How to Adjust Chainsaw Carburetor?

If your chainsaw is running too lean (not getting enough fuel), or too rich (getting too much fuel), you can adjust the carburetor to compensate. To adjust a chainsaw carburetor, you’ll need a small screwdriver and patience. Start by adjusting the L screw clockwise or counterclockwise until the engine runs smoothly.

Then, turn the H screw until the engine idles at a higher RPM. Lastly, check that the T Screw is turned all the way in.

  • Park your chainsaw on a level surface and turn it off
  • Remove the spark plug using a socket wrench and pull it out of the boot
  • Inspect the spark plug for any damage or build-up and clean it with a wire brush if necessary
  • Reattach the spark plug to the boot and hand-tighten it with the socket wrench
  • Locate the carburetor adjustment screws on the side of the carburetor (there are typically two screws, one for idle speed and one for fuel mixture)
  • Turn both screws clockwise until they stop, then back them out 1 1/2 turns counterclockwise for a starting point
  • Start up your chainsaw and let it warm up for several minutes before making any further adjustments to avoid damaging the engine

How to Adjust Stihl Chainsaw Carburetor?

If you’re having trouble with your Stihl chainsaw, it might be the carburetor. In this blog post, we’ll show you how to adjust the carburetor on your Stihl chainsaw. We’ll also provide some troubleshooting tips in case you’re still having issues after adjusting the carburetor.

How Do You Adjust the L And H on a Chainsaw?

If you’re having trouble starting your chainsaw, or if it’s running rough, one of the first things you should check is the L and H settings. These two settings control the amount of fuel and air that reach the engine, and they’re usually marked with an “L” for low and an “H” for high.

To adjust the L setting, start by turning off the saw and removing the spark plug.

Then, use a flat-head screwdriver to turn the low speed adjustment screw clockwise until it stops. Next, pull out the choke lever and turn on the saw. Let it run for a few seconds, then turn it off.

Finally, reinstall the spark plug and test-run the saw again. The H setting is adjusted in a similar way, but you’ll need to use a Phillips head screwdriver instead of a flat-head. Start by removing the spark plug and unscrewing the high speed adjustment screw until it’s loose.

Next, turn on the saw and let it run for a few seconds before turning it off again. Finally, reinstall the spark plug and test-run the saw once more.

What is H And L on Carburetor Adjustment?

If you own a carbureted car, chances are you’ve had to adjust the carburetor at some point. But what do the “H” and “L” screws on the carburetor actually do? The “H” screw is the high-speed mixture screw.

This controls how much fuel is delivered to the engine at high speed. If the engine is running too lean (not enough fuel), turning this screw clockwise will deliver more fuel. Conversely, if the engine is running too rich (too much fuel), turning this screw counterclockwise will reduce the amount of fuel delivered.

The “L” screw is the low-speed mixture screw. This controls how much fuel is delivered to the engine at low speed. Just like with the “H” screw, if the engine is running too lean, turn this one clockwise to deliver more fuel.

And if it’s running too rich, turn it counterclockwise to reducefuel delivery. Both screws should be adjusted in very small increments until you find the perfect mixture for your engine. It’s important not to make large adjustments, as that can cause your engine to run poorly or even damage it.

What is the L And H on Chainsaw?

The L and H on a chainsaw stand for low kickback and high safety. Low kickback means that the saw will not easily move backwards when it comes into contact with an object. This is important because it reduces the risk of injury to the user.

High safety means that the saw is designed to be used safely and efficiently. It has a guard to protect the user’s hands and fingers, and it also has a brake to stop the chain if it gets tangled.

How Do I Know If My Carburetor Needs Adjusting?

If your engine is running rough, it could be a sign that your carburetor needs adjusting. Other signs include a loss of power, poor fuel economy, and stalling. If you suspect your carburetor needs adjusting, take it to a mechanic or do it yourself if you’re confident in your abilities.

To adjust the carburetor, you’ll need to first identify the problem. If the engine is running too lean (not enough fuel), you’ll need to turn the screw labeled “L” clockwise. If the engine is running too rich (too much fuel), turn the screw labeled “R” counterclockwise.

Make small adjustments and test-drive the vehicle after each adjustment to see how it affects performance.


If your chainsaw starts to act up, one possible culprit is the carburetor. You can try adjusting it yourself, but if you’re not comfortable doing so, you can take it to a professional. Here’s a quick overview of how to adjust a chainsaw carburetor:

First, make sure the saw is turned off and cooled down. Then, remove the air filter cover and unscrew the two screws that hold the carburetor in place. Next, locate the idle speed screw and turn it clockwise until the chainsaw idles smoothly.

If it still seems rough, turn it another quarter turn or so. Now find the low-speed adjustment screw and turn it counterclockwise until it’s about halfway out.

Finally, replace the air filter cover and screws, and start up your chainsaw to test it out.

Danyl Dmitry

Leave a Comment

Your email address will not be published. Required fields are marked *