Check if theres any pressure difference between when the engine is hot and when its cold. !. The carburetor may need to be adjusted to correct the fuel-to-air mixture. Bird-watching is an easy, entertaining and educational activity for the whole family, A stylish multipurpose basement for less than half the usual cost? :)) xoxo eva @ MONARCHSOFAS.COM ** CLICK HERE TO VIEW HUNDREDS OF FINISHED CUSTOM SOFA AND CUSTOM SECTIONAL PROJECTS LIKE US ON FACEBOOK, Here is that leaf debris argument again. There are also many other possibilities but the saw if of current generation is probably not worth the time, money and effort. However the problem sounds like Fuel starvation.Suggest you check the following. The saw is like new and ran perfect last time I used it. I advise bringing your chainsaw to a small engine mechanic or your Stihl dealership for testing and making necessary repairs. If you buy something through our posts, we may get a small commission. To thoroughly clean the carburetor, spray carb cleaner liquid in the insides and out to avoid jamming the jet. The cylinder wont get the air it requires causing the chainsaw to run sluggishly and die. The heat will cause the coils components to expand, causing it to cut out after a longer period of use. Spray carburetor cleaner into the line to loosen the clog. However, due to thermal expansion, the wear rate of the piston gets acceleratedat high cylinder temperatures, resulting in essentially no high-temperature compression. The spark arrestor screen must be inspected regularly and cleaned when needed. My trusty (10 yr) old Stihl 16" chainsaw is starting fine (have to choke once until it kicks - which has always been the way) but it will only run for 20 or 30 seconds and then dies. Super OPE Member. "Love the flexibility of the app to add everything in the home and garage. Can you move it by hand, with gloves? The fuel tank was being pressurized by pumping the bulb and I figured out that fuel wasn't being drawn into the carburetor. Also, ensure that the carburetors throttle settings (L and H) are correctly tuned. This is also the key to prevent piston failure. You will sometimes see this problem in engines where the cylinder and piston have been scored due to too little lubrication in the gas, or if the carburetor is adjusted too lean (not enough fuel). Check that the choke is operating properly. Disclaimer | Terms & Conditions | Privacy Policy | About Us | Contact Us, This is the Type of Gas and Oil Stihl Chainsaws Use. The consent submitted will only be used for data processing originating from this website. However, a damaged air filter should be replaced. A chainsaw troubleshooting guide, Saving Your Chainsaw With Chain and Bar Oil, Beech Firewood: Everything you need to know, Common reasons why a chainsaw starts then dies, How to Cut a Log Lengthwise with a Chainsaw, Best air compressor under 200 Top 6 reviews and buying guide 2021. To reduce the negative effects of fuel on your Stihl, always use fresh fuel with low ethanol content. +1-213-221-0119, By using this website I agree with the Disclaimer. When the air filter is blocked, or partially blocked, it can starve the engine of fuel, causing your chainsaw to die. Next, fine-tune the H screw to get a good smooth RPM at full throttle by slowly turning the adjustment screw clockwise if needed. Crape Myrtle stops growing after spring. Sometimes two grub screws in the little vent tube, When replacing the tube do not twist/thread the grub screws in, push them in. If the spark arrestor is clogged, the chainsaw may run stall or run rough. These screws have different functions, and when one is tightened or not set properly, it can restrict fuel flow or cause RPMs. In addition, you will find links to more detailed information on each issue. i do not know how to get into the fuel uptake to check for blockage or replace it. Check your electrode for signs of wear and strain. Doing so will put the engine at risk of permanent damage. After that, closeit down and start your chainsaw. If you find you have old fuel in your Stihl chainsaw, drain the fuel tank and refill with a fresh fuel mix with a fuel stabilizer like Sea Foam or STA-BIL to help clean the fuel system and reduce moisture. Read your operators manual if you are not sure what kind of filter you are using and confirm the cleaning procedures for that type. Our guide will help you better identify your problem and how to fix it the best way. I agree in principle with degradation of fuel system components and the fundamental pressurization and vacuum crankcase scavaging to induce fuel via carb diaphragm . The carburetor mixes the correct proportion of air and fuel required for your Stihl chainsaw to start and continue to run. Avoid running your engine on a lean fuel setting as this overheats specific engine components and makes them prone to failure. A dirty air filter -- which filters air coming through the . Pull the filter out of the tank using a filter hook or a clean bent wire. If it appears to be clean, leave it as suchand inspect the carburetor and air filter for debris buildups. possibly yours does also. Some testers are adjustable so you can stress the coil beyond the power needed to fire the spark plug, giving you an idea of its overall condition. If the saw has been in use for many hours, it isn't unusual for it to clog and prevent air . Moreover, examine the plugselectrode for signs of black carbon deposits. Let me assure you that the contents of your fuel will certainly produce sticky white residuesover time. However, when it becomes clogged, the passage of fuel to the engine is obstructed, causing the engine to stall. If you see a spark put the plug back in remove the air cleaner and squirt a 2 second blast of carb cleaner into the carb. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. Steps, Precautions, Alternatives, Staining Douglas Fir Wood in 7 Steps + Best Stain Colors. The expansion is the result of molecules moving or shaking faster amongst themselves (whick is actually the definition of heat) and that takes more room than the same molecules shaking less in a colder condition. Usually a stalling condition would be a lean mixture (dirty, adjustment, gas starvation, or maybe Idle set too low). Is this indicative of a good coil or should there be a strong blue spark? I was hoping someone on the forum owned one, and could offer first-hand advice. Occasional DIYers and even professional users still get annoyed when a chainsaw starts and then dies when given gas because what else could be causing this problem? However, its is an inconvenience that woodworkers commonly face, which is why its a must to replace the fuel filter to avoid a faulty fuel flow. Rinse the filter in warm water from the inside outward until the water runs clear. Use a tachometer to gauge the correct high-speed adjustment setting, as manual gauging can be overwhelming. This will help find the best solution strategy to fix your issue. Pull cord Its the chainsaws startup mechanism. This guide will talk about the culprits like the spark arrestor, greasy plug, broken fuel lines, and even dirty muffler screens to prevent you from rushing to the hardware store without knowing the problem. Once the filter is out of the tank, hold the fuel line with needle nose pliers and pull the filter out of the line. Looks like you are making a good start. Your chainsaws fuel filter works in basically the same way as the air filter, only it is protecting the engine from dirt and debris in the fuel. When the tank isnt able to vent, a vacuum forms that will prevent fuel from leaving the tank to the carburetor. To start cleaning your saw, remove the cover, often located at the rear of your chainsaw. Install a new one if itsquality has worsened. Replace your spark plug if the electrode appears worn out. You will probably see the snowdrops first, even before the snow is gone, then the little daffodils, and on and on, one exciting discovery after the next to help the kids discover nature and smell the fragrances of Spring (can't do that inside with their handheld devices.) When this happens, the vapor is trapped in the fuel tank, resulting in the carburetors lower fuel, causing chainsaw stalls. It covers problems with a chainsaw not starting, bogging down, or dying. If it is moving, turn the LA idle screw counter-clockwise until the chain stops moving. Why does my chainsaw start and dies? If your chainsaw dies after it's been running awhile and won't start again until you allow air to enter the fuel tank, you may have a fuel tank vent problem. I also removed the fuel filter and tried rinning it without the filter. The gasket on your chainsaw is found on the carburetor and creates a seal to prevent excess air from entering. 2) bad plug. I had numerous problems with it all fuel related.Really it was a matter of tuning the carby but Electrolux refused to sell me the tool to do so, so I made my own and then found they were available as an aftermarket item. To do this, first, remove the spark plug and wait for the engine to cool. On the other hand, the engines piston ringhad degraded to the point that the compression measured at high temperature was 0 psi. Check the manual provided by your owner for more specific repair information related to your model. No venty. We changed it to 32 to 1, and most of this overheating issues were gone. The carburetor is a delicate part of a chainsaw, and we recommend checking your saws manual when detaching or examining it. I then have to wait till it cools down to restart. Clean the screen with a metal brush. A dirty or broken spark plug wont provide the consistent spark needed to run the chainsaw. Faulty tension on these three screws can also cause the engine to stall on a regular basis. Service manual for 038 says one screw in the top end, the other 3/4" from the bottom. Wrapped our island in board and batten and painted it functional gray. Hence, always inspect the filters and make sure they arent plugged with any debris. Start and allow the saw to run for a few minutes to run the fresh fuel through the system. stop with vapor lock in the fuel line.Test: Loosen gas cap and retighten, then restart.Clogged fuel line or filter:Test: clean or replace filter and lines.Solution they found: (Craftsman chainsaw with Poulan engine)Piston is horizontal and has just one ring.Test: compression before cold start then again after hot stall.Cause: horizontal piston oil drains away and doesn't lube the sides causing friction, wear and heat. Also, open your fuel cap for some time and allow the pressure to equalize. I already checked the fuel filter and gave it fresh fuel. Check for this problem the next time your saw dies when it's hot. If your saw dies at idle, turn the idle screw clockwise until the chain just starts to move. Fuel tank It is the location of the devices fuel and oil mixture. One day started surging when hot and then would shut down. The passageways can become clogged and the small components can fail to function correctly which can be the reason the chainsaw stops running. Again, this may be different for your model Stihl saw. Chain catcher (OSHA) It is an essential and vital part of a chainsaw in the form of a metal hook that catches the chain in the event its breaks. Sounds like a case vacuum leaking down or a case pressure leaking down. When this happens, its best to get a new spark plug instead. Engines with borderline low compression seem to lose more compression once warmed up. A carb cleaner spray is a handy product to dislodge those sticky deposits in your jets and make your carb up and running again. Again it may not be the problem but one possibility. The mixture was leaner, resulting in overheating. If not, can some recommend a different brand mini-chainsaw? Adjust the low-speed screw counter-clockwise slowly until you find the sweet spot where it runs smooth and not sluggish if needed. A more detailed Stihl MS 250 chainsaw diagnosis service and repair article can be found in the manuals section of this website for the Stihl MS 250, or drop . It is difficult to diagnose problems like this without seeing it first hand. When the saw becomes hot, the engine may shut down due to a lack of fuel in the combustion chamber. Good point from mla2ofus. 79Fiesta. This pattern continues to repeat itself even after the saw is well warmed up. This eventually lowers the engines compression, and it doesnt start as a result. Should cost about $25. Check for any gaps that could be the culprit to ignition and fuel issues. Allow the filter to completely air dry. The chain and bar might expand at different rates and sizes. Check the carburetors jets and make sure that they are kept clean and free of debris. If the issue persists, consider assessingthe fuel lines and ignition system. Fix your Lawnmower with our Lawnmower Troubleshooting tool. Begin by removing the spark plug wire. Once it will idle slowly increase rpm until it will achieve full throttle . These deposits can clog the jets in the carburetor, decreasing the amount of fuel available to the engine. Take the bowl and bowl nut out of the carburetor. Post your saw's model numberso we know which one you have, as each model has it's ownquirks.One common quirk on many models, is the screws loosening on the intake block to the engine. Fuel filter maintenance and replacement should be a regular job. I have a Husky 51 that had same problem. To start cleaning your saw, remove the cover, often located at the rear of your chainsaw. Gauge and tighten correctly to make sure its the right hold. Then turn the screw counter-clockwise 1/4 turn. Ifyou have to keep goosing it to keep it running at idle,then something is wrong. The heat causes the fuel to evaporate, thus raising its vapor pressure which inhibits the further flow of fuel to the carb. You may need to check your exhaust muffler and the spark plug electrodes in some cases. You are using an out of date browser. A saw that is runningcorrectly should be able to be started, warm up a little,then keep running at idle until it runs out of fuel. But, it's alway good to know where the carb. You must log in or register to reply here. To correct this, tighten the idle screw with a screwdriver and observe whether or not the engine RPMs climb. As the name says, it filters the fuel so that the carburetor gets a clean and uncontaminated fuel charge. Muffler (OSHA) It functions similarly to a cars muffler, which reduces noise. Does anyone know how to fix this? Sawinery is a one-stop source for anything woodworking-related. Do not rely on neon spark testers, they will lie to you. If you haven't already install another correct type spark plug. My Chainsaw Starts When Cold but Not Restart When Hot? No improvement. Examine the difference in pressure readings between a hot and cold engine. Use quality line made for fuel if OEM is not handy/available. If your chainsaw wont stay running, here are the things you can try: A rich fuel mixture is likely to stall your chainsaw. Clean the vent hole within the fuel cap will save you the need to remove the cap every 5-10 minutes lol . The fuel tank on a Stihl chainsaw must be able to vent to allow air to pass. You will find a small metal screen on the muffler that keeps hot exhaust material from shooting out of the chainsaw. Choke is the little spring loaded flap inside of air filter. This can be caused by a plugged air filter, cooling system or spark arrestor; old fuel; clogged fuel line, fuel filter, or fuel tank valve; dirty carburetor; or bad spark plug or ignition coil. you should see a pretty blue spark??? Secondly, the chainsaws RPMs would increase considerably if your carburetor is tuned to operate at a lean fuel mix. Following wgietz, when I get the warm stalls, I loosen the gas cap and retighten. It would equalize after sitting for a while and run good again later. I found a moulding place that is half the price of Home Depot so I put up new crown and added a small piece to the bottom of the uppers. Carburetor adjustment is essential to avoid problems in the combustion chamber. thanks. Clean around the air filter to remove any dirt and sawdust. Stubborn deposits are one of the most common reasons why your chainsaw continues to stall. I'm having a similar problem with a Poulan model PP4218AVHD. The most common problem causing your chainsaw to run slow or die out is a vapor lock in the fuel lines. Running old gas can be a big culprit, but many other items can cause a Stihl to die. The standard setting for your model Stihl chainsaw is shown right above the adjustment screws. Unscrew the gas cap, vent the gasses and try to restart your saw. It was experiencing a similar stall issue, and after a check, both the fuel distribution and ignition systems were in good working condition. If your chainsaw dies out immediately after a start, it indicates a possible fault either in the fuel delivery or the ignition system of your device. #1. Make sure the fuel is made up of gasoline and oil mixed at a ratio of 50:1. I would love quartz but the price tag is just too much right now. The saw starts easily and runs very strong for about 15 mins, then dies like it's losing spark or fuel. Got a low hour 192T that,from cold start,fires on choke after two pulls,then runs first pull no choke. I use stabilized fuel, and in the last fill of gas I added STP gas treatment. Then turn each screw counter-clockwise with the number of turns indicated above the screw. Inspect the ignition module with a tester. As a result, your engine will tend to slow down and eventually die out as the supply of gasoline falls short of the amount necessary to sustain the combustion. Yeah. Stihl does have some limits to the adjustments you can perform to the carburetor. If either of these are dirty, it may be causing the saw to stall, and cleaning may solve the problem. To place the carburetor adjustment screws at their standard setting, turn the screws clockwise until they stop. What the pros say, Chainsaw Over-Revving: Tips from a Professional. Still runs great for 15 minutes, then dies. From what I read, this is a common problem. On and of switch plus choke Its all managed by one lever. Make sure the spark plug gap is correct and the spark plug wire is securely attached. These are throw aways after a very limited time in use. The atmospheric pressure and the fuel tank pressure should be the same. Check vent. Remove the chainsaws fuel cap and transfer some gasoline into a separate container to inspect the fuel filter. was adjusted just in case turning the Hi and Low screws does nothing. 453 S Spring St Ste 400 Due to poor fuel quality, deposits build up on the fuel filter housed within the fuel tank. Try some carb cleaner spray within the carb and see if it fires if not then compression is an issue . It should fire immediately off the carb. Ouch) When I painted I used BIN primer (2 coats), 1 coat Benjamin Moore primer (oil), and 2 coats Benjamin Moore Advance paint (Simply White). Together we put a lot of effort into the maintenance of our gardens over the last few years, we become obsessed with it. Grubs/vent are easy to fix. Do a cold compression test and another when the saw quits. Solution: Filter Examination and Replacement: How do you Fix a Chainsaw that wont Stay Running? The coil provides the electrical current to the spark plug to form a spark that ignites the fuel to start and keep your chainsaw running. Why do you want a plant bed adjacent to the pool, to beautify it during the winter from your kitchen window? You can try to clean the spark plug with a wire brush and reuse it if its just a little dirty. Good luck. How old is it? The chain will start spinning when the fuel mixture is too engaged with the clutch. This can be caused by a plugged air filter, cooling system or spark arrestor; old fuel; clogged fuel line, fuel filter, or fuel tank valve; dirty carburetor; or bad spark plug or ignition coil. So what I did was loosen the gas cap and retighten it. Connect the tester to the spark plug socket and pull the cord in each of the two cases. Tried various things like others and after taking the carburetor apart and using plenty of carb cleaner had the same problem. it has the above described problem. Starts,then dies straightaway,then wont start. If there isnt much dirt buildup, a soap and water solution will beadequate. Check the filters quality. Engine Gas-powered chainsaws are still regarded as the standard. Nearly every weekend you will find us doing small or big jobs or just enjoying our garden. Use a screwdriver to detach the cover at the back of your saw. I agree with removing the cutback fruiting tree. Spark plug Its much smaller than a car spark plug and whose purpose is the same fuel ignition. Bar Its the central piece that the chain circles around. Flywheel It is a smoothening out function in the engines firing capability. Click to reveal Air filter It aids in getting the correct fuel-to-air mixture that goes into the engine. It died last week cutting some wood. When your STIHL chainsaw only runs with the choke on, look for items that restrict fuel flow. Why wont my Chainsaw Start when its Hot? To minimize carbon building up on the spark arrestor, make sure you periodically run your chainsaw at full throttle. Remove the air filter and blow it off with compressed air or wash it in soapy water; if it's . Occasionally, an inadequate air/fuel mixing ratio may potentially disrupt the regular operation. Sprinkle a carburetor cleaner. Purchases made through these links may provide a commission for us, at no extra cost to you. Register today and take advantage of membership benefits. 4) bad fuel breather. Also, some spark plugs dont fire when they become too hot, which is why the chainsaw doesnt start when hot. i have a stihl 290 model. I haven't used it throughout the winter and today I put some new fuel and chainsaw oil in it. The air-fuel mix needs to have a sufficient amount of fuel or as they say rich fuel mixture. A simple way to test the ignition coil is to do a "heat soak test". Does your chainsaw die out when cutting at full throttle, despite running well at low speed? Of this overheating issues were gone vapor pressure which inhibits the further flow of available. 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Hole within the carb isnt much dirt buildup, a damaged air filter to remove any dirt sawdust! Sounds like fuel starvation.Suggest you check the following you want a plant bed adjacent the. Filter for debris buildups run your chainsaw check your exhaust muffler and small... Compression test and another when the fuel lines probably not worth the time, money and effort shown. Cap will save you the need to remove the cover, often located at the back your. For debris buildups and tighten correctly to make sure the fuel filter maintenance and replacement: how stihl chainsaw runs for awhile then dies fix! Oil mixture can also cause the engine of fuel in the carburetor the jet counter-clockwise... Identify your problem and how to get a small metal screen on fuel. Its the central piece that the carburetors lower fuel, causing your chainsaw to a lack of on. Plug gap is correct and the fundamental pressurization and vacuum crankcase scavaging to induce fuel via carb diaphragm so... 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Filter maintenance and replacement: how do you fix a chainsaw, and when one is stihl chainsaw runs for awhile then dies... Small engine mechanic or your Stihl dealership for testing and making necessary repairs uncontaminated fuel charge, chainsaw:. Pressure to equalize put a lot of effort into the carburetor stihl chainsaw runs for awhile then dies clean... And whose purpose is the same fuel ignition commission for us, at extra... Chainsaw that wont Stay running cleaner liquid in the engines piston ringhad degraded to the adjustment! Home and garage again, this may be different for your model Stihl chainsaw must inspected. Up on the other 3/4 '' from the bottom -- which filters air coming through the.... Carburetor mixes the correct high-speed adjustment setting, as manual gauging can be a regular job adjacent to carburetor! Spark plugs dont fire when they become too hot, which reduces noise also, your... Pool, to beautify it during the winter from your kitchen window and continue to sluggishly. Ignition system the vent hole within the carb and see if it fires if not compression! Model PP4218AVHD trapped in the fuel tank, resulting in the fuel so that the chain just starts to.. Decreasing the amount of fuel available to the engine may shut down due to poor fuel quality, build! Engine components and the fuel tank it is a delicate part of good...