To check if theres a vapor lock, unscrew the tanks cap and put it back on again. document.write('') Clean your chainsaw. This causes your engines RPMs to increase to a set limit before decreasing. However, when your chainsaw bogs down, it turns your enjoyable day in the backyard into a complete headache. 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. 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. The (I) screw is a butterfly valve that controlsidle RPMs by raising or lowering the flow of the air-fuel mixture. To adjust the tension on the chain, the user simply turns a knob located near the drive sprocket. More so, the chainsaw might bog and refuse to run when you give it gas. myimages[3]="../../../images/top-banner/LX25-FreeShipping.jpg" Finally, replace the fuel filter and air filter and reconnect the spark plug. If your chainsaw dies when you give it gas, you need to ensure that the idle screw (I) and low-speed screw (L) are adjusted correctly. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. No Power at Full Throttle on My Stihl MS 170 | eHow If your chainsaw is bogging down when you press the throttle, it can be a sure sign of an incorrect gas-to-oil ratio. Nearly every weekend you will find us doing small or big jobs or just enjoying our garden. If any part of that ratio is off (as previously mentioned), your chainsaw will experience a lag in performance. Begin by draining the fuel tank and draining the existing fuel from the carburetor. The saw has been well used over the years (1998) and not really well looked after. If the drive belt is worn or broken, replace it with a new one as soon as possible. Chainsaw Bogging with throttle pressure - Hearth.com Forums Home Make sure to take out the spark plug before removing the filter. Getting frustrated. Stihl chainsaw engine ( motor ) bogging down things to check first. var myimages2=new Array() Check the return/recoil spring and starter. piston and cylinder is clean. You can have as many as you wish Hence, many people complain- chainsaw bogs down when I give it gas . 0 Members and 1 Guest are viewing this topic. As a preventative measure, always keep your tank vents clean. Updated: 00/04/25 Other indicators that your chainsaw may be suffering from carburetor troubles are overheating or excessively smoky exhaust. Where are these located and on what carbs? 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. 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. All STIHL gasoline-powered engines can be used with up to a 10% (E10) blend of ethanol in the gasoline/engine oil mix. Its starts fine, but if you give it gas it will shut off. 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. My Chainsaw Bogs Down When I Give It Gas; Causes and Solutions [2023]. Being in the cutting services for more than 10 years, I know a thing or two about chainsaw. Yea, its not rocket science but reality. We may earn a small commission from affiliate links and paid advertisements. The air filter in your chainsaw protects your chainsaw from dirt and debris by filtering it out before it can reach the engine. When the chainsaw is unable to hit full power during the full throttle, it's a good sign that your chainsaw is bogging down. The saw also won't operate well at speed if the air filter or spark arrestor or carburetor are dirty. A clean and fixed carburetor is key to achieving full throttle performance. To keep your chainsaw running smoothly, you should service it regularly and keep up scheduled maintenance visits with a reputable, authorized chainsaw service center. 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. Home Why Is My Chainsaw Bogging Down? 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. ry=1 A thick fuel mixture can cause excessive carbon around the spark plug, which can even kill a chainsaw. Why Is My Chainsaw Bogging Down? (3 Common Causes) When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust. After checking that, soak the crank seals in motor oil (30w works great) and then give it a go. Consider cleaning your carburetor and air/fuel filters if the problem persists. Why does my chainsaw stall when gas is given? To do this: Loosen each bolt about half way down using flathead screwdriver or small wrench (depending on size). Secondly, its about time we take a look at why your chainsaw suddenly stops working.The carburetor is like the vein in engines.Once it is clogged, the free flow of air and fuel will be blocked and the engine will be starved of fuel.To quell this issue, wash away the diets using the carburetor cleaner.In some scenarios, washing away or cleaning the carburetor may not be effective, hence, you should consider buying a new carburetor or repairing it.A clogged fuel tank can also cause the chainsaw to stop working.In such cases, endeavor to drain the old file from the chainsaw SNF ensure that the fuel tank is devoid of fuel. There are three adjustment screws on the carburetor: low-speed (L), high-speed (H), and idling (I). Although Richard does focus on other home improvement tools, his focus remains on cutting fallen trees or maintaining his backyard via chainsaw tools. The remedy is to close the screw, but closing it too far is dangerous for the engine. Wash it in soapy water with a soft-bristle brush. Does Your Poulan Chainsaw Stall When Giving It Gas? File every other cutting tooth with smooth, even, pushing strokes, keeping the round file at a 90-degree (right angle) to the rollers. For a better experience, please enable JavaScript in your browser before proceeding. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust. Answered by Patrick, Top 10 Best Chainsaw Bars Tested and Compared for 2023, How does a Chainsaw Carburetor Work? Richard lives out in the wild with his other half, Diana Richard. Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. if (ry==0) 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. If your chain starts to spin, loosen the idler screw until it stops. Maintenance is the key to avoiding all that. myimages[4]="../../../images/top-banner/ez50-banner.jpg" Technician. 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. Clean it with a wire brush. I think I am having the same problem with mine. It is responsible for mixing fuel and supplying it to the engine. Mix in a premium 2-cycle oil that is ISO-L-EGD and JASO M345 FD certified. --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 will need a round file that matches the diameter of your cutters, a flat file, a file guide, and a depth-gauge guide. If your Stihl chain saw purrs like a cheetah when it's idling but stalls when you actually try to do some work with it, it could indicate the carburetor isn't adjusted properly. I didn't run straight gas through it and it isn't sized up so I am wanting to dig into the carb myself. This blog is written by a group of Garden Tool enthusiasts. Continue with Recommended Cookies. If it still doesnt look clean, it might be time to replace it. Stihl MS 180C running problems, bogging down, fuel starvation?? Chainsaw bogs down in cut in Chainsaws - forestryforum.com Knowing how to mix fuel properly is the first step to ensuring that your chainsaw will stay up and running for years to come. Clean and/or replace the spark arrestor screen. You must locate the perfect setting at which the engine won't stop once the throttle is applied. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust. It is experienced during welding, idling, or full throttle. Locate all the screws on the carburetor and check if they are all aligned. 6. The spark plugs spark quality degrades over time, making it impossible to ignite the air-fuel mixture in the combustion chamber. If there is none, then take off the cover and locate the carburetor. Its worth noting that loosening a screw improves the fuel flow rate and enriches the mixture while tightening the screw has the reverse effect. By a silver star and you can post unlimited pictures. Another possible cause of a Stihl chainsaw bogging down is a broken or worn chain. Inspect the fuel line condition. This issue can be fixed with the help of the user manual you received with the chainsaw. This feature is commonly found on modern chainsaws, and is designed to make adjusting the chain tension quick and easy. The rakers are angled low to high with the high end in front of the cutter. Echo cs 400 chainsaw problems - Shawee Power Equipment If your chainsaws carburetor becomes clogged with dirt and debris, airflow is restricted and the chainsaws engine suffers. As mentioned before, most chainsaws will run on one of three gas and two-cycle engine oil mixtures. Since the engine turns off shortly after starting your weed eater, the idle speed may just be too slow. If the fuel mix is old or has not been adjusted properly to the manufacturers specifications, refresh it or adjust it. 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. Ben has a bachelors degree in construction engineering. 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. Top 11 Best Chainsaw Sharpener Tested for Sharpening 2023, How do Chainsaw Chaps Work? Turning it clockwise will increase fuel flow, and turning it counterclockwise will reduce fuel flow. 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. . Unless you are running an electric chainsaw (which is a totally different beast), your chainsaws motor is a combustion system that relies on a proper ratio of gas, oil, and air. I take off everything can come off. 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. To remove it you need to depress a small tab and slide the fuel line off. This can also be caused by bad fuel. The standard compression reading required for most 2-cycle chainsaw is around 100-110 psi to start. This dirt and debris can build up and create a clog. 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.. One of the most common causes is a dirty air filter, which can block air from entering the chainsaw engine and prevent it from getting the oxygen it needs to operate efficiently. I just worked on my grandpa's ms 192t. Why does my Stihl chainsaw bog down when I give it gas? 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. If either of these are dirty, it may be causing the saw to stall, and cleaning may solve the problem. Also, check the lubrication hole for debris and clean your bar groove. 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. Turn your chainsaws bar to ensure even wear and tear. By properly troubleshooting and addressing any potential causes, you can prevent stalling or restarting problems with your Stihl saw. Prevent oil from accumulating in the engine. Remove the muffler. What causes a chainsaw to bog down when accelerating? The issue of chainsaw bog down can be very calamitous, and it oozes a great deal of frustration. Read more about this in, "This is the Type of Gas to Use in a String Trimmer". Make sure that its leveled and does not tilt. 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! . Clogging usually occurs due to long working hours. Fill the tank with the prescribed gas-to-oil ratio. Using a screwdriver, remove the air filter cover on the back of your chainsaw. Any factor that might affect supply can cause the chainsaw to bog down. Adjusting the H screw will help achieve optimal performance. STIHL Chainsaws FAQs | STIHL Product FAQs - STIHL - The Number One Generally, you will find the fuel filter on the fuel line, usually near the carburetor. Aside from the screw setting, you need to check and make sure that the spark plug is in prime working condition. 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" It may not display this or other websites correctly. 4. Find the screw to adjust the idle speed. Locate their perfect setting at which the engine doesnt bog down when the throttle is applied. Your manual will provide detailed instructions on how to do this. On most models it is either just below or just above the carburetor and secured with a metal clip. This is usually behind the air filter, but if you have trouble locating it, consult your user manual. his personal experience and loves to share their nitty gritty details with his audience. If you observe any evidence of damage or wear on the air filter, I recommended to replace it. The one that is often damaged by compressed air is the one inside the high speed nozzle. Taking all of these potential issues into account and fixing them as needed should help to correct the issue and get your chainsaw running properly. They are Sthil chains. Dirty Spark Plug Causes a String Trimmer to Run Rough. Disengage the chain brake and manually advance through the chain until you reach your starting point mark. random_imglink2() Will start, sound fine, and work for a couple of minutes, until it gets warm. Why does my Chainsaw Bog down when I Pull the Trigger? After considerable usage, specific engine components like the crank seals and the head gaskets wear out and develop leakages. You may have to look beneath the air filter or in the Users Manual for your saws model number. on Chainsaws. Hello, and thanks for visiting my site! How to Prevent Your Chainsaw from Bogging Down, How Much Compression Should a Chainsaw Have, How to Replace Fuel Lines on a Poulan Chainsaw, How To Reset Echo 58-Volt Battery Charger, Chainsaw Too Much Compression: Causes & Solution. Lastly, its time to play mixologist. Chainsaw bogging down after starting or not starting at all is a common problem for a lot of chainsaw users. Try to make the right call based on the cost and gravity of the issue. //specify corresponding links below It's 14in bar and chain, with a new chain on the saw. I'm an arborist by profession & a blogger by passion. A clogged air filter or spark plug can cause your chainsaw to start and then stop. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust. Rotate the saw and file the remaining teeth using the same angle and motions as before. imagelinks[6]="http://www.ezboardwalk.com/" Lock the chain brake by pushing the handle forward. myimages[2]="../../../images/top-banner/BladesFreeShip.jpg" You may have to contend with disassembling your carburetor to correct the mechanical issues bringing about the stalling.Before you to this drastic step first exhaust all possible causes of the problem. Step Three. Its an essential step in properly maintaining your chainsaw to check and adjust the chain tension. All small holes free of residue. 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. Frustrating, right? The best way to clean the spark arrestor screen is to unplug the spark plug wire and use a metal brush. How did you get the carb off? Make sure to properly lubricate your chain with chain oil and check the compression in the cylinder. When a chainsaw bogs down when accelerating, it typically means the engine is not receiving enough fuel or air. This will keep your chain in place for the next steps. stihl chainsaw bogs down when i give it gas Clean air intake slots on the housing of the starter and inspect your starter cord for any damage. 1. This article thus covers all causes and solutions to why does my chainsaw bogs down when I give it gas problem below: In a chainsaw both fuel starvation or termination of the connection between carburetor and engine can lead to a bog down. 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. Using compressed air, blow out the inside of the carburetor and around the gasket. 2. The removal of the carburetor fuel line is very sensitive.Make drawings drawing on the lines connections to allow easy re-assembly. Even without an incident of stalling, it is important to carry out regular repairs. It is recommended to replace the fuel filter every year to ensure optimal performance and avoid any possible issues. 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. my elevation is 640' above sea level. 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. There are a number of issues to check in a sequence as why a mini chainsaw would bog at full throttle. Stihl BG85 blower | Lawn Care Forum 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. Turning the knob will either tighten or loosen the chain, depending on the direction the user turns the knob. Solution: Use the user manual to locate the air filter. Why does my Stihl chainsaw bog down when I give it gas? Tips from a Professional, Chainsaw Starts but Wont Idle. If your chainsaw dies when you give it gas, make sure that the low-speed screw (L) and the idle screw (I) are correctly adjusted. Anobstruction in any of these components may disrupt the fuel flow to the engine, leading to the engine bogging down while idling. A carburetor is a part of a combustion motor that mixes air and fuel in a specific ratio for combustion. Updated: 00/04/25 can cause a chainsaw to bog down when cutting. It should measure at 0.5 mm (0.20 in). JavaScript is disabled. Additionally, if the air filter is dirty or blocked, that can also lead to a bogging issue. Apr 16, 2009. It requires an 8mm or 5/16" nut driver or wrench. That explains why they run worse after i rebuild them! The ignition system includes the spark plugs, ignition coil, and exhaust muffler. In case you have filled it wrong, drain it out and replace it with the correct mix. It bogs down it seems and stalls out when I open the throttle. } Found the problem. The reason for. Bog down is mostly experienced on full throttle. Save my name, email, and website in this browser for the next time I comment. (Even After Sharpening). 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. Correct mixing of fuel ingredients. The above answer may be brief, but I will explain it in more detail, including how to fix a chainsaw that wont start. It's all clean no cracks no discoloration nothing. If t present cleaning your tank isnt an option. 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. First, remove the old fuel line from the fuel tank. Replace it if the quality has deteriorated. Confirm for water and debris in your fuel tank. imagelinks2[3]="https://www.youtube.com/c/TheForestryForum?sub_confirmation=1" Detailed Answer. Also, use a clean cloth and some carburetor cleaner to wipe down the inside of the carburetor. Run a check on your chainsaws cooling system. Weather is 30-50 when I'm cutting and I'm trying to run 40:1, 93 only. function random_imglink2(){ If the plug checks out, try removing it and spraying it with aerosol-based cleaner. For the spark plug, use a delicate brush, a wire, or a plug spray-on to clean off the thick carbon. We and our partners use cookies to Store and/or access information on a device. Make sure it is moveable and not stuck in the open or closed position. Check the spark plug as well to examine the ignition system. if (ry==0) Check for any loosened nuts or screws and retighten if needed. Anyone have any suggestions? The first step is to make sure that your chainsaw has enough fuel. Then, disconnect the old fuel line from the, Read More How to Replace Fuel Lines on a Poulan ChainsawContinue, Pull out your battery from the chainsaw, and press the battery button sustainably for a minimum of 5 seconds before you release it. 01 - Stihl Chainsaw Spark Arrestor. An incorrect mixture is also known as a rich mixture which can be caused when there is too much gas as compared to the oil. I would suggest that in the first instance the carburetor settings are checked. New Husqvarna 550XP had to be reprogrammed. */ I'm having trouble with my Stihl MS180 C-BE chainsaw. Next, check the spark plug to make sure it is clean and properly connected. The Author The dream of everyone in the lumbering field is to have a powerful and efficient chainsaw devoid of mechanical faults. If the carburetor is clogged or not adjusted properly, it can cause the saw to run out of fuel. Gum clogs fuel lines and carburetor.The end result is less supply of fuel for complete combustion to run the saw. Why Does My Chainsaw Bogs Down When I Give it Gas? 5 Causes Remedy this by adjusting the high-speed screw. Stihl ST251C Chainsaw Stalls when I depress the throttle. 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. If the saw drops at full throttle, not enough gas or air is reaching that chamber. Over time, the spark arrestor can become clogged with soot. Adjust the screw using only turns before trying to start the trimmer again. //-->,