Adjusting the idle on your chainsaw is a relatively easy process that can help ensure that your saw performs to the best of its ability. To adjust the idle on most chainsaws, start by allowing the saw engine to completely warm up.
Once the engine is warmed up, locate the idle screw, which is typically near the back or side of the engine, and turn it in a slow and steady manner until you hear the engine speed increase slightly.
Allow the saw to idle for a few moments, and then adjust the idle screw in the opposite direction until the engine settles back to its original idle speed. Make sure not to over-tighten the screw, as too much tension can cause the chain to sputter or even stop the chain entirely.
You can also adjust the tension of the chain to keep the chain running continuously. You can do this by loosening the front and rear nuts around the chain’s guide bar, then tightening the guide bar screws until the chain is as tight as possible while still running smoothly.
Once you are satisfied with the chain’s tension, re-tighten the front and rear nuts to ensure that the chain retains its tension while in motion. Once you have completed these steps, your saw should run with a consistently smooth idle.
What would cause a chainsaw not to idle?
The primary cause of a chainsaw not idling properly is a loose or clogged carburetor. This issue can be caused by a variety of different situations; such as unclean or expired fuel, a dirty air filter, or a malfunctioning idle adjustment control.
Another possible cause could be a clogged throttle body. Additionally, a loose or faulty spark plug or spark plug wire can interfere with the engine’s ability to idle. Finally, a malfunctioning ignition coil can also prevent a chainsaw from idling properly.
In the event of any of these issues, a chainsaw will likely require the assistance of a professional repair technician to diagnose and resolve the issue.
Why does my chainsaw start but wont stay running?
The primary cause of a chainsaw that starts but won’t stay running is an issue with the fuel mixture. It may have not been mixed properly, or air may be entering the system through a loose part or worn gasket.
Additionally, the carburetor may need to be adjusted or replaced. Lastly, the ignition system may need to be serviced, as the spark plug or capacitor may be faulty.
In most cases, it’s best to take the chainsaw to a service center if you suspect there’s an issue with any of these components. The technician at the service center can inspect the chainsaw, diagnose the problem, and advise if any repairs or maintenance needs to be made.
Which way do I turn idle screw on chainsaw?
The idle screw on a chainsaw is typically located near the front of the saw near the carburetor. Turning the idle screw clockwise will cause the engine to turn faster, or increase the idle speed. Turning the idle screw counter-clockwise will cause the engine to turn slower, or decrease the idle speed.
Generally speaking, it is best to turn the idle screw in small increments and check the engine’s idle speed each time so you can ensure you get to the level of idle that works best for your particular chainsaw.
It is also important to ensure that the chain is not moving when the engine is idling, as an idle speed that is too high can cause the chain to move and potentially cause injury. Consult your chainsaw manufacturer’s manual for the recommended idle speed for your saw’s make and model.
Why does my chainsaw dies when I give it gas?
This could have a couple of different causes. One possible reason is that the ignition system isn’t working correctly, which could be caused by a faulty spark plug, an inadequate fuel/air mixture in the carburetor, or an insufficient spark.
If the chainsaw isn’t getting enough fuel or air, then it won’t be able to generate enough power to keep running. Another possible reason is that the choke is stuck open or closed, which can prevent the engine from getting enough air and fuel when trying to run.
Lastly, if the spark plug or fuel line are blocked or partially blocked, this can also impede the engine’s ability to draw in enough fuel and air. To determine the cause of the issue, you should start by inspecting the spark plug, fuel line, and choke to make sure everything is in good working order.
If all components are working correctly, then the next step would be to look at the service manual to adjust the fuel/air mixture in the carburetor.
How do you adjust H and L screws on a carburetor?
Adjusting the “H” and “L” screws on a carburetor can be a tricky process, but with some patience and a few simple tools it can be done. Before getting started, make sure you have a screwdriver, a pair of needle-nose pliers, and a vacuum gauge.
The “H” screw controls the amount of fuel going into the engine at higher RPMs and is often referred to as the high speed adjustment. Start by finding the idle adjustment screw and the mixture adjustment screw (smaller and larger screws respectively), which are usually located near the base of the carburetor.
The “H” screw should be in line with the idle adjustment screw. Adjusting the “H” screw requires several steps. First, use the vacuum gauge to find the ideal idle RPM for your engine, then adjust the idle adjustment screw until the engine is running at this RPM.
Next, slowly adjust the “H” screw in 1/8 turn increments until the engine runs smoothly across the entire RPM range.
The “L” screw is used to adjust the amount of fuel going into the engine at low RPMs and is often referred to as the low speed adjustment. This screw should also be in line with the idle adjustment screw and the mixture adjustment screw.
Again, use the vacuum gauge to find the ideal idle RPM, then adjust the idle adjustment screw to match the engine’s RPM. Once the right idle speed is attained, adjust the “L” screw in 1/8 turn increments until the engine runs smoothly across the entire RPM range.
Following the steps above should help you properly adjust the “H” and “L” screws on a carburetor, so that your engine can run at its optimal performance level.
What is the LA screw on a chainsaw?
The LA screw is a special type of screw found on some chainsaw models. It is used primarily to adjust and regulate the tension in the chain. It is located on the bottom of the chainsaw bar and often appears as a round knob with a star-shaped head.
The purpose of the LA screw is to help ensure that the chain is at the correct tension for a clean and accurate cut, reducing the chances of kickback, as well as increasing the overall life span of the saw.
To adjust the tension, the screw is rotated clockwise to tighten, and counter-clockwise to loosen. However, it’s important to know the correct settings for your individual saw, as too tight or too loose of tension can lead to damage or injury.
How do you clean a carburetor on a chainsaw without removing it?
Cleaning a carburetor on a chainsaw without removing it can be done by following these steps:
1. Prepare the carburetor and carburetor parts: Remove all debris from the carburetor and carburetor parts and blow out any dust or dirt. Inspect the carburetor for any signs of damage or contamination.
2. Clean the carburetor with carburetor cleaner: Saturate the saw’s carburetor, nozzle and other parts with a carburetor cleaner. Allow the cleaner to fully penetrate the carburetor and other components for a few minutes before rinsing off with steam or hot water.
3. Reassemble the carburetor: After the carburetor is clean and all components have been inspected, reassemble the carburetor with the appropriate gaskets and seals.
4. Test the chainsaw: Once the carburetor is back together, test the chainsaw to make sure it is working properly. If the chainsaw does not run efficiently, the carburetor will need to be removed and cleaned again.
How do you unclog a chainsaw carburetor?
Unclogging a chainsaw carburetor can be a challenging task, as the process varies depending on the make and model of the chainsaw. However, by following the below steps you should be well on your way to making any necessary adjustments:
• Start by removing the air filter from the chainsaw, and inspect it for blockage and debris. If debris is present, use a vacuum cleaner to carefully clean it off for the most effective results.
• Then you’ll need to disconnect the spark plug wire to prevent accidental startup as you work.
• Next, use a screwdriver to carefully remove the carburetor from the chainsaw and place it in a bowl of clean gasoline. This will help clean out any clogged passages, so that the fuel can pass through freely.
• After soaking the carburetor in the gasoline, use a small brush to further clean any clogged passages or hard-to-reach areas.
• Finally, carefully reassemble the chainsaw and reconnect the spark plug, and test to ensure the chainsaw is running smoothly. If there are any signs of clogging or other issues, it may be necessary to use a carburetor adjustment tool to make any necessary adjustments.
Why does my Stihl chainsaw keep shutting off?
There could be a few reasons why your Stihl chainsaw keeps shutting off. First, the fuel tank could be low on fuel, or you may need to add fresh gas and oil. Second, the air filter may be clogged and unable to supply enough air for the engine to run.
Third, the spark plug could be fouled and not generating a spark. Fourth, the carburetor may require cleaning or adjustment, either because of dirt and debris or because the fuel and air mixture is incorrect.
Finally, the ignition timing may be off, meaning the spark is being delivered at the wrong time, causing the engine to shut off.
Why does my chainsaw only run with the choke on?
Your chainsaw will only run with the choke on when the engine is cold. This is due to a phenomenon known as “cold starting,” which involves using the choke to adjust the amount of air entering the engine to make the fuel-air mixture leaner and easier to ignite.
Without the choke, the mixture may be too rich for the engine to ignite. Additionally, when the engine is cold, the combustion process takes longer and requires more time to build up the necessary heat and pressure to ignite the fuel.
The choke is used to help this process go more quickly by allowing more air into the engine, reducing the amount of fuel in the mixture and allowing it to ignite more easily. Once the engine is warmed up, you can disengage the choke and your chainsaw should run normally.
Why is my chain not moving on my chainsaw?
The most likely reason why the chain is not moving on your chainsaw is because it hasn’t been properly lubricated. The chain and bar on a chainsaw requires regular lubrication to ensure it moves as efficiently as possible.
If the chain has not been properly lubricated, it won’t move correctly and may jam up, causing it to not move at all. In addition, if the chain has become dull, it may need to be sharpened or replaced before it moves correctly again.
Other possible causes can include buildup of debris on the guide bar, an obstruction preventing the chain from moving freely, or a loose chain that has become disconnected from the sprocket system. If those causes have been ruled out, then it’s likely inadequate lubrication causing the chain to not move.
Should chainsaw chain be on when starting brake?
No, the chainsaw’s chain should not be on when starting the brake. Turning the brakes on while the chainsaw’s chain is running can be dangerous, as the force of the engine being pulled can cause the chainsaw to jump off the ground or kick back into you.
The resulting injuries can be severe or even life-threatening. For this reason, it is important to always ensure that the chain of a chainsaw is not running while starting the brakes. Before turning on the brakes, make sure the chain is stopped, and then carefully turn the brakes on before starting the chainsaw.
How do you know if your chainsaw sprocket is worn out?
One of the main indicators is if you notice your chain slipping off the bar as you’re cutting. That typically means the sprocket teeth have been worn down and are not gripping the chain properly. Excessive vibrations from the chainsaw may also be a sign of a worn out sprocket.
If the chain does not move quickly and smoothly, it may indicate that the sprocket teeth are worn and need to be replaced. Another easy way to tell is to visually inspect the sprocket. If you notice cracks in the teeth, or the teeth are noticeably worn down and dull, it’s likely time to replace it.
You can also check the inner diameter of the sprocket. If it is significantly larger or smaller than it was originally, the sprocket should probably be replaced.
Should the chain on a chainsaw be tight or loose?
When adjusting a chain on a chainsaw, the chain should be tight enough to prevent it from moving on the bar, but loose enough for it to be able to move without too much tension. If the chain is too tight, it can cause damage to the bar and the chain, and it may also cause the saw to vibrate excessively.
If the chain is warped or worn, it can cause an uneven cut. Conversely, if the chain is too loose, it can jump off the bar during operation and cause severe injury. If necessary, use a chain tensioner to get the exact tension needed on the chain.
When tightening the chain, it is important to make all the adjustments evenly and ensure that the tension remains consistent throughout the cutting session.
How do I know if my chainsaw chain is tight enough?
A properly tightened chainsaw chain is essential for the chainsaw to run efficiently and safely. The best way to know if your chainsaw chain is tight enough is to perform a tension test. To do this, first make sure the chainsaw is off and the chain has stopped spinning.
Then, place the tip of the chainsaw bar against a solid, flat surface and press down with reasonable force. The chain should not move more than 1/8 of an inch up or down. If it does, the chain needs to be tightened.
To complete the tension test, press up on the top of the guide bar at the back end, away from you. If the chain moves more than 1/8 of an inch, it needs to be tightened.
When tightening the chain, use the tensioning screw located on the side of the chainsaw. It should turn easily, but not so much that the chain is loose. Make sure the chain is neither too tight nor too loose.
Too tight of a chain can cause strain on the engine and cause the chain to break, while too loose of a chain can slip off the bar, leading to hazards. After adjusting the chain tension, re-test the tension of the chain by performing the tension test outlined above.
If the chain still does not meet the tension criteria, repeat the adjustment process until it does.
Can you over tighten a chainsaw chain?
Yes, you can over-tighten a chainsaw chain. If the chain is too tight, it will cause extra strain on the motor, making the chainsaw more difficult to start and operate. Additionally, an overly tight chain can cause premature wear on the sprocket and guide bar.
To avoid this, always adjust the chain tensioner to the proper setting according to your model’s specifications. If the chain is too loose, it will cause it to rigidly thrash around which can cause hazards and make it difficult to use.
To ensure the chainsaw chain is properly tensioned, start the engine and then carefully pull upwards on the chain. If there is significant play, the chain is too loose and should be tightened. To prevent over-tightening, you should follow the manufacturer’s guidelines.
When you are done, test the chain tension again as it can move as you use it.
How tight should a chainsaw chain be Stihl?
The correct tension for a Chainsaw chain Stihl should be enough to hold the chain around the bar without it sagging or coming off, yet not so tight that the chain rides in the grooves of the bar tightly or doesn’t turn freely.
That’s why it is important to have a good quality adjusting tool when adjusting the chain. Keep in mind that when you start a chainsaw engine, the chain will loosen. Therefore, you may need to adjust the chain tension after each use.
A good rule of thumb is if the chain can be moved along the entire length of the bar with light pressure from your finger, it’s correctly tensioned for use. If the chain is too loose, it will creep over the teeth of the bar and become damaged or cause injury.
Too tight, and the chainsaw might put undue strain on the motor while running and create premature motor wear.
