How to Clean a 2-Cycle Weed Eater Carburetor

When you are an owner of a weed whacker, then it is highly possible that you will encounter a situation where the said garden tool does not start properly. At times, it might start but will not last for a long time. In such cases, there is one reason why the engine is not starting properly. The carburetor might be filled with gum. You might need to get a new carburetor instead.

While buying a new carburetor might be an easy solution, you can consider cleaning it up instead. By cleaning it up on your own, you can save money. Here are the easy steps to take when you want to clean the 2-cycle weed eater carburetor.

Step 1: You have to remove the breather plate from the engine of your weed eater. The breather plate is the black structure covering the outer side of the engine. Removing this will expose the carburetor. After that, you have to pull the two fuel lines away. These fuel lines connect the carburetor and the fuel container to each other.

Step 2: After pulling off the fuel lines, you can now take the carburetor. The carburetor will be fully exposed once you do that. Some of the carburetors will have different holes. These holes are normally where the cables hook up. You will need to take these cables out. Just remember what hole they were connected to since you need to return these cables to where they are originally connected to after you are done with cleaning.

Step 3: Since you have already taken off the carburetor from the engine, you now have to focus on it. Make sure to set the engine aside. Moving it out of the way can clear some space in front of you, making a better work space.

Step 4: Once you have the carburetor in your hands, find where the jets are. You will be pulling these jets out, after all. Before you remove these jets though, remember which one is attached to the low side and which one is on the high side. After you have taken them out, you will see that there is a spring and washer attached to them. See to it that you do not lose any of these items. You will not be able to find replacements for them.

Step 5: Unscrew the retaining plate affixing the primer bulb to the primer base. Once the primer base is freed from the carburetor body, you will be seeing the diaphragm and screen. With the screen, you will most likely see signs of gum clogging up the interior of the carburetor housing. The gum is what clogs the carburetor, preventing the entry of fuel.

Step 6: Unscrew the fuel pump diaphragm. The diaphragm, when it moves up and down, will push he needle seat inside which consequently lets fuel in. The fuel pump diaphragm is otherwise known as the metering diaphragm.

Step 7: Take out the screw right near the needle seat. Use your thumb to stop the needle seat from eventually falling off once the screw gets loosened as the spring might fall off as well. There is no replacement spring available in the market so do not lose it. Carefully remove the spring and washers inside the needle valve mechanism by turning the carburetor over. The needle seat, which is what stops the flow of fuel, should also be removed.

Step 8: Drop the carburetor housing inside a vat of ultrasonic carburetor cleaner for 15-30 minutes. Within the half-hour period, start wiping the parts you have disassembled.

Step 9: Figure out if the fuel pump diaphragm is damaged or not. If the plastic one has tear signs, then the fuel pump diaphragm should be replaced. On the other hand, the rubber will require replacement if it is stiff or hard.

Step 10: Put everything right back. You will have to put back in a last out-first in order. This means that the last item you have taken out should be the first item you put back. Be careful when assembling the carburetor back together. If you over tighten the screws or forget a component, the weed whacker will not work properly.


With these steps, you are sure to clean the carburetor thoroughly. The carburetor will be sparkling clean afterward. You can then use the weed whacker like its brand new after this cleaning process.

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