Fix Your Predator 4000 Watt Generator Carburetor Easily

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Fix Your Predator 4000 Watt Generator Carburetor Easily

Table of Contents:

  1. Introduction
  2. Preparation and Disassembly 2.1 Removing the Air Filter Cover and Filter 2.2 Removing the Fire Arrester 2.3 Removing the Vent Line and Clamp 2.4 Draining the Gas from the Generator 2.5 Cleaning the Gas Tank
  3. Disassembling the Carburetor 3.1 Removing the Gasket and Choke Handle 3.2 Removing the Bowl and Float 3.3 Cleaning the Main Jet 3.4 Cleaning the Carburetor with Acid
  4. Cleaning and Reassembling 4.1 Cleaning the Bowl and Needle Valve 4.2 Reassembling the Carburetor 4.3 Reinstalling the Air Filter Assembly 4.4 Reinstalling the Spark Arrestor 4.5 Final Steps and Testing
  5. Conclusion


In this guide, we will walk you through the process of cleaning the carburetor on a Predator 4,000 watt generator. A clean carburetor is crucial for the smooth operation of your generator and ensures optimal fuel efficiency. By following these steps, you can easily maintain your generator and enjoy reliable power output.

Preparation and Disassembly

Before diving into the carburetor cleaning process, it's essential to prepare the necessary tools and disassemble the generator correctly.

Removing the Air Filter Cover and Filter

Start by removing the air filter cover to access the carburetor. Use a wrench to loosen the bolts holding the cover in place. Once the cover is off, remove the air filter and inspect it for dirt and debris. If necessary, clean the filter or replace it with a new one.

Removing the Fire Arrester

The fire arrester is a protective device that prevents backfires from burning the air filters. Remove the fire arrester by unscrewing the bolts with a 10mm wrench. Take care not to damage it during the removal process.

Removing the Vent Line and Clamp

Next, remove the vent line connected to the valve cover. This line is not fuel-related, so there's no need to worry if it gets cracked or damaged. Use pliers to loosen the clamp and remove the vent line, clearing the way for further disassembly.

Draining the Gas from the Generator

To ensure a thorough cleaning process, it's essential to drain all the gas from the generator. Avoid using the old gas and aim to dry the fuel tank completely. You can use an air hose from a compressor to assist in the draining process. Refer to the description below for all the necessary parts for this job.

Cleaning the Gas Tank

Inspect the gas tank for any black tar or debris. If present, use diesel fuel to soak the affected areas and rinse it thoroughly throughout the day. This process will help remove any residue or contaminants from the tank.

Disassembling the Carburetor

With the generator properly prepared, it's time to disassemble the carburetor for thorough cleaning.

Removing the Gasket and Choke Handle

Begin by removing the gasket that seals the carburetor to the engine. Depending on where it sticks, leave it on the engine or the carburetor. Take extra care not to tear or damage the gasket during the removal process. Additionally, remove the choke handle to avoid the inconvenience of having to replace the entire carburetor.

Removing the Bowl and Float

Use a 10mm wrench to remove the bolt at the bottom of the carburetor bowl. If the gasket stays on either the engine or the carburetor, leave it in place and reuse it. Once the bowl is off, locate the pin holding the float in place. Gently pull the pin to remove the float assembly and then proceed to detach the float itself. Be cautious not to lose any components during this step.

Cleaning the Main Jet

To clean the main jet, use a flat-head screwdriver with ground-down sides to unscrew it from the carburetor. If the jet is stubborn and starts to strip, avoid further damage by stopping and cleaning the carburetor's interior instead. For effective cleaning, use acid such as 14-karat gold testing acid. Please note the precautions mentioned on the acid's packaging, and ensure you wear protective gear when handling it. Only this particular acid is recommended, as using the wrong type can lead to damage to the aluminum.

Cleaning the Carburetor with Acid

Apply one drop of acid inside the carburetor and allow it to sit for a few moments. Rinse it out using carb cleaner, spraying it slowly to remove any residue. Repeat this process until the carburetor is clean and free of debris. Take caution when handling the acid, ensuring it doesn't come into contact with your skin or eyes.

Cleaning and Reassembling

Now that the carburetor is disassembled and cleaned, it's time to clean the bowl and needle valve and proceed with the reassembly process.

Cleaning the Bowl and Needle Valve

Pour carb cleaner into the bowl and use a screwdriver to scrape and remove any dirt or residue. Rinse the bowl thoroughly and then put your finger over the hole to prevent any leaks. Continue cleaning by applying more carb cleaner and rubbing the interior with your finger or a cloth. Ensure the needle valve is also clean and free of debris.

Reassembling the Carburetor

Reassemble the carburetor by placing the float needle valve back in its position. Use the pin to hold the float in place, ensuring it moves freely. Attach the bowl back onto the carburetor, ensuring the bolt faces the opposite side of the fuel inlet. Clean the bolt if dirty before securing it in place.

Reinstalling the Air Filter Assembly

Once the carburetor is ready, reinstall the air filter assembly. Position the assembly and tighten the two 10mm nuts at the front and the 8mm nut at the back. Don't forget to reinstall the spark arrestor and secure it properly.

Final Steps and Testing

Before finishing, be sure to reconnect any tubings and lines that were previously removed. Double-check that everything is securely in place. Fill the gas tank with fresh fuel, ensure the switch is on, and attempt to start the generator. If the generator starts successfully, you can turn off the choke and proceed with testing.


Cleaning the carburetor on your Predator 4,000 watt generator is a crucial maintenance task to ensure optimal performance. By following these step-by-step instructions, you can keep your generator running smoothly and extend its lifespan. Regular cleaning and maintenance will also ensure better fuel efficiency and fewer issues in the long run. Remember to refer to the parts mentioned in the description below for convenience.

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