Do not store a dirty chainsaw. If the chain is loose or dull it may result in the saw not having enough power to keep running. Bog down can also occur in the case of a dirty air filter, spark arrestor, or carburetor. Run a check on your chainsaws cooling system. As mentioned before, most chainsaws will run on one of three gas and two-cycle engine oil mixtures. It requires an 8mm or 5/16" nut driver or wrench. Random Image Link Script- By JavaScript Kit(http://www.javascriptkit.com) Stihl carburetors have three adjustment screws. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust. document.write('') Air Filter Issues. imagelinks[5]="https://woodmizer.com/Store/Shop/Sawmill-Options/CookieMizer-Clamping-Jig?utm_source=forestryforum.com&utm_medium=banner&utm_campaign=cookiemizer&utm_term=2021-03-09&utm_content=800x160" Anyone have any suggestions? } To keep your chainsaw running smoothly, you should service it regularly and keep up scheduled maintenance visits with a reputable, authorized chainsaw service center. 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. If your chainsaw doesnt start, adjust the carburetor screws till it doesnt bog down. Clean both of these components if they are dirty. Finally, the ignition system might need to be adjusted or repaired, and for this, you should contact a professional for assistance. If t present cleaning your tank isnt an option. 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. var imagelinks=new Array() If your chainsaw is bogging down when you press the throttle, it can be a sure sign of an incorrect gas-to-oil ratio. #1. Next, you should check the air filter to make sure it is clean and not blocked by dirt or debris. L and H on your chainsaw. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust. Take them out and clean them using a delicate brush. If you don't know about the perfect amount . All help is appreciated. Remove the filter from the tanks bottom and clean the stale gasoline deposits from the filters jets with a metal wire. JavaScript is disabled. Why does my Chainsaw Bog down when I Pull the Trigger? --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? I'm having trouble with my Stihl MS180 C-BE chainsaw. ALL RIGHTS RESERVED! 6. 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. Cleaning your chainsaws air filter can lead to an improvement in performance and really should be done as part of your routine chainsaw maintenance schedule. 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. The new fuel doesn't really clog the carbs. If the spark plug is cracked or damaged, you will need to replace it. Continue with Recommended Cookies. Finally, check the choke. The saw also won't operate well at speed if the air filter or spark arrestor or carburetor are dirty. Detailed Answer. What it needs is proper maintenance on a daily, weekly, and monthly basis. 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. As a landscape builder, he helped establish two gardening companies. Nearly every weekend you will find us doing small or big jobs or just enjoying our garden. Rotate the fuel supply lever and keep it in the on position while you spray the carburetor cleaner. I love to write about chainsaw for homeowners and professionals. Sounds like a blocked passage somewhere to me. If your chainsaw doesn't start, adjust the carburetor screws till it doesn't bog down. Just took off the muffler and it all looks good. To do this: Loosen each bolt about half way down using flathead screwdriver or small wrench (depending on size). I have cleaned the air filter, replaced the fuel filter to no effect. 0 Members and 1 Guest are viewing this topic. Now that you know how incorrectly mixed fuel can impact your chainsaw, its time to learn the correct way to combine the right fuel you need to get your motor up and running! 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. Clogging usually occurs due to long working hours. Once complete, start the engine and check to make sure the chainsaw is now running correctly. I tried putting new gas in it and starting it up but it didn't make a difference. The rakers are angled low to high with the high end in front of the cutter. It can turn a typical day at work or an enjoyable project into a hassle for its user. A restricted fuel flow will reduce the power of your Stihl chainsaw. (3 Common Causes). The dirt in the air filters can often cause the chainsaw to stall. 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. In some circumstances, vapor locks created in the fuel tank due to insufficient venting cause engine issues. Start by identifying the carburetor on your saw. Check the spark plug as well to examine the ignition system. How do you know what the best gas-to-oil mixture is the best for your chainsaw? It's looking a little tricky to me. Always clean the outside of your chainsaw after using it to remove any dust or debris that may be present. This is usually behind the air filter, but if you have trouble locating it, consult your user manual. I take off everything can come off. Take great care in removing the smaller parts and remove any debris or build up in the carburetor. The Author The dream of everyone in the lumbering field is to have a powerful and efficient chainsaw devoid of mechanical faults. There are a number of carburetor-related problems. function random_imglink(){ */ The reason could be that you are using the Stihl saw at an altitude, or the carburetor adjustment might have slipped and required fixing. 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. 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. Curtis B. A clogged air filter or spark plug can cause your chainsaw to start and then stop. myimages[1]="../../../images/top-banner/ez50-banner.jpg" Solution: Here's the solution. If your chainsaw wont stay running, there are several steps you can take to try and fix it before seeking professional help. For that you require a carburetor cleaner. Ok I got it posted. 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. Bogging down is a universally hated issue by everyone and anyone who uses a chainsaw. I'm an arborist by profession & a blogger by passion. Question: What's the reason for the chainsaw to die under heavy load? if (ry==0) Associate Degree. No matter how tight the seal on the tank is, replace the gas every three months and use stabilizer. In that case, its best to check your air filter and clean it if needed before moving on to more complex issues. If the spark arrestor is clogged, the chainsaw may run stall or run rough. Correct mixing of fuel ingredients. To identify air leakage, you will need to perform a pressure test on your chainsaw. Next, spray a carburetor cleaner into the throat of the carburetor on the side opposite the air filter and throttle linkage. So, lesser air is supplied to the carburetor and the saw bogs down. It could even bog down when given gas. Turn your chainsaws bar to ensure even wear and tear. You should also check the spark plug and air filter to make sure that they are not clogged or damaged. California. If any part of that ratio is off (as previously mentioned), your chainsaw will experience a lag in performance. Thanks for the replies; I'll try out these suggestions. Adjust the high-speed screw to remedy this issue. Cant get a good picture becouse of the glare of the piston. After the overhaul of the piston assembly I used this saw to cut up three rather large downed trees, and some other work. 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. imagelinks[1]="http://www.ezboardwalk.com/" The engine boggs down under a load and when just reving the saw. To unclog the spark arrestor, remove it and clean it with a wire brush. Make sure to take out the spark plug before removing the filter. Affiliate. Since the engine turns off shortly after starting your weed eater, the idle speed may just be too slow. Knowing how to mix fuel properly is the first step to ensuring that your chainsaw will stay up and running for years to come. 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. Vapor lock occurs when the fuel vapor pressure builds up considerably in the fuel tank and isnt allowed to escape from the tank vents. If the saw drops at full throttle, not enough gas or air is reaching that chamber. Jul 22, 2008. Where are these located and on what carbs? They all come with their fair share of technical issues. In case you have lost it, the majority of chainsaws follow the following gas: oil ratio. First, remove the old fuel line from the fuel tank. Garden Tool Expert You should attend to all of those anyway, before you give it a clean bill of health. If your chainsaw is bogging down when you press the throttle, it can be a sure sign of an incorrect gas-to-oil ratio. If the air filter is clean, then the spark plug should be cleaned and gap adjusted to the manufacturers specifications. The gasoline filter can be found at the bottom of your fuel tank. How to Hang a Chainsaw to keep it Safe and Protected in 2023? Then it loses power when cutting. Imagine you are about to cut down or in the middle of cutting down a tree or wood, and your chainsaw bog down. Be sure to check your models owners manual for the exact location of the fuel filter as it can vary from model to model. Ben has a bachelors degree in construction engineering. In order to properly access the carburetor and get at its internal components, youll then need to disassemble the carburetor. 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. Updated: 00/04/25 Loosening the screw, on the other hand, enriches the mixture with gasoline and lowers the RPMs to a set limit. My name is Ben, and growing up, I practically lived in my parents' backyard. 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. 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. Jun 16, 2006. After checking that, soak the crank seals in motor oil (30w works great) and then give it a go. /* You will need to position your file depth gauge so that the arrows are pointing toward the nose of the chainsaw 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. ), 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. I told them that I ran Polaris gold synthetic in it, which I used to use in my drag bike years ago, service manager says stihl says that that is an unacceptable oil. Chain-saw requires constant maintenance to be efficient. 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. 30:1 is recommended mostly for older models. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. 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. Take the appropriate screwdriver and align them. imagelinks2[2]="https://www.youtube.com/c/TheForestryForum?sub_confirmation=1" Finally, replace the air filter on the chainsaw. The carburetor must be maintained, but first, check that your engines filters are thoroughly cleaned. or a blockage in the mesh strainer in the pump chamber. 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. The idling (I) screw regulates the mass flow rate of the air-fuel combination entering the engine at idle. Allow the cleaner to sit for five to 10 minutes and then wipe away with a cloth. //specify corresponding links below Save my name, email, and website in this browser for the next time I comment. This feature is commonly found on modern chainsaws, and is designed to make adjusting the chain tension quick and easy. 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. The spark arrestor is a small screen that prevents the engine from emitting sparks. (Read 66824 times) (Read 66824 times) 0 Members and 2 Guests are viewing this topic. It runs fine at all other times, cuts well and has good power. //specify corresponding links below 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. First, youll need to pull out your reading glasses and take a look at your chainsaws owners manual. In case you have filled it wrong, drain it out and replace it with the correct mix. From falling trees to slicing timber, the chainsaw is a necessity - especially if you are in the lumber industry. There are several factors may make your saw not work properly. The inability to reach full power during a full-throttle trigger is also a sign of bogging down. Will start, sound fine, and work for a couple of minutes, until it gets warm. Fix your Lawnmower with our Lawnmower Troubleshooting tool. How Do You Repair a Chainsaw That Wont Start? var myimages2=new Array() If your chainsaw bogs down at full throttle, the air filter and . Drain the fuel tank and store the gasoline in an appropriate container before bringing it out. New Husqvarna 550XP had to be reprogrammed. myimages2[2]="../../../images/top-banner/behindtheforum.jpg" When the chainsaw is unable to hit full power during the full throttle, it's a good sign that your chainsaw is bogging down. I'm having trouble with my Stihl MS180 C-BE chainsaw. Its worth noting that loosening a screw improves the fuel flow rate and enriches the mixture while tightening the screw has the reverse effect. Try to make the right call based on the cost and gravity of the issue. When not constructing or remodeling X-Ray Rooms, Cardiovascular Labs, and Pharmacies, you can find him at home with wife and two daughters. 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. ). . Secure your chainsaw to maintain stability while working. Over time, the spark arrestor can become clogged with soot. Don't know how to post a pic of it on here. You may have to contend with disassembling your carburetor to correct the mechanical issues bringing about the stalling.Before you to this drastic step first exhaust all possible causes of the problem. This jet is usually responsible for controlling the fuel/air mixture. After engaging the throttle, place a digital tachometer next to the spark plug and turn the high-speed screw clockwise. Top 11 Best Chainsaw Sharpener Tested for Sharpening 2023, How do Chainsaw Chaps Work? Now that I'm all grown up with a wife and kids of my own, I hope to share all the knowledge I've gained over the years. You will need a round file that matches the diameter of your cutters, a flat file, a file guide, and a depth-gauge guide. Stihl MS 180C running problems, bogging down, fuel starvation?? Prevent oil from accumulating in the engine. 1. We are compensated for referring traffic and business to Amazon and other companies linked to on this site. A clean and fixed carburetor is key to achieving full throttle performance. Following the L modification, the mixture composition should be adequate to keep your engine running. Using 10x magnifying classes I discovered a tiny piece of fiber partially clogging the high speed jet in the carb. The ignition system is essentially a spark plug. ( 2 cents) the new gas seems to clog small motors Mike. Re-attach the carburetor cover and test the saw. http://www.ebay.com/itm/STIHL-017-MS170-018-MS180-Replacement-CARBURETOR-CARB-/130584786959?pt=US_Chainsaws&hash=item1e6775b80f, Quote from: rstarkie on June 06, 2013, 09:50:21 PM, Quote from: Submariner on December 14, 2018, 01:42:06 PM, Running problems Husqvarna 246 and Shindaiwa 457S probably bad fuel issues, Figured Out My Efco 251 Fuel Starvation Problem (shuting off after 4 or 5 min. piston and cylinder is clean. Inspect the fuel line condition. Take a measuring beaker and add oil and gasoline of the required amount according to the model of your chainsaw.
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