How to Clean a Lawn Mower Carburetor?

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A clogged or corroded carburetor can dramatically affect the performance of your lawn mower engine. If you discover that your engine isn’t working as it should, the first point of call will be to check out the state of the engine carburetor.

The carburetor functions to regulate the flow of air and gasoline to the engine cylinders by creating a highly combustible mixture that regulates engine speed and function.

It is an intricate part of the engine system that must be taken proper care of.

To boost the efficiency and extend its lifespan you must practice regular cleaning and maintenance.

Thoroughly cleaning the carburetor will ensure you have a smooth ride and operation around your garden or lawn. If you are very careful to keep this component clean, you will experience less stalling.

Fortunately, cleaning and adjusting the carburetor is an easy task that can be undertaken in no time. Let’s jump right in.

Read more: How To Change a Lawn Mower Blade?

First and Foremost: Access the situation

Read more: How to Remove a Stuck Lawn Mower Wheel?

Access the fuel lines

You need to be sure the carburetor is indeed the causative part in the engine before you can take calculative steps to resolve the situation.

Using a lubricant dedicated for cleaning the carburetor, pour a short burst within it before attempting to start the engine. If you are able to start up the engine it means the problem is related to fuel rather than the engine itself.

Remove the fuel pipe connecting the carburetor to the engine. Fuel ought to leak out from both ends, if not, it means your fuel line or filter is jammed or clogged. In this case, clean up or replace the filter.

Access the carburetor

Lawn mower carburetors are usually attached to the engine with bolts. Use the proper sized socket wrench to remove these bolts placing it in a disposable bag to capture fuel leaks.

Once you have unscrewed the carburetor, inspect it properly for signs of corrosion or clogging.

Cleaning the Carburetor

1.Check the Air Filter

Inspect the air filter to ensure that there is unobstructed flow of air to the carburetor region.  A clogged air filter will be full of debris and is a common cause of black smoke from the exhaust pipes.

2.Access the connections

Check the connections that fasten the carburetor to the engine to see if they have been fastened in place. Over time, because of regular usage these connectors can loosen up hereby affecting carburetor function.

3. Using the Carburetor Cleaner

Debris inside the carburetor can hinder the smooth flow of air and fuel to the engine. This will entirely reduce the performance of the engine. Fortunately, there are carburetor cleaners or lubricants that can be used to clean out the carburetor without having to remove it from the engine.

The lubricants come in ergonomically designed spray cans and jets that help users clean inside and outside of carburetors without removing it.

For a more effective clean, completely remove the carburetor from the engine playing close attention to how all the parts fit in so that you can reassemble it quickly. Once you have dismantled the carburetor, place all the pieces in a container filled with carburetor cleaner.

4. Use Compressed air to dry

Allow to soak for up to an hour for effective cleaning of the parts. Next, rinse the parts with water and dry them under compressed air. Before reassembling the carburetor parts, ensure that you have completely air dried the parts.

5. Clean with a soft Clothe

Use a soft clean rag to gently wipe the inside of the bowl of the carburetor till it is completely clear of any debris or water. Any gas, dirt or water that might still be lurking inside will be completely removed.

Ensure you wipe gently because the carburetor cylinder is made of aluminum. Applying too much pressure can deform or distort the orientation of the carburetor cylinder.

6. Reassemble the Carburetor

Time to fit back the major component of the carburetor. If need be, replace all the nuts and bolts to ensure it is fitted properly to the engine deck.

7. Start up the Engine

Turn on the fuel and pull the starter cord to start up the engine. If all you did went well, it should start without any hassles. If it doesn’t start up or doesn’t work smoothly then the fuel line is still clogged or there is improper gas mixture at the carburetor.

8. Contact your local dealer

If you continue to experience problems with your carburetor contact a local dealer or technician for a professional fix.

Safety Tips

  • One of the major jobs of a carburetor is to form a homogeneous mix of highly combustible fuel sent to the engine. If you are to clean this delicate part, ensure there is no inflammable substance around.
  • Employ the use of safety goggles throughout the cleaning process to protect your eyes from toxic chemicals and vaporized hydrocarbons.
  • Carry out the cleaning in an open space where there is plenty of air and regular ventilation. The constant airflow will dissipate concentrated emissions from the cleaning agents.

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