How to Clean a Generator Carburetor?

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In order to prevent your generator from breaking down, regular maintenance is necessary. If your generator fails to start after being off for a while, chances are the carburetor is to blame.

It is a challenge to remove and clean a carburetor, but you are not alone in this effort. It is necessary to disassemble, clean, and reassemble many small parts.

How to Clean a Generator Carburetor?

So, do you want to know how to clean a generator carburetor? Keep reading because now you will not only receive guidance but also be informed of the signs and other details.

Also Read: Best Portable Generators to Use

Carburetor Cleaning Signs

Before attempting to clean the carburetor, make sure the generator displays the following signs:

Grime in the Carburetor Bowl

A generator’s fuel bowl is one of the most important parts to inspect when performing regular maintenance. Carburetor status can be derived from it in many ways. 

The needle valve becomes blocked and unable to close if there is debris or dirt in the fuel block. Overflowing fuel can upset the oxygen-fuel ratio since it will enter the carburetor and exit through the fuel bowl vents. 

Furthermore, wet spark plugs make it difficult to start the generator.

The Generator Runs Roughly

Black smoke or popping in the engine are symptoms of an overly rich or lean fuel mixture, which is typically caused by a dirty carburetor.

The Generator Has Flooded

Occasionally, fuel can clog carburetor bowl vents, resulting in overflow and ignition spark plug dripping.

The Steps To Clean A Generator Carburetor 

Be sure to have all the cleaning tools you need before you start cleaning a carburetor. Clear enough space around all parts to ensure their safety. Moreover, you can easily clean any oil spilled when cleaning the carburetor. 

Step 1: Collect these Tools

You will need the following tools:

  • Small and large flathead screwdrivers
  • Ratchet and 8-millimeter socket
  • Cleaning rags
  • Goggles for safety
  • Cleaner spray for carburetors
  • A twist tie’s inner wire
  • A Straw nozzle insert for the cleaner

So, after gathering all the equipment, we are done with the first step

Step 2: Disconnect the spark plug’s rubber boot

After removing the rubber spark plug cap, it is best to keep the fuel valve closed so that petrol does not leak into the carburetor.

Step 3: Unclasp the cover to reveal the nuts

You need to remove the air filter cover to get to the nuts holding the whole assembly together. Remove these – depending on your model, you might have two or three on the reverse side.

Step 4: Unplug the carburetor bowl drain plug

You’ll need a 10 mm wrench and a glass jar. You will need to remove the carburetor bowl drain plug.

Step 5: Drain the gasoline into the container by unscrewing the plug

Make sure the gasoline has drained, and then screw the plug in securely.

Step 6: Remove all carburetor hoses

Carburetor connections, as well as choke and throttle connections, get disconnected. By turning the throttle a bit, you can remove the linkage from that end.

Step 7: Disconnect the carburetor from the engine and remove the nuts 

Remove the two nuts holding the carburetor to the support, and then the carburetor itself.

Step 8: Remove the carburetor screw with a socket or wrench that measures 10 mm in diameter

By removing the bolt at the bottom of the carburetor with a 10 mm socket or wrench, you can remove the bowl. Check the carburetor for as much oil and varnish on the gas as possible.

Clean the carburetor bowl first with the rubber gasket removed. It is difficult to reinstall the rubber gasket after cleaning it with the cleaner

Step 9: Disconnect the supply line from the main jet

Identify the main jet within the distribution tube and remove it. It connects the carburetor’s bowl to its throat. You’ll need a flathead screwdriver for this.

Step 10: Disconnect the emulsion tube

The emulsion tube above the jet in the distribution tube must be removed. Once the jets are removed, the tube falls out.

Step 11: Remove the float, either by pulling out the left pin or by pulling out the right pin

The float can be released by pushing the retaining pinout.

Step 12: Install the throttle adjuster screw 

You need to make a certain number of turns. Write it down. Complete the turn. Screw it in again when you later reinstall it, then undo all the changes you made earlier.

Step 13: Remove the plastic piece under the screw

If you have an adjustment screw, there should be a small piece of plastic underneath it. Take it out. It will pop out.

The idle jet will be lower than that. Use a flat-head screwdriver to remove it.

Step 14: Remove the screw controlling the fuel-air mixture

A spring protects the adjustment screw from vibration, just like the throttle adjustment screw. 

Turn it as many times as it takes to tighten it. If it needs several turns, install it completely, then back it out according to how many turns it requires.

Step 15: Inspect the idle jet, the main jet, and the emulsion tube 

Small holes can easily be blocked. Blocking a hole will hinder the engine’s performance or cause it to stop entirely. Blocked main jets are the primary cause of failures to start. A blocked main jet usually causes the engine to surge at idle.

Step 16: The valve needle seat hole will now get blasted with carb cleaner

As soon as the carb cleaner has passed through the valve needle seat hole, it spouts out of the fuel line connection. 

Point it away from you.

Step 17: Reinstall the needle, float valve, and retaining pin

Replace the needle valve and float by inserting the pin into the retaining hole. The float sits on top of the carburetor upside down. 

The tube has to be blown through.

Step 18: Reassemble in reverse after cleaning

After completing the process of cleaning, reverse the process. Clean up afterward.

How to Clean a Generator Carburetor Without Removing It? 

Without removing a carburetor, cleaning it properly is virtually impossible. To clean a carburetor, it must be drained completely, all parts must be checked, and all passageways must be cleaned.

If you do not remove the carburetor, you will not be able to access all of its components and areas where the residues can build up. The perfect cleaning of the carburetor can be done by the removal of residue.

You can spray Gumout directly into the carburetor, or mix it with fuel, such as SeaFoam Motor Treatment. It is typically possible to remove residue and minor carburetor clogging with these kinds of products, improving the performance of the generator.

Use the product in accordance with the instructions given by the manufacturer. You may want to try several such products before making a decision.

If cleaning sprays and fuel additives fail to work, you should take the generator carburetor apart, clean it thoroughly, and reassemble it. 

A small engine mechanic can help you with this task if necessary.



You won’t have to worry about your carburetor getting out of order soon if you keep it well-maintained. By following the steps described above on how to clean a generator carburetor, your generator carburetor will be efficiently cleaned.

Nonetheless, if you still don’t feel like cleaning it yourself, you can call a generator expert who will clean it for you.

I hope this article helped you understand how to clean a generator carburetor.

It would be great if you shared this article with your friends and those experiencing the same issue. Feel free to leave a comment as well.

It's Carl Denis here, and I'm glad you found my site. As a generator enthusiast, I write on MyGeneratorLab. In spite of our trusty RV being used virtually every day on worksites, my wife and I go on road trips every weekend with our family in it. As part of my mission, I aim to provide information that will assist you in choosing the right generator.

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