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What Causes a Weed Eater to Bog Down? It Could Be An Easy Fix!

What Causes a Weed Eater to Bog Down? It Could Be An Easy Fix!

What Causes a Weed Eater to Bog Down

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Doing some lawn trimming work can be an easy and straightforward job when you are using the right equipment, which is good working order. If you are using a weed eater, then it is likely you are operating either an electric or a gas powered unit to do the maintenance work.

Unfortunately, even if your power tool is from a leading brand, it may sometimes get bogged down and stop functioning well. Rather than getting frustrated in such times, find out what causes a weed eater to bog down here below and solutions to fix the problem instantly.

The first place to start troubleshooting your weed eater is to ensure that the unit is actually turned on. Confirm that the switch is in the desired ON position.

If you are using a gas unit, ensure there is adequate fuel available in the device. For those an electronic weed eater, ensure that you have plugged it properly into the appropriate outlet.

Check the Engine Condition

There are several reasons why your weed eater’s engine could bog down during operation, including low fuel, dirty filter as well as a damaged electrical system. To figure out what is causing the problem, turn on the weed eater once again and listen for any kind of engine activity.

Fixing a stalled engine that will simply not start will likely require more advanced skill-set than most people have. However, if your engine sputters first before it dies, then it is much easier to fix.

Adjust the Air Filter

As mentioned above, always start with problems that have easy fixes, such as checking your weed eater’s air filter. If the filter is left wide open, then your engine is probably getting excessive air, which leads to choking.

Likewise, the filter can also get clogged up by debris and dirt, which affect proper air flow and thus the engine will stall. So, the key here is to aim for that perfect middle ground by reinstalling the air filter properly or replacing it altogether.

Once you have made the necessary adjustments to the air filter, switch on your weed eater and check whether it is running properly. If you do not get any more problems, either with stalling or choking, then you have successfully fixed the problem.

However, if the device is still not functioning smoothing, then you need to continue the troubleshooting below by checking other problem areas.

Fuel Problems

A common reason for what causes a gas weed eater to bog down is actually insufficient fuel. To check whether this could be the cause for your problem, check the amount of fuel you have in the tank. If you discover that you have enough fuel but your machine does not start, then examine the fuel tubes.

Sometimes the tubing can be damaged or disengaged and this means that your engine is not getting the energy source it needs for proper functioning.

It is generally recommended that you only use fuel that is not more than 3 months old to power your weed eater. This is because old fuel may not move fluidly enough through the engine’s carburetor and thus prevent it from starting. Also, keep in mind that gasoline and oil usually separate with time and thus you should first shake your fuel mixture before filling your tank.

Sometimes numerous attempts to switch on a weed eater can also cause problems. In this case, the engine gets flooded with too much fuel and is therefore unable to start. To fix this problem, simply drain out the excess fuel.

Follow the manufacturer’s guidelines on draining fuel that specific trimmer. Additionally, you may have to repeat that procedure several times until the weed eater starts. Check out additional information on proper fuel use here!

Spark Plug Problems

Even if you are using a clogged air filter or badly mixed fuel, your gas weed eater should still give you some kind of response when you start it up.

However, if you are not even getting a splutter from your engine, then the issue may be with the spark plug. A dirty spark plug is a common issue and it hinders the sparks that help fire up the engine.

Fortunately, this problem can be fixed easily by cleaning the plug using some gasoline and a wire brush. You should also check whether the spark plug has any cracks and replace with a new one if you find that it is damaged. Compared to other parts of a weed eater, replacing spark plugs is usually very inexpensive and does not require a lot of technical knowledge.

Electrical Problems

Diagnosing an electrical weed eater is also very straightforward since the most likely cause is generally the cause.

Begin by checking whether the extension cord works and is firmly plugged into the right electrical outlet. If the extension cord is faulty, use a different extension cord. It is better to go for a high quality extension cord to prevent future problems.

Additionally, check the circuit breaker or fuse that supports the specific electrical outlet where you have plugged in your weed eater to make sure there is no issue with your electrical power.

Reset the Screws

The low and high screws on the weed eater could also be the culprits that are causing the engine trouble. Ensure that you have properly set them in their right positions.

You can make half turn adjustments in opposite directions to find the best position. Normally, the engine will start functioning once you screw in the correct setting.

Engine Running Rough or Choking

Also consider purchasing a new carburetor kit. Fuel lines and filters can easily get gummed up it the trimmer is left sitting unused for more than a month at a time.


After reading all this information, you should now be able to understand what causes a weed eater to bog down. Generally, once you figure out the main cause of the problem, you can easily fix your machine and resume your maintenance work.

It is good practice to service your machine regularly to keep it in great shape. Additionally, ensure you are using the weed eater for the right kind of tasks and that you are not overworking it.

Also compare battery powered vs. gas powered string trimmers if fuel mixes and engine parts seem to confuse you.

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