How To Tune A Chainsaw Carburetor In 5 Simple Steps

chainsaw sharpening

Chainsaws are considered as common household items nowadays especially in areas that have harsh winters or in large properties. This is simply because chainsaws can help you to make firewood easily and it can also be used to help you cut down and maintain small to large trees in your land.

There are a lot of chainsaw products available in the market today, but buyers and owners have to understand that even if you bought an expensive or a high quality one, maintenance checks will always be a necessity. Whether you like it or not, you might have to tune its carburetor in the future.

Tuning the chainsaw carburetor is necessary especially if you notice that the chainsaw no longer revs smoothly whenever you try to increase the speed. It is also needed when the chainsaw starts to emit clouds of smoke. To help you fix it, here’s how to tune a chainsaw carburetor in 5 simple steps.

Things You Need To Prepare

1. A Workbench

A Workbench

The chainsaw is a very dangerous machine and it can cause accidents and injuries especially if you are not going to put it on a sturdy surface. Use a workbench if you have one and make sure that there are no kids or pets around. You can use a sturdy table if this is not available.

2. Chainsaw Gloves

using protective chainsaw gloves

So you can avoid injuring your hands on the chain, you need to use chainsaw gloves. You can also opt to use work gloves if this is not available. You might also be able to use rubber gloves, leather gloves or other tight fitting gloves so you can protect your hands from the fuel or the oil.

3. Tools


Depending on what type or model your chainsaw is, you might have to use screwdrivers and wrenches in order to access the carburetor as well as to make sure that you can tune up the carburetor screws. You can also opt to use pliers or electrical tools if you have them so you can easily do the job.

4. A New Air Filter

air filter

This will be used just in case the old air filter is too dirty or if it is already damaged. A new air filter will ensure that the carburetor can run properly without the presence of any clogs.

5. A Tachometer

a tachometer

This will be used so you can easily measure the RPM of the chainsaw’s engine. Having this is quite important since it can help you avoid adjusting the carburetor to dangerous levels.

6. The Chainsaw’s User Manual

reading the user manual

You need this to know exactly how to open the housing or access the carburetor. It can also help you avoid damaging the chainsaw. If you no longer have it, try to download it online or try to ask someone who knows how to fix your chainsaw model.

How To Tune A Chainsaw Carburetor In 5 Simple Steps

Step 1: Making The Necessary Preparations

wearing protective gloves holding chainsaw

Wear your chainsaw gloves so you can avoid cutting your hands with the blade. Put the chainsaw on the workbench and make sure that there are no kids or pets in the area. Make sure that the chainsaw is properly turned off and that it will not get accidentally turned on.

As soon as the chainsaw has been secured, you should try to get the manual so you will know how you can safely open up the chainsaw housing and access the carburetor. Use the different tools necessary to open up the housing. Inspect the chainsaw so you will know if it needs a thorough cleaning.

Step 2: Clean The Air Filter


Tuning up the carburetor will not just mean making sure that it revs up properly. To ensure that it will run without any problems, you have to make sure that the air filter is clean. If not, you can try to clean it or opt to replace it with a new one.

Step 3: Check The Carburetor’s Adjustment Screws

cleaning carburator

In most cases, the carburetor has three adjustment screws. If these screws are not tuned properly, the chainsaw can easily suffer from different issues. Check the carburetor’s idle speed screw if the chainsaw keeps on turning off at idle speed. After that, you can check the low speed adjustment screw.

If this screw is not properly adjusted, the chainsaw can bubble up during idle and die. If this screw is too lean, the engine can easily starve and die. After checking this screw, you should look at the high speed adjustment screw. This is what controls the air and fuel mixture and it has to be properly set.

Step 4: Start The Warm Up Process

pouring oil into chainsaw

You will then have to check whether the chainsaw has enough fuel. If it does not, add more so you can check the carburetor properly. Start the chainsaw and allow the engine to run for at least 3 minutes to warm up the unit. As soon as the engine is warm, it is now time to adjust the screws.

Step 5: Adjusting The Screws

fixing a carburator

Set the idle first, making sure that the speed is at 2700 rpm. A tachometer will help you with this. If you do not have one, you can let the unit idle as high as possible without the clutch. Set the low speed screw and turn it to allow the chainsaw to starve, make a mental note of the position of the screw.

Next, you should try to adjust the same screw until the engine runs better until it loads up. Now adjust the screw halfway between the lean and rich setting. You should then change the high speed adjustment screw. You should adjust it until the chainsaw makes a slightly rough sound.


When it comes to tuning up your chainsaw carburetor, you need to put your safety first. Wear the safety gear and try to buy or borrow a tachometer so you can adjust the chainsaw to precise settings. Make sure that you try to adjust the 3 carburetor screws until the chainsaw is able to idle and run properly.

About the Author Emily Taylor

My name is Emily Taylor, gardening is my passion and I’m looking forward to sharing it with everyone. I know that there are millions of people out there want their backyard and garden be attractive just like their front yard, so I am here to help you create your own backyard paradise.

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