Once youve made the adjustments, make sure to monitor the performance of your saw over the next few days and readjust if necessary. Remedy this by adjusting the high-speed screw. myimages2[2]="../../../images/top-banner/behindtheforum.jpg" This can usually be done by turning the adjustment screw clockwise. Required fields are marked *. Adjust the high-speed screw to remedy this issue. A Detailed Guide, What Size Chainsaw Do I Need in 2023? 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). . Select gasoline with a minimum octane rating of 89 and a maximum ethanol content of 10%. 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. 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. The engine needs a precise mixture of air and fuel to run efficiently, and when the ratio is off, it can bog down. Started by ellinghamso 1 Hour1 Day1 Week1 MonthForever 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. Curtis B. Detailed Answer. There are many factors that cause a bog down, but mostly it is the carburetor orientation or blockage. The new fuel cleans everything really good and what the fuel cleans ends up in the fuel filter or the carburetor screen. //-->. Chainsaw starts but dies when I give it gas. What it needs is proper maintenance on a daily, weekly, and monthly basis. Thank You for all replies. Guess its time to pull the carby down and check the diaphragm and mesh. Bog down can also occur in the case of a dirty air filter, spark arrestor, or carburetor. Make sure to properly lubricate your chain with chain oil and check the compression in the cylinder. The gasoline filter can be found at the bottom of your fuel tank. My Chainsaw Bogs Down When I Give It Gas; Causes and Solutions [2023]. Additionally, if the air filter is dirty or blocked, that can also lead to a bogging issue. Move the piston up in bore a bit more so we can see the piston below the ring and turn your flash off. Obviously pull the carb and exhaust when you do this. This is usually behind the air filter, but if you have trouble locating it, consult your user manual. 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. We are compensated for referring traffic and business to Amazon and other companies linked to on this site. Check the fuel tank for the correct fuel and oil mixture, filling it up if necessary. Replace it if the quality has deteriorated. Ben has a bachelors degree in construction engineering. */ It's a small screen you can simply pull out after removing the muffler cover. (3 Common Causes). A daily, weekly, and monthly check-up and cleaning must be performed for optimal performance. Re: Chainsaw bogs on full throttle . 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. ), Woodmizer LT-40-HD http://www.welshtreeservice.com. Most Craftsman models have either a standard Walbro or a Zama carburetor. 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. You will need to position your file depth gauge so that the arrows are pointing toward the nose of the chainsaw bar. The best way to clean the spark arrestor screen is to unplug the spark plug wire and use a metal brush. The spark plugs spark quality degrades over time, making it impossible to ignite the air-fuel mixture in the combustion chamber. Find the screw to adjust the idle speed. Top 11 Best Chainsaw Sharpener Tested for Sharpening 2023, How do Chainsaw Chaps Work? After I got home I remover the spark plug and looked in there and everything looks good. Solution: Here's the solution. It is responsible for mixing fuel and supplying it to the engine. 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. 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" First, be sure to read your chainsaws manual to determine whether you need specialized tools to disassemble the carburetor. Inspect the spark plug and replace it if necessary. It requires an 8mm or 5/16" nut driver or wrench. Take them out and clean them using a delicate brush. These screws are in charge of regulating the fuel flow to the carburetor under varied load circumstances. imagelinks[1]="http://www.ezboardwalk.com/" By: Author Olin Wade (Remodel or Move Stuff). Using a screwdriver, remove the air filter cover on the back of your chainsaw. Fix your Lawnmower with our Lawnmower Troubleshooting tool. (Even After Sharpening). Bogging down is a universally hated issue by everyone and anyone who uses a chainsaw. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. To identify air leakage, you will need to perform a pressure test on your chainsaw. 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. Adjusting the idle screw, for instance, is a corrective measure for a chainsaw stalling when idle. If your chainsaws carburetor is not clogged, the tuning of your carburetor may be to blame. First, remove the old fuel line from the fuel tank. 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. 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. It has a new spark plug, clean air filter, n Welcome, Guest. If the fuel mix is old or has not been adjusted properly to the manufacturers specifications, refresh it or adjust it. Using 10x magnifying classes I discovered a tiny piece of fiber partially clogging the high speed jet in the carb. If your chainsaw bogs down after pulling the throttle, the air/fuel delivery system needs to be examined. Chainsaw Vapor Lock. var imagelinks=new Array() Here are the solutions for common reasons why chainsaw bogs down after giving it gas - 1. If it needs to be cleaned, take care to not damage it by using compressed air or a soft brush. A new chainsaw has some protocols to follow. Confirm for water and debris in your fuel tank. Correcting stalling measures are generally referred to as tune-ups.These procedures help in improving your chainsaw performance. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust. There is no hiding from dirt. Oct 29, 2011. A well-maintained chain-saw seldom stalls. I. 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. He pledges to come up with new knowledge about chainsaws every once in a while. An example of data being processed may be a unique identifier stored in a cookie. The engine boggs down under a load and when just reving the saw. Random Image Link Script- By JavaScript Kit(http://www.javascriptkit.com) The air supply is equally as important as fuel for a combustion engine. Dont forget that a maintained chainsaw is a working chainsaw! 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. The carburetor must be maintained, but first, check that your engines filters are thoroughly cleaned. After reassembling the carburetor make sure the gaskets and seals are airtight. ). 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.. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust. Firstly, what instigates the chainsaw Bog down? Working outdoors can be such a cathartic experience. 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. Correct mixing of fuel ingredients. It should be the first thing to check and clean. The reason could be that you are using the Stihl saw at an altitude, or the carburetor adjustment might have slipped and required fixing. I didn't run straight gas through it and it isn't sized up so I am wanting to dig into the carb myself. The last thing anyone wants is a saw that purrs when idling and bogs down when applying gas. Cleaning it by immersing it in a soap water solution is preferable. After checking that, soak the crank seals in motor oil (30w works great) and then give it a go. In some circumstances, vapor locks created in the fuel tank due to insufficient venting cause engine issues. If t present cleaning your tank isnt an option. Any factor that might affect supply can cause the chainsaw to bog down. Lock the chain brake by pushing the handle forward. Next, spray a carburetor cleaner into the throat of the carburetor on the side opposite the air filter and throttle linkage. 4. By properly troubleshooting and addressing any potential causes, you can prevent stalling or restarting problems with your Stihl saw. Once the faulty seal or gasket is identified, it needs to be replaced, and the engine should be up and running. The standard compression reading required for most 2-cycle chainsaw is around 100-110 psi to start. After checking and cleaning the filters, see if the carburetor orientation is proper. Check the spark plug as well to examine the ignition system. Tips from a Professional, Chainsaw Starts but Wont Idle. 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. To unclog the spark arrestor, remove it and clean it with a wire brush. Adjust the idle speed. Correct some carbs can be damaged by compressed air. Any of these could be a contributor to a chainsaw that's bogging down. Using compressed air, blow out the inside of the carburetor and around the gasket. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust . By a silver star and you can post unlimited pictures. This dirt and debris can build up and create a clog. In that case, its best to check your air filter and clean it if needed before moving on to more complex issues. Next, youll need to gather the right supplies for the job at hand. Unscrew the carburetor cover and expose the main jet. 3. You will also reduce kickbacks and increase the overall safety of operating your chainsaw. Knowing how to mix fuel properly is the first step to ensuring that your chainsaw will stay up and running for years to come. This jet is usually responsible for controlling the fuel/air mixture. 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. The fuel lines or ignition system may have beenaffected if the problems continue despite adjustment. The consent submitted will only be used for data processing originating from this website. Why Is My Chainsaw Bogging Down? 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. 5. Turn your chainsaws bar to ensure even wear and tear. Mix in a premium 2-cycle oil that is ISO-L-EGD and JASO M345 FD certified. Why does the Husqvarna chainsaw bog down at full throttle? If your chainsaw wont stay running, there are several steps you can take to try and fix it before seeking professional help. If the spark plug is cracked or damaged, you will need to replace it. Any factor that might affect supply can cause the chainsaw to bog down. If your chainsaws carburetor becomes clogged with dirt and debris, airflow is restricted and the chainsaws engine suffers. Carb. After considerable usage, specific engine components like the crank seals and the head gaskets wear out and develop leakages. When not constructing or remodeling X-Ray Rooms, Cardiovascular Labs, and Pharmacies, you can find him at home with wife and two daughters. Inspect the fuel line condition. A dirty or damaged spark plug can cause it to misfire causing the string trimmer to run rough. Jul 22, 2008. 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. I have never worked on anything this saw. Found the problem. 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. I would suggest that in the first instance the carburetor settings are checked. Clear all dirt and debris from the saw body, chain, and bar. removed it and saw functions perfectly. Then, remove the air filter and fuel filter. Air Filter Issues. These are the low-speed screw (L), the idle screw (I), and the high-speed screw (H). The Low Speed is the setting I do 1st in or out a 1/4 turn to ensure no hesitation . On the High speed setting ensure that you do not have it running to lean (MAX RPM) I usually suggest max RPM (once warmed up) then turn it out until it diesels and then 1/8 turn in (leaner) . Sometimes the L adjustment is insufficient, and you must tweak your fuel delivery components, specifically the carburetor and filters. 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. A Stihl chainsaw can bog down for a variety of reasons. Make sure to take out the spark plug before removing the filter. Take a measuring beaker and add oil and gasoline of the required amount according to the model of your chainsaw. Trying that is by using Stihl Ultra bottles and pouring a little less but I always have some left over gas in the can. Being in the cutting services for more than 10 years, I know a thing or two about chainsaw. Fuel stabilizers are a must-have for any chainsaw owner who fanciesleaving their equipment idle.They help prevent gum formation in fuel tanks. If user's chainsaw is bogging down than this is often a sign of improper gas-to-oil ratio. Re-attach the carburetor cover and test the saw. Clogging slows down the engine from in-taking fuel and air, which results in a bog down at full throttle. All STIHL gasoline-powered engines can be used with up to a 10% (E10) blend of ethanol in the gasoline/engine oil mix. Don't know how to post a pic of it on here. Even with the tiniest passage, it can make its way towards anything, including a spark arrestor and spark plug. Sounds like a blocked passage somewhere to me. Next, check the spark plug to make sure it is clean and properly connected. Proceed with adjusting the carburetor adjustment screws to fix a chainsaw that wont start. It has the exact ratio requirement of gas and oil for your specific model. 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. Ozito 25.4 cc 305 bar, starts, easily & comes off choke & idles, will rev up on the ground, pick it up off the ground & it dies & stops, Put back on read more. 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. I take off everything can come off. Aside from the screw setting, you need to check and make sure that the spark plug is in prime working condition. If the compression is low, you should clean and check for any damage or wear. 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. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Prevent oil from accumulating in the engine. If binding/catching occurs, or if the motor does not return to an idle state, your chainsaw needs to make a visit to a service provider before being used again. The imbalance of these components is one of the major reasons for bogging down. Los Angeles, CA 90013 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. This article will help you fix your chainsaw by yourself that starts well but dies just after you push the throttle. 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. The new fuel doesn't really clog the carbs. Dirt in the air filters This is one of the biggest culprits when dealing with chainsaw bogging down. Then there's the problem of wood binding. 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. As a result, the chainsaw will bog down at full throttle. The first step is to make sure that your chainsaw has enough fuel. myimages[6]="../../../images/top-banner/EZ-junior.jpg" Make sure that its leveled and does not tilt. There are a number of carburetor-related problems. In most models, it can easily be located by taking off the top cover. Question: What's the reason for the chainsaw to die under heavy load? Adjusting the H screw will help achieve optimal performance. How to Adjust the Carburetor on an Eager Beaver Chainsaw. You should use mid-grade unleaded gasoline with a minimum octane rating of 89 and a premium two-cycle oil. If the spark plug is cracked or damaged, you will need to replace it. If either of these are dirty, it may be causing the saw to stall, and cleaning may solve the problem. 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. Check that the anti-vibration elements are not damaged, torn, or soft. The use of stale ethanol-blended fuel, which creates sticky white deposits over time, is the most typical source of such clogs. Although Richard does focus on other home improvement tools, his focus remains on cutting fallen trees or maintaining his backyard via chainsaw tools. There are several factors may make your saw not work properly. I think the problem is ethanol in gas, espesially gas . Inspect the clutch center, drum, and spring for any excessive wear. Or maybe gas varnish in the screen filter at the base of the metering needle. If this is the case, the only alternative is to replace the spark plug. 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. myimages[4]="../../../images/top-banner/ez50-banner.jpg" imagelinks2[3]="https://www.youtube.com/c/TheForestryForum?sub_confirmation=1" Check for any fuel leaks from the motor, fuel tank, or fuel lines. As a landscape builder, he helped establish two gardening companies. var myimages=new Array() 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. Fill the tank with the prescribed gas-to-oil ratio. It's 14in bar and chain, with a new chain on the saw. When a clog occurs, your engine will not get enough air to operate effectively. Maintenance is the key to sustenance. Your chainsaws fuel supply system comprises the gasoline tank, fuel filter, fuel lines, and carburetor. Use low pressure compressed air, and a stiff paint brush bristle to check them all. Check the brake band for wear and tear. Align the screws on the carburetor. L and H on your chainsaw. Chain-saw requires constant maintenance to be efficient. To remove it you need to depress a small tab and slide the fuel line off. Will start, sound fine, and work for a couple of minutes, until it gets warm. They are Sthil chains. I took it back to the dealer and he said he adjusted something and handed back saying it would work fine. Its all clean just a blackish color. 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. To keep your chainsaw running smoothly, you should service it regularly and keep up scheduled maintenance visits with a reputable, authorized chainsaw service center. Take the appropriate screwdriver and align them. Tighten the idle screw with a screwdriver to fix this and see whether the engine RPMs rise. Wash it in soapy water with a soft-bristle brush. Garden Tool Expert To check if theres a vapor lock, unscrew the tanks cap and put it back on again. It can turn a typical day at work or an enjoyable project into a hassle for its user. 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. As a preventative measure, always keep your tank vents clean. Over time, the spark arrestor can become clogged with soot. Clogging usually occurs due to long working hours. If your chainsaw is bogging down, one of these critical components isnt in its correct balance. 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. 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.