Understandably, number of beginner gardeners don’t know how to readjust a carburetor on a weed eater.

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A gasoline engine such as a chainsaw or a weed eater usually consists of a carburetor come ensure suitable combustion.

Adjusting a carburetor is simpler than you think. This write-up will show you how to do it on her own.

What is a weedeater carburetor?

A carburetor plays crucial role in keeping efficient combustion by mixing gas and also air because that four-stroke and also two-stroke engines.

This an equipment allows air and gas to interact, create an explosion, and also burns the mixture within the engine cyclinder.

The carburetor suck the waiting inside through a suction pipe called venturi. When the waiting is coming in, gasoline is exit via a spray nozzle, top to burning that creates power.

Once you press the engine’s throttle, fuel is provided to the burning section that the carburetor. The throttle’s position determines just how much fuel it gives to the engine.

When you accelerate this part, the sends an ext gas and also air to the combustion section.

The carburetor’s placement/position tends to deviate end time. If this instance happens, the weed eater will challenge a lack of fuel, therefore we need to prevent that from keep going by adjusting the carburetor.

There are two item you require to complete this task, consisting of a socket opener and a screwdriver. The next component of this article will clarify the thorough procedure of how to adjust a carburetor.

How to change a Carburetor ~ above a Weed Eater 

Before adjusting the carburetor top top a weed eater, you need to remove debris and also dirt indigenous the air filter. Usage a driver to open the air filter cover, then carefully clean it v a soft cloth.

You should also make certain the spark plug is tho in good use. Open up the sheathe boot with a screwdriver, then remove it v a spark plug wrench.

This step permits the adjustment procedure to occur without any type of hassle.

If your carburetor’s trimmer has actually been inactive because that a while, the engine can have trouble beginning due to stale or overstayed fuel. The just thing you have to do is to replace it with new fuel.

Finally, if you hear a weird noise when beginning your engine, then it’s time you change the carburetor.


There space two fuel convey screws on every side the the carburetor, namely HI and LO. While hello screws administer the engine as soon as it works at complete throttle, LO screws ensure enough fuel regulation when it is in idle mode.

If you desire to know just how HI and LO screws look, look in ~ the different varieties of the screw here.

In the 2nd step, use a screwdriver and also tighten the screws to place the screws towards the carburetor’s jets. The needle end of the screws allows you to align castle in the correct direction.

Remember to rotate your weed eater off prior to you continue this step.

The most important step is to readjust the screws. After adjusting the hello screw counterclockwise for about one and also a half turns, rotate the LO screw in the exact same direction because that one turn.

Next, start the engine after pulling out the choke. The may create a rough sound due to the fact that of the recently tightened screws, so don’t worry. You can need to advice the accelerator to keep the engine running.

After a couple of minutes, your engine will certainly be warmth enough, which is a perfect state because that adjustments.

Step 4: while the engine is running, start transforming the LO screw counterclockwise

This is the final adjustment stage. While the engine is running, you have the right to start turning the LO screw counterclockwise to see whether the still running smoothly without dying or stalling.

Make sure the running rate is average, which method not also fast and not as well slow.

Next, collection the engine to the complete position by advertise the throttle.

Your engine can sputter at some point, for this reason it’s really important to readjust the hi screw clockwise so that the weed eater releases a normal sound while running smoothly.

It is recommended that you rotate the hi screw for around 1¼ turns.

However, you should read the hand-operated instructions very closely for a much better understanding together the number of turns relies on your weed eater’s capacity, brand, and also size.

Step 5: perfect carburetor adjusting

You’ve finished adjusting the carburetor. However, you’re argued to keep the engine running for observation. Also, mental to bring your screwdriver along in instance of minor adjustments.

At some point, the weed eater could still develop weird sounds. That’s as soon as you have to examine whether the gas is fresh or not.

Even despite you’ve just changed the carburetor, poor gas still outcomes in bad operation.

Poor gas quality usually outcomes from it being kept during the winter or once water slips in from the outside.

It’s straightforward to settle this difficulty by refilling new fuel after ~ removing the old gas native the tank.

There have the right to be minor engine troubles with her trimmer together well, so girlfriend had far better check the carburetor to check out if there is any kind of dirt or feet in the valves.

After clean this component up, her carburetor will be all set to get earlier to work.

Once the weed eater operation smoothly and also releases typical sounds, you deserve to start putting it to usage again.


Adjusting a carburetor top top a weed eater is a straightforward procedure that you can do by you yourself if you monitor the instructions in this post thoroughly.

Nevertheless, if you room not confident or comfortable moving out this process, girlfriend might take into consideration calling a professional technician to assist you.

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