Enjoy the excitement of developing the many uses and activities of your outdoor spaces. Decompression valve It can only be found on some saw models. Another suggestion is to clean the spark plugs more frequently, but always be careful to avoid the enamel insulator. Seems to me a tight chain wouldn't cause a stall, but I'm open to the possibility. Throttle Interlock It keeps misuse and accidents for occurring. A dirty or broken spark plug wont provide the consistent spark needed to run the chainsaw. Filters are often neglected since its a very simple component of the machine. 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. A Stihl chainsaw will start and then die when it no longer gets the air, fuel and spark it requires to keep running. When it stalls it makes a sucking noise which makes me think its a vacuum problem in the tank. And we make it easy! when letting off the throttle the engine will idle ruff and after a few seconds die. Again it may not be the problem but one possibility. Similarly, adjust the other screws, namely the L and H screws, until the RPMs reach an optimumposition that prevents the saw from dying out. Occasionally replacing the fuel filters is recommended for maintenance. Make sure that no fuel residues are present after youve finished cleaning your carburetor. 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. Is this indicative of a good coil or should there be a strong blue spark? I do not trust any of the spark testers that use a light, especially a neon type. Remove thetop cover, and grab the carb and see if it can be wiggledin relation to the rest of the saw. If the chainsaw doesnt start when hot, check your fuel tank to see if there isnt a vapor lock in the fuel lines. Check the exhaust to make sure it is not blocked even Partially.. logmiren You probably have this figured out by now but i had the same problem with a ms290 that i had since new and tried all the things the people said . The expansion makes the chain longer. 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. Looked like someone forced it on and damaged the fuel line in the process. After the engine has been running awhile, it dies. If you cant remove the clog or you find the fuel line is dry and cracked, you need to replace the fuel line with a new line of the same diameter and length. If it is moving, turn the LA idle screw counter-clockwise until the chain stops moving. It would catch slightly when warm. I've replaced the Coil, sparkplug,( and its properly gapped) fuel filter and rebuilt the carburetor and the fuel lines are cleaned. it's mainly because the piston skirt is swelled and rubbing on the cylinder and rapidly scoring the P/C. (i'm not kidding, if you have the info, i'll take it!!) 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. A valid compression test would go a long way . 13 Reasons Your Stihl Chainsaw Wont Start (SOLVED! Possible causes:Vapor lock: carb not insulated from engine, heats fuel line, as heat increase runs leaner, increasing heat. Ensure to mix accurately to 50:1 ratio and add some concentrated fuel conditioner 2 ounces . Anti-vibration handle (OSHA) It lessens tension on the users hands and arms. While pulling the starter recoil rope, you may notice a loss of compression. ($5k for the cheapest. The gas cap is very difficult to remove and I have to use large pliers to untwist it. 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 . These are throw aways after a very limited time in use. This is also the key to prevent piston failure. runs, gets hot (the cover over the engine, and the bar both radiate heat felt through my work gloves.I did a quick search and found another forum with small engine experts. As mentioned, push do not screw them in place. Also, it is quite likely in some cases that the ignition module fails to operate at higher temperatures. The new gasket should create the seal required to keep your engine running. Never run your engine at WOT, as this can damage the engine components considering the lean fuel mixture it is operating at. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. I have a Husky 51 that had same problem. A bad ignition coil will not be able to provide sufficient voltage to the spark plug. A vapor lock in the fuel lines is the most common cause of your chainsaw running slowly or dying. New line and it ran great again. If not then pursue why , as you have indicated . I would mark where the screws are now and count the turns in say 1 3/4" to seat lightly. These valves allow trapped gasoline vapors to escape. Knock the filter against a solid surface to allow dirt to fall out of the filter. Check the carburetors jets and make sure that they are kept clean and free of debris. it sounds simple enough but so far i havent found anything. Make sure the filter is securely attached to the fuel line. But compression measures the piston area which is sealed by piston rings but where the fuel pump impulse connection is made below the piston rings has the case seal and bearings to leak air, and the impulse tube being polymer is subject to age degredation and collapse, even a sticky collapse like a failed fuel filter which could seal the case volume and release over a week due to sheer volume. Clean around the air filter to remove any dirt and sawdust. My Stihl has one. I've changed the fuel out also. The problem was it was running to lean and over heating. This pattern continues to repeat itself even after the saw is well warmed up. Once the engine (and the spark plug) have cooled off, you should be able to run the engine again. You might have intermittent ignition coil. Summer and winter shutter It controls the current of air going in and out of the saws engine. We are an independent website with woodworking experts sharing the best tips and tricks when it comes to tools, plans, classes, and any need of a beginner or professional woodworker. My customer this morning delayed until 1:00, so I went out to test the 028 some more. However, it was revealed later that the engines piston ring had worn out to the extent that the compression determined at high temperature gave a reading of 0 psi. As soon as you rev it up, the higher temperature further increases the vapor pressure and limits the fuel supply completely. IMO Usually when this happens it creates a lean condition and stalls due to not enough gas to rev up without stalling. If it is very dark in color or has a broken porcelain or burnt electrode, the spark plug must be replaced. Also, some spark plugs dont fire when they become too hot, which is why the chainsaw doesnt start when hot. Not sure if flooded or starved? 2022 LawnMowerForum.com. You may well be right that crank seals or gaskets could be compromised . How do you Fix a Chainsaw that wont Stay Running. Ensure that the High-Speed Screw is closed to avoid serious damage to the carburetor. Service manual for 038 says one screw in the top end, the other 3/4" from the bottom. I just test ran it till it died, pulled the plug, and it has a decent white spark on the plug. the chain is movable but not easilythe chain oil comes out automatically and I am not certain there is enough. You can try to clean the spark plug with a wire brush and reuse it if its just a little dirty. Then your spark plugis likely to be at fault, so it should be replaced. Were here to tell you, Not a Naturally Organized person? 5) tank not pressure tight. Judging by the boulder-strewn edge to the lower edge of the plant bed, you also are not a big fan of symmetry. Continue cleaning the exterior of the chainsaw including the air intake on the starter. The mixture was leaner, resulting in overheating. Suppose the engine doesnt start with the fluid. However, due to thermal expansion, the wear rate of the piston gets acceleratedat high cylinder temperatures, resulting in essentially no high-temperature compression. 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. These parts get clogged when there are unruly debris and deposits. If the electrode on your spark plug appears to be worn out, replace it. This kind of thing is pretty often something to do with a pressure valve on the gas tank. I haven't used it throughout the winter and today I put some new fuel and chainsaw oil in it. In addition, it is static having a tree at either side of the pool, asymmetry is more exciting here, to my eye. Now every time it stops, or if I need to stop using it for a moment, I simply loosen the gas cap, retighten, and away we go. If the filter is very dirty, wash it in a mild dish detergent and water solution, and rinse from the inside outward until the water runs clear. When you find a clogged fuel line, remove it from the chainsaw and clean it to open the line. It may not display this or other websites correctly. New part-time arborist. Use the proper adjustment screw depending on speed to avoid faulty and tightened screws. was adjusted just in case turning the Hi and Low screws does nothing. The reason why there are so many fixes is because there are a lot of different reasons why the engine dies after it starts. Had it for years and ran great. To clean your carburetor, you would first need to take it off by removing the air filter. Using a screwdriver, loosen the air filters bolts in place. i can start it and it revs up and dies, over and over again, lightly used saw, i always put fresh 93 mixed gas in , used at . Tips from a Professional. Once I adjusted the carby it was fine. Your IP: These screws have different functions, and when one is tightened or not set properly, it can restrict fuel flow or cause RPMs [1] to fall too low, prompting the engine to stop even with gasoline. If your saw dies at idle, turn the idle screw clockwise until the chain just starts to move. No venty. Great job! Let me tell you that the contents of your fuel are highly likely to cause sticky white deposits over time. Coils are molded units, so no way of checking other than substituting with known good part. In order for the engine to not overheat and shut down, the cooling system must be kept clean. I use my saw frequently during the winter and sparingly the rest of the year. Fix your Lawnmower with our Lawnmower Troubleshooting tool. Then turn each screw counter-clockwise with the number of turns indicated above the screw. This website is using a security service to protect itself from online attacks. cascio.offsite@gmail.com. Bad coil, test it with a meter next time it die's. Can you move it by hand, with gloves? Robert Johnson is a woodworker who takes joy in sharing his passion for creating to the rest of the world. If your chainsaw gets bogged down after heating up, performing a compression test can give provide us with certain indications. When it dies give it squirt of gas w/AF off. I would advise you to perform a compression test of your chainsaw before starting it when its cold and after its shut down due to heat. The screws are labeled H for high speed, LA for idle speed, and L for low-speed. The chainsaw may need the choke engaged to . Find replacement chainsaw parts:https://www.repairclinic.com/Shop-For-Parts/a30/Chainsaw-Parts?TLSID=?1894Visit our Chainsaw Repair Help for more troubleshoo. Check the manual provided by your owner for more specific repair information related to your model. I just loosen the chain. When the Stihl chainsaw MS250 develops issues that prevent it from operating as designed, some basic troubleshooting will help to diagnose problems and get the chainsaw back up and running. This can cause the saw to shut off. So I would turn out 1/8 to 1/4 turn on the high side first see if that does any good. Houzz Pro: One simple solution for contractors and design pros. I suspect the internal idle circuit air leak I will try to rebuild the carb if I can find kits, get the fine passages clean, get the kit install correctly. Clean the screen with a metal brush. Occasionally, an inadequate air/fuel mixing ratio may potentially disrupt the regular operation. Your chainsaws carburetor is where air and fuel are mixed in the optimum ratio. A sunken hot tub, dedicated game room, tree house, hidden wine cellar and more. The saw is less than two years old. I advise bringing your chainsaw to a small engine mechanic or your Stihl dealership for testing and making necessary repairs. Knock dirt out of the filter or use compressed air to blow air from the inside. Too many options, get help from your local professionals. Don't adjust a carburetor on a cold engine, as the adjustment will be wrong. The L screw is turned counter-clockwise one full turn. For a better experience, please enable JavaScript in your browser before proceeding. With our Fix app, you always have a personalized repair guide on-hand. It covers problems with a chainsaw not starting, bogging down, or dying. Check if theres any black carbon buildup on the electrode. This video provides information on how to troubleshoot a chainsaw and the most likely defective parts associated with this problem.Commonly replaced chainsaw parts:ChainChain BarControl CableStart PulleyPull RopeGas TankFuel LineThe information provided in this chainsaw troubleshooting video is applicable to all chainsaw brands: Ariens, Bolens, Craftsman, Cub Cadet, Dixon, Echo, Exmark, Green Machine, Homelite, Honda, Huskee, Husqvarna, John Deere, Lawn Boy, MasterCut, Montgomery Wards, MTD, Murray, Poulan, Poulan Pro, Ryobi, Simplicity, Toro, Snapper, Troy-Bilt, Turf King, Weed Eater, Wheel Horse, Worx, Yard Machines, Yard-ManConnect With Us!https://plus.google.com/+repairclinichttps://www.facebook.com/RepairClinichttps://www.twitter.com/RepairClinichttp://pinterest.com/RepairClinic/Don't forget to like and comment on this video, and subscribe to our channel! Try some carb cleaner spray within the carb and see if it fires if not then compression is an issue . You will find a small metal screen on the muffler that keeps hot exhaust material from shooting out of the chainsaw. Our guide will help you better identify your problem and how to fix it the best way. Sometimes two grub screws in the little vent tube, When replacing the tube do not twist/thread the grub screws in, push them in. Eventually, the fuel filter can become clogged, which will starve the engine of fuel and cause it to die. Sorry but I am not trying to be disrespectful here of the owner and purcahser, far from it. We are compensated for referring traffic and business to Amazon and other companies linked to on this site. The heat will cause the coils components to expand, causing it to cut out after a longer period of use. Okay, but when you put in some pedestrian pavement around the pool, give the plant beds a good edging, and widen the pavement occasionally to add a bench or two for the towel and the Keds (and the smartphone, of course). Find the right local pro on Houzz to kickstart your project. After that, closeit down and start your chainsaw. Sawinery is a one-stop source for anything woodworking-related. Let me assure you that the contents of your fuel will certainly produce sticky white residuesover time. It is possible that the ignition is at fault, but doubtful.It is most likely fuel/air related. You can email the site owner to let them know you were blocked. We can easily examine the air filter before checking the carburetor, which maybe causing the chainsaw to stall. Grubs/vent are easy to fix. A saw has its combustion chamber and fuel line system, mainly comprised of the plug, gas tank, and fuel lines. Nearly every weekend you will find us doing small or big jobs or just enjoying our garden. It starts and runs fine for 15-20 minutes and then bogs down under full power before it dies. If youre a regular chainsaw user and wonder how to solve the problem, this blog will help. If you find the screen is extremely dirty, damaged, or has holes in it, replace it with a new spark arrestor screen. His brainchild, Sawinery, allowed him to do so as well as connect with other craftsmen. Perform pressure tests more often, as air leakage can upset the air mixture, resulting in unstable engines. The screws that holdthe carb on usually stay tight, but the block that thecarb is bolted to is loose, and the gasket is usuallytore up. This is a great guide to keep bookmarked. Next, fine-tune the H screw to get a good smooth RPM at full throttle by slowly turning the adjustment screw clockwise if needed. Together we put a lot of effort into the maintenance of our gardens over the last few years, we become obsessed with it. Manage Settings Afterward, you need to examine your carburetor and ensure that the jets are unrestricted and clog-free. I have been working on a. i also dont know how to check the vent int he gas tank. Replace your spark plug if the electrode appears worn out. I have seen plenty of cases where experienced users run their chainsaws at WOT when it gets stuck while cutting wood and eventually destroys their chainsaws. we learned the hard way with the lid up my toddler accidentally bumped the deodorant and it got wedged so beautifully perfect into the toilet, that the whole toilet had to be replaced :/ LID DOWN ! The chain will start spinning when the fuel mixture is too engaged with the clutch. Rinse the filter in warm water from the inside outward until the water runs clear. 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? When cool, the engine will turn over. Also didn't fix the problem. Chain Its the most important piece of the device, which does the cutting. Here are instructions to clean a couple of types of Stihl air filters. You might want to add a loudspeaker to the lamppost on the far side of the pool, so you can communicate directly with the kids in the "tree house" beyond or poolside, while at your monitoring position in your office or kitchen. Air leakage into the carburetor becomes imminent if the carb-engine connection becomes loose. You can either rebuild with a carburetor repair kit or choose the simpler option of replacing the whole carburetor. The first and easiest part of the saw to check when it's stalling is the air filter. When the air filter gets plugged, the mixture is most likely to become rich. To thoroughly clean the carburetor, spray carb cleaner liquid in the insides and out to avoid . Musta gotten blurry and missed that. This means air is what cools the engine. Spray carburetor cleaner into the line to loosen the clog. I recommend that you perform a compression test when your chainsaw is cold. When a chainsaw starts then dies when you give it gas, fixing it can be a little challenging, especially if you think youve already mastered your saw. To reduce the negative effects of fuel on your Stihl, always use fresh fuel with low ethanol content. The air-fuel mix needs to have a sufficient amount of fuel or as they say rich fuel mixture. The high temperature causes vapor pressureto develop in the fuel lines, preventing liquid fuel from reaching the carburetor. This is a common problem that mainly occurs with older chainsaw models. Starts,then dies straightaway,then wont start. Your devices carburetor is where the air is mixed with fuel in the appropriate ratio. Does this indicate a fuel issue? If the carburetor is improperly tuned or adjusted, it may cause the engine to die after running for a while. The above adjustment method could be used to fix most engine problems. If the screw is too loose, the mixture becomes rich. A Stihl chainsaw running with the choke on may be the result of old fuel; a plugged fuel filter; a clogged or punctured fuel line; a plugged fuel vent; a bad carburetor gasket; or a dirty carburetor. Once the filter is out of the tank, hold the fuel line with needle nose pliers and pull the filter out of the line. Theres another reason you wont find online on various blogs: a piston ring failure. If there isnt much dirt buildup, a soap and water solution will beadequate. Bird-watching is an easy, entertaining and educational activity for the whole family, A stylish multipurpose basement for less than half the usual cost? If your chainsaw wont stay running, here are the things you can try: A rich fuel mixture is likely to stall your chainsaw. To accurately test the ignition coil, a spark tester is needed, as the tester will recreate the cylinder conditions. Insert a new fuel filter into the line. All rights reserved. However, a damaged air filter should be replaced. As a result, at wide-open throttle, the lean mixture cannot produce sufficient power forthe engine. The air filter is easily located. 2. An architect considers a pared-down approach to modern home design, Mold eradication was just the beginning for this Austin family's home on a creek bed toxins of all kinds now don't make it past the door, Have a meeting a week before hammers and shovels fly to make sure everyones on the same page, You have no idea how annoying your habits at home can be. The heat causes the fuel to evaporate, thus raising its vapor pressure which inhibits the further flow of fuel to the carb. Old fuel is a big reason why a Stihl carburetor will stop working. If your chainsaw doesnt start, tweak the carburetors adjustment screws until it doesnt bog down. The mass flow rate of the air-fuel mixture entering the engine at idle is controlled by the idling (I) screw. Well I started reading this thread in 2006. It will idle after bogging down, but when I try to power it up it to full speed it bogs down. Los Angeles, CA 90013 https://www.ebay.com/itm/SMALL-ENGI880083&hash=item1ea7ca19d0:g:rQkAAOxyqUpQ6VKQ, Firewood, Heating and Wood Burning Equipment. In this case, youll have to adjust your carburetor. So what I did was loosen the gas cap and retighten it. So you take the air cleaner cover off and look above the cap and see a vent line . I agree with removing the cutback fruiting tree. These vents ensure that the trapped vapors can escape. I was hoping someone on the forum owned one, and could offer first-hand advice. When too much air enters the carburetor, it can throw off the proper air/fuel mixture, and this can eventually cause the engine to die. This also creates a hard starting condition. Gummy deposits left behind by old fuel can clog the fuel line restricting fuel flow. An example of data being processed may be a unique identifier stored in a cookie. Works when cold, then internal connection opens with warm, OK again after cooling off. Let your saw run for approx. Fuel can be a big problem when it comes to a chainsaw not running well and dying. Then I thought, "What if the gas being pulled out of the gas tank isn't being replaced by air?" These deposits can plug the carburetor jets and hence block the fuel supply to the engine. Cloudflare Ray ID: 7a11ba37c98b2c1c I typically change the fuel filter before and after the winter season. If I don't let off of the throttle and go back to idle, it will die out. Begin by removing the spark plug wire. Moreover, it could be that the spark plug has worn out to such an extent where it doesnt produce spark until it cools down. But, it's alway good to know where the carb. Have a Stihl 028 that I picked up used. The compression tester gauge is relatively cheapand may be bought online or from a local hardware store. Locate the fuel filter at the bottom of the fuel tank. You must log in or register to reply here. :)) 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. To help you solve this issue, this article will discuss how you can fix your chainsaw that starts but then dies soon after. WHERE CAN I GET THE DAVID HASSELHOFF LID ?!?!?!?!?!?!? SE CT. Dec 15, 2011. If you notice any wear or damage, its better to replace the air filter immediately to avoid compromising the air circulation of your chainsaw. Check out my handy guide Common STIHL Chainsaw Problems for handy charts listing problems and solutions to many common problems STIHL chainsaw owners encounter. Vapor Lock. HELP Please. Probably a fuel starvation or air leak. Giving it throttle only chokes it out. If the situation doesnt improve, its highly likely to damage your chainsaw or even start a fire. The passageways can become clogged and the small components can fail to function correctly which can be the reason the chainsaw stops running. Another problem is prolong storage the little passages get gummed up. Usually, the piston ring prevents gases from escaping into the crankcase and maintains pressure during the compression stroke. Why it is getting hot and how to fix it so it will stay running. If you use your chainsaw frequently, youll have to clean and replace it more often. Anyone want to buy my one year old used Poulan?