Ben has a bachelors degree in construction engineering. Chainsaw starts but dies when I give it gas. (Even After Sharpening). //specify random images below. Use low pressure compressed air, and a stiff paint brush bristle to check them all. . Bog down is mostly experienced on full throttle. They wrote it up as I ran straight gas through it and seized it. I didn't run straight gas through it and it isn't sized up so I am wanting to dig into the carb myself. Chain filing isnt a difficult task and is crucial in maintaining your chainsaw. Still, if you feel that you can do so yourself, you can watch this YouTube tutorial here. Bogging down is a universally hated issue by everyone and anyone who uses a chainsaw. Most Craftsman models have either a standard Walbro or a Zama carburetor. 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 a chainsaw bogs down when accelerating, it typically means the engine is not receiving enough fuel or air. Re-attach the carburetor cover and test the saw. Stihl carburetors have three adjustment screws. Pull the starting chord to check resistance. Align the screws on the carburetor. 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. Make sure to properly lubricate your chain with chain oil and check the compression in the cylinder. The best way to clean the spark arrestor screen is to unplug the spark plug wire and use a metal brush. Adjust the air screw until the idle speed is consistent. 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. This causes your engines RPMs to increase to a set limit before decreasing. He tests chainsaws based on This dirt and debris can build up and create a clog. Check the return/recoil spring and starter. It has the exact ratio requirement of gas and oil for your specific model. Answer: Yes, a chainsaw can bog down if gas is supplied to it. Lastly, its time to play mixologist. I read on here the other day some carbs can be damaged with compressed air.That would explain why sometimes they cant be fixed maybe the air is ruining something like a check valve I will wait for the masters to chime in on that. Found the problem. When a screw (e.g., anL screw) is tightened, the fuel flow to the carburetor is restricted, causing the mixture to be lean. 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. Continue with Recommended Cookies. can cause a chainsaw to bog down when cutting. Select gasoline with a minimum octane rating of 89 and a maximum ethanol content of 10%. If your chain does not rotate, you can skip this step. Clean your spark plug and measure the gap. 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. Using 10x magnifying classes I discovered a tiny piece of fiber partially clogging the high speed jet in the carb. Turning it clockwise will increase fuel flow, and turning it counterclockwise will reduce fuel flow. If the problem persists, inspect the fuel lines and ignition system. var ry=Math.floor(Math.random()*myimages2.length) First, disconnect the spark plug wire and turn the engine off. 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. Since the engine turns off shortly after starting your weed eater, the idle speed may just be too slow. Use a 50:1 gas-to-oil mixture in your 2-cycle Stihl chainsaw. The last thing anyone wants is a saw that purrs when idling and bogs down when applying gas. Cleaning a carburetor on a chainsaw without removing it can be done with a few simple steps. By properly troubleshooting and addressing any potential causes, you can prevent stalling or restarting problems with your Stihl saw. The effective supply of Air is key to a healthy chainsaw engine.You should ensure that there is enough air supply to the engine to avoid issues in the combustion chamber.Yourengine will clogonce the incoming air supply is blocked or less in supply.Once you work for a very long time without allowing your Chainsaw to rest, get ready because the filters will clog.These can be accompanied by smoking as a result of rich fuel and oil mixture.The solution to this problem is using compressed air to clean the carburetor jets and passages. Carb. If your chainsaw is bogging down when you press the throttle, it can be a sure sign of an incorrect gas-to-oil ratio. So anyhow, I've ran about 25 hours and took it for a tune up. Clean out the air filter and carburetor. If binding/catching occurs, or if the motor does not return to an idle state, your chainsaw needs to make a visit to a service provider before being used again. Try to make the right call based on the cost and gravity of the issue. The air filter in your chainsaw protects your chainsaw from dirt and debris by filtering it out before it can reach the engine. The engine boggs down under a load and when just reving the saw. I'm having trouble with my Stihl MS180 C-BE chainsaw. Rotate the fuel supply lever and keep it in the on position while you spray the carburetor cleaner. How to Adjust the Carburetor on an Eager Beaver Chainsaw. I have cleaned the air filter, replaced the fuel filter to no effect. 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. Nowadays, most chainsaws use a 50:1 ratio, but some use a 40:1. Look over all cables, connections, nuts, and screws to ensure that they are not damaged and need replacement. myimages[5]="../../../images/top-banner/cookie-mizer.jpg" Your chainsaws fuel supply system comprises the gasoline tank, fuel filter, fuel lines, and carburetor. myimages[2]="../../../images/top-banner/BladesFreeShip.jpg" (3 Common Causes). In case it is not the fuel ratio, it might be dirty or clogged air filters. Any of these could be a contributor to a chainsaw that's bogging down. 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. Next, check the spark plug to make sure it is clean and properly connected. The removal of the carburetor fuel line is very sensitive.Make drawings drawing on the lines connections to allow easy re-assembly. A daily, weekly, and monthly check-up and cleaning must be performed for optimal performance. My name is Chris Ross. It should be the first thing to check and clean. Ok I think I can share the pics from this site. Tuning regulates the flow of fuel through the might be the last resort and for that, always seek professional help. To identify air leakage, you will need to perform a pressure test on your chainsaw. How to Hang a Chainsaw to keep it Safe and Protected in 2023? Required fields are marked *. myimages[6]="../../../images/top-banner/EZ-junior.jpg" Nearly every weekend you will find us doing small or big jobs or just enjoying our garden. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. 5. Why does my Chainsaw Bog down when I Pull the Trigger? Remove the muffler. If your chainsaw wont stay running, there are several steps you can take to try and fix it before seeking professional help. 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" How Do You Repair a Chainsaw That Wont Start? Just not sure what I am doing. Rotate the saw and file the remaining teeth using the same angle and motions as before. Hence, many people complain- chainsaw bogs down when I give it gas . Over 200+ free JavaScripts here! So, lesser air is supplied to the carburetor and the saw bogs down. What Would Cause a STIHL Trimmer to Not Start? If you don't know about the perfect amount . Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Clean your chainsaw. 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. 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. It's looking a little tricky to me. Conclusion: Why Does My Chainsaw Bogs Down When I Give it Gas in 2023? You may have to look beneath the air filter or in the Users Manual for your saws model number. If any part of that ratio is off (as previously mentioned), your chainsaw will experience a lag in performance. Most engine problems can be solved with the previously mentioned adjusting procedure. Suppose that your chainsaws fuel mixture is correct, and youre still experiencing a lag in performance. no never loaned it out. These screws are in charge of regulating the fuel flow to the carburetor under varied load circumstances. On mybackyardlife.com, I share tips on everything from grilling/smoking meat with my Big Green Egg to relaxing in the pool with my family. If the saw drops at full throttle, not enough gas or air is reaching that chamber. 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. This feature is commonly found on modern chainsaws, and is designed to make adjusting the chain tension quick and easy. 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. Check the brake band for wear and tear. Similarly, adjust the other screws, namely the L and H screws, until the RPMs are at an optimal level that prevents the saw from burning out. 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. You will also reduce kickbacks and increase the overall safety of operating your chainsaw. A restricted fuel flow will reduce the power of your Stihl chainsaw. 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. Then, remove the air filter and fuel filter. Guess its time to pull the carby down and check the diaphragm and mesh. Over time, the spark arrestor can become clogged with soot. If needed, purchase the tools from a hardware store and make sure you have personal protective equipment (goggles, gloves, etc. ) Any factor that might affect supply can cause the chainsaw to bog down. Correct some carbs can be damaged by compressed air. The engine should start by now. ry=1 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. We and our partners use cookies to Store and/or access information on a device. myimages[4]="../../../images/top-banner/ez50-banner.jpg" 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. Chainsaw bogging down after starting or not starting at all is a common problem for a lot of chainsaw users. function random_imglink2(){ On most models it is either just below or just above the carburetor and secured with a metal clip. his personal experience and loves to share their nitty gritty details with his audience. Some issues can be solved at home with the right tools, and some need professional help. The engine boggs down under a load and when just reving the saw. The above answer may be brief, but I will explain it in more detail, including how to fix a chainsaw that wont start. All STIHL gasoline-powered engines can be used with up to a 10% (E10) blend of ethanol in the gasoline/engine oil mix. Youll want to start by increasing the idle speed until the engine runs smoothly. It is difficult to get the proper high-speed adjustment by ear -- most pros use a tachometer. } In some circumstances, vapor locks created in the fuel tank due to insufficient venting cause engine issues. Air Filter Issues. This can be quite annoying, especially when you have loads of work piled up and a mechanic isnt available. 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. Besides the screw setting, check and ensure that the spark plug is in working condition and that the carburetor and fuel jets are properly serviced. imagelinks2[3]="https://www.youtube.com/c/TheForestryForum?sub_confirmation=1" Misaligned screws can cause bogging down, smoking in the chainsaw, and lower performance efficiency. This issue can be fixed with the help of the user manual you received with the chainsaw. Too much or little fuel results in engine stalls.The three adjustment screws in the carburetor ((High speed, Low speed and idle) come in handy when preventing stalling.Adjusting the idle screw, for instance, is a corrective measure for a chainsaw stalling when idle. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. In both cases, your chainsaw will be affected as it can damage the engine and your chainsaw might die off when you give it gas. Following the L modification, the mixture composition should be adequate to keep your engine running. And these issues can be solved if the problem is identified. In case you have filled it wrong, drain it out and replace it with the correct mix. When you depress the trigger, a vent on the carburetor opens, allowing more gas to reach the mixing chamber. Clean or replace filters located in the fuel tank of your chain saw. I would suggest that in the first instance the carburetor settings are checked. Check the fuel tank for the correct fuel and oil mixture, filling it up if necessary. To do this: Loosen each bolt about half way down using flathead screwdriver or small wrench (depending on size). 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. The dirt in the air filters can often cause the chainsaw to stall. When not constructing or remodeling X-Ray Rooms, Cardiovascular Labs, and Pharmacies, you can find him at home with wife and two daughters. After this, check the air filter and carburetor for dirt and debris. Why does the ECHO chainsaw bog down when cutting? As a landscape builder, he helped establish two gardening companies. 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. You will need a round file that matches the diameter of your cutters, a flat file, a file guide, and a depth-gauge guide. If the spark plug looks good, check the fuel mix. These are the low-speed screw (L), the idle screw (I), and the high-speed screw (H). imagelinks[5]="https://woodmizer.com/Store/Shop/Sawmill-Options/CookieMizer-Clamping-Jig?utm_source=forestryforum.com&utm_medium=banner&utm_campaign=cookiemizer&utm_term=2021-03-09&utm_content=800x160" All small holes free of residue. Locate all the screws on the carburetor and check if they are all aligned. Correcting stalling measures are generally referred to as tune-ups.These procedures help in improving your chainsaw performance. I have ran many 2 stroke motor cycles and atv's and feel as though its a carb problem. I do sharpen the chains myself using an Oregon 511A. If the idle screw is too loose, the mixture will be too rich, and the chainsaw will not run at all, even at idling. Finally, replace the fuel filter and air filter and reconnect the spark plug. The air supply is just as important as a fuel supply in any internal combustion engine. If your chainsaw bogs down after pulling the throttle, the air/fuel delivery system needs to be examined. Because of continuous firing, the spark plugs electrodes become damaged or acquire carbon deposits, reducing spark quality. Firstly, what instigates the chainsaw Bog down? The stihl oil from the dealer will have stabilizer already in it, they will usually tune it for you for free (only if you bought it there) I assume you checked/cleaned your 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. A clean and fixed carburetor is key to achieving full throttle performance. You are using an out of date browser. Move the piston up in bore a bit more so we can see the piston below the ring and turn your flash off. (3 Common Causes). Top 11 Best Chainsaw Sharpener Tested for Sharpening 2023, How do Chainsaw Chaps Work? I asked my brother to take a look at it since he's fixed a number of chainsaws, and he says it looks like it isn't getting fuel. piston and cylinder is clean. Thank You for all replies. 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. After cleaning, attachit backto the gasoline tank. Just took off the muffler and it all looks good. The inability to reach full power during a full-throttle trigger is also a sign of bogging down. /* 2023 "Chainsaw Guru". When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust. ). If the carburetor is clogged or not adjusted properly, it can cause the saw to run out of fuel. 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. 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. All internal or external factors that reduce the supply of combustible air causes bogging down. Furthermore, the arrestor screen that catches the spark at the exhaust port is prone to carbon deposits. Tighten the idle screw with a screwdriver to fix this and see whether the engine RPMs rise. First, youll need to pull out your reading glasses and take a look at your chainsaws owners manual. 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. Locate their perfect setting at which the engine doesnt bog down when the throttle is applied. keep cutting with precision and efficiency. Clean the outside area of the carburetor. Start by identifying the carburetor on your saw. imagelinks[6]="http://www.ezboardwalk.com/" Why Is My Chainsaw Bogging Down? Make sure it is moveable and not stuck in the open or closed position. The imbalance of these components is one of the major reasons for bogging down. Vapor lock occurs when the fuel vapor pressure builds up considerably in the fuel tank and isnt allowed to escape from the tank vents. document.write('') Why does my chainsaw stall when gas is given? If you don't keep the blade oiler reservoir filled, you will have dulled blades, damaged bars, and generally poor performance. By, Read More Chainsaw Too Much Compression: Causes & SolutionContinue, Your email address will not be published. on Chainsaws, Started by rapserv For example, if the carburetor is clogged, not tuned correctly, or is contaminated, it may not be metering the right amount of fuel. +1-213-221-0119, By using this website I agree with the Disclaimer. Next, youll need to gather the right supplies for the job at hand. Although Richard does focus on other home improvement tools, his focus remains on cutting fallen trees or maintaining his backyard via chainsaw tools. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust. If it is stuck, try loosening the nut to free it up. Turn your chainsaws bar to ensure even wear and tear. 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. Maintenance is the key to avoiding all that. Why doesmy Chainsaw Startand then Stop. Dirty Spark Plug Causes a String Trimmer to Run Rough. Now take and post a picture so we can see the exhaust side of the piston. It bogs down it seems and stalls out when I open the throttle. Step Three. In order to properly access the carburetor and get at its internal components, youll then need to disassemble the carburetor. 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. The first problem is that when the saw is tilted forwards or the chain brake is disengaged it stalls. Test your stop switch to make sure that it completely stops the motor. Proceed with adjusting the carburetor adjustment screws to fix a chainsaw that wont start. Solution: Here's the solution. If the band is measuring less than 0.6 mm (0.024 in) at the most worn part, you need to replace the brake band. Check the fuel tank for the correct fuel and oil mixture, filling it up if necessary. Adjust the main jet by twisting the needle in either direction. Cleaning it by immersing it in a soap water solution is preferable. Or maybe gas varnish in the screen filter at the base of the metering needle. Clogging slows down the engine from in-taking fuel and air, which results in a bog down at full throttle. The saw has been well used over the years (1998) and not really well looked after. Consult the user manual for the right ratio of gas to oil. Over 200+ free JavaScripts here! A loose spark plug wire or incorrect gap can also be responsible for a poorly running string trimmer that bogs down. Updated: 00/04/25 You should attend to all of those anyway, before you give it a clean bill of health. In that case, its best to check your air filter and clean it if needed before moving on to more complex issues. The use of stale ethanol-blended fuel, which creates sticky white deposits over time, is the most typical source of such clogs. Using compressed air, blow out the inside of the carburetor and around the gasket. 20,427 satisfied customers. The remedy is to close the screw, but closing it too far is dangerous for the engine. 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. ( 2 cents) the new gas seems to clog small motors Mike. A dirty or damaged spark plug can cause it to misfire causing the string trimmer to run rough. Even without an incident of stalling, it is important to carry out regular repairs. 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!