Weed Eater Stalls When Given Throttle [Solved]

Sometimes this is very annoying when you give throttle to your weed eater, and it loses power or stalls. If you have been using your weed eater for a long time then this is a common problem that many lawn owners face.

There are several reasons behind your weed eater stalls when given throttle, such as problems with fuel intake, the exhaust filter would be choaked, the spark plug clogged with carbon, etc.

Doing short of repairing work on your own would save hundreds of dollars that you were going to spend in the repair shop. Trust me this sort of troubleshooting work gives you satisfaction as you will learn something new and nothing can be better than this if the problem is solved by the end of the day.

Troubleshooting Of Weed Eater Stalls When Given Throttle

The problem could be anywhere in your machine. Here, we will try to troubleshoot every part of the weed eater and will try to repair, or replace them if needed.

1 . Check If You Are Not Using A Wrong Fuel In Your Weed Eater

The energy food of your weed eater is gasoline, and fuel companies mix ethanol in gasoline. The quantity of Ethanol in gasoline doesn’t help to increase the power of your weed eater but it contains oxygen molecules. It helps in the complete combustion of fuel and limits the emission of poisonous gases into the atmosphere and that way helps to reduce pollution.

The quantity of ethanol in gasoline should not be greater than 10% otherwise it will impact the power efficiency of your weed eater and would damage engine parts.

2. Check The Fuel Filter

If you are using the wrong type of fuel in your weed eater then there are chances of its fuel filter getting clogged by impurities and the engine does not get enough fuel supply to work normally. This could be the possible reason behind the weed eater stall after being given its throttle.

Solution: The solution is pretty simple. Just remove the fuel filter from the fuel tank, and try to clean it thoroughly. Your problem will be sorted out immediately if this is the main cause of the problem.

Poor quality of the fuel supply makes the filter clogged and it is unable to filter the fuel, in that scenario you have to change it with the new one.

Also Read: Echo SRM225 Only Runs On Choke [Solved]

3. Check The Exhaust Screen

An exhaust screen on the muffler works as an extractor that extracts the waste air particles outside the engine. Sometimes it gets clogged and this is the main reason that your 2-stroke engine dies when the throttle is applied. Exhaust Screen clogging also makes your weed eater engine too hot and your weed eater stops due to loss of power.

A popular brand named Stihl Weed Eater has some problems like Stihl Weed Eater bogs down when I give it gas and it can be solved by cleaning its Exhaust screen.

Normal clogging could fix by cleaning it but if the filter is damaged then it should be replaced immediately.

4. Check The Primer Bulb

The primer bulb is a very small but very important part of a weed 2 strokes engine. Normally it is filled with fuel and when pressed it releases the air and creates a vacuum inside the carburetor. It means that there is no air inside it and due to the lack of fresh fuel inside the carburetor, it becomes difficult to start the combustion process.

Problem & Solution: Sometimes the primer bulb doesn’t have fuel inside it, so make sure that the primer bulb has enough fuel before starting the engine, to fix this issue you need to press it 4 to 5 times to get the fuel inside the carburetor. With the passage of time, they got rotted and cracked and that allow air inside it instead of fuel.

In such cases change them immediately to fix the weed eater start but won’t stay running problem.

5. Check The Air Filter

The combustion process starts when the predefined ratio of fuel and air enters the engine. An air filter ensures that fresh air is entered inside, and when it is clogged then it halts the proper airflow. This would be the one reason behind the weed eater 2 cycle engine starting but won’t stay running.

Solution: The air filter is easily accessible in some models, and it can be removed by just rotating a single screw or a knob. Now clean it, if you find, it is heavily clogged and cleaning is not possible then replace it.

6. Examine The Carburetor

Most people find it one of the most technical parts of a weed eater. A carburetor helps in the combustion of fuel with the presence of air. If the carburetor is clogged your weed eater won’t start properly, and it will die after a few attempts of the throttle.

Solution: You can clean it by using a carburetor cleaning kit and if the problem persists even after cleaning it then you need to replace it with the new one.

7. Examine The Choke of The Weed Eater

Choke is a very important part of your weed eater. It helps to start the engine of your weed eater when the engine becomes cold due to not using it for a long time, especially in winter.

The choke is attached to the carburetor and located at the backside in some models, your’s maybe in a different position. When the choke is on it regulates the fresh air inside the carburetor to start the combustion process, and when it is off, it prevents air to enter inside.

It has a spring that closes or opens it when required. Sometimes it not functioning well due to this engine won’t work correctly.

Solution: You need to check the spring that closes the path of the air and opens it automatically by the instruction of a temperature sensor.

If the problem remains unsolved then you need to go ahead and check the next part of your weed eater.

8. Check The Diaphragm Properly

This is a part of the carburetor of your weed eater, and sometimes its flap cracks or wears out. Due to this most of the weed eaters become stall after trying to give them throttle.

Solution: The solution is very simple, you need to change this flap with the new one and your task will be completed. If the problem is in this portion, you don’t need to do anything after fixing the diaphragm.


A Weed eater is not a big machine. It is a small device whose parts are very limited, and can easily troubleshoot it if you spend time understanding it. In most cases, you don’t need to contact either a manufacturer service center or to visit a mechanic shop.

You can short out some issues on your own until there is no serious problem with your weed eater.

About The Author


Adam is here, I'm an Editor and writer on guidingpapa. I love to share home improvement tips and new ideas in this blog. I have been doing this from couple of years and I'm very passionate about it.

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