without Removing It:

Another way to clean a lawn mower carburetor is to do it without taking the carburetor apart. Yes! You can clean it without taking it completely apart.

For instance, if your lawn mower is relatively new and only has some dirt and grime, you can clean it without removing the carburetor completely. However, if it is quite old, then there is no alternative to removing it and giving it a thorough cleaning.

What to Use to Clean Lawn Mower Carburetor:

Here are the things you need for the cleaning process:

  • Aerosol spray
  • A lawn mower maintenance kit
  • Goggles
  • Some rags
  • Screwdriver
  • A flashlight

Here, we show you how you do it without removing carburetor from a lawn mower inside. Let’s Play!

The Cleaning Process- How to Clean Lawn Mower Carburetor Without Removing It:

Here’s the step-by-step carburetor cleaning process:

  • Step 1

Your first step must be to examine and assess whether the carburetor is the main problem. You can find out by simply applying some aerosol lubricant or cleaner on your lawn mower carburetor. If you see that it starts without any problem, then the problem lies elsewhere, not in the carburetor.

  • Step 2

Reveal the innards of the carburetor by opening the air filter cover by using a screwdriver. The next step is to remove the cover outside the carburetor as well as the other linkages attached to the carburetor.

  • Step 3

Make sure to have the carburetor remain in this state until it dries and then starts the engine of your lawn mower.

  • Step 4

Take the aerosol spray and spray it in the middle of the carburetor and make sure that throughout this step, the engine remains running and pay attention to whether the spray has spread all over the channels of the carburetor.

  • Step 5

Carefully remove the deposits of oil and dirt gathered on the throttle at the bottom of the carburetor. Next, turn off the engine and carefully spray aerosol on the choke shaft situated in the throat of the carburetor.

  • Step 6

If needed, do not hesitate to replace the carburetor if you are not satisfied with its performance. If it does not need to be replaced, carefully inspect everything with a flashlight. Finally, reattach the linkage to the carburetor, screw the covers as well as the air filter in place with the screwdriver.

Briggs and Stratton Carburetor Troubleshooting:

Here is interesting part in lawn mower carburetor adjustment process.

This is not hard! Even you need to be pro with this if you are already did upper task. Means, have skill in riding and maintenance like; changing mower carburetor.

Just keep eye on this video and do what to do. You will learn easily how to do Briggs and Stratton carburetor adjustment with RYAN FENTERS.

Now you have proper Briggs and Stratton carburetor troubleshooting idea and you know how you do it.

For intense, wanna know few about Briggs and Stratton carburetor diagram?

Let’s see! Hope it will give extra boost in understanding.

Final Word:

Safety comes first and foremost, so while the engine is running; do not tou ch the carburetor (with or without gloves) at all. Unless the carburetor is completely cooled down, don’t take it apart.

Hence, it’s brings happy in the  end of your mowing journey.

Our advice is that if the carburetor fails to function properly even after your relentless effort to clean the carburetor following these steps, then it’s time to visit the repair shop.

Hope it doesn’t come to that.

Good luck!

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