However, a damaged air filter should be replaced. When was the last time the fuel filter and lines were replaced? Check the carburetor's adjustment screws. Wait for the tank to cool, lift the lock lever on the fuel cap, and slowly turn it about 1/8th of a turn counter-clockwise to let the remaining pressure vent before proceeding to remove the cap. Together we put a lot of effort into the maintenance of our gardens over the last few years, we become obsessed with it. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. If the issue persists, consider assessingthe fuel lines and ignition system. The chainsaw will bog down or stop running. But, on the subject of quality equipment: I bought my Stihl 30 years ago, it has been used ALOT, and has never needed any work whatsoever. When the fuels volume is not regulated, theres a huge tendency for it to become too rich. It is important to note that loosening a screw increases the fuel flow rate and enriches the mixture while tightening the screw has the opposite effect.If the idle screw is too loose, the mixture will be excessively rich, and the chainsaw will not run even at idle. How old is it? The saw is less than two years old. Vapor lock is surely one of the most common reasons why an engine doesnt start when hot. Using a screwdriver, loosen the air filters bolts in place. This is also the key to prevent piston failure. Pull the filter out of the tank using a filter hook or a clean bent wire. IMO you have to deterimine if it's fuel or ign problem. Furthermore, the spark plug provides the ignition to initiate combustion. 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. Have a Stihl 028 that I picked up used. Following wgietz, when I get the warm stalls, I loosen the gas cap and retighten. Let me assure you that the contents of your fuel will certainly produce sticky white residuesover time. Service manual for 038 says one screw in the top end, the other 3/4" from the bottom. Before making any repairs, shut off your chainsaw, wait for all moving . Before proceeding with the carburetor, one important area to check is the filters. This setting varies by model. This implies a blockage, either in the carburetor or in the fuel lines. The expansion makes the chain longer. Inspect the spark plug to see if it's workable. There are adjustment screws on the carburetor to make these adjustments. Sounds like a partially blocked pickup body in the fuel tank.This will increase the vacuum in the fuel hose, which in turn causes air to be released into the carb . Running your engine lean over a long period is likely to cause a piston failure. Why does my Chainsaw Die at Full Throttle. Occasionally, an inadequate air/fuel mixing ratio may potentially disrupt the regular operation. It starts like a champ and runs fine for 20 minutes or so of tree cutting. The action you just performed triggered the security solution. If youre a regular chainsaw user and wonder how to solve the problem, this blog will help. Then your spark plugis likely to be at fault, so it should be replaced. If the screw is too loose, the mixture becomes rich. In addition, you will find links to more detailed information on each issue. 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. Then I thought, "What if the gas being pulled out of the gas tank isn't being replaced by air?" Spark plugs should be inspected every once a year to avoid ignition problems for sparking up. Thanks wgietz. As an Amazon Associate, we earn from qualifying purchases. This kind of thing is pretty often something to do with a pressure valve on the gas tank. 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. Examine the difference in pressure readings between a hot and cold engine. I worked fine first year, now it has the same problem as others. Remove any old fuel by thoroughly wiping the bowl and removing any impurities. Read morehere. How about a fuel line that is pinched in the bottom of the tank? Sawinery is a one-stop source for anything woodworking-related. These cause clogs, which lock vapors in the tank and prompt engine bogging. I haven't used it throughout the winter and today I put some new fuel and chainsaw oil in it. It would catch slightly when warm. Why do you want a plant bed adjacent to the pool, to beautify it during the winter from your kitchen window? it's mainly because the piston skirt is swelled and rubbing on the cylinder and rapidly scoring the P/C. Once the engine (and the spark plug) have cooled off, you should be able to run the engine again. Or starts and stalls. If the chainsaw doesnt start when hot, check your fuel tank to see if there isnt a vapor lock in the fuel lines. While pulling the starter recoil rope, you may notice a loss of compression. Vapor lock happens when excessive heat and vapors build up in the gas tank and aren't vented properly. Leaves drop in the Autumn, you clean them up for your compost pile, or for the kids to play in the pile, and admire the tree as a proud sculpture. I like to replace it annually and more often if I begin using the saw more regularly. The above adjustment method could be used to fix most engine problems. Should cost about $25. It died last week cutting some wood. His brainchild, Sawinery, allowed him to do so as well as connect with other craftsmen. the chain is movable but not easilythe chain oil comes out automatically and I am not certain there is enough. Could it be a bad fuel pump diaphram? The standard setting for your model Stihl chainsaw is shown right above the adjustment screws. Sprocket and/or clutch If the chain breaks, the clutch is activated to stop the chain from spinning. Such a problem is more likely to occur if your chainsaw is poorly maintained, or has been in use for quite a while. This deposition becomesquite imminentafter prolonged use and impacts spark quality, especially at higher firing temperatures. 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. Steps we took to get to the final result. But here, the pistons wear rate increased at high temperature due to thermal expansion, which was why its high-temperature compression was almost zero. The fuel delivery deals with the fuel flow from the tank to the engine via the carburetor and the fuel lines. 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 . Check if both ends are cleared by spraying on the other end. This buildup is quite likely to occur after prolonged usage and affects spark quality, particularly at higher firing temperatures. i love the saw, but it is hard to start. It is difficult to diagnose problems like this without seeing it first hand. Sounds like a case vacuum leaking down or a case pressure leaking down. If there isnt much dirt buildup, a soap and water solution will beadequate. The L screw is turned counter-clockwise one full turn. If the high-speed screw is too open, the combustion chamber will accumulate excess air preventing ignition. Another problem is prolong storage the little passages get gummed up. Install a new one if itsquality has worsened. Wrapped our island in board and batten and painted it functional gray. 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. Together we put a lot of effort into the maintenance of our gardens over the last few years, we become obsessed with it. Easily find manuals and replacement parts on your phone while youre DIYing in the garage or garden. When this happens, its best to get a new spark plug instead. If you notice any wear or damage, its better to replace the air filter immediately to avoid compromising the air circulation of your chainsaw. opening. Usually a stalling condition would be a lean mixture (dirty, adjustment, gas starvation, or maybe Idle set too low). 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. A sunken hot tub, dedicated game room, tree house, hidden wine cellar and more. Next, while the chainsaw is idle, make sure the chain is not moving. I recently came upon a Poulan chainsaw with a single-piston ring in its engine. 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 problem lies in your ignition and must be fixed. The thing I can't figure out is what caused it. 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. Any ideas? The mass flow rate of the air-fuel mixture entering the engine at idle is controlled by the idling (I) screw. Then close it and start your chainsaw again. Musta gotten blurry and missed that. Check that the choke is operating properly. I have a T435 Husqvarna chainsaw. Here I never have watered mine, just let nature take its course, and this year we are having a drought, and still it 'flowers' for us. Often left unnoticed, the air circulation of the engine can also cause problems. . !. Here are instructions to clean a couple of types of Stihl air filters. I advise bringing your chainsaw to a small engine mechanic or your Stihl dealership for testing and making necessary repairs. Such a problem is more likely to occur if your chainsaw is poorly maintained, or has been in use for quite a while. DO NOT use heat on the filter as this can damage it. To thoroughly clean the carburetor, spray carb cleaner liquid in the insides and out to avoid jamming the jet. Probably a fuel starvation or air leak. These tips can help you tackle the onslaught of papers, meals, laundry and even help you find your keys, Ask these questions before signing with a contractor for better communication and fewer surprises along the way, Set out some seed and grab your field guide. I recommend that you perform a compression test when your chainsaw is cold. Chainsaw vs Sawzall. Do you envy the magnolia in your neighbor's yard, get some harbingers of Spring into your space. I have a Poulan Pro model PP4620AVX, 46CC, and mine stalls out when I go to gas it. The pressure valve allows air into the tank but attempts to keep fuel from getting out, I suppose it could become plugged. I alway put a mark on the screw to housing to know where the screw was set and to see it they vibrate one way or the other. 5) tank not pressure tight. Leaves falling for two weeks at the end of your pool year, so cut down the tree - Ugh, go back inside to your computer, smiley, a bug may attack you. Follow all safety instructions provided in your equipment operators manual prior to diagnosing, repairing, or operating. Access to manuals and parts right there makes it convenient.". You may be able to clean or rebuild your carburetor to get it working again. Copyright 2023 eReplacementParts.com Inc. The high temperature causes excessive vapor buildup in the fuel lines, preventing the liquid fuel from flowing into the carburetor. So would removal and replacement of fuel cap to relieve vacuum - should allow several more minutes of running if the sasquatch is correct. It is worth notingthat the air-fuel mixture must be compressed to sufficient pressure and temperature to produce enough power during the power stroke. 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. Turns out the cap does not vent because its on the side. This also creates a hard starting condition. I use my saw frequently during the winter and sparingly the rest of the year. ($5k for the cheapest. There are also many other possibilities but the saw if of current generation is probably not worth the time, money and effort. The passageways can become clogged and the small components can fail to function correctly which can be the reason the chainsaw stops running. 2022 LawnMowerForum.com. One day started surging when hot and then would shut down. Connect the tester to the spark plug socket and pull the cord in each of the two cases. Solution: Filter Examination and Replacement: How do you Fix a Chainsaw that wont Stay Running? Nearly every weekend you will find us doing small or big jobs or just enjoying our garden. Looked like someone forced it on and damaged the fuel line in the process. You could add a postlight or two on the far side of the pool from your house, so it does not get between you and the kids in the pool. The reason why there are so many fixes is because there are a lot of different reasons why the engine dies after it starts. Also didn't fix the problem. If you find the screen is extremely dirty, damaged, or has holes in it, replace it with a new spark arrestor screen. My Stihl has one. On and of switch plus choke Its all managed by one lever. The piston ring keeps thegases from entering the crankcase during the compression stroke and maintains sufficient combustionpressure. The sprocket enables the chainsaw to spin. One of the biggest problems was that I would use it for a few minutes and then go to idle and it would stall and refuse to start till it cooled down. Clogged air and fuel filters and clogged carburetor jets are the most common causes of the problem. Only a select few varieties of wood are suitable for use in outdoor projects, among these are cedar and pressure-treated lumber. A damaged fuel filter can also allow debris to enter the fuel lines and cause a clog there. I agree with removing the cutback fruiting tree. A hint that this is happening is the saw will be harder to pull through on the rope when it quits and easier when it cools off. There will also be the same excessive carbon deposits in the fuel arrestor. The reason why there are so many fixes is because there are a lot of different reasons why the engine dies after it starts. Never run your engine at WOT, as this can damage the engine components considering the lean fuel mixture it is operating at. The gas cap is very difficult to remove and I have to use large pliers to untwist it. Also, sounds like your drowning yours with that sprinkler system. Air leakage into the carburetor becomes imminent if the carb-engine connection becomes loose. You may well be right that crank seals or gaskets could be compromised . Normally, they get coated with black carbon deposits caused by too-rich fuel mixtures. A Few Routines Help a Home Run More Smoothly, 10 Things to Ask Your Contractor Before You Start Your Project, A Quick-Start Guide to Bird-Watching for Fun and Learning, Basement of the Week: Smart Cost Cutting, Beautiful Results, I am Trying To Close My Summer and Start My Winter As Most Challenging, Cub Cadet snowblower cant find fuel shutoff, Politique d'Utilisation des Cookies de Houzz. #1. hello all, i have a 2 year old ms361 i bought new. Looks like you are making a good start. Powered Outdoors participates in several affiliate programs by sharing links to products and sites we think you'll benefit from. The consent submitted will only be used for data processing originating from this website. When cool, the engine will turn over. If your chainsaw won't stay running, here are the things you can try: Check if the fuel tank's vent holes aren't clogged with deposits. You will need to test the ignition coil to determine if the coil or the spark plug is causing this symptom. i had the fuel line replaced last season. Anyone want to buy my one year old used Poulan? This is a common problem that mainly occurs with older chainsaw models. Its function is to release pressure from the pistons to enable the engine in starting easily. 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). It's just a line with a (grub) screw in it if clogged or the screw works into the line tank won't vent. In this post, I will discuss the above factors that lead to this problem in more detail. How do you Fix a Chainsaw that wont Stay Running. Fuel can be a big problem when it comes to a chainsaw not running well and dying. To clean your carburetor, you would first need to take it off by removing the air filter. I already checked the fuel filter and gave it fresh fuel. Typically, older engines are more likely to have scored cylinder walls that add to increased wear and prevent the engine from producing adequate compression, thus leading to the saw dying out. This blockage eventually causes your engine to run lean and, as a result, bog down. Cut off enough fuel line to make a good connection and it's running fine now. For a better experience, please enable JavaScript in your browser before proceeding. Faulty tension on these three screws can also cause the engine to stall on a regular basis. 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. runs well for about 20/30 seconds then dies. As the engine runs, heat will build. Then turn the screw counter-clockwise 1/4 turn. The carburetor may need to be adjusted to correct the fuel-to-air mixture. Then continue to turn it counter-clockwise 1/4 turn further. In order for the engine to not overheat and shut down, the cooling system must be kept clean. This blog is written by a group of Garden Tool enthusiasts. SE CT. Dec 15, 2011. thanks for the quick response. 03 - Stihl String Trimmer Carburetor Repair Kit. This can be the result of worn crankshaft seals, worn piston rings, or damage to the piston. Your chainsaws air filter protects the engine from harmful dirt and debris. Check the ignition coil, gasket, cylinder, and other parts listed in our repair and symptom guide, if your chainsaw engine runs for a while then dies. Again it may not be the problem but one possibility. Adding starting fluid through the choke valve helps assessyour spark plug. Chainsaw then works just fine. To do this, first, remove the spark plug and wait for the engine to cool. Also, some spark plugs dont fire when they become too hot, which is why the chainsaw doesnt start when hot. After you have confirmed the spark plug is in good condition, check the ignition coil to make sure it is functioning correctly. We were unable to add your email to our mailing list. To thoroughly clean the carburetor, spray carb cleaner liquid in the insides and out to avoid . Starts,then dies straightaway,then wont start. If you buy something through our posts, we may get a small commission. Tips from a Professional. Air filter It aids in getting the correct fuel-to-air mixture that goes into the engine. Set Stihl carburetor adjustment screws to standard setting: Begin the carburetor adjustment by placing the H and L adjustment screws at their original standard settings. This will help find the best solution strategy to fix your issue. Don't adjust a carburetor on a cold engine, as the adjustment will be wrong. If the electrode on your spark plug appears to be worn out, replace it. 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. I've tested the coil and sparkplug to check the firing with a meter and reads good (NO EXCUSE NOT TO START). A clogged carburetor is most commonly caused by leaving fuel in the string trimmer for a long period of time. In the case that your chainsaw runs for a while, then dies, it may be possible to simply clean the air filter to correct this symptom. I would not be tempted to walk around the pool barefooted. The 1 week thing is curious. This may be caused by a clogged or faulty tank vent. You can use a vacuum gauge to perform a vacuum test on the fuel tank to determine if you have a problem with the saw venting. Afterward, you need to examine your carburetor and ensure that the jets are unrestricted and clog-free. Explanation on that? Tweak the L adjustment until its sufficient to, Cedar vs Pressure-Treated Wood Uses, Pros & Cons, Cost, Does Vinegar Remove Paint From Wood? . Most Poulan chain saws use fairly common Phelon electronic ignition coils. When the saw becomes hot, the engine may shut down due to a lack of fuel in the combustion chamber. Possible causes:Vapor lock: carb not insulated from engine, heats fuel line, as heat increase runs leaner, increasing heat. This is one of those weird things that crop up sporadically. The chainsaw may need the choke engaged to . How is the impulse line? If your chainsaw gets bogged down after heating up, performing a compression test can give provide us with certain indications. Perhaps dock (who as I recall is an engineer) or a physicist could be more precise but I think the general idea is correct.And speaking of dock: The thread he refers to is the most facinating one I have read on this site. And we make it easy! Use the proper adjustment screw depending on speed to avoid faulty and tightened screws. 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. The spark arrestor screen must be inspected regularly and cleaned when needed. Register today and take advantage of membership benefits. Try running without.? It is usually found in the Fuel Tank cap. Do not rely on neon spark testers, they will lie to you. Feb 27, 2017. Continue cleaning the exterior of the chainsaw including the air intake on the starter. The most common problem causing your chainsaw to run slow or die out is a vapor lock in the fuel lines. 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. I pulled the vent line and found two screws in it that at one time were probably loose but over time the tubing shrunk and presto . If it does you have a fuel starvation problem or a carb air leak or adjustment problem IMO. Robert Johnson is a woodworker who takes joy in sharing his passion for creating to the rest of the world. It is not attractive all winter long (perhaps only to the birds), and not when viewed from the house. With our Fix app, you always have a personalized repair guide on-hand. Spark plug Its much smaller than a car spark plug and whose purpose is the same fuel ignition. If your chainsaw dies at full throttle, it may be due to the following factors: When applying the throttle, the engine starts drawing more fuel from the carburetor to increase its RPMs. When the filter becomes dusty, the airflow is restricted, and the carburetor fails to produce the appropriateair-fuel mixture, causing the engine to bog down. When the spark arrestor screen or exhaust port gets filled with deposits, it will cause ignition problems in the engine, which is one reason your chainsaw dies. The saw is like new and ran perfect last time I used it. The air filter is an important component to run on your Stihl chainsaw. 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. I'd be agreeing with the sasquatchman and a fuel related problem, or possibly even a fault with the ignition when it gets hot. Engines with borderline low compression seem to lose more compression once warmed up. Locate the fuel filter at the bottom of the fuel tank. I installed a new spark plug, and use premix fuel, so that is not an issue. Tweak the L adjustment until its sufficient to keep the engine running. Bucking spikes It aids the chainsaw in doing the cutting task instead of stressing your arms. Muffler (OSHA) It functions similarly to a cars muffler, which reduces noise. 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.) 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. A worn or damaged piston and cylinder will cause this problem. Los Angeles, CA 90013 If clogged, a vacuum can develop in the gas tank after some use and eventually starve the motor of fuel. Again, this may be different for your model Stihl saw. It can be due to a vapor lock in the fuel tank. Spray a Stihl Varioclean Cleaner or a mild dish detergent and water solution to the outside of the filter. After that, closeit down and start your chainsaw. was adjusted just in case turning the Hi and Low screws does nothing. If your chainsaw starts but then dies, always begin troubleshooting by checking the air and fuel filters and clearing any dust/debris deposits found. Knock dirt out of the filter or use compressed air to blow air from the inside. If the thing rev's off carb when you spray a one or two second blast down the carb (which creates a rich condition) I say it's a leanout condition either by adjustment or fine passages gummed up. It's about 2 years old and has some mileage on it from clearing Hurricane Katrina damage, but it's in good shape. Occasionally replacing the fuel filters is recommended for maintenance. Stubborn deposits are one of the most common reasons why your chainsaw continues to stall. 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. The carburetor has three adjustment screws: low-speed (L), high-speed (H), and idling (I). A Stihl chainsaw will start and then die when it no longer gets the air, fuel and spark it requires to keep running. Secondly, the chainsaws RPMs would increase considerably if your carburetor is tuned to operate at a lean fuel mix. If the saw has been in use for many hours, it isn't unusual for it to clog and prevent air . Why it is getting hot and how to fix it so it will stay running. I have a Poulan Chainsaw rebadged as a McCullock here in Australia. Unscrew the carburetor, inspect it for damage, and clean it if necessary. Start the Stihl chainsaw and allow it to run for about 10 minutes to warm up. New part-time arborist. Air filters are pretty affordable, and they should be replaced once a year to alleviate engine problems. The second situation is when the Stihl 180 chainsaw worked fine, then gradually in a short time it lost power and died out, while overheating of the cylinder is observed. Another possible occurrence is fuel vapors building pressure which causes vapor lock. I have a Husky 51 that had same problem. 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. Check the filters quality. The L screw controls how much fuel enters the carburetor at low speed, whereas the H screw controls thefuel flow into the carbat high speed. i had the carb kit routine done last season as well. Don't know your zone, but here in good ole Brooklyn new york i have a C M going on almost 28 years, never fertilized, and get 'flowers', which of course, they really are not flowers, but colorful bracts, each year late July into mid to late October with none of the problems you say. The heat causes the fuel to evaporate, thus raising its vapor pressure which inhibits the further flow of fuel to the carb. A punctured fuel line can draw air into the fuel system resulting in a chainsaw running sluggish because too much air is being introduced to the cylinder. Lastly, I would advise you to always mix the engine oil and fuel in a ratio prescribed by the owners manual. Inspect the ignition module with a tester. Remove dirt and debris from the air intake and cooling fins to ensure air is able to circulate across the cylinder to keep the engine cool.
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