Quck answer
If your string trimmer is flooded, follow these steps to unflood it:
1. Turn off the trimmer and remove the spark plug.
2. Empty the excess fuel from the spark plug hole.
3. Pull the starter cord several times to clear any remaining fuel from the engine.
4. Clean or replace the spark plug if necessary.
5. Make sure the air filter is clean and not clogged.
6. Refill the trimmer with fresh fuel.
7. Start the trimmer and let it run for a few minutes to ensure it is working properly.
By following these steps, you can easily unflood your string trimmer and get it back in working condition.
In order for a string trimmer to start, fuel needs to be supplied to the carburetor. Manufacturers typically provide two methods for this. The first is a choke, which partially closes the carburetor to create a richer fuel mixture while the engine is running. The second method is a priming bubble, which injects fuel directly into the carburetor when pressed.
If your string trimmer has a weak spark or old fuel, it may not start immediately when you pull the cord. It may be tempting to keep the choke on or continue priming the bulb until the carburetor has too much fuel, but this can flood the engine. When the engine is flooded, the spark plug can become partially submerged in fuel and fail to ignite. However, there is a simple solution to this problem.
How to Fix a Flooded String Trimmer
Unlike a car engine, which requires waiting for the carburetor to drain for 10 or 20 minutes before starting, a string trimmer can be fixed without any delay. Follow these steps:
Step 1: Disable the Choke
Move the choke to the “off” position. Some models may label this position as “run,” or it may be indicated by a single vertical line instead of two vertical lines for the “choke” position. If your trimmer has a priming bulb, you don’t need to worry about the choke, but remember not to press the priming bulb.
Step 2: Engage the Throttle
Press and hold the throttle all the way down, as if you were operating the trimmer at full speed.
Step 3: Pull the Starting Cord Rapidly
While still holding the throttle, pull the starting cord repeatedly. Eventually, the engine will sputter, and if you continue pulling, it will start running. Once the engine starts, release the throttle gradually until it runs smoothly.
Why This Method Works
By opening the choke and engaging the throttle, each time you pull the cord, a small amount of gas is drawn from the carburetor and combustion chamber. While this gas doesn’t ignite, it is expelled through the exhaust. Over time, the ratio of gas to air in the carburetor becomes lean enough for the spark to ignite it.
To expedite this process, you can improve air circulation in the carburetor by removing the air filter. However, remember to replace it as soon as the engine starts running and the trimmer operates normally.
How to Maintain Your String Trimmer
If you frequently experience difficulties starting your trimmer, performing regular maintenance can help restore its performance:
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Change the spark plug.
Spark plugs eventually become corroded, or the terminals become covered with carbon. You have the option to clean a spark plug, but since plugs are not expensive, it is better to replace it.
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Clean or substitute the air filter.
Filters are also affordable and easy to replace, but giving your air filter a good cleaning with soap and water usually works as well.
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Modify the carburetor.
Follow the instructions provided by the manufacturer for adjusting the carburetor screws, especially the idle and low speed adjustment screws.
