The carburetor has three adjustment screws marked on it. 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. The speed would be perfect, and there would be no unusual sound when the screws are properly aligned. This issue can be fixed with the help of the user manual you received with the chainsaw. The reason could be that you are using the Stihl saw at an altitude, or the carburetor adjustment might have slipped and required fixing. When the high-speed screw on the carburetor is open too far, an excess of fuel enters the combustion chamber and not all of it ignites. This article will help you fix your chainsaw by yourself that starts well but dies just after you push the throttle. You will also reduce kickbacks and increase the overall safety of operating your chainsaw. A new chainsaw has some protocols to follow. Why does my chainsaw stall when gas is given? 4. The Basics Explained, Can a Concrete Chainsaw Cut Through Rebar? Poor chainsaw maintenance is one of the lead causes of bogging. The muffler looks easy enough to remove but I want to check out the carb. If the problem persists, inspect the fuel lines and ignition system. If your chain starts to spin, loosen the idler screw until it stops. Spark arrestor is usually placed behind muffler, so locating it is not that hard. Now, remove the filter and clean the dust buildup using a brush. What Would Cause a STIHL Trimmer to Not Start? The air filter in your chainsaw protects your chainsaw from dirt and debris by filtering it out before it can reach the engine. --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? Hence, many people complain- chainsaw bogs down when I give it gas . If these steps do not solve the problem, you should take the chainsaw to a professional for servicing or further diagnosis. The dirt in the air filters can often cause the chainsaw to stall. Furthermore, the arrestor screen that catches the spark at the exhaust port is prone to carbon deposits. A couple of the small holes were plugged with what seemed like excessive oil, but once I blew on it it was clear. Remove the muffler. The first problem is that when the saw is tilted forwards or the chain brake is disengaged it stalls. imagelinks[1]="http://www.ezboardwalk.com/" 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. A clean and fixed carburetor is key to achieving full throttle performance. Find the source of the issue and you can easily fix it. When your saw blade starts to dull, your blade will start producing powder, rather than chips. Anyone have any suggestions? Stihl carburetors have three adjustment screws. Inspect the fuel line condition. if (ry==0) Or maybe gas varnish in the screen filter at the base of the metering needle. Another plausible explanation for the stalling is attributed to the percentage of ethanol in the fuel.Ethanol readily vaporizes and combines with water in the air to form water.This water stops combustion which is necessary for running the motor.Experts counsel that fuel containing up to 10% ethanol has a tendency to separate varnishes from the gas, resulting in accumulation in fuel lines and tank.The residue counters combustion in the carburetor. By properly troubleshooting and addressing any potential causes, you can prevent stalling or restarting problems with your Stihl saw. This may be one of the least anticipated causes of the problem, but it occurs in several cases. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust. What it needs is proper maintenance on a daily, weekly, and monthly basis. If you don't keep the blade oiler reservoir filled, you will have dulled blades, damaged bars, and generally poor performance. Why does the chainsaw bog down at full throttle? It has the exact ratio requirement of gas and oil for your specific model. Any factor that might affect supply can cause the chainsaw to bog down. It is possible that your Stihl chainsaw is dying when you give it gas if the carburetor, spark plug, chain, or air filter is malfunctioning. Remove the carburetor and check it for damage, cleaning it if necessary. L and H on your chainsaw. This is partly due to clogged filters resulting from long working hours and less air supply to the carburetor (which will be discussed later). ), 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. How did you get the carb off? My name is Chris Ross. Heres a quick rundown of how to do just that: Keeping your chainsaw chain sharpened will enable you to keep cutting with precision and efficiency. When not constructing or remodeling X-Ray Rooms, Cardiovascular Labs, and Pharmacies, you can find him at home with wife and two daughters. Turn your chainsaws bar to ensure even wear and tear. For a better experience, please enable JavaScript in your browser before proceeding. I do sharpen the chains myself using an Oregon 511A. After this, check the air filter and carburetor for dirt and debris. 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. Its an essential step in properly maintaining your chainsaw to check and adjust the chain tension. Read more about this in, "This is the Type of Gas to Use in a String Trimmer". How do you know what the best gas-to-oil mixture is the best for your chainsaw? 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. Test your stop switch to make sure that it completely stops the motor. The chainsaw bogs down will occur when your engine is starved of enough fuel or when there is termination in the connection between the carburetor and the engine. I tried putting new gas in it and starting it up but it didn't make a difference. The one that is often damaged by compressed air is the one inside the high speed nozzle. Other indicators that your chainsaw may be suffering from carburetor troubles are overheating or excessively smoky exhaust. They are Sthil chains. The air supply is just as important as a fuel supply in any internal combustion engine. Top 11 Best Chainsaw Sharpener Tested for Sharpening 2023, How do Chainsaw Chaps Work? Re: Chainsaw bogs on full . If your chainsaw doesn't start, adjust the carburetor screws till it doesn't bog down. Tighten the idle screw with a screwdriver to fix this and see whether the engine RPMs rise. How did you get the carb off? I doubt it has more than four or five hours on it. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); Your email address will not be published. or a blockage in the mesh strainer in the pump chamber. var imagelinks2=new Array() This will keep your chain in place for the next steps. Set the idle screw to the point just before the chain starts spinning and adjust the low-speed midway between the the two points at which the engine starts to die. Detailed Answer. Re: Stihl MS 180C running problems, bogging down, fuel starvation?? Guess its time to pull the carby down and check the diaphragm and mesh. The remedy is to close the screw, but closing it too far is dangerous for the engine. It runs fine at all other times, cuts well and has good power. If the chainsaw continues to stall, the issue could be with the low-speed and idle screws, which should be adjusted. In most cases, clogged air and fuel filters and blocked carburetor jets are causing the problem. This is usually behind the air filter, but if you have trouble locating it, consult your user manual. Sometimes the L adjustment is insufficient, and you must tweak your fuel delivery components, specifically the carburetor and filters. Also, use a clean cloth and some carburetor cleaner to wipe down the inside of the carburetor. Find the screw to adjust the idle speed. So anyhow, I've ran about 25 hours and took it for a tune up. When the chainsaw is unable to hit full power during the full throttle, it's a good sign that your chainsaw is bogging down. All help is appreciated. A carburetor is a part of a combustion motor that mixes air and fuel in a specific ratio for combustion. 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. Required fields are marked *. Secure your chainsaw to maintain stability while working. 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. After checking that, soak the crank seals in motor oil (30w works great) and then give it a go. You can work on it directly using a carburetor adjustment tool. The proper fuel mixture is essential for effective, trouble-free operation. 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. Any of these could be a contributor to a chainsaw that's bogging down. We like to help other people maintaining their garden and find cool products to write about. If your chainsaw is bogging down when you press the throttle, it can be a sure sign of an incorrect gas-to-oil ratio. There are three adjustment screws on the carburetor: low-speed (L), high-speed (H), and idling (I). The saw has been well used over the years (1998) and not really well looked after. Additionally, inspect the air vents on the engine to make sure they are not blocked by leaves or debris.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'remodelormove_com-banner-1','ezslot_4',157,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-banner-1-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'remodelormove_com-banner-1','ezslot_5',157,'0','1'])};__ez_fad_position('div-gpt-ad-remodelormove_com-banner-1-0_1');.banner-1-multi-157{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}. Always clean the outside of your chainsaw after using it to remove any dust or debris that may be present. After reassembling the carburetor make sure the gaskets and seals are airtight. If it still doesnt look clean, it might be time to replace it. Chain filing isnt a difficult task and is crucial in maintaining your chainsaw. 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. Next, youll need to gather the right supplies for the job at hand. Tips from a Professional, Chainsaw Starts but Wont Idle. It bogs down it seems and stalls out when I open the throttle. Dirty filters are the main problem. So I am just wondering how to go about pulling the carb off the easiest way to check out the jets. Then it loses power when cutting. The inability to reach full power during a full-throttle trigger is also a sign of bogging down.Remedy this by adjusting the high-speed screw. Chain-saw requires constant maintenance to be efficient. Be sure to check your models owners manual for the exact location of the fuel filter as it can vary from model to model. Finally, check the choke. Fuel stabilizers are a must-have for any chainsaw owner who fanciesleaving their equipment idle.They help prevent gum formation in fuel tanks. . Tips from a Professional. ALL RIGHTS RESERVED! If the spark plug is fouled, it means that it is unable to ignite the fuel being provided to the cylinder. */ If youre finding your chainsaw to be bogging down, check the issues mentioned above to see if you can save yourself a little time and money. Where are these located and on what carbs? First, disconnect the spark plug wire and turn the engine off. I would suggest that in the first instance the carburetor settings are checked. To unclog the spark arrestor, remove it and clean it with a wire brush. Suppose that your chainsaws fuel mixture is correct, and youre still experiencing a lag in performance. 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. Take them out and clean them using a delicate brush. As a landscape builder, he helped establish two gardening companies. Home Why Is My Chainsaw Bogging Down? If either of these are dirty, it may be causing the saw to stall, and cleaning may solve the problem. myimages[3]="../../../images/top-banner/LX25-FreeShipping.jpg" Firstly, what instigates the chainsaw Bog down? This handy guide will cover the common problems that cause bog down and how you can keep it from happening in the future. They include inspection of spark plugs, filters, and carburetor adjustment.Sparkplugs are a litmus test to the fuel economy of your chainsaw.A sooty plug is an indication of a rich fuel mixture resulting in frequent misfiring. If your chainsaw bogs down after pulling the throttle, the air/fuel delivery system needs to be examined. The majority of these steps are listed above in the daily maintenance list, but one is of top priority: Chainsaws require maintenance to stay at the top of their game. I guage the rakers and grind them when necessary. For the spark plug, use a delicate brush, a wire, or a plug spray-on to clean off the thick carbon. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'remodelormove_com-leader-4','ezslot_20',165,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-leader-4-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'remodelormove_com-leader-4','ezslot_21',165,'0','1'])};__ez_fad_position('div-gpt-ad-remodelormove_com-leader-4-0_1');.leader-4-multi-165{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}Adjusting the carburetor on a Craftsman chainsaw is a relatively simple process, but there are several steps youll need to follow. I'm having trouble with my Stihl MS180 C-BE chainsaw. Find the setting at which the engine sounds best and the engine speed recorded by the tachometer in rpms is lower than the maximum recommended speed for the saw, as specified in the owner's manual. Follow the re-assembly instructions which are usually supplied with the carburetor kit (Assuming all the jet screws and small parts are accounted for).Alternatively, you can use professional help.Usually, after thorough cleaning of the carburetor and filters, your stalling issues should disappear.However, if the problem persists you may need to enlist the help of a professional. Adjusting the H screw will help achieve optimal performance. This is crucial since an idle chain is extremely harmful. The use of stale ethanol-blended fuel, which creates sticky white deposits over time, is the most typical source of such clogs. Kilikoba Nashoba 858 subscribers 46K views 7 years ago This video is about likely causes of a Stihl chainsaw engine. Aside from the screw setting, you need to check and make sure that the spark plug is in prime working condition. Prevent oil from accumulating in the engine. Loosening the screw, on the other hand, enriches the mixture with gasoline and lowers the RPMs to a set limit. 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. In most models, it can easily be located by taking off the top cover. If needed, purchase the tools from a hardware store and make sure you have personal protective equipment (goggles, gloves, etc. ) When a chainsaw bogs down when accelerating, it typically means the engine is not receiving enough fuel or air. 0 Members and 1 Guest are viewing this topic. If the spark arrestor screen has become damaged, you should replace it. The main reason for an ECHO chainsaw to bog down is the dirty spark arrestor. All STIHL gasoline-powered engines can be used with up to a 10% (E10) blend of ethanol in the gasoline/engine oil mix. Thank You for all replies. The effect of air leakage is that it upsets the composition of the air-fuel mixture. imagelinks2[3]="https://www.youtube.com/c/TheForestryForum?sub_confirmation=1" Use a 50:1 gas-to-oil mixture in your 2-cycle Stihl chainsaw. Using compressed air, blow out the inside of the carburetor and around the gasket. 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. /* Don't know how to post a pic of it on here. The new fuel doesn't really clog the carbs. It can turn a typical day at work or an enjoyable project into a hassle for its user. A loose spark plug wire or incorrect gap can also be responsible for a poorly running string trimmer that bogs down. Click to see full answer. myimages[6]="../../../images/top-banner/EZ-junior.jpg" It could even bog down when given gas. imagelinks[6]="http://www.ezboardwalk.com/" It would do the same thing, die when you give it fuel, It would also idle way down when I was adjusting the carb, not from turning the screws all you had to do was just push on it a little and it would almost die. It should be the first thing to check and clean. As a result, the engine runs at too high or too low RPMs. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. Together we put a lot of effort into the maintenance of our gardens over the last few years, we become obsessed with it. Firewood, Heating and Wood Burning Equipment, Lady on ebay selling hundreds of chainsaws. In order to properly access the carburetor and get at its internal components, youll then need to disassemble the carburetor. The issue of chainsaw bog down can be very calamitous, and it oozes a great deal of frustration. Move the piston up in bore a bit more so we can see the piston below the ring and turn your flash off. One of these is not being fed to the chainsaw in the proper ratio. Tuning regulates the flow of fuel through the might be the last resort and for that, always seek professional help. 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. Try to make the right call based on the cost and gravity of the issue. The (I) screw is a butterfly valve that controlsidle RPMs by raising or lowering the flow of the air-fuel mixture. It's 14in bar and chain, with a new chain on the saw. Dealing with a carburetor requires strict guidelines to be followed. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. myimages[1]="../../../images/top-banner/ez50-banner.jpg" Hello, and thanks for visiting my site! I love to write about chainsaw for homeowners and professionals. 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 solution is easy and you can do it within a few minutes. myimages[5]="../../../images/top-banner/cookie-mizer.jpg" I have a MS250 that's only two years old and has barely been used. If the spark plug looks good, check the fuel mix. 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" The reason for that may be you're using the saw at altitude or the carburetor adjustment has simply slipped. Login with username, password and session length, Model 6020-20hp Manual Thomas bandsaw,TC40A 4wd 40 hp New Holland tractor, 450 Norse Winch, Heatmor 400 OWB,YCC 1978-79. +1-213-221-0119, By using this website I agree with the Disclaimer. Chainsaw Vapor Lock. Go ahead and buy a new fuel filter. You must log in or register to reply here. 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. The H side means the high side and its adjustment.It is used to regulate the quantity of fuel that flows through the carburetor during fast paced RPMS.The L side of the chainsaw means the low side and it is used in adjusting the flow of fuel in the carburetor when there is a low RPM. Random Image Link Script- By JavaScript Kit(http://www.javascriptkit.com) Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Lock the chain brake by pushing the handle forward. To check if theres a vapor lock, unscrew the tanks cap and put it back on again. The fuel lines or ignition system may have beenaffected if the problems continue despite adjustment. It requires an 8mm or 5/16" nut driver or wrench. 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. For instance: It is impossible not to lose power when the firewood chainsaw is being used constantly. 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. /* The Forestry Forum is sponsored in part by: If there is too much gasoline in relation to the amount of oil used, this is known as a rich mixture and hence caused the chainsaw to run in an irregular manner. JavaScript is disabled. Allow the cleaner to sit for five to 10 minutes and then wipe away with a cloth. I will try to figure out how to get the carb off tomorrow morning. Bog down is mostly experienced on full throttle. If the spark arrestor is clogged, the chainsaw may run stall or run rough. var ry=Math.floor(Math.random()*myimages.length) In my experience, there are two possible causes of this 'bogging down of the engine' and to resolve this the manufacturer's manual is required or alternatively a little internet investigation. You will need a round file that matches the diameter of your cutters, a flat file, a file guide, and a depth-gauge guide. Adjusting the idle screw, for instance, is a corrective measure for a chainsaw stalling when idle. Following are the must-performed maintenance to prevent unwanted bog down. We may earn a small commission from affiliate links and paid advertisements. I have never worked on anything this small. Make sure that its leveled and does not tilt. First, remove the old fuel line from the fuel tank. Lastly, you should clean the air filter and replace it if necessary. How to Adjust the Carburetor on an Eager Beaver Chainsaw. //-->,