If it still doesnt look clean, it might be time to replace it. How do you know what the best gas-to-oil mixture is the best for your chainsaw? Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Guess its time to pull the carby down and check the diaphragm and mesh. Find the source of the issue and you can easily fix it. myimages[4]="../../../images/top-banner/ez50-banner.jpg" ( 2 cents) the new gas seems to clog small motors Mike. It's 14in bar and chain, with a new chain on the saw. Youll want to start by increasing the idle speed until the engine runs smoothly. If it needs to be cleaned, take care to not damage it by using compressed air or a soft brush. 6. Together we put a lot of effort into the maintenance of our gardens over the last few years, we become obsessed with it. This dirt and debris can build up and create a clog. Also cleaned muffler and replaced spark arrestting screen.All with no luck. If your Stihl saw keeps stopping, there could be several potential causes. All internal or external factors that reduce the supply of combustible air causes bogging down. Re-attach the carburetor cover and test the saw. The consent submitted will only be used for data processing originating from this website. Its starts fine, but if you give it gas it will shut off. Why does my chainsaw stall when gas is given? Align the screws on the carburetor. 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. I tried putting new gas in it and starting it up but it didn't make a difference. I will try to figure out how to get the carb off tomorrow morning. Answered by Patrick, Top 10 Best Chainsaw Bars Tested and Compared for 2023, How does a Chainsaw Carburetor Work? //specify random images below. imagelinks[2]="https://woodmizer.com/us/Sawmill-Blades?utm_source=forestryforum.com&utm_medium=banner&utm_campaign=sawmillblades&utm_term=2022-05-01&utm_content=800x160" So anyhow, I've ran about 25 hours and took it for a tune up. Conclusion: Why Does My Chainsaw Bogs Down When I Give it Gas in 2023? 2023 "Chainsaw Guru". Please loginor register. Go ahead and buy a new fuel filter. } #7. Mix in a premium 2-cycle oil that is ISO-L-EGD and JASO M345 FD certified. 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. Oct 29, 2011. This issue can be fixed with the help of the user manual you received with the chainsaw. Prevent oil from accumulating in the engine. Test your stop switch to make sure that it completely stops the motor. Run the saw in idle and make sure the idle speed is consistent, and then rev it up and listen for any unexpected changes in engine noise. There are three adjustment screws on the carburetor: low-speed (L), high-speed (H), and idling (I). For a better experience, please enable JavaScript in your browser before proceeding. Next, spray a carburetor cleaner into the throat of the carburetor on the side opposite the air filter and throttle linkage. Question: What's the reason for the chainsaw to die under heavy load? Generally, you will find the fuel filter on the fuel line, usually near the carburetor. It's the carburetor's job to regulate the amount of fuel in the cylinder, and it has been preset at the factory to accomplish that task. The effect of air leakage is that it upsets the composition of the air-fuel mixture. myimages[3]="../../../images/top-banner/LX25-FreeShipping.jpg" Trying that is by using Stihl Ultra bottles and pouring a little less but I always have some left over gas in the can. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust. To do this: Loosen each bolt about half way down using flathead screwdriver or small wrench (depending on size). A carb cleaner spray is an excellent tool for eliminating sticky deposits from your jets and reviving your carburetor. . You can have as many as you wish Adjust the main jet by twisting the needle in either direction. var imagelinks=new Array() Even with the tiniest passage, it can make its way towards anything, including a spark arrestor and spark plug. If you have recently bought the saw or it has been sitting for a while and not used, the best option would be to clean the carburetor and set it according to the factory specs. I have a MS250 that's only two years old and has barely been used. Inspect the fuel line condition. Turning the knob will either tighten or loosen the chain, depending on the direction the user turns the knob. This feature is commonly found on modern chainsaws, and is designed to make adjusting the chain tension quick and easy. It's all clean no cracks no discoloration nothing. Make sure to take out the spark plug before removing the filter. Fuel stabilizers are a must-have for any chainsaw owner who fanciesleaving their equipment idle.They help prevent gum formation in fuel tanks. Will start, sound fine, and work for a couple of minutes, until it gets warm. Check the brake band for wear and tear. Stihl carburetors have three adjustment screws. Kilikoba Nashoba 858 subscribers 46K views 7 years ago This video is about likely causes of a Stihl chainsaw engine. No matter how tight the seal on the tank is, replace the gas every three months and use stabilizer. Required fields are marked *. In case it is not the fuel ratio, it might be dirty or clogged air filters. This causes your engines RPMs to increase to a set limit before decreasing. Now that I'm all grown up with a wife and kids of my own, I hope to share all the knowledge I've gained over the years. Next, youll need to gather the right supplies for the job at hand. 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. On the first day the crew used it, it was bogging down. 20,427 satisfied customers. Clogging slows down the engine from in-taking fuel and air, which results in a bog down at full throttle. What it needs is proper maintenance on a daily, weekly, and monthly basis. If your chainsaw starts but does not stay running, the low-speed (L) and idle screw (I) may not be properly set. Remedy this by adjusting the high-speed screw. or a blockage in the mesh strainer in the pump chamber. Most engine problems can be solved with the previously mentioned adjusting procedure. Find the screw to adjust the idle speed. It should be the first thing to check and clean. I do sharpen the chains myself using an Oregon 511A. 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. From falling trees to slicing timber, the chainsaw is a necessity - especially if you are in the lumber industry. First, youll need to pull out your reading glasses and take a look at your chainsaws owners manual. Weather is 30-50 when I'm cutting and I'm trying to run 40:1, 93 only. A thick fuel mixture can cause excessive carbon around the spark plug, which can even kill a chainsaw. 30:1 is recommended mostly for older models. Use a 50:1 gas-to-oil mixture in your 2-cycle Stihl chainsaw. Updated: 00/04/25 Chainsaw starts but dies when I give it gas. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. It has a new spark plug, clean air filter, n Chainsaw bogs down in cut in Chainsaws Have a Stihl 441 that starts and idles fine and even start cutting. Add your pre-measured oil to the container, Add your pre-measured gasoline AFTER (not before) your oil, Seal your fuel container and swirl, not shake, to thoroughly combine the oil and gasoline, Once properly mixed, your gas and oil mixture will be evenly colored with no variegated streaks, Check your owners manual to locate your chainsaws air filter, Your chainsaws air filter should be visible at this point and can be easily removed from its housing with a screwdriver, After removing the air filter, wash it in soapy water and scrub with a soft-bristle brush until clean, Allow your air filter to dry thoroughly before replacing it in your chainsaw, Make sure that your chainsaw is off and cool (Heat isnt your friend here! Once youve made the adjustments, make sure to monitor the performance of your saw over the next few days and readjust if necessary. Richard lives out in the wild with his other half, Diana Richard. The air supply is equally as important as fuel for a combustion engine. Why does the Husqvarna chainsaw bog down at full throttle? 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. Clogging usually occurs due to long working hours. Required fields are marked *. To keep your chainsaw running smoothly, you should service it regularly and keep up scheduled maintenance visits with a reputable, authorized chainsaw service center. Rotate the fuel supply lever and keep it in the on position while you spray the carburetor cleaner. var myimages2=new Array() Remove the carburetor and check it for damage, cleaning it if necessary. Start by sharpening the cutting teeth of the blade first. Clean both of these components if they are dirty. Check that the anti-vibration elements are not damaged, torn, or soft. Another possible cause of a Stihl chainsaw bogging down is a broken or worn chain. 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. Los Angeles, CA 90013 JavaScript is disabled. Other indicators that your chainsaw may be suffering from carburetor troubles are overheating or excessively smoky exhaust. The standard compression reading required for most 2-cycle chainsaw is around 100-110 psi to start. If the air filter is clean, then the spark plug should be cleaned and gap adjusted to the manufacturers specifications. It is recommended to replace the fuel filter every year to ensure optimal performance and avoid any possible issues. Locate all the screws on the carburetor and check if they are all aligned. The new fuel doesn't really clog the carbs. (Read 66824 times) (Read 66824 times) 0 Members and 2 Guests are viewing this topic. . I'm an arborist by profession & a blogger by passion. 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. Furthermore, its possible that the carburetor is not getting the right amount of fuel, so its important to check the fuel lines and adjust the carburetor accordingly. Bog down is mostly experienced on full throttle. The reason for that may be you're using the saw at altitude or the carburetor adjustment has simply slipped. Working outdoors can be such a cathartic experience. The air supply is just as important as a fuel supply in any internal combustion engine. Do not store a dirty chainsaw. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[320,50],'remodelormove_com-box-3','ezslot_6',175,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-box-3-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[320,50],'remodelormove_com-box-3','ezslot_7',175,'0','1'])};__ez_fad_position('div-gpt-ad-remodelormove_com-box-3-0_1');.box-3-multi-175{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:7px!important;margin-left:auto!important;margin-right:auto!important;margin-top:7px!important;max-width:100%!important;min-height:50px;padding:0;text-align:center!important}Lastly, if the air filter is dirty or clogged it will restrict the air flow and cause the saw to lose power. Manage Settings At this point, the battery will reset,, Read More How To Reset Echo 58-Volt Battery ChargerContinue, Clogging of the air filter/fuel line, untidy carburetor and damaged spark plug, etc. Next, you should check the air filter to make sure it is clean and not blocked by dirt or debris. I didn't run straight gas through it and it isn't sized up so I am wanting to dig into the carb myself. You will need to use a file to sharpen your blades monthly or when the debris left from your saw cuts is more dust and fewer wood chips. Furthermore, the arrestor screen that catches the spark at the exhaust port is prone to carbon deposits. It has a new spark plug, clean air filter, n Welcome, Guest. This is usually behind the air filter, but if you have trouble locating it, consult your user manual. We pulled out the carb and opened it up, and the check valve looked perfect and everything was as clean and shiny as you'd expect a basically brand new saw to look. Let the chainsaw cool down if there's excessive smoke release or the chainsaw got heated up. If you don't know about the perfect amount . //specify random images below. Obviously pull the carb and exhaust when you do this. More so, the chainsaw might bog and refuse to run when you give it gas. It's looking a little tricky to me. Correct mixing of fuel ingredients. can cause a chainsaw to bog down when cutting. 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. Use low pressure compressed air, and a stiff paint brush bristle to check them all. How Do You Repair a Chainsaw That Wont Start? However, now it is acting odd. The removal of the carburetor fuel line is very sensitive.Make drawings drawing on the lines connections to allow easy re-assembly. The muffler looks easy enough to remove but I want to check out the carb. A dirty carburetor is likely to cause Chainsaw Bog.In this case, the speed of the chainsaw will dwindle a great deal.Dirt in the spark arrestor or air filter can also cause the chainsaw to bog. In most cases, clogged air and fuel filters and blocked carburetor jets are causing the problem. 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. A carburetor is a part of a combustion motor that mixes air and fuel in a specific ratio for combustion. This blog is written by a group of Garden Tool enthusiasts. By, Read More Chainsaw Too Much Compression: Causes & SolutionContinue, Your email address will not be published. While you are in there, check the spark arrestor screen to make sure it is clear and that there is not any debris clogging it. Following are the must-performed maintenance to prevent unwanted bog down. If the spark arrestor is clogged, the chainsaw may run stall or run rough. Its worth noting that loosening a screw improves the fuel flow rate and enriches the mixture while tightening the screw has the reverse effect. Check for any loosened nuts or screws and retighten if needed. As a result, the fuel drawn by the carburetor reduces, causing the engine to stop running. Check the fuel tank for the correct fuel and oil mixture, filling it up if necessary. This handy guide will cover the common problems that cause bog down and how you can keep it from happening in the future. If the fuel mix is old or has not been adjusted properly to the manufacturers specifications, refresh it or adjust it. Lastly, its time to play mixologist. To remove it you need to depress a small tab and slide the fuel line off. (Even After Sharpening). Step Three. You can have as many as you wish Rotate the saw and file the remaining teeth using the same angle and motions as before. That explains why they run worse after i rebuild them! A rich mixture occurs when you have too much gasoline with the amount of oil in your fuel mixture, resulting in a poorly operating chainsaw. For the spark plug, use a delicate brush, a wire, or a plug spray-on to clean off the thick carbon. Your chainsaws fuel supply system comprises the gasoline tank, fuel filter, fuel lines, and carburetor. When you depress the trigger, a vent on the carburetor opens, allowing more gas to reach the mixing chamber. However, if you decide to clean your carburetor use a thinner to clean the gum buildup.Ensure the important plastic parts are removed due to the thinners ability to dissolve plastics. The first problem is that when the saw is tilted forwards or the chain brake is disengaged it stalls. 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). I guage the rakers and grind them when necessary. This article will help you fix your chainsaw by yourself that starts well but dies just after you push the throttle. Lock the chain brake by pushing the handle forward. on Chainsaws, Started by bkkraft --If you want more backyard tips including recipes, how-tos and more, make sure you subscribe to my youtube channel, Can Chainsaw Chains Be Shortened? You can clean clogged or dirty carburetors with carburetor-specific cleaning solutions that you can purchase at your local chainsaw dealer or auto parts store. Ozito 25.4 cc 305 bar, starts, easily & comes off choke & idles, will rev up on the ground, pick it up off the ground & it dies & stops, Put back on read more. Nearly every weekend you will find us doing small or big jobs or just enjoying our garden. 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. The best way to clean the spark arrestor screen is to unplug the spark plug wire and use a metal brush. If the chainsaw continues to stall, the issue could be with the low-speed and idle screws, which should be adjusted. Look over all cables, connections, nuts, and screws to ensure that they are not damaged and need replacement. #1. If you experience this scenario, the orientation of your carburetor has likely changed. 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. If its clogged, replace it with a clean one. Save my name, email, and website in this browser for the next time I comment. Sounds like a blocked passage somewhere to me. Adjust the high-speed screw to remedy this issue. Make sure to take out the spark plug before removing the filter. If your chainsaws carburetor becomes clogged with dirt and debris, airflow is restricted and the chainsaws engine suffers. To adjust the tension on the chain, the user simply turns a knob located near the drive sprocket. To unclog the spark arrestor, remove it and clean it with a wire brush. +1-213-221-0119, By using this website I agree with the Disclaimer. Now take and post a picture so we can see the exhaust side of the piston. We are compensated for referring traffic and business to Amazon and other companies linked to on this site. If the spark plug is physically damaged, replace it. The best/easiest way to do this is to poor some motor oil on the outside of the crankshaft and then also fill the engine with motor oil. var ry=Math.floor(Math.random()*myimages.length) Adjust the idle speed. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. 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. 4. The gasoline filter can be found at the bottom of your fuel tank. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'remodelormove_com-medrectangle-3','ezslot_1',155,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-medrectangle-3-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'remodelormove_com-medrectangle-3','ezslot_2',155,'0','1'])};__ez_fad_position('div-gpt-ad-remodelormove_com-medrectangle-3-0_1');.medrectangle-3-multi-155{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:7px!important;margin-left:auto!important;margin-right:auto!important;margin-top:7px!important;max-width:100%!important;min-height:250px;padding:0;text-align:center!important}You should also check the chain tension and sharpness and consider replacing the chain if that is necessary. The L screw controls how much fuel enters the carburetor at low speed, whereas the H screw controls how much gasoline flows into the carb at high speed. Move the piston up in bore a bit more so we can see the piston below the ring and turn your flash off. Continue with Recommended Cookies. Frustrating, right? You should also check the spark plug and air filter to make sure that they are not clogged or damaged. Maintenance is the key to avoiding all that. When your saw blade starts to dull, your blade will start producing powder, rather than chips. Your email address will not be published. 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. Madsens Shop & Supply, Inc.: Carburetor Adjustment on Pro Saws, TEK Indoor Environmental: Stihl Chainsaw Carburetor Adjustment, Beautiful houseplants that also repel mosquitoes, cockroaches and other pests, The Tools for the Adjustment of the Carburetor on Craftsman Chainsaws. Affiliate. This will keep your chain in place for the next steps. ). Follow these simple steps to become a master fuel mixologist: You can now correctly mix the gasoline and oil needed for your chainsaw, so lets move on to other issues that can arise and cause a bogged-down chainsaw. Besides causing poor performance in the cut, the fuel that doesn't burn produces smoke that fouls the spark plug and air filter, which compounds performance problems. Once youve reassembled the chainsaw and replaced the air filter, check for any other issues, like clogged fuel cap vent, and make sure all the screws have been secured correctly. I have cleaned the air filter, replaced the fuel filter to no effect. Page created in 1.341 seconds with 39 queries. All help is appreciated. If the spark plug is fouled, it means that it is unable to ignite the fuel being provided to the cylinder. document.write('') Here are the solutions for common reasons why chainsaw bogs down after giving it gas - 1. Check cooling fins on the cylinder and clean if needed. To ensure any residue is removed, spray the inside of the carburetor with carburetor cleaner and scrub with a stiff brush. Yea, its not rocket science but reality. Your chainsaw bogging down is a common issue that youll face when wielding one, and it can quite quickly throw a knot in your woodworking projects. Bog down can also occur in the case of a dirty air filter, spark arrestor, or carburetor. A clean and fixed carburetor is key to achieving full throttle performance. When a clog occurs, your engine will not get enough air to operate effectively. Even if you are a novice chainsaw operator, these spark plugsshould be updated at least once a year. Ok I got it posted. Get a carburetor repair kit before you begin clearing the blocked jets. Take them out and clean them using a delicate brush. myimages[2]="../../../images/top-banner/BladesFreeShip.jpg" Why does my Stihl chainsaw bog down when I give it gas? Why does my Chainsaw Bog down when I Pull the Trigger? Theres a myriad of issues that can lead to a bogged-down chainsaw, and most of them have something to do with your chainsaws combustion engines ability to access fuel or air amply.