Inspect the clutch center, drum, and spring for any excessive wear. 1. function random_imglink2(){ 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. 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. Select gasoline with a minimum octane rating of 89 and a maximum ethanol content of 10%. I doubt it has more than four or five hours on it. 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. Look over all cables, connections, nuts, and screws to ensure that they are not damaged and need replacement. Over time, the spark arrestor can become clogged with soot. I think I am having the same problem with mine. As a landscape builder, he helped establish two gardening companies. The manual should give you the proper gas-to-oil ratio for your particular chainsaw. The first step is to make sure that your chainsaw has enough fuel. 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. If the chain is loose or dull it may result in the saw not having enough power to keep running. Mix in a premium 2-cycle oil that is ISO-L-EGD and JASO M345 FD certified. } You are using an out of date browser. 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. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust. Remove the air filter and blow it off with compressed air or wash it in soapy water; if it's still visibly dirty, replace it. It is experienced during welding, idling, or full throttle. 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. For that you require a carburetor cleaner. Why does my chainsaw stall when gas is given? 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. Loosening the screw, on the other hand, enriches the mixture with gasoline and lowers the RPMs to a set limit. Let the chainsaw cool down if there's excessive smoke release or the chainsaw got heated up. The saw has been well used over the years (1998) and not really well looked after. Even if you are a novice chainsaw operator, these spark plugsshould be updated at least once a year. 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. I have a MS250 that's only two years old and has barely been used. The answer is simple; you check your chainsaws owners manual. This is crucial since an idle chain is extremely harmful. This is usually behind the air filter, but if you have trouble locating it, consult your user manual. Currently I live in Austin, United States. Make sure to take out the spark plug before removing the filter. Save my name, email, and website in this browser for the next time I comment. If you experience this scenario, the orientation of your carburetor has likely changed. 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. On most models it is either just below or just above the carburetor and secured with a metal clip. So anyhow, I've ran about 25 hours and took it for a tune up. Rotate the saw and file the remaining teeth using the same angle and motions as before. Over 200+ free JavaScripts here! When a clog occurs, your engine will not get enough air to operate effectively. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. on Chainsaws, Started by H60 Hawk Pilot Any of these could be a contributor to a chainsaw that's bogging down. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. 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. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. skytower, Oct 3, 2010. They are Sthil chains. That explains why they run worse after i rebuild them! Working outdoors can be such a cathartic experience. Be sure that your oiler is adequately lubricating your bar and chain. To do this: Loosen each bolt about half way down using flathead screwdriver or small wrench (depending on size). no never loaned it out. Next, youll need to gather the right supplies for the job at hand. Spark arrestor is usually placed behind muffler, so locating it is not that hard. It may not display this or other websites correctly. Before you start, be sure to read the manufacturers instructions carefully. When I remove the cover (13), I find the upper surface of the filter (2) heavily contaminated (this is an aftermarket eBay filter, perhaps it is not sealing properly? Find the screw to adjust the idle speed. Secure your chainsaw to maintain stability while working. Youll want to start by increasing the idle speed until the engine runs smoothly. Jul 22, 2008. I'm an arborist by profession & a blogger by passion. Since the engine turns off shortly after starting your weed eater, the idle speed may just be too slow. Start by sharpening the cutting teeth of the blade first. The first problem is that when the saw is tilted forwards or the chain brake is disengaged it stalls. That should help improve the performance of the chainsaw and resolve the issue of your saw stalling when you give it gas. Remove the muffler. Jun 16, 2006. You may have to look beneath the air filter or in the Users Manual for your saws model number. To check if theres a vapor lock, unscrew the tanks cap and put it back on again. 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. When the mixture in the carburetor is too lean, the engine races and overheats and the piston can seize. If the problem persists, inspect the fuel lines and ignition system. Vapor lock occurs when the fuel vapor pressure builds up considerably in the fuel tank and isnt allowed to escape from the tank vents. 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. 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. Why does my Stihl chainsaw bog down when I give it gas? 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. Over time, the spark arrestor can become clogged with soot. 01 - Stihl Chainsaw Spark Arrestor. Check, clean, and replace (if necessary) the air filter. The Author The dream of everyone in the lumbering field is to have a powerful and efficient chainsaw devoid of mechanical faults. 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. A new chainsaw has some protocols to follow. 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. The main reason for an ECHO chainsaw to bog down is the dirty spark arrestor. If the kit comes with welch plugs I take those out too. Dirty Spark Plug Causes a String Trimmer to Run Rough. A chainsaw is a tool, and no tool is perfect. 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. Replacement of carburetor is the best option if you have an old chainsaw.This is because the diaphragm gets hard making it hard to crank. A daily, weekly, and monthly check-up and cleaning must be performed for optimal performance. Tuning regulates the flow of fuel through the might be the last resort and for that, always seek professional help. Check inside the fuel tank for dirt and debris. This can be done with a vise, clamps, or any type of fastener that will stabilize your chainsaw. The fuel lines or ignition system may have beenaffected if the problems continue despite adjustment. Required fields are marked *. The reason for that may be you're using the saw at altitude or the carburetor adjustment has simply slipped. If the plug checks out, try removing it and spraying it with aerosol-based cleaner. How Do You Repair a Chainsaw That Wont Start? L and H on your chainsaw. Adjusting the H screw will help achieve optimal performance. I have a MS250 that's only two years old and has barely been used. The spark plugs spark quality degrades over time, making it impossible to ignite the air-fuel mixture in the combustion chamber. Being in the cutting services for more than 10 years, I know a thing or two about chainsaw. 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. A Detailed Guide, What Size Chainsaw Do I Need in 2023? --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? Most engine problems can be solved with the previously mentioned adjusting procedure. Why does my Chainsaw Bog down when I Pull the Trigger? By a silver star and you can post unlimited pictures. Where are these located and on what carbs? Dirty filters are the main problem. It's 14in bar and chain, with a new chain on the saw. 4. (3 Common Causes). A clogged air filter or spark plug can cause your chainsaw to start and then stop. Obviously pull the carb and exhaust when you do this. Nearly every weekend you will find us doing small or big jobs or just enjoying our garden. myimages[2]="../../../images/top-banner/BladesFreeShip.jpg" After checking that, soak the crank seals in motor oil (30w works great) and then give it a go. First, remove the old fuel line from the fuel tank. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'remodelormove_com-medrectangle-3','ezslot_1',155,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-medrectangle-3-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'remodelormove_com-medrectangle-3','ezslot_2',155,'0','1'])};__ez_fad_position('div-gpt-ad-remodelormove_com-medrectangle-3-0_1');.medrectangle-3-multi-155{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:7px!important;margin-left:auto!important;margin-right:auto!important;margin-top:7px!important;max-width:100%!important;min-height:250px;padding:0;text-align:center!important}You should also check the chain tension and sharpness and consider replacing the chain if that is necessary. Updated: 00/04/25 One of these is not being fed to the chainsaw in the proper ratio. A dirty arrestor, on the other hand, is the cause of overheating your experience in a bog down. 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. Technician. No wonder I dont have any luck with the damn things!Sea foam and an ultrasonic and thats it huh what is your success rate?Do you need to pull those small pie shaped plugs? Clogging usually occurs due to long working hours. How to Prevent Your Chainsaw from Bogging Down For a better experience, please enable JavaScript in your browser before proceeding. Manage Settings The above answer may be brief, but I will explain it in more detail, including how to fix a chainsaw that wont start. document.write('') I ask if they checked the carb and they said no. Generally, you will find the fuel filter on the fuel line, usually near the carburetor. before starting the process. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Re: Chainsaw bogs on full . Suppose that your chainsaws fuel mixture is correct, and youre still experiencing a lag in performance. The idling (I) screw regulates the mass flow rate of the air-fuel combination entering the engine at idle. Make sure that its leveled and does not tilt. Clear all dirt and debris from the saw body, chain, and bar. The location of the fuel filter on a Poulan chainsaw varies depending on the model. If the air filter is clean, then the spark plug should be cleaned and gap adjusted to the manufacturers specifications. var imagelinks=new Array() If the spark arrestor is clogged, the chainsaw may run stall or run rough. var myimages=new Array() He tests chainsaws based on Clean it with a wire brush. 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. 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. The standard compression reading required for most 2-cycle chainsaw is around 100-110 psi to start. 2. A Stihl chainsaw can bog down for a variety of reasons. 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. Correct mixing of fuel ingredients. 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. Why Is My Chainsaw Bogging Down? Any factor that might affect supply can cause the chainsaw to bog down. Or maybe gas varnish in the screen filter at the base of the metering needle. Your email address will not be published. The best/easiest way to do this is to poor some motor oil on the outside of the crankshaft and then also fill the engine with motor oil. Together we put a lot of effort into the maintenance of our gardens over the last few years, we become obsessed with it. Answered by Patrick, Top 10 Best Chainsaw Bars Tested and Compared for 2023, How does a Chainsaw Carburetor Work? Updated: 00/04/25 More so, the chainsaw might bog and refuse to run when you give it gas. There is no hiding from dirt. The dirt in the air filters can often cause the chainsaw to stall. For the spark plug, use a delicate brush, a wire, or a plug spray-on to clean off the thick carbon. 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. or a blockage in the mesh strainer in the pump chamber. 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. . This jet is usually responsible for controlling the fuel/air mixture. A carb cleaner spray is an excellent tool for eliminating sticky deposits from your jets and reviving your carburetor. It bogs down it seems and stalls out when I open the throttle. Stihl chainsaw engine ( motor ) bogging down things to check first. 3. Lock the chain brake by pushing the handle forward. I have never worked on anything this small. The air supply is equally as important as fuel for a combustion engine. The spark arrestor is a small screen that prevents the engine from emitting sparks. 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. Some issues can be solved at home with the right tools, and some need professional help. Align the screws on the carburetor. You should attend to all of those anyway, before you give it a clean bill of health. Using 10x magnifying classes I discovered a tiny piece of fiber partially clogging the high speed jet in the carb. When the L or idle screws are not properly set, the idle RPMs fall too low, causing the engine to stalland eventually stop. 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. imagelinks[1]="http://www.ezboardwalk.com/" Prevent oil from accumulating in the engine. Yea, its not rocket science but reality. As a result, the engine runs at too high or too low RPMs. Maintenance is the key to sustenance. If it is stuck, try loosening the nut to free it up. 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. //specify corresponding links below If it still doesnt look clean, it might be time to replace it. 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. This may be one of the least anticipated causes of the problem, but it occurs in several cases. After reassembling the carburetor make sure the gaskets and seals are airtight. The saw also won't operate well at speed if the air filter or spark arrestor or carburetor are dirty. Try to make the right call based on the cost and gravity of the issue. Using compressed air, blow out the inside of the carburetor and around the gasket. LancelotLawns said: I bought a stihl bg85 blower/vacuum two days ago. For example, if the carburetor is clogged, not tuned correctly, or is contaminated, it may not be metering the right amount of fuel. random_imglink2() Check the brake band for wear and tear. So, lesser air is supplied to the carburetor and the saw bogs down. How to Adjust the Carburetor on an Eager Beaver Chainsaw. It's the carburetor's job to regulate the amount of fuel in the cylinder, and it has been preset at the factory to accomplish that task. The Forestry Forum is sponsored in part by: How Much Power Do Stihl 031 AV Chain Saws Have? The new fuel cleans everything really good and what the fuel cleans ends up in the fuel filter or the carburetor screen. Even with the tiniest passage, it can make its way towards anything, including a spark arrestor and spark plug. By: Author Olin Wade (Remodel or Move Stuff). Required fields are marked *. It should measure at 0.5 mm (0.20 in). Confirm for water and debris in your fuel tank. You are using an out of date browser. 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. 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. You can also replace the spark arrestor. 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. 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. Correcting stalling measures are generally referred to as tune-ups.These procedures help in improving your chainsaw performance. It has a new spark plug, clean air filter, n Welcome, Guest. Thank You for all replies. If the spark plug is cracked or damaged, you will need to replace it. */ This can be quite annoying, especially when you have loads of work piled up and a mechanic isnt available. imagelinks2[2]="https://www.youtube.com/c/TheForestryForum?sub_confirmation=1" If the gas is supplied to the chainsaw then the filters can clog easily. Just not sure what I am doing. Something may be amiss in the low or high speed circuit of the 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. Adjust the high-speed screw to remedy this issue. It idles fine but after you rev it up it looses power. Once the faulty seal or gasket is identified, it needs to be replaced, and the engine should be up and running. This is done by turning the air screw in either direction, depending on the engines response. The ignition system includes the spark plugs, ignition coil, and exhaust muffler. However, when your chainsaw bogs down, it turns your enjoyable day in the backyard into a complete headache. This helps identify the compression. In most cases, clogged air and fuel filters and blocked carburetor jets are causing the problem. How did you get the carb off? Move the piston up in bore a bit more so we can see the piston below the ring and turn your flash off. //-->, . The carburetor has three adjustment screws marked on it. In that case, its best to check your air filter and clean it if needed before moving on to more complex issues. Re: Chainsaw bogs on full throttle . You will also reduce kickbacks and increase the overall safety of operating your chainsaw. As a result, the fuel drawn by the carburetor reduces, causing the engine to stop running. Re: Stihl MS 180C running problems, bogging down, fuel starvation?? 0 Members and 1 Guest are viewing this topic. Locate their perfect setting at which the engine doesnt bog down when the throttle is applied. The engine boggs down under a load and when just reving the saw. 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. It's looking a little tricky to me. When the chainsaw is unable to hit full power during the full throttle, it's a good sign that your chainsaw is bogging down. We like to help other people maintaining their garden and find cool products to write about. 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. I just worked on my grandpa's ms 192t. A restricted fuel flow will reduce the power of your Stihl chainsaw. Question: What's the reason for the chainsaw to die under heavy load? Adjust the main jet by twisting the needle in either direction. They all come with their fair share of technical issues. For a better experience, please enable JavaScript in your browser before proceeding. Although Richard does focus on other home improvement tools, his focus remains on cutting fallen trees or maintaining his backyard via chainsaw tools. Proper adjustment is critical for safe operation and efficient cutting performance, and the T adjustment allows anyone to determine the accurate tension of their chainsaw chain in a matter of seconds. This dirt and debris can build up and create a clog. The dream of everyone in the lumbering field is to have a powerful and efficient chainsaw devoid of mechanical faults. #7. What causes a chainsaw to bog down when accelerating? Cleaning a carburetor on a chainsaw without removing it can be done with a few simple steps. No matter how tight the seal on the tank is, replace the gas every three months and use stabilizer. If you observe any evidence of damage or wear on the air filter, I recommended to replace it. } The rakers are angled low to high with the high end in front of the cutter. First, disconnect the spark plug wire and turn the engine off. Consult the user manual for the right ratio of gas to oil. //specify random images below. The issue of chainsaw bog down can be very calamitous, and it oozes a great deal of frustration. Turn your chainsaws bar to ensure even wear and tear. Click to see full answer. It should be the first thing to check and clean. If it needs to be cleaned, take care to not damage it by using compressed air or a soft brush. imagelinks2[1]="https://www.youtube.com/c/TheForestryForum?sub_confirmation=1" 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. Bog down is straight-up the most infuriating issue when using a chainsaw. 1 Hour1 Day1 Week1 MonthForever I would suggest that in the first instance the carburetor settings are checked. The gasoline filter can be found at the bottom of your fuel tank. :bang: I guess that all depends on your oppinion of what "compressed air" is or isn't Internal check valves? All help is appreciated. Check that the anti-vibration elements are not damaged, torn, or soft. When not constructing or remodeling X-Ray Rooms, Cardiovascular Labs, and Pharmacies, you can find him at home with wife and two daughters. Find the source of the issue and you can easily fix it. If your chain starts to spin, loosen the idler screw until it stops. In case it is not the fuel ratio, it might be dirty or clogged air filters. 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. 20,427 satisfied customers. Found the problem. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust. The chainsaw will bog down or stop running. When you depress the trigger, a vent on the carburetor opens, allowing more gas to reach the mixing chamber. This makes the engine flood and as a result, the chainsaw bogs down. For instance: It is impossible not to lose power when the firewood chainsaw is being used constantly. Furthermore, the arrestor screen that catches the spark at the exhaust port is prone to carbon deposits. 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. How do you know what the best gas-to-oil mixture is the best for your chainsaw? However, now it is acting odd. Get a carburetor repair kit before you begin clearing the blocked jets. my elevation is 640' above sea level. You should use mid-grade unleaded gasoline with a minimum octane rating of 89 and a premium two-cycle oil. 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. 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. Even without an incident of stalling, it is important to carry out regular repairs. I. Bog down is mostly experienced on full throttle. Finally, the ignition system might need to be adjusted or repaired, and for this, you should contact a professional for assistance. myimages2[3]="../../../images/top-banner/behindtheforum.jpg" Clogging slows down the engine from in-taking fuel and air, which results in a bog down at full throttle.
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