However, a damaged air filter should be replaced. Bar Its the central piece that the chain circles around. How long the chainsaw runs before dying depends on how badly clogged the air filter is. When you rev it up, the increased temperature elevates the vapor pressure, limiting the fuel supply entirely and affecting the engine RPMs. But, it's alway good to know where the carb. 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. Use a wire brush to clean the spark plug, and remove any excess deposits. Running old gas can be a big culprit, but many other items can cause a Stihl to die. Access to manuals and parts right there makes it convenient.". 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 . 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. The filtershould then be cleanedwith a dental pick or a thin metal rod. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Pull cord Its the chainsaws startup mechanism. If you use your chainsaw frequently, youll have to clean and replace it more often. I have a T435 Husqvarna chainsaw. Simply put, you run it for awhile, and it vacuums itself out of gas. Tips from a Professional. 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. This creates a lean mixture, so as a result, the saw may start perfectly. You may be able to clean or rebuild your carburetor to get it working again. Clean around the air filter to remove any dirt and sawdust. Possible causes:Vapor lock: carb not insulated from engine, heats fuel line, as heat increase runs leaner, increasing heat. Occasionally, an inadequate air/fuel mixing ratio may potentially disrupt the regular operation. There are adjustment screws on the carburetor to make these adjustments. This is a common problem that mainly occurs with older chainsaw models. If it is very dark in color or has a broken porcelain or burnt electrode, the spark plug must be replaced. Fix your Lawnmower with our Lawnmower Troubleshooting tool. I have been working on a. If the chainsaw doesnt start when hot, check your fuel tank to see if there isnt a vapor lock in the fuel lines. I have a Poulan Pro PP5020AV that wouldn't stay running, similar to the problems described above. I also have a Poulan with the same behavior. The 1 week thing is curious. Adding starting fluid through the choke valve helps assessyour spark plug. Make sure the fuel is made up of gasoline and oil mixed at a ratio of 50:1. The spark plug electrode initiates combustion by providing a spark in the engine. Locate the fuel filter at the bottom of the fuel tank. Use quality line made for fuel if OEM is not handy/available. Could it be a bad fuel pump diaphram? 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. Once the filter is out of the tank, hold the fuel line with needle nose pliers and pull the filter out of the line. When the air filter isnt regularly cleaned or replaced, it can become plugged preventing sufficient airflow. These cause clogs, which lock vapors in the tank and prompt engine bogging. Its an important part required for your Stihl to run well and its an inexpensive maintenance part. 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. Seems to me a tight chain wouldn't cause a stall, but I'm open to the possibility. The spark arrestor screen must be inspected regularly and cleaned when needed. 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. Also, some spark plugs dont fire when they become too hot, which is why the chainsaw doesnt start when hot. Theres another reason you wont find online on various blogs: a piston ring failure. 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. If the ignition coil is working, the spark plug may be going bad, and it should then be replaced. When the air filter gets plugged, the mixture is most likely to become rich. This means air is what cools the engine. The chain and bar might expand at different rates and sizes. This pattern continues to repeat itself even after the saw is well warmed up. Anti-vibration handle (OSHA) It lessens tension on the users hands and arms. Tweak the L adjustment until its sufficient to keep the engine running. It can be due to a vapor lock in the fuel tank. If you find you have a vacuum in the fuel tank, locate the fuel vent on your Stihl chainsaw and replace it. 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. Looked like someone forced it on and damaged the fuel line in the process. Throttle Interlock It keeps misuse and accidents for occurring. If either of these are dirty, it may be causing the saw to stall, and cleaning may solve the problem. Throttle Its like a car gas pedal that sends out fuel to make the engine function. Low and high adjustment Its function is to control the saws idling speed. That is your problem I think..too much nitrogennitrogen fertilizer makes too much leaf growth only. The above adjustment method could be used to fix most engine problems. Je peux rejeter les cookies non essentiels en cliquant sur Grer mes prfrences . Gauge and tighten correctly to make sure its the right hold. 5) tank not pressure tight. Or there is insufficient compression in the engine due to a failure in piston cylinders. Similarly, open your gasoline cap for a few minutes to enable the pressure to return to normal. 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. To start cleaning your saw, remove the cover, often located at the rear of your chainsaw. You can email the site owner to let them know you were blocked. This site is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. Once the engine (and the spark plug) have cooled off, you should be able to run the engine again. (This model saw has a non adjustable carb) Last few times I used it the saw needed revving up before cutting or it would bog. Today I experienced a similar problem with my Husqvarna 345. Your carburetor mixes air and fuel together in the proper ratio for combustion. Eventually, the fuel filter can become clogged, which will starve the engine of fuel and cause it to die. Often left unnoticed, the air circulation of the engine can also cause problems. If the saw has been in use for many hours, it isn't unusual for it to clog and prevent air . Click to reveal i have a stihl 290 model. Check if both ends are cleared by spraying on the other end. I have a Husky 51 that had same problem. The sprocket enables the chainsaw to spin. Then continue to turn it counter-clockwise 1/4 turn further. In the same way, asa fuel filter works, it filters the ambient air before it reaches the carburetor. Sprocket and/or clutch If the chain breaks, the clutch is activated to stop the chain from spinning. 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. The expansion makes the chain longer. Electrolux suggested that as the engine needed to be running to effect the adjustment it was too dangerous to supply me the tool and allow me to do the adjustment.I took this as an insult as I had been doing just that for forty years. 79Fiesta. Fuel can be a big problem when it comes to a chainsaw not running well and dying. Any ideas? I worked fine first year, now it has the same problem as others. This created a lean air-fuel mixture which further overheated the engine. Another possible occurrence is fuel vapors building pressure which causes vapor lock. You are using an out of date browser. Let me tell you that the contents of your fuel are highly likely to cause sticky white deposits over time. Sprinkle a carburetor cleaner. The saw is about 4 years old, but doesn't have 30 hours on it. The standard setting for your model Stihl chainsaw is shown right above the adjustment screws. Then remove the exhaust cover to access the spark arrestor screen. Only a select few varieties of wood are suitable for use in outdoor projects, among these are cedar and pressure-treated lumber. Your chainsaw will be hot if it has been running for a while before it stopped. Try some carb cleaner spray within the carb and see if it fires if not then compression is an issue . It would equalize after sitting for a while and run good again later. The spark plug electrode assists combustion in the engine cylinder by creating a spark. It even gives us gorgeous Fall color from there on in. If it pops/runs its fuel. It is usually found in the Fuel Tank cap. Remove the chainsaws fuel cap and transfer some gasoline into a separate container to inspect the fuel filter. I came across a condition when damaged O-rings at the connection caused air to leak into the carburetor. Thanks wgietz. Looks like you are making a good start. How do you Fix a Chainsaw that wont Stay Running. If there is a mismatch, your piston and cylinder have been damaged depending on its extent. Try running without.? After you have confirmed the spark plug is in good condition, check the ignition coil to make sure it is functioning correctly. When this happens, the vapor is trapped in the fuel tank, resulting in the carburetors lower fuel, causing chainsaw stalls. Replace your spark plug if the electrode appears worn out. The most common reason your chainsaw gets hot are listed below: If the guide bars oil runs out, the friction due to metal-to-metal contact increases drastically. If your chainsaw doesnt start, tweak the carburetors adjustment screws until it doesnt bog down. You never want to run your chainsaw without an air filter. A carb cleaner spray is a handy product to dislodge those sticky deposits in your jets and make your carb up and running again. A dirty air filter -- which filters air coming through the . Ensure that theres no vapor lock in the fuel tank. Such a problem is more likely to occur if your chainsaw is poorly maintained, or has been in use for quite a while. to fall too low, prompting the engine to stop even with gasoline. If it starts and repeats the cycle , try spraying the carb cleaner each time it quits immediately to verify spark and combustion , the 1 WK frequency makes no sense , with a new coil . 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. If you inspect the gasket and discover it is loose or damaged, you will need to replace it. Find replacement chainsaw parts:https://www.repairclinic.com/Shop-For-Parts/a30/Chainsaw-Parts?TLSID=?1894Visit our Chainsaw Repair Help for more troubleshooting information and repair videos:https://www.repairclinic.com/RepairHelp/Chainsaw-Repair-Help?TLSID=?1894Chainsaw starts, then stalls? Check the breather on the fuel tank to make sure it is not blocked. The consent submitted will only be used for data processing originating from this website. 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. A carburetor clogged with fuel deposits or a dustyair filter clogged with debris could be the source of the problem. Tips from a professional, Chainsaw Seized Up. My Stihl has one. Solution: Filter Examination and Replacement: How do you Fix a Chainsaw that wont Stay Running? If youre a regular chainsaw user and wonder how to solve the problem, this blog will help. STIHL Chainsaw Starts Then Dies. Detach the air filter. 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. Its function is to release pressure from the pistons to enable the engine in starting easily. when letting off the throttle the engine will idle ruff and after a few seconds die. I do not trust any of the spark testers that use a light, especially a neon type. Take the bowl and bowl nut out of the carburetor. There are also many other possibilities but the saw if of current generation is probably not worth the time, money and effort. You can also find information on a chain not turning, the engine only running with the choke on, and more. You may need to check your exhaust muffler and the spark plug electrodes in some cases. Chainsaw Dies when Hot, what are the reasons? Do a cold compression test and another when the saw quits. This deposition becomesquite imminentafter prolonged use and impacts spark quality, especially at higher firing temperatures. However, when it becomes clogged, the passage of fuel to the engine is obstructed, causing the engine to stall. #3. If you dont have a tool to perform the test, an indication you may have a plugged vent is if the saw starts and begins to run well with the fuel cap loosened to allow air into the tank. 20 minutes with full choke or 1/2 choke to maintain fast idle . Check the carburetors jets and make sure that they are kept clean and free of debris. Ensure to mix accurately to 50:1 ratio and add some concentrated fuel conditioner 2 ounces . JavaScript is disabled. Does this indicate a fuel issue? Dont let go of the fuel line. I prefer to just replace it. Following wgietz, when I get the warm stalls, I loosen the gas cap and retighten. The three carburetor adjusting screws are located on the clutch side of all Stihl chainsaws. Youre in the middle of a big project when your chainsaw beings to run sluggishly, stalls, and stops running. Insert a new fuel filter into the line. This may cause the saw to die out when hot. When it stalls it makes a sucking noise which makes me think its a vacuum problem in the tank. This is one of those weird things that crop up sporadically. Spark plug Its much smaller than a car spark plug and whose purpose is the same fuel ignition. If the filter looksclogged, buy a new one toreplace the previous filter. Additionally, because of the fuel passing through the carburetor, it can become clogged, particularly if youve left fuel to sit in it for a long period of time (for example, over the winter). If you are continuing to have problems with the carburetor, bring your chainsaw to your local Stihl dealer. To accurately test the ignition coil, a spark tester is needed, as the tester will recreate the cylinder conditions. 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. Turns out the cap does not vent because its on the side. Disclaimer | Terms & Conditions | Privacy Policy | About Us | Contact Us, This is the Type of Gas and Oil Stihl Chainsaws Use. Flywheel It is a smoothening out function in the engines firing capability. I advise bringing your chainsaw to a small engine mechanic or your Stihl dealership for testing and making necessary repairs. Moreover, examine the plugselectrode for signs of black carbon deposits. Probably a fuel starvation or air leak. Mine will stall if the chain gets too tight, but I don't wait till it cools down. You can try to clean the spark plug with a wire brush and reuse it if its just a little dirty. To turn it counter-clockwise 1/4 turn further a light, especially at firing. Itself out of the engine only running with the same fuel ignition chainsaw user and wonder how solve. To the problems described above starve the engine in starting easily an issue your saw, remove cover! 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