Fuel Line and Fuel Filter might be blocked or damaged – If the Fuel Line and Fuel Filter is damaged, split or blocked, the chainsaw will not get enough fuel. For a fast and easy start of the chainsaw, try to use fresh fuel. A dry chain will need a lot more power to do its job. Cutters of the chainsaw dig too far in the wood or can take only very thin slices. You'll probably also find excess deposits on the spark arrestor. It’s relatively easy to flood your engine. A dirty air filter -- which filters air coming through the intake port -- or spark arrestor -- which filters the exhaust -- impedes air circulation and kills the engine. Then, even if you do a perfect job tightening it, you’ll probably have to tighten it again after running the chainsaw awhile. If you are not sure about the age of the fuel, empty the gas tank and refill with new gas. A Problem With the Air Supply System Air supply is as crucial as fuel supply in any internal combustion engine. But after you look at the array of problems below, pick the right one and work down the list of possible causes, you will. You will find them on the right side of the engine... Fuel. If the problem persists, move on to the last and complex step of the troubleshooting. jon this is rich's son. A clogged air filter causes the saw to draw too much gas as compared to the amount of air. Problems with how the chain cuts can usually be associated with the quality of the sharpening. A petrol powered chainsaw has several moving parts. If the engine dies while idling, the idle adjustment needs to be tightened. 2 1/4 on the high. There are several reasons why your chainsaw won’t start. When gasoline is left standing in the fuel lines and carburetor, it partially evaporates, leaving behind a varnish-like substance that clogs the fuel system. There might not be enough Gas – If you haven’t used it for quite some time, the gas may have evaporated. Poulan PLN1514 vs STIHL MSE 170 C-BQ vs Homelite 14 in. What Causes a Stihl Weed Trimmer to Smoke? Things might be a little more complicated if the problem is related to fuel delivery or to the composition of the fuel itself. Check the sprocket for wear and to be sure it's the correct size. currently speaking, i have the carb adjusted to 1 3/8 on the low. A dirty fuel filter restricts fuel flow, which also kills the engine. You do not want your work to be halted by an unprecedented chainsaw breakdown. This blog post will show you the steps to fix the choke issue. If the plug is excessively coated with carbon deposits, it's a sign that the fuel mixture in the combustion chamber is too rich. L Screw - With the chainsaw still running, take a screwdriver and turn the L screw clockwise. When you have trouble starting your chainsaw, try these steps before you start tearing the chainsaw apart. Running a lean mixture for too long will cause irreversible damage to the internals of the engine. If your chainsaw isn't running well, a dirty carburetor could be the problem. This is probably the most common reason that a chainsaw will start tight, and then get loose. Dip the filter in gas and see if it will freely run through the other side. It can be as simple a solution as that. Spark Plug might be old – If the spark plugs are dirty or corroded, clean it with a steel brush or replace it altogether. When you encounter a problem with your saw that seems dead, it is good to start at the beginning and check a few basic things before you assume the worst and buy a new one. In order to do that, warm up the chainsaw's engine, and then, with the engine running, turn the low-speed carburetor screw clockwise one-quarter turn or less. Give it a good cleaning to remove any clogging or blockage. A typical chainsaw, the answer is No, restart is the same but maybe there is a difference because of the Autotune. A saw sucks air and gas according to how the carb is set up. See our DIY chainsaw repair page for symptoms and step-by-step repair instructions. If it doesn’t, replace it. This is when too much fuel is … (Whoops) Check the power cord to ensure it’s connected to both the saw and the outlet. A carburetor kit will helps with this. If your chainsaw is not starting when you pull the starter rope, and you’ve checked the above, there may be a problem with the compression. Remember the position. If you find that it’s sticky, buy a rebuild kit or replace it. Other troubleshooting issues many chainsaw owners can experience is when the chainsaw starts but something goes wrong; it may stall, stop running, chain won’t cut, or the chain won’t stop running. Start well and works perfectly, but after 10 minutes stop! To fix the problem you should check and clean the fuel system and carburator. perhaps too much oil in the fuel. Things like cleaning the air filter, putting fresh gas in the saw, remembering to add bar and chain oil when you fuel up, and running a file over your chain every tankful of gas or two. High-Low adjustments screws may need calibrating – If you have these screws in your chainsaw, adjust them by turning both screws clockwise until you reach the end – gently. Thorough comparison of cordless and electric chainsaws, Useful spring maintenance tips for chainsaws, Solutions to typical problems with chainsaws for novice loggers, How we test? dad and I were wondering if it might be the oil/gas mixed incorrectly. Learn how to put a chain back on a chainsaw so that you can troubleshoot yourself.. he turned that chainsaw over to me. Sometimes it … If your chainsaw has been in storage, the fuel may need to be replaced. The cause of the scored piston and cylinder was two-fold: incorrect oil/gas ratio, as well as the saw being set to run too lean. A dull chain will stress out the motor and can lead to overheating and a dead engine. You should maintain servicing the chainsaw every time after using it for 25 hours. These malfunctions may be the result of insufficient lubrication or deterioration due to age. Turn the screw clockwise until the chainsaw misbehaves again. 9 A. which electric chainsaw is the best? But keep in mind that some proper maintenance can prevent a stressed motor or battery. Worn crankcase seals and malfunctions of moving parts inside the engine itself can cause stalling. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. Chains can also overheat and scratch the wood. An important part of diagnosis of engine stalling is to remove and examine the spark plug. If it doesn’t, replace it. seems out of gas after it difficult to start again, but after a start is always to want to stop, but accelerated in depth does not stop !! Chain does not oil. ... Chainsaw running rough. The problem could be a lack of air or a misfiring spark plug, and both of these problems are easy to check and remedy. ! Here are some additional things to check and try if you experience these problems: Check for Clogged Spark Arrestor Adjust the screw halfway between these two positions. If you buy a Chinese chainsaw on the internet, you have no way to verify its quality, generally, are left without a warranty and have little recourse to repair the machine if it breaks. Clean the filter or buy a new one. Connect with us on the following social media platforms. 32cc gasoline chainsaw with Prosumer Top Handle, Universal and reliable GreenWorks 20312 cordless chainsaw, Light and compact Echo CS-330T gasoline chainsaw, Light and professional STIHL MS 192 T gasoline chainsaw. When your chainsaw only runs if the choke is on the problem, in most cases, is a result of fuel supply problems or a faulty carburetor. Diaphragm might be sticky from old gas – The diaphragm goes bad over time. You may have to remove the carburetor, disassemble it, clean each part with carburetor cleaner and rebuild it. Chain oil travels from the tank via a tube, then runs into the guide bar and the … En español Live Chat online. Additional refilling can also help to solve this unpleasant problem. Your Account. Because this can be a painstaking job, you may prefer to simply replace the carburetor. If you fail to improve performance by replacing filters or adjusting the carburetor. The problem is not so much in buying a Chinese-made chainsaw; the issue is purchasing any machine sight unseen. Right now, you don't know. Idle ports may be plugged or blocked – This is the small ports in the carburetor where the fuel passes through when in idle. Make sure that the chain is at the correct tension and well lubricated. The fuel filter is usually in the gas tank and easily removable and replaceable. This repair guide takes you through the process. The ethanol-water mixture clogs the fuel system. What to do if your chainsaw won’t stay running? This is particularly common when you store your chainsaw in cool temperatures. It's like leaving the choke partially on. Find the most common problems that can cause a Stihl Chainsaw not to work - and the parts & instructions to fix them. When you’re using your chainsaw, as the chain heats up, it will literally get larger. could this be the problem? Check the cap and clean it or replace. Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. A bad fuel line will cause the chainsaw to run lean (too little fuel or too much air in the mixture), and this means it will only run at idle for 5 to 10 seconds before it shuts off completely. the saw will run and idle. A chainsaw has two filters to regulate air circulation and one to keep debris out of the fuel, and... Fuel Issues. Stihl Chainsaw Will Not Stay Running Air Filter and Spark Plug. Do not force or damage! Is the extension cord plugged in? Anyhow when I have some time I have a Infrared temperature detector, and also a thermocouple and tachometer, so I will connect them up to my Model 545 and run some different tests to see what happens. A chainsaw has two filters to regulate air circulation and one to keep debris out of the fuel, and all of them need regular servicing. If it still isn’t working, it could be a problem with the coil. Rev the engine and check for … Ultimately the problem was due to low compression. Confirm whether the spark plug is in good condition if you are having trouble starting the chainsaw. The more you use a chainsaw, the quality of the fuel gets worse with time. If your chainsaw stalls instead of producing the reassuringly high-pitched sound of a healthy engine when you press the throttle trigger, something is interfering with efficient fuel combustion. Make sure the gas tank is at least half full. When you are unable to solve this lean operation problem on your own by following the aforementioned steps, you should seek an expert and repair your chainsaw. You can take it apart, clean it and rebuild it, using a carburetor rebuild kit. A chainsaw will develop challenges here and there, especially when it gets old. however, once i get to full throttle it dies after a few moments. Carburetor. See if the engine is flooded. When metal gets warmer, it expands. This is partly attributed to clogged filters because of long working hours, and less air … The carburetor plays the ultimate role to run your chainsaw engine. Bring the saw to full throttle. You can determine this from the vibration. 1-800-269-2609 24/7. Care f… Fuel is only good for 8 weeks from the day you purchased it. If that doesn't get the saw running smoothly, it's probably time to bring it in for servicing. Chainsaws, just like any other power tool are vulnerable to breakdowns every now and then. Starting with the High Speed screw, turn it up counter clockwise until the chainsaw starts sounding rough and bucking. Dip the filter in gas and see if it will freely run through the other side. If the engine doesn't stall until you depress the throttle, tighten either the low-or high-speed adjustment screw to improve performance. The gas might be old – If unused for a long time, the volatile components of the gas will evaporate and it will not ignite. We will tell you how to figure out why your chainsaw is doing what it's doing, and have the right replacement part waiting. The air filter is under a cover on the engine housing, and the spark arrestor is between the exhaust port and the muffler. Turn the knob on the carburetor box cover 1/4 turn counterclockwise and remove the cover. Conclusion. Neglect of the air filter has to be the number 1 reason for running problems. You can use an ignition coil tester to determine if it is broken or not however it may be worth consulting a professional at this point as if it is defective you will need to replace it. For the Low Speed screw, repeat the procedure in idle. Vent in the Fuel Cap is plugged – If the vents in the fuel caps are clogged the fuel becomes vacuum locked. As you have checked both the fuel and air filter, it is time to give a functional test run of your chainsaw. If it still won't start, clean your spark plug and clean the air filter. Usage of good oil solves this problem. © Copyright 2020 Hearst Communications, Inc. Eternal Husqvarna vs. STIHL chainsaws fight, Unbiased comparison of Echo CS-330T and STIHL MS 192 T gasoline chainsaws. As a landscape builder, he helped establish two gardening companies. Incorrect Idle Speed. If your chainsaw has been in storage, the fuel may need to be replaced. When you remove the old fuel, you should disassemble the fuel lines and spray them with carburetor cleaner to dissolve deposits. A misaligned, worn, or wrong-pitch sprocket will also cause the chain to wear or dull quickly. If you’ve checked all the possible problems and corrected them and your chainsaw still won’t stay running – it might be time to bring it to the service center for a carburetor check-up. Also, be sure to use a sharp chain. I'm here with a problem with my chainsaw husqvarna 440 e-series! Unbiased Research Methodology, Light and compact Oregon CS250-A6 cordless chainsaw, General tips about gasoline chainsaw tune-up, Semi-professional and reliable McCulloch CS 400T gasoline chainsaw, Choosing the best gasoline chainsaws for novices, STIHL MS 192 T vs. Husqvarna T435 gasoline chainsaws – competition of power and size, Homeowners like Craftsman 40V cordless chainsaw, Light and powerful Husqvarna T435 gasoline chainsaw with top handle, Just good and average STIHL MS 362 C-MQ gasoline chainsaw, Review of reliable Echo CS-303T gasoline chainsaw, Extremely heavy and powerful STIHL MS 880 Magnum gasoline chainsaw, Hitachi (14?) 6 possible causes and potential solutions . Locate the carburetor adjustment screws. If your chainsaw is running in lean condition and you continue operating, it can cause your piston and cylinder failure. L Screw - With the chainsaw still running, take a screwdriver and turn the L screw clockwise. Next, begin to slowly turn the adjustment screw counterclockwise until you hear the engine idling smoothly. It’s better to carry the instrument not too low and you won’t face this problem. These saws run great on a lean setting, however, it is risky because of the likelihood of this problem. Any internal or external factor leading to less supply of combustible air results in bogging down. Start by checking the basics such as Fuel, Switches and Spark Plugs and making adjustments. … The fuel may also have moisture in it, and the moisture mixes with ethanol in the gasoline and settles at the bottom of the tank, which is where the fuel line is located. This can be especially troublesome in very hot or very cold climates, wher… Fuel Line and Fuel Filter might be blocked or damaged – If the Fuel Line and Fuel Filter is damaged, split or blocked, the chainsaw will not get enough fuel. Issues with the carburetor can also cause problems with the chainsaw. This one comes down to physics. Good evening everyone. If that doesn’t resolve the problem, the issue may lie with the carburetor – which may require a visit to the repair shop. Checking for Compression Problems. Both are easy to remove and service. Free repair advice! Adjusting the Carburetor. Keep turning it until the engine almost stops turning. Diaphragm might be sticky from old gas – The diaphragm goes bad over time. My String Trimmer Continues to Spin During Idle, My String Trimmer Starts, But Won't Stay Running, Chainsawr: Adjustment and Tuning of a Chainsaw Carburetor, My Stihl Weed Trimmer Is Dying at Full Throttle. Clogged Air Filter – Put the air filter up against a bright light and check if there are dark areas deep in the filter. Try to use or at least run your chainsaw on a regular basis just to keep all its parts active. On many chainsaw models, you can control the amount of fuel that the carburetor sprays into the combustion chamber by turning one of its adjustment screws. Faulty Carb Kit. 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