Lastly, its time to play mixologist. If your chainsaw is bogging down when you press the throttle, it can be a sure sign of an incorrect gas-to-oil ratio. /* If the spark plug is fouled, it means that it is unable to ignite the fuel being provided to the cylinder. As mentioned before, most chainsaws will run on one of three gas and two-cycle engine oil mixtures. If there is none, then take off the cover and locate the carburetor. Using 10x magnifying classes I discovered a tiny piece of fiber partially clogging the high speed jet in the carb. Air Filter Issues. 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. A dirty or damaged spark plug can cause it to misfire causing the string trimmer to run rough. Bog down is mostly experienced on full throttle. Gum clogs fuel lines and carburetor.The end result is less supply of fuel for complete combustion to run the saw. Chainsaw starts but dies when I give it gas. From falling trees to slicing timber, the chainsaw is a necessity - especially if you are in the lumber industry. If your Stihl saw keeps stopping, there could be several potential causes. imagelinks2[1]="https://www.youtube.com/c/TheForestryForum?sub_confirmation=1" The engine should start by now. var imagelinks2=new Array() We like to help other people maintaining their garden and find cool products to write about. You are using an out of date browser. Also, check the lubrication hole for debris and clean your bar groove. If your chainsaw cannot get enough of either one of those critical components, it will cause the motor to stall. Stalling is a symptom of a complication in the chain-saw. 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. 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. In some circumstances, vapor locks created in the fuel tank due to insufficient venting cause engine issues. Make sure that its leveled and does not tilt. The speed would be perfect, and there would be no unusual sound when the screws are properly aligned. document.write('') The ignition system is essentially a spark plug. The new fuel cleans everything really good and what the fuel cleans ends up in the fuel filter or the carburetor screen. How to Prevent Your Chainsaw from Bogging Down imagelinks[4]="http://www.ezboardwalk.com/" Aside from the screw setting, you need to check and make sure that the spark plug is in prime working condition. Once youve made the adjustments, make sure to monitor the performance of your saw over the next few days and readjust if necessary. In case it is not the fuel ratio, it might be dirty or clogged air filters. Check the fuel tank for the correct fuel and oil mixture, filling it up if necessary. 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 . Poor chainsaw maintenance is one of the lead causes of bogging. If its clogged, replace it with a clean one. It's looking a little tricky to me. #1. Adjust the screw using only turns before trying to start the trimmer again. In that case, its best to check your air filter and clean it if needed before moving on to more complex issues. It requires an 8mm or 5/16" nut driver or wrench. Fill the tank with the prescribed gas-to-oil ratio. I take off everything can come off. The spark arrestor is a small screen that prevents the engine from emitting sparks. How to Hang a Chainsaw to keep it Safe and Protected in 2023? If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. Another possible cause of a Stihl chainsaw bogging down is a broken or worn chain. Proceed with adjusting the carburetor adjustment screws to fix a chainsaw that wont start. It should measure at 0.5 mm (0.20 in). Move the piston up in bore a bit more so we can see the piston below the ring and turn your flash off. Adjust the idle speed. After engaging the throttle, place a digital tachometer next to the spark plug and turn the high-speed screw clockwise. Cleaning it by immersing it in a soap water solution is preferable. This means emptying the fuel tank and then restarting and letting the unit run until all the fuel is consumed and the engine stops. 0 Members and 1 Guest are viewing this topic. 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. The consent submitted will only be used for data processing originating from this website. 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. Stihl chainsaw engine ( motor ) bogging down things to check first. Carb. If you observe any evidence of damage or wear on the air filter, I recommended to replace it. Additionally, the choke might be stuck in either the open or closed position and preventing the engine from running properly. myimages[1]="../../../images/top-banner/ez50-banner.jpg" The saw has been well used over the years (1998) and not really well looked after. var ry=Math.floor(Math.random()*myimages.length) This is done by turning the air screw in either direction, depending on the engines response. Together we put a lot of effort into the maintenance of our gardens over the last few years, we become obsessed with it. Use a starting fluid and letting it run flushes gunk out of the jets as an alternative to rebuilding the carburetor. The carburetor has three adjustment screws marked on it. Lastly, you should clean the air filter and replace it if necessary. It's 14in bar and chain, with a new chain on the saw. They wrote it up as I ran straight gas through it and seized it. 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). A thick fuel mixture can cause excessive carbon around the spark plug, which can even kill a chainsaw. If you experience this scenario, the orientation of your carburetor has likely changed. I doubt it has more than four or five hours on it. A restricted fuel flow will reduce the power of your Stihl chainsaw. Even without an incident of stalling, it is important to carry out regular repairs. 30:1 is recommended mostly for older models. When you depress the trigger, a vent on the carburetor opens, allowing more gas to reach the mixing chamber. Hello, and thanks for visiting my site! 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. After I got home I remover the spark plug and looked in there and everything looks good. When your Stihl MS 170 chainsaw drops its power under full load, it generally means there is an improper mixture of fuel and air in your carburetor. Adjust the high-speed screw to remedy this issue. These deposits often accumulate at the fuel filter or carburetor jets, eventually blocking them and impeding fuel flow. You should use mid-grade unleaded gasoline with a minimum octane rating of 89 and a premium two-cycle oil. File every other cutting tooth with smooth, even, pushing strokes, keeping the round file at a 90-degree (right angle) to the rollers. If your chainsaw bogs down at full throttle, the air filter and . Getting frustrated. Remove the muffler. Spark arrestor is usually placed behind muffler, so locating it is not that hard. This dirt and debris can build up and create a clog. I will try to figure out how to get the carb off tomorrow morning. One of these is not being fed to the chainsaw in the proper ratio. 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 spark arrestor is a small screen that prevents the engine from emitting sparks. If the problem persists, inspect the fuel lines and ignition system. Select gasoline with a minimum octane rating of 89 and a maximum ethanol content of 10%. Any factor that might affect supply can cause the chainsaw to bog down. The reason for. I do sharpen the chains myself using an Oregon 511A. Generally, you will find the fuel filter on the fuel line, usually near the carburetor. 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. The engine boggs down under a load and when just reving the saw. 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. Save my name, email, and website in this browser for the next time I comment. To rule out any of these as a potential cause, its important to first check the air filter. 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. Clean out the air filter and carburetor. Clean and/or replace the spark arrestor screen. Chain filing isnt a difficult task and is crucial in maintaining your chainsaw. Question: What's the reason for the chainsaw to die under heavy load? Its quite perplexing, but this article will delve deep to unravel why the chainsaw bogs down when you give it gas and how to solve the problem. myimages[3]="../../../images/top-banner/LX25-FreeShipping.jpg" Knowing how to mix fuel properly is the first step to ensuring that your chainsaw will stay up and running for years to come. Begin by draining the fuel tank and draining the existing fuel from the carburetor. More so, the chainsaw might bog and refuse to run when you give it gas. If your Stihl chainsaw starts up with a reassuring puttering sound, but dies when you pull the throttle trigger, there likely is an issue with the fuel, but the carburetor could need. I have ran many 2 stroke motor cycles and atv's and feel as though its a carb problem. ), 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. Loosening the screw, on the other hand, enriches the mixture with gasoline and lowers the RPMs to a set limit. Because of continuous firing, the spark plugs electrodes become damaged or acquire carbon deposits, reducing spark quality. The solution is easy and you can do it within a few minutes. After a little looking, the two nuts that hold the back of the carb and filter housing were loose, I tightened them up and it ran like a top. Ben has a bachelors degree in construction engineering. Page created in 1.341 seconds with 39 queries. 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. First, disconnect the spark plug wire and turn the engine off. Over 200+ free JavaScripts here! In case you have filled it wrong, drain it out and replace it with the correct mix. Please loginor register. Stihl MS 180C running problems, bogging down, fuel starvation?? 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. Also cleaned muffler and replaced spark arrestting screen.All with no luck. Any of these could be a contributor to a chainsaw that's bogging down. Jun 16, 2006. 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. Check the brake band for wear and tear. As a result, the engine runs at too high or too low RPMs. imagelinks2[3]="https://www.youtube.com/c/TheForestryForum?sub_confirmation=1" Finally, replace the air filter on the chainsaw. Turn your chainsaws bar to ensure even wear and tear. The carburetor must be maintained, but first, check that your engines filters are thoroughly cleaned. Use big lines will for fuel filter lines connected to the inside of the tank.Also, use smaller of two lines for return to the fuel tank from the carburetor from the primer bulb. The first step is to make sure that your chainsaw has enough fuel. We are compensated for referring traffic and business to Amazon and other companies linked to on this site. For example, if the carburetor is clogged, not tuned correctly, or is contaminated, it may not be metering the right amount of fuel. Use a 50:1 gas-to-oil mixture in your 2-cycle Stihl chainsaw. 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. Misaligned screws can cause bogging down, smoking in the chainsaw, and lower performance efficiency. What causes a chainsaw to bog down when accelerating? I tried putting new gas in it and starting it up but it didn't make a difference. Although Richard does focus on other home improvement tools, his focus remains on cutting fallen trees or maintaining his backyard via chainsaw tools. Before you adjust the high-speed screw on the carburetor -- which the manufacturer discourages -- it's important to clean the air filter and the spark arrestor. if (ry==0) Check cooling fins on the cylinder and clean if needed. 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. If t present cleaning your tank isnt an option. The muffler looks easy enough to remove but I want to check out the carb. on Chainsaws, Started by H60 Hawk Pilot Over time, the spark arrestor can become clogged with soot. A Detailed Guide, What Size Chainsaw Do I Need in 2023? 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 has a new spark plug, clean air filter, n Welcome, Guest. +1-213-221-0119, By using this website I agree with the Disclaimer. Chain-saw requires constant maintenance to be efficient. on Chainsaws, Started by bkkraft 5. Rotate the saw and file the remaining teeth using the same angle and motions as before. his personal experience and loves to share their nitty gritty details with his audience. 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. Updated: 00/04/25 This will keep your chain in place for the next steps. By properly troubleshooting and addressing any potential causes, you can prevent stalling or restarting problems with your Stihl saw. Youll want to start by increasing the idle speed until the engine runs smoothly. LancelotLawns said: I bought a stihl bg85 blower/vacuum two days ago. Cant get a good picture becouse of the glare of the piston. 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. Now take and post a picture so we can see the exhaust side of the piston. Thoroughly inspect your throttle trigger. Why does the chainsaw bog down at full throttle? Why does my Stihl chainsaw bog down when I give it gas? Dealing with a carburetor requires strict guidelines to be followed. removed it and saw functions perfectly. Tighten the idle screw with a screwdriver to fix this and see whether the engine RPMs rise. Using compressed air, blow out the inside of the carburetor and around the gasket. myimages[5]="../../../images/top-banner/cookie-mizer.jpg" Check the return/recoil spring and starter. 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. The first step is to make sure that your chainsaw has enough fuel. 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. piston and cylinder is clean. 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. Disengage the chain brake and manually advance through the chain until you reach your starting point mark. All STIHL gasoline-powered engines can be used with up to a 10% (E10) blend of ethanol in the gasoline/engine oil mix. Mix in a premium 2-cycle oil that is ISO-L-EGD and JASO M345 FD certified. If your chainsaws carburetor is not clogged, the tuning of your carburetor may be to blame. 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. If the spark arrestor is clogged, the chainsaw may run stall or run rough. Something may be amiss in the low or high speed circuit of the carb. Older saws have degraded lines which need replacement. Now that you know how incorrectly mixed fuel can impact your chainsaw, its time to learn the correct way to combine the right fuel you need to get your motor up and running! Test your stop switch to make sure that it completely stops the motor. If your chainsaws carburetor becomes clogged with dirt and debris, airflow is restricted and the chainsaws engine suffers. Clogging usually occurs due to long working hours. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); Your email address will not be published. Since the engine turns off shortly after starting your weed eater, the idle speed may just be too slow. http://www.ebay.com/itm/STIHL-017-MS170-018-MS180-Replacement-CARBURETOR-CARB-/130584786959?pt=US_Chainsaws&hash=item1e6775b80f, Quote from: rstarkie on June 06, 2013, 09:50:21 PM, Quote from: Submariner on December 14, 2018, 01:42:06 PM, Running problems Husqvarna 246 and Shindaiwa 457S probably bad fuel issues, Figured Out My Efco 251 Fuel Starvation Problem (shuting off after 4 or 5 min. Clean it with a wire brush. You can have as many as you wish The Forestry Forum is sponsored in part by: This is usually behind the air filter, but if you have trouble locating it, consult your user manual. To remove it you need to depress a small tab and slide the fuel line off. . The chainsaw will bog down or stop running. 453 S Spring St Ste 400 JavaScript is disabled. 20,427 satisfied customers. If the gas is supplied to the chainsaw then the filters can clog easily. When your Stihl MS 170 chainsaw drops its power under full load, it generally means there is an improper mixture of fuel and air in your carburetor. It may not display this or other websites correctly. I didn't run straight gas through it and it isn't sized up so I am wanting to dig into the carb myself. It is also its orientation that keeps it working smoothly on little or full throttle. 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. These are the low-speed screw (L), the idle screw (I), and the high-speed screw (H). Additionally, it is a good idea to check the spark plug to make sure it is in good condition. The imbalance of these components is one of the major reasons for bogging down. I have cleaned the air filter, replaced the fuel filter to no effect. Here are the solutions for common reasons why chainsaw bogs down after giving it gas - 1. Secure your chainsaw to maintain stability while working. It may not display this or other websites correctly. 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. Go ahead and buy a new fuel filter. Even if you are a novice chainsaw operator, these spark plugsshould be updated at least once a year. Fix your Lawnmower with our Lawnmower Troubleshooting tool. Los Angeles, CA 90013 Pull the starting chord to check resistance. What Would Cause a STIHL Trimmer to Not Start? Find the screw to adjust the idle speed. 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. You are using an out of date browser. The air supply is just as important as a fuel supply in any internal combustion engine. 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. The reason for that may be you're using the saw at altitude or the carburetor adjustment has simply slipped. Cleaning a carburetor on a chainsaw without removing it can be done with a few simple steps. no never loaned it out. If your chain starts to spin, loosen the idler screw until it stops. Finally, the ignition system might need to be adjusted or repaired, and for this, you should contact a professional for assistance. Frustrating, right? When your saw blade starts to dull, your blade will start producing powder, rather than chips. This is partly due to clogged filters resulting from long working hours and less air supply to the carburetor (which will be discussed later). There are a number of carburetor-related problems. 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. Finally, check the choke. Check that the anti-vibration elements are not damaged, torn, or soft. Consider cleaning your carburetor and air/fuel filters if the problem persists. Tuning regulates the flow of fuel through the might be the last resort and for that, always seek professional help. The dream of everyone in the lumbering field is to have a powerful and efficient chainsaw devoid of mechanical faults. imagelinks[3]="https://woodmizer.com/Store/Shop/Portable-Sawmills/LX25-Portable-Sawmill?utm_source=forestryforum.com&utm_medium=banner&utm_campaign=lx25&utm_term=2023-02-10&utm_content=800x160" When a chainsaw bogs down when accelerating, it typically means the engine is not receiving enough fuel or air. Do not store a dirty chainsaw. This is crucial since an idle chain is extremely harmful. It is responsible for mixing fuel and supplying it to the engine. Look over all cables, connections, nuts, and screws to ensure that they are not damaged and need replacement. Why does the ECHO chainsaw bog down when cutting? I think I am having the same problem with mine. Make sure to take out the spark plug before removing the filter. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. He pledges to come up with new knowledge about chainsaws every once in a while. Find the source of the issue and you can easily fix it. SO i use gas additive in all my 2 stroke gas mixture, either sta-bil, lucas, hell even sea foam says it will keep 2 stroke gas good for a long time. Will start, sound fine, and work for a couple of minutes, until it gets warm. 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. There are three adjustment screws on the carburetor: low-speed (L), high-speed (H), and idling (I). Its an essential step in properly maintaining your chainsaw to check and adjust the chain tension. Manage Settings Just not sure what I am doing. First and foremost, you should check that you are using the correct fuel and oil mixture for your chainsaw. Richard lives out in the wild with his other half, Diana Richard. How did you get the carb off? 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. I have a MS250 that's only two years old and has barely been used. 1 Hour1 Day1 Week1 MonthForever Your email address will not be published. So I am just wondering how to go about pulling the carb off the easiest way to check out the jets. California. /* if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'remodelormove_com-leader-2','ezslot_17',164,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-leader-2-0');If the fuel lines are blocked or restricted, clean or replace them accordingly. Clogging slows down the engine from in-taking fuel and air, which results in a bog down at full throttle. Tuning of the screws to adjust and align them. In case you have lost it, the majority of chainsaws follow the following gas: oil ratio. Using a screwdriver, remove the air filter cover on the back of your chainsaw. The new fuel doesn't really clog the carbs. I think I am having the same problem with mine. Take great care in removing the smaller parts and remove any debris or build up in the carburetor. 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. 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. 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. 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. If the drive belt is worn or broken, replace it with a new one as soon as possible. The location of the fuel filter on a Poulan chainsaw varies depending on the model. Get a carburetor repair kit before you begin clearing the blocked jets. 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. 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. For instance: It is impossible not to lose power when the firewood chainsaw is being used constantly.