I have a MS250 that's only two years old and has barely been used. It could even bog down when given gas. if (ry==0) By a silver star and you can post unlimited pictures. If the chain is loose or dull it may result in the saw not having enough power to keep running. After a little looking, the two nuts that hold the back of the carb and filter housing were loose, I tightened them up and it ran like a top. Cleaning your chainsaws air filter can lead to an improvement in performance and really should be done as part of your routine chainsaw maintenance schedule. A clogged air filter or spark plug can cause your chainsaw to start and then stop. We may earn a small commission from affiliate links and paid advertisements. If youve checked both the fuel mixture and air filter on your chainsaw and still experience bog down, it may be time to move on to the carburetor. var imagelinks2=new Array() If the idle screw is too loose, the mixture will be too rich, and the chainsaw will not run at all, even at idling. Make sure to properly lubricate your chain with chain oil and check the compression in the cylinder. Why Is My Chainsaw Bogging Down? Stihl Chainsaw Bogs Down When I Give It Gas The Job of the Carburetor Without the right amount of air and fuel in the piston cylinder, the 2-cycle engine in a Stihl chain saw runs inefficiently and the saw loses power. Your manual will provide detailed instructions on how to do this. Clean both of these components if they are dirty. document.write('') When the L or idle screws are not properly set, the idle RPMs fall too low, causing the engine to stalland eventually stop. Check the fuel hose, famous for cracking. myimages[1]="../../../images/top-banner/ez50-banner.jpg" Curtis B. This can also be caused by bad fuel. if (ry==0) Before tossing your chainsaw in the shed, there are a few simple things you should do to ensure the longevity and productivity of your tool. One of the most common causes is a dirty air filter, which can block air from entering the chainsaw engine and prevent it from getting the oxygen it needs to operate efficiently. Proper adjustment is critical for safe operation and efficient cutting performance, and the T adjustment allows anyone to determine the accurate tension of their chainsaw chain in a matter of seconds. When you depress the trigger, a vent on the carburetor opens, allowing more gas to reach the mixing chamber. A daily, weekly, and monthly check-up and cleaning must be performed for optimal performance. Here is a visual troubleshoot guide by Foxboss9 discussing the bogging issues and their solution: A Husqvarna chainsaw bogs down due to a clogged air filter or spark arrester. Click to see full answer. var myimages=new Array() Maintenance is the key to avoiding all that. Vapor lock occurs when the fuel vapor pressure builds up considerably in the fuel tank and isnt allowed to escape from the tank vents. Chainsaw will idle but won't rev. What can cause this? - JustAnswer Dont forget that a maintained chainsaw is a working chainsaw! Why does my chainsaw stall when gas is given? After the overhaul of the piston assembly I used this saw to cut up three rather large downed trees, and some other work. Over time, the spark arrestor can become clogged with soot. In some circumstances, vapor locks created in the fuel tank due to insufficient venting cause engine issues. A carb cleaner spray is an excellent tool for eliminating sticky deposits from your jets and reviving your carburetor. Updated: 00/04/25 or a blockage in the mesh strainer in the pump chamber. Remedy this by adjusting the high-speed screw. I have cleaned the air filter, replaced the fuel filter to no effect. Cleaning the air filter and spark arrestor with, Read More Chainsaw Bogs Down When CuttingContinue, Did you buy a new Stihl chainsaw, remember you cannot go and start using it like any old chainsaw. Aside from the screw setting, you need to check and make sure that the spark plug is in prime working condition. Finally, the ignition system might need to be adjusted or repaired, and for this, you should contact a professional for assistance. Chainsaw starts but dies when I give it gas. Use a starting fluid and letting it run flushes gunk out of the jets as an alternative to rebuilding the carburetor. The most common causes of a Stihl saw stalling out or stopping include clogged air filter, fouled spark plug, stale gasoline, low compression in the cylinder, insufficient fuel reaching the carburetor, blocked fuel lines, incorrect gap between the spark plug electrodes, a worn or broken drive belt, and inadequate lubrication of the saw chain. Next, you should check the air filter to make sure it is clean and not blocked by dirt or debris. Lastly, you should clean the air filter and replace it if necessary. Chain-saw requires constant maintenance to be efficient. myimages[3]="../../../images/top-banner/LX25-FreeShipping.jpg" Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. How did you get the carb off? Jun 16, 2006. For a better experience, please enable JavaScript in your browser before proceeding. It can turn a typical day at work or an enjoyable project into a hassle for its user. If the spark plug is physically damaged, replace it. All fuel supply components must be independently examined to address these difficulties, as discussed in the following sections. The ignition system is essentially a spark plug.