The engine needs a precise mixture of air and fuel to run efficiently, and when the ratio is off, it can bog down. To remove it you need to depress a small tab and slide the fuel line off. In some circumstances, vapor locks created in the fuel tank due to insufficient venting cause engine issues. ), Using a specialty tool called a scrench or a combination wrench, loosen the bar nuts holding the clutch cover in place, Tighten the chain tensioning screw using your combination wrench or scrench while raising the tip of the bar and, Continue to tighten the chain until there is no slack on the underside of the bar, but it can still be freely pulled by hand, Tighten the bar nuts, return the clutch cover to its rightful place, and ensure that the bar is secure. Most manufacturers do not recommend adjusting the tuning of your chainsaws carburetor outside the hands of a trained professional. Look over all cables, connections, nuts, and screws to ensure that they are not damaged and need replacement. Confirm for water and debris in your fuel tank. The inability to reach full power during a full-throttle trigger is also a sign of bogging down. You can follow these simple steps to remove and clean your chainsaws air filter: You should note that if your air filter continues to look dirty after cleaning and drying, it is time to fully replace the air filter with a new unit. Maintenance is the key to avoiding all that. 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? For a better experience, please enable JavaScript in your browser before proceeding. The remedy is to close the screw, but closing it too far is dangerous for the engine. ). 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. It's looking a little tricky to me. JavaScript is disabled. Be sure to check your models owners manual for the exact location of the fuel filter as it can vary from model to model. The manual should give you the proper gas-to-oil ratio for your particular chainsaw. Next, check the spark plug to make sure it is clean and properly connected. Tighten the idle screw with a screwdriver to fix this and see whether the engine RPMs rise. Where are these located and on what carbs? Follow the re-assembly instructions which are usually supplied with the carburetor kit (Assuming all the jet screws and small parts are accounted for).Alternatively, you can use professional help.Usually, after thorough cleaning of the carburetor and filters, your stalling issues should disappear.However, if the problem persists you may need to enlist the help of a professional. When dropping a tree, what are you guys watching?. After reassembling the carburetor make sure the gaskets and seals are airtight. I think I am having the same problem with mine. 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. This is crucial since an idle chain is extremely harmful. If your Stihl saw keeps stopping, there could be several potential causes. Over 200+ free JavaScripts here! It can turn a typical day at work or an enjoyable project into a hassle for its user. How did you get the carb off? Check the tension and condition of your chain. 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. Jul 22, 2008. random_imglink2() Its worth noting that loosening a screw improves the fuel flow rate and enriches the mixture while tightening the screw has the reverse effect. For professionals and homeowners, taking care of their chainsaws is very important. document.write('') Cleaning it by immersing it in a soap water solution is preferable. 2023 "Chainsaw Guru". L and H on your chainsaw. I tried putting new gas in it and starting it up but it didn't make a difference. Furthermore, the arrestor screen that catches the spark at the exhaust port is prone to carbon deposits. Be sure that your oiler is adequately lubricating your bar and chain. He pledges to come up with new knowledge about chainsaws every once in a while. The saw also won't operate well at speed if the air filter or spark arrestor or carburetor are dirty. 20,427 satisfied customers. 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.. Suppose that your chainsaws fuel mixture is correct, and youre still experiencing a lag in performance. var imagelinks2=new Array() Gum clogs fuel lines and carburetor.The end result is less supply of fuel for complete combustion to run the saw. 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. If the problem persists, inspect the fuel lines and ignition system. This issue can be fixed with the help of the user manual you received with the chainsaw. To ensure any residue is removed, spray the inside of the carburetor with carburetor cleaner and scrub with a stiff brush. There are three adjustment screws on the carburetor: low-speed (L), high-speed (H), and idling (I). To unclog the spark arrestor, remove it and clean it with a wire brush. The stihl oil from the dealer will have stabilizer already in it, they will usually tune it for you for free (only if you bought it there) I assume you checked/cleaned your air filter. As a result, the chainsaw will bog down at full throttle. Remove the carburetor and check it for damage, cleaning it if necessary. Cleaning the air filter and spark arrestor with, Read More Chainsaw Bogs Down When CuttingContinue, Did you buy a new Stihl chainsaw, remember you cannot go and start using it like any old chainsaw. 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. If your chainsaw doesnt start, adjust the carburetor screws till it doesnt bog down. The Author The dream of everyone in the lumbering field is to have a powerful and efficient chainsaw devoid of mechanical faults. This dirt and debris can build up and create a clog. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. I have never worked on anything this saw. This can also be caused by bad fuel. If it needs to be cleaned, take care to not damage it by using compressed air or a soft brush. Clean your spark plug and measure the gap. */ There is no hiding from dirt. The best way to clean the spark arrestor screen is to unplug the spark plug wire and use a metal brush. The carburetor might need: A clean-up if it's clogged. The consent submitted will only be used for data processing originating from this website. Clear all dirt and debris from the saw body, chain, and bar. 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. As mentioned before, most chainsaws will run on one of three gas and two-cycle engine oil mixtures. I take off everything can come off. I think the problem is ethanol in gas, espesially 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 your chainsaws carburetor is not clogged, the tuning of your carburetor may be to blame. This can be done with a vise, clamps, or any type of fastener that will stabilize your chainsaw. Tips from a Professional. 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. Check for any loosened nuts or screws and retighten if needed. #1. If these steps do not solve the problem, you should take the chainsaw to a professional for servicing or further diagnosis. Check the return/recoil spring and starter. 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. This makes the engine flood and as a result, the chainsaw bogs down. Bog down is straight-up the most infuriating issue when using a chainsaw. Inspect the spark plug and replace it if necessary. The removal of the carburetor fuel line is very sensitive.Make drawings drawing on the lines connections to allow easy re-assembly. 2. Next, check the spark plug to make sure it is clean and properly connected. It could even bog down when given gas. 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. Adjust the air screw until the idle speed is consistent. Turning the knob will either tighten or loosen the chain, depending on the direction the user turns the knob. I took it back to the dealer and he said he adjusted something and handed back saying it would work fine. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Because of continuous firing, the spark plugs electrodes become damaged or acquire carbon deposits, reducing spark quality. I'm having trouble with my Stihl MS180 C-BE chainsaw. If you don't keep the blade oiler reservoir filled, you will have dulled blades, damaged bars, and generally poor performance. The standard compression reading required for most 2-cycle chainsaw is around 100-110 psi to start. Clean or replace filters located in the fuel tank of your chain saw. The inability to reach full power during a full-throttle trigger is also a sign of bogging down.Remedy this by adjusting the high-speed screw. A carburetor is a part of a combustion motor that mixes air and fuel in a specific ratio for combustion. I think I am having the same problem with mine. If the chainsaw continues to stall, the issue could be with the low-speed and idle screws, which should be adjusted. The saw has been well used over the years (1998) and not really well looked after. Hence, many people complain- chainsaw bogs down when I give it gas . The engine and its associated delivery system need to be airtight to maintain adequate temperature and pressure. 453 S Spring St Ste 400 If the spark plug is fouled, it means that it is unable to ignite the fuel being provided to the cylinder. 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. On the first day the crew used it, it was bogging down. 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. 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. Required fields are marked *. Anobstruction in any of these components may disrupt the fuel flow to the engine, leading to the engine bogging down while idling. 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. before starting the process. 30:1 is recommended mostly for older models. 0 Members and 1 Guest are viewing this topic. Curtis B. Here are the solutions for common reasons why chainsaw bogs down after giving it gas - 1. So I am just wondering how to go about pulling the carb off the easiest way to check out the jets. Re: Chainsaw bogs on full throttle . If your chainsaw cannot get enough of either one of those critical components, it will cause the motor to stall. The effect of air leakage is that it upsets the composition of the air-fuel mixture. A restricted fuel flow will reduce the power of your Stihl chainsaw. Make sure they are closed at a distance and neither touching the engine and not too far from it. 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. Required fields are marked *. Just not sure what I am doing. It will start up with some work, but it idles for a couple seconds then dies most of the time, and when it doesn't die on its own, it dies when I try to give it any gas. 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. Find the source of the issue and you can easily fix it. 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.
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