Align the screws on the carburetor. document.write('') These screws are in charge of regulating the fuel flow to the carburetor under varied load circumstances. Using compressed air, blow out the inside of the carburetor and around the gasket. Use a 50:1 gas-to-oil mixture in your 2-cycle Stihl chainsaw. If it needs to be cleaned, take care to not damage it by using compressed air or a soft brush. To keep your chainsaw running smoothly, you should service it regularly and keep up scheduled maintenance visits with a reputable, authorized chainsaw service center. Check that the anti-vibration elements are not damaged, torn, or soft. Re-attach the carburetor cover and test the saw. The first step is to make sure that your chainsaw has enough fuel. Los Angeles, CA 90013 3. } Just took off the muffler and it all looks good. //specify corresponding links below Start the chainsaw for a few seconds to make sure the carburetor is functioning correctly.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[320,50],'remodelormove_com-large-leaderboard-2','ezslot_10',158,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-large-leaderboard-2-0'); To unclog a chainsaw carburetor, youll need to thoroughly clean the carburetor and replace the air filter. To carry out the low-speed screw adjustment, follow these steps: The chain may begin to rotate because the mixture is lean enough to engage the clutch after the low-speed adjustment. . 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. Why doesmy Chainsaw Startand then Stop. Aside from that, there are a number of other causes that can cause a bog which are as follow: The motor of a chainsaw is a combustion system that depends on an adequate ratio of gas, oil, and air. If your chainsaw is bogging down when you press the throttle, it can be a sure sign of an incorrect gas-to-oil ratio. How Do You Repair a Chainsaw That Wont Start? The proper fuel mixture is essential for effective, trouble-free operation. A carburetor is a part of a combustion motor that mixes air and fuel in a specific ratio for combustion. The standard compression reading required for most 2-cycle chainsaw is around 100-110 psi to start. 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. The solution is easy and you can do it within a few minutes. Finally, replace the air filter on the chainsaw. Taking all of these potential issues into account and fixing them as needed should help to correct the issue and get your chainsaw running properly. Ok I think I can share the pics from this site. piston and cylinder is clean. My name is Ben, and growing up, I practically lived in my parents' backyard. It has a new spark plug, clean air filter, n Welcome, Guest. It is experienced during welding, idling, or full throttle. 20,427 satisfied customers. If its clogged, replace it with a clean one. Apr 16, 2009. Air Filter Issues. 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. All internal or external factors that reduce the supply of combustible air causes bogging down. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust. I have cleaned the air filter, replaced the fuel filter to no effect. It runs fine at all other times, cuts well and has good power. Even with the tiniest passage, it can make its way towards anything, including a spark arrestor and spark plug. You will also reduce kickbacks and increase the overall safety of operating your chainsaw. If the problem persists, inspect the fuel lines and ignition system. Check the tension and condition of your chain. Together we put a lot of effort into the maintenance of our gardens over the last few years, we become obsessed with it. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); Your email address will not be published. A restricted fuel flow will reduce the power of your Stihl chainsaw. It may not display this or other websites correctly. You are using an out of date browser. Also, use a clean cloth and some carburetor cleaner to wipe down the inside of the carburetor. myimages[1]="../../../images/top-banner/ez50-banner.jpg" The majority of chainsaws operate on one of the three following gas-to-oil mixtures: If you have already mistakenly filled your chainsaw with the wrong fuel mixture, you will need to drain the incorrect fuel and replace it with the right mix. Misaligned screws can cause bogging down, smoking in the chainsaw, and lower performance efficiency. var ry=Math.floor(Math.random()*myimages.length) Outside of family, He loves grilling and barbequing on his Big Green Egg and Blackstone Griddle, as well as working on projects around the house. The issue of chainsaw bog down can be very calamitous, and it oozes a great deal of frustration. For example, if the carburetor is clogged, not tuned correctly, or is contaminated, it may not be metering the right amount of fuel. Thanks for the replies; I'll try out these suggestions. The saw also won't operate well at speed if the air filter or spark arrestor or carburetor are dirty. Cant get a good picture becouse of the glare of the piston. Updated: 00/04/25 It will start up with some work, but it idles for a couple seconds then dies most of the time, and when it doesn't die on its own, it dies when I try to give it any gas. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust. The engine should start by now. Started by ellinghamso Why does the Husqvarna chainsaw bog down at full throttle? Hence, many people complain- chainsaw bogs down when I give it gas . If the spark plug is fouled, it means that it is unable to ignite the fuel being provided to the cylinder. Bogging down is a universally hated issue by everyone and anyone who uses a chainsaw. Make sure to take out the spark plug before removing the filter. If the spark plug is physically damaged, replace it. Fuel stabilizers are a must-have for any chainsaw owner who fanciesleaving their equipment idle.They help prevent gum formation in fuel tanks. #1. Why does my chainsaw stall when gas is given? But soon loses power and bogs down. Make sure to properly lubricate your chain with chain oil and check the compression in the cylinder. Nearly every weekend you will find us doing small or big jobs or just enjoying our garden. random_imglink() Wash it in soapy water with a soft-bristle brush. Even without an incident of stalling, it is important to carry out regular repairs. If the plug checks out, try removing it and spraying it with aerosol-based cleaner. myimages[4]="../../../images/top-banner/ez50-banner.jpg" That explains why they run worse after i rebuild them! Next, check the spark plug to make sure it is clean and properly connected. Stalling is a symptom of a complication in the chain-saw. Answer: Yes, a chainsaw can bog down if gas is supplied to it. This causes your engines RPMs to increase to a set limit before decreasing. ry=1 Maintenance is the key to avoiding all that. When you depress the trigger, a vent on the carburetor opens, allowing more gas to reach the mixing chamber. Check, clean, and replace (if necessary) the air filter. Tips from a Professional. Any of these could be a contributor to a chainsaw that's bogging down. After cleaning the air filter and spark arrestor, you should fill the tank, start the saw and let it warm up for a few minutes before adjusting the carburetor. New Husqvarna 550XP had to be reprogrammed. 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. It's a small screen you can simply pull out after removing the muffler cover. There are many factors that cause a bog down, but mostly it is the carburetor orientation or blockage. Top 11 Best Chainsaw Sharpener Tested for Sharpening 2023, How do Chainsaw Chaps Work? Kilikoba Nashoba 858 subscribers 46K views 7 years ago This video is about likely causes of a Stihl chainsaw engine. First and foremost, you should check that you are using the correct fuel and oil mixture for your chainsaw. The Author The dream of everyone in the lumbering field is to have a powerful and efficient chainsaw devoid of mechanical faults. Remove the air filter from its housing using a screwdriver. (Even After Sharpening). Yea, its not rocket science but reality. A new chainsaw has some protocols to follow. Once youve made the adjustments, make sure to monitor the performance of your saw over the next few days and readjust if necessary. myimages2[3]="../../../images/top-banner/behindtheforum.jpg" I took it to the shop for repair, thinking it was the carb but they told me I ran straight gas through it and seized it up. This article thus covers all causes and solutions to why does my chainsaw bogs down when I give it gas problem below: In a chainsaw both fuel starvation or termination of the connection between carburetor and engine can lead to a bog down. There is no hiding from dirt. An incorrect mixture is also known as a rich mixture which can be caused when there is too much gas as compared to the oil. When your saw blade starts to dull, your blade will start producing powder, rather than chips. Or maybe gas varnish in the screen filter at the base of the metering needle. First, remove the old fuel line from the fuel tank. The engine needs a precise mixture of air and fuel to run efficiently, and when the ratio is off, it can bog down. The L screw, for example, controls the gasoline entering the carburetor at low/idle RPMs, whereas the H screw regulates the fuel flow at higher RPMs or wide-open throttle (WOT). This can be done with a vise, clamps, or any type of fastener that will stabilize your chainsaw. Ok I got it posted. A Detailed Guide, What Size Chainsaw Do I Need in 2023? Use low pressure compressed air, and a stiff paint brush bristle to check them all. imagelinks2[2]="https://www.youtube.com/c/TheForestryForum?sub_confirmation=1" Aside from the screw setting, you need to check and make sure that the spark plug is in prime working condition. Jun 16, 2006. JavaScript is disabled. The most common causes of a chainsaw bogging down include: Incorrect fuel mixture Dirty carburetor Clogged air filter Dirty fuel filter or fuel lines A combustion system depends on a proper mix of gas, oil, and air. Additionally, if the air filter is dirty or blocked, that can also lead to a bogging issue. I love to write about chainsaw for homeowners and professionals. You will need to position your file depth gauge so that the arrows are pointing toward the nose of the chainsaw bar. (3 Common Causes). If a chainsaw is bogging down when it is throttled, this indicates that the gasoline to oil ratio supplied to the saw has been incorrect. /* We may earn a small commission from affiliate links and paid advertisements. +1-213-221-0119, By using this website I agree with the Disclaimer. There are three adjustment screws on the carburetor: low-speed (L), high-speed (H), and idling (I). When the L or idle screws are not properly set, the idle RPMs fall too low, causing the engine to stalland eventually stop. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. Suppose that your chainsaws fuel mixture is correct, and youre still experiencing a lag in performance. Answered by Patrick, Top 10 Best Chainsaw Bars Tested and Compared for 2023, How does a Chainsaw Carburetor Work? Most Craftsman models have either a standard Walbro or a Zama carburetor. Remove the Cutting Bar - This is probably one of the easiest steps in taking your chainsaw apart because there are only two bolts that need to be loosened before removing the bar completely. Dirt in the air filters This is one of the biggest culprits when dealing with chainsaw bogging down. Turning the knob will either tighten or loosen the chain, depending on the direction the user turns the knob. Re: Chainsaw bogs on full throttle . And these issues can be solved if the problem is identified. Random Image Link Script- By JavaScript Kit(http://www.javascriptkit.com) How did you get the carb off? Find the screw to adjust the idle speed. Clogging usually occurs due to long working hours. These are the low-speed screw (L), the idle screw (I), and the high-speed screw (H). LancelotLawns said: I bought a stihl bg85 blower/vacuum two days ago. First, be sure to read your chainsaws manual to determine whether you need specialized tools to disassemble the carburetor. If you experience this scenario, the orientation of your carburetor has likely changed. If your chainsaw starts but does not stay running, the low-speed (L) and idle screw (I) may not be properly set. When I remove the cover (13), I find the upper surface of the filter (2) heavily contaminated (this is an aftermarket eBay filter, perhaps it is not sealing properly? If the gas is supplied to the chainsaw then the filters can clog easily. We also recommend that if a unit will be left unused for more than 30 days that it be stored "dry". It did sit with gas in it for a while, but there are no visible signs of any damage to the carb as a result. Required fields are marked *. I have replaced the spark plug (properly gapped), rebuilt the carb, replaced the fuel line and the fuel filter, cleaned out the chain brake and the clutch and cleaned the fuel tank air pressure stabilizing valve. Home Why Is My Chainsaw Bogging Down? Clean or replace filters located in the fuel tank of your chain saw. Try to make the right call based on the cost and gravity of the issue. imagelinks[1]="http://www.ezboardwalk.com/" I take off everything can come off. You can follow these simple steps to remove and clean your chainsaws air filter: You should note that if your air filter continues to look dirty after cleaning and drying, it is time to fully replace the air filter with a new unit. If your chainsaw doesn't start, adjust the carburetor screws till it doesn't bog down. Dont forget that a maintained chainsaw is a working chainsaw! One of these is not being fed to the chainsaw in the proper ratio. For that you require a carburetor cleaner. If you experience low compression, pull the muffler and check the piston and cylinder for, Read More How Much Compression Should a Chainsaw HaveContinue, Collect a new fuel line, a pair of pliers, and a screwdriver. First, youll need to pull out your reading glasses and take a look at your chainsaws owners manual. Over 200+ free JavaScripts here! Register today and take advantage of membership benefits. Let the chainsaw cool down if there's excessive smoke release or the chainsaw got heated up. Dirty filters are the main problem. He tests chainsaws based on 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. Mix in a premium 2-cycle oil that is ISO-L-EGD and JASO M345 FD certified. Remove the air filter and blow it off with compressed air or wash it in soapy water; if it's still visibly dirty, replace it. Replacement of carburetor is the best option if you have an old chainsaw.This is because the diaphragm gets hard making it hard to crank. Your chainsaws fuel supply system comprises the gasoline tank, fuel filter, fuel lines, and carburetor. ), Using a specialty tool called a scrench or a combination wrench, loosen the bar nuts holding the clutch cover in place, Tighten the chain tensioning screw using your combination wrench or scrench while raising the tip of the bar and, Continue to tighten the chain until there is no slack on the underside of the bar, but it can still be freely pulled by hand, Tighten the bar nuts, return the clutch cover to its rightful place, and ensure that the bar is secure. Just not sure what I am doing. Proceed with adjusting the carburetor adjustment screws to fix a chainsaw that wont start. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust . A well-maintained chain-saw seldom stalls. Other indicators that your chainsaw may be suffering from carburetor troubles are overheating or excessively smoky exhaust. I'm an arborist by profession & a blogger by passion. Where are these located and on what carbs? Classifieds - Engine/Transmission/Transfer Case, BJ42 | FJ43 | BJ44 | FJ45 | FJ45LV | HJ47, North American Clubhouses - Central Region, CA.AB- Rocky Mountain Land Cruiser Association, CO/WY- Horsetooth 4 Wheelers Cruiser Club, TX- Lone Star Land Cruisers - Austin Chapter, TX- The White Trash of the Elwood Chapter, CA.BC- Okanagan-Similkameen Land Cruisers, NV- Battle Born Cruisers of Northern Nevada, Vendors: Accessories - Electronics - Recovery, sthil pics pictures by naturalite - Photobucket, http://s820.photobucket.com/albums/zz130/naturalite/sthil pics/. I just worked on my grandpa's ms 192t. */ All small holes free of residue. Check for any fuel leaks from the motor, fuel tank, or fuel lines. Move the piston up in bore a bit more so we can see the piston below the ring and turn your flash off. Oct 29, 2011. */ A thick fuel mixture can cause excessive carbon around the spark plug, which can even kill a chainsaw. So, lesser air is supplied to the carburetor and the saw bogs down. ( 2 cents) the new gas seems to clog small motors Mike. Carb. Consider cleaning your carburetor and air/fuel filters if the problem persists. The new fuel doesn't really clog the carbs. What causes a chainsaw to bog down when accelerating? Clean both of these components if they are dirty. With the carb apart, make sure all the passages are clear. Find the source of the issue and you can easily fix it. 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. #7. Because of continuous firing, the spark plugs electrodes become damaged or acquire carbon deposits, reducing spark quality. If needed, purchase the tools from a hardware store and make sure you have personal protective equipment (goggles, gloves, etc. ) It is responsible for mixing fuel and supplying it to the engine. There are a number of issues to check in a sequence as why a mini chainsaw would bog at full throttle. My name is Chris Ross. If the spark plug looks good, check the fuel mix. I have a MS250 that's only two years old and has barely been used. If any part of that ratio is off (as previously mentioned), your chainsaw will experience a lag in performance. Stihl Chainsaw Bog Down and Fix Pilot View Productions 4.54K subscribers Subscribe 11K views 2 years ago PILOT MOUNTAIN Does your Stihl or other brand chainsaw bog down and refuse. Stihl chainsaw engine ( motor ) bogging down things to check first. Check the fuel hose, famous for cracking. Start by identifying the carburetor on your saw. The spark arrestor is a small screen that prevents the engine from emitting sparks. The removal of the carburetor fuel line is very sensitive.Make drawings drawing on the lines connections to allow easy re-assembly. The Job of the Carburetor One controls the fuel mixture when the engine is idling, one controls it when the engine is operating at low speed and one is for high-speed fuel control. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust. On the High speed setting ensure that you do not have it running to lean (MAX RPM) I usually suggest max RPM (once warmed up) then turn it out until it diesels and then 1/8 turn in (leaner) . random_imglink2() If your Stihl saw keeps stopping, there could be several potential causes. Make sure to take out the spark plug before removing the filter. Next, check the spark plug to make sure it is clean and properly connected. I think I am having the same problem with mine. How to Hang a Chainsaw to keep it Safe and Protected in 2023? I took it to the shop for repair, thinking it was the carb but they told me I ran straight gas through it and seized it up. If it still doesnt look clean, it might be time to replace it. Adjust the idle speed. I have never worked on anything this small. Tuning regulates the flow of fuel through the might be the last resort and for that, always seek professional help. Test your stop switch to make sure that it completely stops the motor. To adjust the tension on the chain, the user simply turns a knob located near the drive sprocket. Replace it if the quality has deteriorated. I told them that I ran Polaris gold synthetic in it, which I used to use in my drag bike years ago, service manager says stihl says that that is an unacceptable oil. Adjusting the H screw will help achieve optimal performance. You can have as many as you wish ). 2023 "Chainsaw Guru". By: Author Olin Wade (Remodel or Move Stuff). Author Topic: Stihl MS 180C running problems, bogging down, fuel starvation?? function random_imglink(){ Required fields are marked *. no never loaned it out. Your email address will not be published. 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. In most models, it can easily be located by taking off the top cover. Guess its time to pull the carby down and check the diaphragm and mesh. Read more about this in, "This is the Type of Gas to Use in a String Trimmer". There are several factors may make your saw not work properly. Burnt plugs could mean the fuel combustion is too high or high ethanol concentration.To cure this, replace the sooty plug with a new one to prevent misfiring when cutting firewood.Ensure you adjust the carburetor to reduce the amount of gas used. I'm having trouble with my Stihl MS180 C-BE chainsaw. The fuel lines or ignition system may have beenaffected if the problems continue despite adjustment. Any factor that might affect supply can cause the chainsaw to bog down. To sharpen the cutting teeth on your chainsaw chain, follow these easy steps: If you are not comfortable sharpening your own chains, be sure to take your chainsaw to a reputable service provider and have it professionally done. You cannot mix oil and gas directly in your chainsaws fuel tank and will need an empty, leak-proof fuel container that is just slightly larger than the volume of oil and gas being mixed. Check the spark plug as well to examine the ignition system. Firewood, Heating and Wood Burning Equipment, Lady on ebay selling hundreds of chainsaws. Generally, you will find the fuel filter on the fuel line, usually near the carburetor. Question: What's the reason for the chainsaw to die under heavy load? The first problem is that when the saw is tilted forwards or the chain brake is disengaged it stalls. In case you have lost it, the majority of chainsaws follow the following gas: oil ratio. If you need, Read More Stihl chainsaw break inContinue, Carbon build-up in cylinder & piston, bad needle bearing, overused starter spring, oil in the starter system, old or bad fuel, etc can cause too much compression in Chainsaws. Correct mixing of fuel ingredients. Trying that is by using Stihl Ultra bottles and pouring a little less but I always have some left over gas in the can. However, now it is acting odd. When a screw (e.g., anL screw) is tightened, the fuel flow to the carburetor is restricted, causing the mixture to be lean. It can turn a typical day at work or an enjoyable project into a hassle for its user. Maintenance is the key to sustenance. When a clog occurs, your engine will not get enough air to operate effectively. Remove the filter from the tanks bottom and clean the stale gasoline deposits from the filters jets with a metal wire. /* The effect of air leakage is that it upsets the composition of the air-fuel mixture. If user's chainsaw is bogging down than this is often a sign of improper gas-to-oil ratio. Don't know how to post a pic of it on here. Something may be amiss in the low or high speed circuit of the carb.
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