By: Author Olin Wade (Remodel or Move Stuff). can cause a chainsaw to bog down when cutting. The Basics Explained, Can a Concrete Chainsaw Cut Through Rebar? These deposits affect the engines operation and may cause your chainsaw not to start. I hope my epic guides will help you to choose,buy and maintain chainsaw. Solution: Here's the solution. For a better experience, please enable JavaScript in your browser before proceeding. 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. 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. 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. To identify air leakage, you will need to perform a pressure test on your chainsaw. Chain filing isnt a difficult task and is crucial in maintaining your chainsaw. A dirty arrestor, on the other hand, is the cause of overheating your experience in a bog down. The standard compression reading required for most 2-cycle chainsaw is around 100-110 psi to start. 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. Chainsaws can start and then stop for a variety of reasons, so its important to take the time to diagnose the problem before attempting to start it again. In order to properly access the carburetor and get at its internal components, youll then need to disassemble the carburetor. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust. 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 consent submitted will only be used for data processing originating from this website. Question: What's the reason for the chainsaw to die under heavy load? Use low pressure compressed air, and a stiff paint brush bristle to check them all. First, remove the old fuel line from the fuel tank. 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. Start by identifying the carburetor on your saw. The air supply is just as important as a fuel supply in any internal combustion engine. Most engine problems can be solved with the previously mentioned adjusting procedure. 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. It has a new spark plug, clean air filter, n Welcome, Guest. Confirm for water and debris in your fuel tank. myimages[6]="../../../images/top-banner/EZ-junior.jpg" On the first day the crew used it, it was bogging down. 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. +1-213-221-0119, By using this website I agree with the Disclaimer. Next, you should check the air filter to make sure it is clean and not blocked by dirt or debris. 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. If your chainsaw wont stay running, there are several steps you can take to try and fix it before seeking professional help. It may not display this or other websites correctly. 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. Why Is My Chainsaw Bogging Down? Then there's the problem of wood binding. That explains why they run worse after i rebuild them! 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. Tuning regulates the flow of fuel through the might be the last resort and for that, always seek professional help. Wash it in soapy water with a soft-bristle brush. 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. I have ran many 2 stroke motor cycles and atv's and feel as though its a carb problem. Remove the filter from the tanks bottom and clean the stale gasoline deposits from the filters jets with a metal wire. The H side means the high side and its adjustment.It is used to regulate the quantity of fuel that flows through the carburetor during fast paced RPMS.The L side of the chainsaw means the low side and it is used in adjusting the flow of fuel in the carburetor when there is a low RPM. It is experienced during welding, idling, or full throttle. Using compressed air, blow out the inside of the carburetor and around the gasket. For the spark plug, use a delicate brush, a wire, or a plug spray-on to clean off the thick carbon. Clear all dirt and debris from the saw body, chain, and bar. I didn't run straight gas through it and it isn't sized up so I am wanting to dig into the carb myself. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Bog down can also occur in the case of a dirty air filter, spark arrestor, or carburetor. When not constructing or remodeling X-Ray Rooms, Cardiovascular Labs, and Pharmacies, you can find him at home with wife and two daughters. Locate all the screws on the carburetor and check if they are all aligned. Los Angeles, CA 90013 If it still doesnt look clean, it might be time to replace it. Clean and/or replace the spark arrestor screen. Clogging usually occurs due to long working hours. If your chainsaw is bogging down when you press the throttle, it can be a sure sign of an incorrect gas-to-oil ratio. 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. Chainsaw starts but dies when I give it gas. If your chainsaw bogs down at full throttle, the air filter and . Secure your chainsaw to maintain stability while working. on Chainsaws. My name is Ben, and growing up, I practically lived in my parents' backyard. Why does my chainsaw stall when gas is given? Your email address will not be published. Fuel stabilizers are a must-have for any chainsaw owner who fanciesleaving their equipment idle.They help prevent gum formation in fuel tanks. California. Always clean the outside of your chainsaw after using it to remove any dust or debris that may be present. Stihl ST251C Chainsaw Stalls when I depress the throttle. Be sure that your oiler is adequately lubricating your bar and chain. Rotate the fuel supply lever and keep it in the on position while you spray the carburetor cleaner. The effect of air leakage is that it upsets the composition of the air-fuel mixture. #1. var ry=Math.floor(Math.random()*myimages2.length) Finally, replace the fuel filter and air filter and reconnect the spark plug. imagelinks[6]="http://www.ezboardwalk.com/" The engine needs a precise mixture of air and fuel to run efficiently, and when the ratio is off, it can bog down. As a result, the engine runs at too high or too low RPMs. Lastly, its time to play mixologist. Suppose that your chainsaws fuel mixture is correct, and youre still experiencing a lag in performance. Adjust the idle speed. This may be one of the least anticipated causes of the problem, but it occurs in several cases. JavaScript is disabled. The spark plugs spark quality degrades over time, making it impossible to ignite the air-fuel mixture in the combustion chamber. Its an essential step in properly maintaining your chainsaw to check and adjust the chain tension. If the spark plug looks good, check the fuel mix. Turning it clockwise will increase fuel flow, and turning it counterclockwise will reduce fuel flow. Stihl carburetors have three adjustment screws. Another possible cause of a Stihl chainsaw bogging down is a broken or worn chain. The muffler looks easy enough to remove but I want to check out the carb. Why does my Stihl chainsaw bog down when I give it gas? Ben has a bachelors degree in construction engineering. Select gasoline with a minimum octane rating of 89 and a maximum ethanol content of 10%. Dirty filters are the main problem. This is usually behind the air filter, but if you have trouble locating it, consult your user manual. If the chainsaw continues to stall, the issue could be with the low-speed and idle screws, which should be adjusted. Click to see full answer. ry=1 The dream of everyone in the lumbering field is to have a powerful and efficient chainsaw devoid of mechanical faults. 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 is bogging down, one of these critical components isnt in its correct balance. The carburetor has three adjustment screws marked on it. When a screw (e.g., anL screw) is tightened, the fuel flow to the carburetor is restricted, causing the mixture to be lean. keep cutting with precision and efficiency. You will need to position your file depth gauge so that the arrows are pointing toward the nose of the chainsaw bar. 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. Even if you are a novice chainsaw operator, these spark plugsshould be updated at least once a year. Inspect the spark plug and replace it if necessary. The carburetor might need: A clean-up if it's clogged. It's looking a little tricky to me. Align the screws on the carburetor. Use a starting fluid and letting it run flushes gunk out of the jets as an alternative to rebuilding the carburetor. Finally, replace the air filter on the chainsaw. The first step is to make sure that your chainsaw has enough fuel. The spark arrestor is a small screen that prevents the engine from emitting sparks. Any factor that might affect supply can cause the chainsaw to bog down. if (ry==0) I doubt it has more than four or five hours on it. Its starts fine, but if you give it gas it will shut off. 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. If the gas is supplied to the chainsaw then the filters can clog easily. Just took off the muffler and it all looks good. Clean both of these components if they are dirty. It's a small screen you can simply pull out after removing the muffler cover. If the problems remain, examine the fuel lines and carburetor. After reassembling the carburetor make sure the gaskets and seals are airtight. All small holes free of residue. Dirt in the air filters This is one of the biggest culprits when dealing with chainsaw bogging down. Login with username, password and session length, Model 6020-20hp Manual Thomas bandsaw,TC40A 4wd 40 hp New Holland tractor, 450 Norse Winch, Heatmor 400 OWB,YCC 1978-79. 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. First, youll need to pull out your reading glasses and take a look at your chainsaws owners manual. Stalling is a symptom of a complication in the chain-saw. 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" Youll want to start by increasing the idle speed until the engine runs smoothly. If the fuel mix is old or has not been adjusted properly to the manufacturers specifications, refresh it or adjust it. Classifieds - Engine/Transmission/Transfer Case, BJ42 | FJ43 | BJ44 | FJ45 | FJ45LV | HJ47, North American Clubhouses - Central Region, CA.AB- Rocky Mountain Land Cruiser Association, CO/WY- Horsetooth 4 Wheelers Cruiser Club, TX- Lone Star Land Cruisers - Austin Chapter, TX- The White Trash of the Elwood Chapter, CA.BC- Okanagan-Similkameen Land Cruisers, NV- Battle Born Cruisers of Northern Nevada, Vendors: Accessories - Electronics - Recovery, sthil pics pictures by naturalite - Photobucket, http://s820.photobucket.com/albums/zz130/naturalite/sthil pics/. Sounds like a blocked passage somewhere to me. 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. 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. In most models, it can easily be located by taking off the top cover. With the carb apart, make sure all the passages are clear. On most models it is either just below or just above the carburetor and secured with a metal clip. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust . This can usually be done by turning the adjustment screw clockwise. Go ahead and buy a new fuel filter. How did you get the carb off? random_imglink2() So, lesser air is supplied to the carburetor and the saw bogs down. Read more about this in, "This is the Type of Gas to Use in a String Trimmer". You may have to look beneath the air filter or in the Users Manual for your saws model number. Clean it with a wire brush. If your Stihl saw keeps stopping, there could be several potential causes. If the spark plug is fouled, it means that it is unable to ignite the fuel being provided to the cylinder. 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. Where are these located and on what carbs? I would suggest that in the first instance the carburetor settings are checked. It requires an 8mm or 5/16" nut driver or wrench. Gum clogs fuel lines and carburetor.The end result is less supply of fuel for complete combustion to run the saw. //-->,