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There are several factors may make your saw not work properly. 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. Stihl chainsaw engine ( motor ) bogging down things to check first. If a chainsaw is bogging down when it is throttled, this indicates that the gasoline to oil ratio supplied to the saw has been incorrect. I have a MS250 that's only two years old and has barely been used. The ignition system includes the spark plugs, ignition coil, and exhaust muffler. Over time, the spark arrestor can become clogged with soot. No matter how tight the seal on the tank is, replace the gas every three months and use stabilizer. Theres a myriad of issues that can lead to a bogged-down chainsaw, and most of them have something to do with your chainsaws combustion engines ability to access fuel or air amply. In case you have lost it, the majority of chainsaws follow the following gas: oil ratio. Stihl carburetors have three adjustment screws. . If your chainsaws carburetor is not clogged, the tuning of your carburetor may be to blame. By properly troubleshooting and addressing any potential causes, you can prevent stalling or restarting problems with your Stihl saw. Jul 22, 2008. Furthermore, the arrestor screen that catches the spark at the exhaust port is prone to carbon deposits. Question: What's the reason for the chainsaw to die under heavy load? 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. Clean out the air filter and carburetor. Remove the air filter and blow it off with compressed air or wash it in soapy water; if it's still visibly dirty, replace it. From falling trees to slicing timber, the chainsaw is a necessity - especially if you are in the lumber industry. For the spark plug, use a delicate brush, a wire, or a plug spray-on to clean off the thick carbon. Clean or replace filters located in the fuel tank of your chain saw. 01 - Stihl Chainsaw Spark Arrestor. Loosening the screw, on the other hand, enriches the mixture with gasoline and lowers the RPMs to a set limit. After checking that, soak the crank seals in motor oil (30w works great) and then give it a go. If your chainsaw is bogging down, one of these critical components isnt in its correct balance. First, youll need to pull out your reading glasses and take a look at your chainsaws owners manual. So I am just wondering how to go about pulling the carb off the easiest way to check out the jets. 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. Why does my chainsaw stall when gas is given? before starting the process. Other indicators that your chainsaw may be suffering from carburetor troubles are overheating or excessively smoky exhaust. For example, if the carburetor is clogged, not tuned correctly, or is contaminated, it may not be metering the right amount of fuel. Be sure to check your models owners manual for the exact location of the fuel filter as it can vary from model to model. So, lesser air is supplied to the carburetor and the saw bogs down. #7. 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. On the first day the crew used it, it was bogging down. 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. No particular problem restarting. When the chainsaw is unable to hit full power during the full throttle, it's a good sign that your chainsaw is bogging down. 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 needed, purchase the tools from a hardware store and make sure you have personal protective equipment (goggles, gloves, etc. ) To ensure any residue is removed, spray the inside of the carburetor with carburetor cleaner and scrub with a stiff brush. You can work on it directly using a carburetor adjustment tool. ry=1 More so, the chainsaw might bog and refuse to run when you give it gas. 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. Carburetors alone can be both the cause and the solution to a chainsaw bog down. This article thus covers all causes and solutions to why does my chainsaw bogs down when I give it gas problem below: In a chainsaw both fuel starvation or termination of the connection between carburetor and engine can lead to a bog down. (Why You Might Not Want to), Why Wont My Chainsaw Cut? Now, remove the filter and clean the dust buildup using a brush. It has a new spark plug, clean air filter, n Welcome, Guest. There are three adjustment screws on the carburetor: low-speed (L), high-speed (H), and idling (I). Make sure it is moveable and not stuck in the open or closed position. Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. First and foremost, you should check that you are using the correct fuel and oil mixture for your chainsaw. You will also reduce kickbacks and increase the overall safety of operating your chainsaw. Begin by draining the fuel tank and draining the existing fuel from the carburetor. This is usually behind the air filter, but if you have trouble locating it, consult your user manual. Dirty Spark Plug Causes a String Trimmer to Run Rough. 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. Random Image Link Script- By JavaScript Kit(http://www.javascriptkit.com) If it needs to be cleaned, take care to not damage it by using compressed air or a soft brush. Also, check the lubrication hole for debris and clean your bar groove. Firstly, what instigates the chainsaw Bog down? It requires an 8mm or 5/16" nut driver or wrench. 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. Next, you should check the air filter to make sure it is clean and not blocked by dirt or debris. If any part of that ratio is off (as previously mentioned), your chainsaw will experience a lag in performance. Random Image Link Script- By JavaScript Kit(http://www.javascriptkit.com) 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. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,600],'remodelormove_com-mobile-leaderboard-1','ezslot_24',167,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-mobile-leaderboard-1-0');The T adjustment on a chainsaw is a tool-free tensioning system that makes it easier for users to adjust the tension of the chain. Clean the outside area of the carburetor. 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) . To keep your chainsaw running smoothly, you should service it regularly and keep up scheduled maintenance visits with a reputable, authorized chainsaw service center. A carburetor is a part of a combustion motor that mixes air and fuel in a specific ratio for combustion. Solution: Here's the solution. I didn't run straight gas through it and it isn't sized up so I am wanting to dig into the carb myself. Check inside the fuel tank for dirt and debris. The standard compression reading required for most 2-cycle chainsaw is around 100-110 psi to start. var imagelinks2=new Array() Chainsaw starts but dies when I give it gas. The engine and its associated delivery system need to be airtight to maintain adequate temperature and pressure. Stalling is a symptom of a complication in the chain-saw. I'm having trouble with my Stihl MS180 C-BE chainsaw. Stihl Chainsaw Bogs Down When I Give It 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. The Forestry Forum is sponsored in part by: 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 not constructing or remodeling X-Ray Rooms, Cardiovascular Labs, and Pharmacies, you can find him at home with wife and two daughters. Step Three. Clogging usually occurs due to long working hours. Clean it with a wire brush. Let the chainsaw cool down if there's excessive smoke release or the chainsaw got heated up. JavaScript is disabled. Chainsaw bogs on full throttle #63708 18/04/15 11:39 PM. Correct some carbs can be damaged by compressed air. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. 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. 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. Align the screws on the carburetor. The inability to reach full power during a full-throttle trigger is also a sign of bogging down. Find the source of the issue and you can easily fix it. Imagine you are about to cut down or in the middle of cutting down a tree or wood, and your chainsaw bog down. I guage the rakers and grind them when necessary. Using 10x magnifying classes I discovered a tiny piece of fiber partially clogging the high speed jet in the carb. Click to see full answer. 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. He tests chainsaws based on As mentioned before, most chainsaws will run on one of three gas and two-cycle engine oil mixtures. The above answer may be brief, but I will explain it in more detail, including how to fix a chainsaw that wont start. I will try to figure out how to get the carb off tomorrow morning. The new fuel cleans everything really good and what the fuel cleans ends up in the fuel filter or the carburetor screen. If the spark arrestor screen has become damaged, you should replace it. Ok I got it posted. If your chainsaw is bogging down when you press the throttle, it can be a sure sign of an incorrect gas-to-oil ratio. 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. If the chain is loose or dull it may result in the saw not having enough power to keep running. 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. In some circumstances, vapor locks created in the fuel tank due to insufficient venting cause engine issues. It's all clean no cracks no discoloration nothing. my elevation is 640' above sea level. Hello, and thanks for visiting my site! If the problems remain, examine the fuel lines and carburetor. The idling (I) screw regulates the mass flow rate of the air-fuel combination entering the engine at idle. So anyhow, I've ran about 25 hours and took it for a tune up. You may have to look beneath the air filter or in the Users Manual for your saws model number. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); Your email address will not be published. If these steps do not solve the problem, you should take the chainsaw to a professional for servicing or further diagnosis. Adjusting the idle screw, for instance, is a corrective measure for a chainsaw stalling when idle. on Chainsaws, Started by rapserv Why does the ECHO chainsaw bog down when cutting? 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. You must locate the perfect setting at which the engine won't stop once the throttle is applied. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Lastly, its time to play mixologist. I would suggest that in the first instance the carburetor settings are checked. You should use mid-grade unleaded gasoline with a minimum octane rating of 89 and a premium two-cycle oil. But soon loses power and bogs down. 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. How to Prevent Your Chainsaw from Bogging Down To rule out any of these as a potential cause, its important to first check the air filter. Finally, replace the air filter on the chainsaw. Confirm for water and debris in your fuel tank. Any factor that might affect supply can cause the chainsaw to bog down. //-->,