Take great care in removing the smaller parts and remove any debris or build up in the carburetor. If the kit comes with welch plugs I take those out too. Take a measuring beaker and add oil and gasoline of the required amount according to the model of your chainsaw. There are several factors may make your saw not work properly. Also, use a clean cloth and some carburetor cleaner to wipe down the inside of the carburetor. 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. Clean both of these components if they are dirty. The engine needs a precise mixture of air and fuel to run efficiently, and when the ratio is off, it can bog down. 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. Let the chainsaw cool down if there's excessive smoke release or the chainsaw got heated up. Prevent oil from accumulating in the engine. Any factor that might affect supply can cause the chainsaw to bog down. Following the L modification, the mixture composition should be adequate to keep your engine running. Before tossing your chainsaw in the shed, there are a few simple things you should do to ensure the longevity and productivity of your tool. 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. 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. 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. Firstly, what instigates the chainsaw Bog down? A dirty or damaged spark plug can cause it to misfire causing the string trimmer to run rough. This article will help you fix your chainsaw by yourself that starts well but dies just after you push the throttle. Re: Chainsaw bogs on full . Also, check the lubrication hole for debris and clean your bar groove. Although Richard does focus on other home improvement tools, his focus remains on cutting fallen trees or maintaining his backyard via chainsaw tools. 01 - Stihl Chainsaw Spark Arrestor. With the carb apart, make sure all the passages are clear. If youre finding your chainsaw to be bogging down, check the issues mentioned above to see if you can save yourself a little time and money. #7. If the carburetor is clogged or not adjusted properly, it can cause the saw to run out of fuel. You must locate the perfect setting at which the engine won't stop once the throttle is applied. It bogs down it seems and stalls out when I open the throttle. If your chain starts to spin, loosen the idler screw until it stops. If your chainsaw is bogging down when you press the throttle, it can be a sure sign of an incorrect gas-to-oil ratio. myimages[4]="../../../images/top-banner/ez50-banner.jpg" 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. Why doesmy Chainsaw Startand then Stop. And these issues can be solved if the problem is identified. It may not display this or other websites correctly. We and our partners use cookies to Store and/or access information on a device. I do sharpen the chains myself using an Oregon 511A. If any part of that ratio is off (as previously mentioned), your chainsaw will experience a lag in performance. This makes the engine flood and as a result, the chainsaw bogs down. Over time, the spark arrestor can become clogged with soot. skytower, Oct 3, 2010. 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 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. The engine boggs down under a load and when just reving the saw. These screws are in charge of regulating the fuel flow to the carburetor under varied load circumstances. 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.. Additionally, the choke might be stuck in either the open or closed position and preventing the engine from running properly. I will try to figure out how to get the carb off tomorrow morning. imagelinks[1]="http://www.ezboardwalk.com/" Don't know how to post a pic of it on here. Fuel stabilizers are a must-have for any chainsaw owner who fanciesleaving their equipment idle.They help prevent gum formation in fuel tanks. Jun 16, 2006. Associate Degree. 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. When the L or idle screws are not properly set, the idle RPMs fall too low, causing the engine to stalland eventually stop. on Chainsaws, Started by bkkraft It may not display this or other websites correctly. When the mixture in the carburetor is too lean, the engine races and overheats and the piston can seize. As mentioned before, most chainsaws will run on one of three gas and two-cycle engine oil mixtures. */ As a result, the fuel drawn by the carburetor reduces, causing the engine to stop running. //specify corresponding links below (Read 66824 times) (Read 66824 times) 0 Members and 2 Guests are viewing this topic. Why does my Stihl chainsaw bog down when I give it gas? For professionals and homeowners, taking care of their chainsaws is very important. When a screw (e.g., anL screw) is tightened, the fuel flow to the carburetor is restricted, causing the mixture to be lean. 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. Adjust the main jet by twisting the needle in either direction. imagelinks[4]="http://www.ezboardwalk.com/" 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. This is usually behind the air filter, but if you have trouble locating it, consult your user manual. before starting the process. Cleaning Tips The goal when diagnosing issues with bogging down is to implement a quick fix and avoid any disassembly (like the carburetor). The gasoline filter can be found at the bottom of your fuel tank. The speed would be perfect, and there would be no unusual sound when the screws are properly aligned. How to Prevent Your Chainsaw from Bogging Down For the spark plug, use a delicate brush, a wire, or a plug spray-on to clean off the thick carbon. 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? If your chainsaw is bogging down when you press the throttle, it can be a sure sign of an incorrect gas-to-oil ratio. 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. If you observe any evidence of damage or wear on the air filter, I recommended to replace it. 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. Found the problem. 20,427 satisfied customers. 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 engine and its associated delivery system need to be airtight to maintain adequate temperature and pressure. If the air filter is clean, then the spark plug should be cleaned and gap adjusted to the manufacturers specifications. Remedy this by adjusting the high-speed screw. I hope my epic guides will help you to choose,buy and maintain chainsaw. Then, remove the air filter and fuel filter. JavaScript is disabled. Chainsaw bogs on full throttle #63708 18/04/15 11:39 PM. Where are these located and on what carbs? Jul 22, 2008. So, lesser air is supplied to the carburetor and the saw bogs down. 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. Confirm for water and debris in your fuel tank. After checking that, soak the crank seals in motor oil (30w works great) and then give it a go. 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. Tuning of the screws to adjust and align them. or a blockage in the mesh strainer in the pump chamber. Knowing how to mix fuel properly is the first step to ensuring that your chainsaw will stay up and running for years to come. Clogging usually occurs due to long working hours. So I am just wondering how to go about pulling the carb off the easiest way to check out the jets. Bogging down is a universally hated issue by everyone and anyone who uses a chainsaw. If your chainsaw bogs down at full throttle, the air filter and . Next, you should check the air filter to make sure it is clean and not blocked by dirt or debris. Bog down is mostly experienced on full throttle. 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. What Would Cause a STIHL Trimmer to Not Start? Since the engine turns off shortly after starting your weed eater, the idle speed may just be too slow. If the spark arrestor is clogged, the chainsaw may run stall or run rough. Required fields are marked *. document.write('') Remove the air filter from its housing using a screwdriver. Unscrew the carburetor cover and expose the main jet. 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. On the first day the crew used it, it was bogging down. Finally, check the choke. 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. You are using an out of date browser. Over 200+ free JavaScripts here! Once complete, start the engine and check to make sure the chainsaw is now running correctly. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Re-attach the carburetor cover and test the saw. This is crucial since an idle chain is extremely harmful. The ignition system includes the spark plugs, ignition coil, and exhaust muffler. You may have to look beneath the air filter or in the Users Manual for your saws model number. Check the brake band for wear and tear. For that you require a carburetor cleaner. Continue with Recommended Cookies. My name is Chris Ross. Random Image Link Script- By JavaScript Kit(http://www.javascriptkit.com) Additionally, it is a good idea to check the spark plug to make sure it is in good condition. Another plausible explanation for the stalling is attributed to the percentage of ethanol in the fuel.Ethanol readily vaporizes and combines with water in the air to form water.This water stops combustion which is necessary for running the motor.Experts counsel that fuel containing up to 10% ethanol has a tendency to separate varnishes from the gas, resulting in accumulation in fuel lines and tank.The residue counters combustion in the carburetor. The issue of chainsaw bog down can be very calamitous, and it oozes a great deal of frustration. Page created in 1.341 seconds with 39 queries. The removal of the carburetor fuel line is very sensitive.Make drawings drawing on the lines connections to allow easy re-assembly. The standard compression reading required for most 2-cycle chainsaw is around 100-110 psi to start. My Chainsaw Bogs Down When I Give It Gas; Causes and Solutions [2023]. Stihl ST251C Chainsaw Stalls when I depress the throttle. Adjust the high-speed screw to remedy this issue. When dropping a tree, what are you guys watching?. If the fuel mix is old or has not been adjusted properly to the manufacturers specifications, refresh it or adjust it. Tighten the idle screw with a screwdriver to fix this and see whether the engine RPMs rise. There are a number of carburetor-related problems. If you don't keep the blade oiler reservoir filled, you will have dulled blades, damaged bars, and generally poor performance. Updated: 00/04/25 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. Get a carburetor repair kit before you begin clearing the blocked jets. Find the source of the issue and you can easily fix it. Dirty filters are the main problem. A chainsaw is a tool, and no tool is perfect. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. Yea, its not rocket science but reality. Using 10x magnifying classes I discovered a tiny piece of fiber partially clogging the high speed jet in the carb. 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. The majority of these steps are listed above in the daily maintenance list, but one is of top priority: Chainsaws require maintenance to stay at the top of their game. I have never worked on anything this small. First, youll need to pull out your reading glasses and take a look at your chainsaws owners manual. } Dont forget that a maintained chainsaw is a working chainsaw! 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. Turning the knob will either tighten or loosen the chain, depending on the direction the user turns the knob. Your manual will provide detailed instructions on how to do this. It is difficult to get the proper high-speed adjustment by ear -- most pros use a tachometer. To rule out any of these as a potential cause, its important to first check the air filter. Updated: 00/04/25 Test your stop switch to make sure that it completely stops the motor. Bog down can also occur in the case of a dirty air filter, spark arrestor, or carburetor. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust. Allow the cleaner to sit for five to 10 minutes and then wipe away with a cloth. After the overhaul of the piston assembly I used this saw to cut up three rather large downed trees, and some other work. However, now it is acting odd. The saw has been well used over the years (1998) and not really well looked after. After this, check the air filter and carburetor for dirt and debris. After considerable usage, specific engine components like the crank seals and the head gaskets wear out and develop leakages. Additionally, if the air filter is dirty or blocked, that can also lead to a bogging issue. To do this: Loosen each bolt about half way down using flathead screwdriver or small wrench (depending on size). When your saw blade starts to dull, your blade will start producing powder, rather than chips. Disengage the chain brake and manually advance through the chain until you reach your starting point mark. No matter how tight the seal on the tank is, replace the gas every three months and use stabilizer. Location. 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. Check cooling fins on the cylinder and clean if needed. It is also its orientation that keeps it working smoothly on little or full throttle. While you are in there, check the spark arrestor screen to make sure it is clear and that there is not any debris clogging it. Question: What's the reason for the chainsaw to die under heavy load? It is recommended to replace the fuel filter every year to ensure optimal performance and avoid any possible issues. Stihl carburetors have three adjustment screws. If the spark plug is cracked or damaged, you will need to replace it. You will need a round file that matches the diameter of your cutters, a flat file, a file guide, and a depth-gauge guide. How did you get the carb off? If your chainsaw doesn't start, adjust the carburetor screws till it doesn't bog down. It idles fine but after you rev it up it looses power. We like to help other people maintaining their garden and find cool products to write about. Here are the solutions for common reasons why chainsaw bogs down after giving it gas - 1. This issue can be fixed with the help of the user manual you received with the chainsaw. They all come with their fair share of technical issues. 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. This can usually be done by turning the adjustment screw clockwise. Use a 50:1 gas-to-oil mixture in your 2-cycle Stihl chainsaw. I ask if they checked the carb and they said no. It's 14in bar and chain, with a new chain on the saw. Now, remove the filter and clean the dust buildup using a brush. 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? For a detailed answer, read the causes section above. Remove the filter from the tanks bottom and clean the stale gasoline deposits from the filters jets with a metal wire. The main reason for an ECHO chainsaw to bog down is the dirty spark arrestor. 1 Hour1 Day1 Week1 MonthForever Align the screws on the carburetor. You can have as many as you wish If your chainsaw is bogging down, one of these critical components isnt in its correct balance. 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. Over 200+ free JavaScripts here! Drain the fuel tank and store the gasoline in an appropriate container before bringing it out. Check the edges of the bar for burs and file off if needed. Please loginor register. If the spark plug is physically damaged, replace it. 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. As a result, the chainsaw will bog down at full throttle. How did you get the carb off? on Chainsaws. Even if you are a novice chainsaw operator, these spark plugsshould be updated at least once a year. The inability to reach full power during a full-throttle trigger is also a sign of bogging down. The engine should start by now. Spark arrestor is usually placed behind muffler, so locating it is not that hard. Chainsaw starts but dies when I give it gas. Technician. Stihl chainsaw engine ( motor ) bogging down things to check first. The spark arrestor is a small screen that prevents the engine from emitting sparks. 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. Any factor that might affect supply can cause the chainsaw to bog down. Go ahead and buy a new fuel filter. Cant get a good picture becouse of the glare of the piston. It runs fine at all other times, cuts well and has good power. Why does the ECHO chainsaw bog down when cutting? From falling trees to slicing timber, the chainsaw is a necessity - especially if you are in the lumber industry. 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. Detailed Answer. var imagelinks2=new Array() Nearly every weekend you will find us doing small or big jobs or just enjoying our garden. 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. To unclog the spark arrestor, remove it and clean it with a wire brush. 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. I doubt it has more than four or five hours on it. 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. Always clean the outside of your chainsaw after using it to remove any dust or debris that may be present. 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. File every other cutting tooth with smooth, even, pushing strokes, keeping the round file at a 90-degree (right angle) to the rollers. Other potential causes of bogging may include a spark plug that needs replacing, fuel that has gone bad, incorrect fuel-oil mixture, chain that is too tight, or even an over-revved engine. removed it and saw functions perfectly. New Husqvarna 550XP had to be reprogrammed. 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. 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. If the spark plug is cracked or damaged, you will need to replace it. ), Woodmizer LT-40-HD http://www.welshtreeservice.com. If the spark plug is fouled, it means that it is unable to ignite the fuel being provided to the cylinder. Then there's the problem of wood binding. Older saws have degraded lines which need replacement. Frustrating, right? Aside from the screw setting, you need to check and make sure that the spark plug is in prime working condition. Curtis B. If the spark arrestor is clogged, the chainsaw may run stall or run rough. myimages2[3]="../../../images/top-banner/behindtheforum.jpg" 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. 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. This is partly due to clogged filters resulting from long working hours and less air supply to the carburetor (which will be discussed later). ( 2 cents) the new gas seems to clog small motors Mike. Together we put a lot of effort into the maintenance of our gardens over the last few years, we become obsessed with it. If the idle screw is too loose, the mixture will be too rich, and the chainsaw will not run at all, even at idling. :bang: I guess that all depends on your oppinion of what "compressed air" is or isn't Internal check valves? I have cleaned the air filter, replaced the fuel filter to no effect. Check the fuel hose, famous for cracking. Dirty Spark Plug Causes a String Trimmer to Run Rough. Lastly, you should clean the air filter and replace it if necessary. This dirt and debris can build up and create a clog. The imbalance of these components is one of the major reasons for bogging down. Use a starting fluid and letting it run flushes gunk out of the jets as an alternative to rebuilding the carburetor.