Additionally, it is a good idea to check the spark plug to make sure it is in good condition. Fix your Lawnmower with our Lawnmower Troubleshooting tool. Author Topic: Stihl MS 180C running problems, bogging down, fuel starvation?? So, lesser air is supplied to the carburetor and the saw bogs down. There are a number of carburetor-related problems. If the fuel you are using is too old or is diluted, your chainsaw will not work correctly. //specify corresponding links below In some circumstances, vapor locks created in the fuel tank due to insufficient venting cause engine issues. 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. Stihl MS 180C running problems, bogging down, fuel starvation?? 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. I asked my brother to take a look at it since he's fixed a number of chainsaws, and he says it looks like it isn't getting fuel. For that you require a carburetor cleaner. on Chainsaws. 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. myimages2[1]="../../../images/top-banner/behindtheforum.jpg" If you need, Read More Stihl chainsaw break inContinue, Carbon build-up in cylinder & piston, bad needle bearing, overused starter spring, oil in the starter system, old or bad fuel, etc can cause too much compression in Chainsaws. 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. Get a carburetor repair kit before you begin clearing the blocked jets. This can usually be done by turning the adjustment screw clockwise. It should be the first thing to check and clean. Ok I think I can share the pics from this site. 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. Even if you are a novice chainsaw operator, these spark plugsshould be updated at least once a year. piston and cylinder is clean. As a preventative measure, always keep your tank vents clean. If you observe any evidence of damage or wear on the air filter, I recommended to replace it. Page created in 1.341 seconds with 39 queries. If the plug checks out, try removing it and spraying it with aerosol-based cleaner. First, remove the old fuel line from the fuel tank. As a result, the engine runs at too high or too low RPMs. Why does the ECHO chainsaw bog down when cutting? Locate all the screws on the carburetor and check if they are all aligned. Finally, the ignition system might need to be adjusted or repaired, and for this, you should contact a professional for assistance. To check if theres a vapor lock, unscrew the tanks cap and put it back on again. Over time, the spark arrestor can become clogged with soot. If t present cleaning your tank isnt an option. The air supply is just as important as a fuel supply in any internal combustion engine. The Basics Explained, Can a Concrete Chainsaw Cut Through Rebar? Generally, you will find the fuel filter on the fuel line, usually near the carburetor. 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. Being in the cutting services for more than 10 years, I know a thing or two about chainsaw. Chainsaw Vapor Lock. With the carb apart, make sure all the passages are clear. Guess its time to pull the carby down and check the diaphragm and mesh. If you don't keep the blade oiler reservoir filled, you will have dulled blades, damaged bars, and generally poor performance. Random Image Link Script- By JavaScript Kit(http://www.javascriptkit.com) Here is a visual troubleshoot guide by Foxboss9 discussing the bogging issues and their solution: A Husqvarna chainsaw bogs down due to a clogged air filter or spark arrester. In case you have lost it, the majority of chainsaws follow the following gas: oil ratio. And these issues can be solved if the problem is identified. If your chainsaw doesnt start, adjust the carburetor screws till it doesnt bog down. So anyhow, I've ran about 25 hours and took it for a tune up. For a better experience, please enable JavaScript in your browser before proceeding. The saw also won't operate well at speed if the air filter or spark arrestor or carburetor are dirty. Dont forget that a maintained chainsaw is a working chainsaw! It is also its orientation that keeps it working smoothly on little or full throttle. Check the return/recoil spring and starter. Trying that is by using Stihl Ultra bottles and pouring a little less but I always have some left over gas in the can. Ben has a bachelors degree in construction engineering. Adjust the high-speed screw to remedy this issue. 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. Furthermore, the arrestor screen that catches the spark at the exhaust port is prone to carbon deposits. 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. The fuel lines or ignition system may have beenaffected if the problems continue despite adjustment. Chainsaw bogs on full throttle #63708 18/04/15 11:39 PM. The carburetor might need: A clean-up if it's clogged. 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. If your chainsaw starts but does not stay running, the low-speed (L) and idle screw (I) may not be properly set. We pulled out the carb and opened it up, and the check valve looked perfect and everything was as clean and shiny as you'd expect a basically brand new saw to look. I took it to the shop for repair, thinking it was the carb but they told me I ran straight gas through it and seized it up. A carb cleaner spray is an excellent tool for eliminating sticky deposits from your jets and reviving your carburetor. (Why You Might Not Want to), Why Wont My Chainsaw Cut? Also cleaned muffler and replaced spark arrestting screen.All with no luck. The spark plugs spark quality degrades over time, making it impossible to ignite the air-fuel mixture in the combustion chamber. You must locate the perfect setting at which the engine won't stop once the throttle is applied. It could even bog down when given gas. However, when your chainsaw bogs down, it turns your enjoyable day in the backyard into a complete headache. Los Angeles, CA 90013 Step Three. These are the low-speed screw (L), the idle screw (I), and the high-speed screw (H). That should help improve the performance of the chainsaw and resolve the issue of your saw stalling when you give it gas. In order to properly access the carburetor and get at its internal components, youll then need to disassemble the carburetor. Once youve made the adjustments, make sure to monitor the performance of your saw over the next few days and readjust if necessary. The reason could be that you are using the Stihl saw at an altitude, or the carburetor adjustment might have slipped and required fixing. /* . Tips from a Professional, Chainsaw Starts but Wont Idle. This is usually behind the air filter, but if you have trouble locating it, consult your user manual. #7. It's looking a little tricky to me. Frustrating, right? Chain-saw requires constant maintenance to be efficient. 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. myimages[4]="../../../images/top-banner/ez50-banner.jpg" 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" To identify air leakage, you will need to perform a pressure test on your chainsaw. Your chainsaw bogging down is a common issue that youll face when wielding one, and it can quite quickly throw a knot in your woodworking projects. You can have as many as you wish The consent submitted will only be used for data processing originating from this website. How did you get the carb off? It can turn a typical day at work or an enjoyable project into a hassle for its user. Still, if you feel that you can do so yourself, you can watch this YouTube tutorial here. I do sharpen the chains myself using an Oregon 511A. Manage Settings 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. I think I am having the same problem with mine. If the spark arrestor screen has become damaged, you should replace it. I tried putting new gas in it and starting it up but it didn't make a difference. However, now it is acting odd. The first problem is that when the saw is tilted forwards or the chain brake is disengaged it stalls. Carb. A chainsaw is a tool, and no tool is perfect. When dropping a tree, what are you guys watching?. If there is none, then take off the cover and locate the carburetor. If your chain does not rotate, you can skip this step. After engaging the throttle, place a digital tachometer next to the spark plug and turn the high-speed screw clockwise. The location of the fuel filter on a Poulan chainsaw varies depending on the model. The rakers are angled low to high with the high end in front of the cutter. Updated: 00/04/25 Clean and/or replace the spark arrestor screen. So I am just wondering how to go about pulling the carb off the easiest way to check out the jets. Following the L modification, the mixture composition should be adequate to keep your engine running. If your Stihl chainsaw starts up with a reassuring puttering sound, but dies when you pull the throttle trigger, there likely is an issue with the fuel, but the carburetor could need. You should use mid-grade unleaded gasoline with a minimum octane rating of 89 and a premium two-cycle oil. The chainsaw will bog down or stop running. Using 10x magnifying classes I discovered a tiny piece of fiber partially clogging the high speed jet in the carb. Chainsaw bogging down after starting or not starting at all is a common problem for a lot of chainsaw users. If the problems remain, examine the fuel lines and carburetor. Some issues can be solved at home with the right tools, and some need professional help. When the chainsaw is unable to hit full power during the full throttle, it's a good sign that your chainsaw is bogging down. Use low pressure compressed air, and a stiff paint brush bristle to check them all. If your chain starts to spin, loosen the idler screw until it stops. Also, use a clean cloth and some carburetor cleaner to wipe down the inside of the carburetor. Just took off the muffler and it all looks good. If the chainsaw continues to stall, the issue could be with the low-speed and idle screws, which should be adjusted. The dirt in the air filters can often cause the chainsaw to stall. The engine boggs down under a load and when just reving the saw. Lock the chain brake by pushing the handle forward. Its an essential step in properly maintaining your chainsaw to check and adjust the chain tension. 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. How do you know what the best gas-to-oil mixture is the best for your chainsaw? The saw has been well used over the years (1998) and not really well looked after. Where are these located and on what carbs? I would suggest that in the first instance the carburetor settings are checked. A clean and fixed carburetor is key to achieving full throttle performance. 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. Currently I live in Austin, United States. 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. Anyone have any suggestions? On most models it is either just below or just above the carburetor and secured with a metal clip. The issue of chainsaw bog down can be very calamitous, and it oozes a great deal of frustration. This will keep your chain in place for the next steps. I think the problem is ethanol in gas, espesially gas . myimages2[3]="../../../images/top-banner/behindtheforum.jpg" In my experience, there are two possible causes of this 'bogging down of the engine' and to resolve this the manufacturer's manual is required or alternatively a little internet investigation. Jul 22, 2008. It's 14in bar and chain, with a new chain on the saw. Its all about adjusting the carburetor, and a slight change in the orientation can lead to Chainsaws Bog. Then it loses power when cutting. Align the screws on the carburetor. 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. As a result, the fuel drawn by the carburetor reduces, causing the engine to stop running. Youll want to start by increasing the idle speed until the engine runs smoothly. When a chainsaw bogs down when accelerating, it typically means the engine is not receiving enough fuel or air. 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. We like to help other people maintaining their garden and find cool products to write about. Check the edges of the bar for burs and file off if needed. This means emptying the fuel tank and then restarting and letting the unit run until all the fuel is consumed and the engine stops. Rotate the saw and file the remaining teeth using the same angle and motions as before. var imagelinks2=new Array() You should also check the spark plug and air filter to make sure that they are not clogged or damaged. The inability to reach full power during a full-throttle trigger is also a sign of bogging down. To keep your chainsaw running smoothly, you should service it regularly and keep up scheduled maintenance visits with a reputable, authorized chainsaw service center. Check the fuel tank for the correct fuel and oil mixture, filling it up if necessary. I have a MS250 that's only two years old and has barely been used. There are three adjustment screws on the carburetor: low-speed (L), high-speed (H), and idling (I). The Job of the Carburetor 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 idling (I) screw regulates the mass flow rate of the air-fuel combination entering the engine at idle. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); Your email address will not be published. Secondly, its about time we take a look at why your chainsaw suddenly stops working.The carburetor is like the vein in engines.Once it is clogged, the free flow of air and fuel will be blocked and the engine will be starved of fuel.To quell this issue, wash away the diets using the carburetor cleaner.In some scenarios, washing away or cleaning the carburetor may not be effective, hence, you should consider buying a new carburetor or repairing it.A clogged fuel tank can also cause the chainsaw to stop working.In such cases, endeavor to drain the old file from the chainsaw SNF ensure that the fuel tank is devoid of fuel. There are many factors that cause a bog down, but mostly it is the carburetor orientation or blockage. The effect of air leakage is that it upsets the composition of the air-fuel mixture. Clean your chainsaw. Select gasoline with a minimum octane rating of 89 and a maximum ethanol content of 10%. 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) . It is recommended to replace the fuel filter every year to ensure optimal performance and avoid any possible issues. In case you have filled it wrong, drain it out and replace it with the correct mix. 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. Don't know how to post a pic of it on here. Misaligned screws can cause bogging down, smoking in the chainsaw, and lower performance efficiency. Lastly, you should clean the air filter and replace it if necessary. Stihl carburetors have three adjustment screws. Re: Stihl MS 180C running problems, bogging down, fuel starvation?? After reassembling the carburetor make sure the gaskets and seals are airtight. Loosening the screw, on the other hand, enriches the mixture with gasoline and lowers the RPMs to a set limit. Clean the outside area of the carburetor. 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. After checking that, soak the crank seals in motor oil (30w works great) and then give it a go. 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. before starting the process. 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. What it needs is proper maintenance on a daily, weekly, and monthly basis. Nearly every weekend you will find us doing small or big jobs or just enjoying our garden. The most common causes of a chainsaw bogging down include: Incorrect fuel mixture Dirty carburetor Clogged air filter Dirty fuel filter or fuel lines A combustion system depends on a proper mix of gas, oil, and air. 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. myimages[6]="../../../images/top-banner/EZ-junior.jpg" Ok I got it posted. Will start, sound fine, and work for a couple of minutes, until it gets warm. The ignition system includes the spark plugs, ignition coil, and exhaust muffler. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust. No matter how tight the seal on the tank is, replace the gas every three months and use stabilizer. A restricted fuel flow will reduce the power of your Stihl chainsaw. If the compression is low, you should clean and check for any damage or wear. Its all clean just a blackish color. myimages[5]="../../../images/top-banner/cookie-mizer.jpg" Look over all cables, connections, nuts, and screws to ensure that they are not damaged and need replacement. 1 Hour1 Day1 Week1 MonthForever In case it is not the fuel ratio, it might be dirty or clogged air filters. Something may be amiss in the low or high speed circuit of the carb. You are using an out of date browser. The proper fuel mixture is essential for effective, trouble-free operation. Remedy this by adjusting the high-speed screw. 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. I love to write about chainsaw for homeowners and professionals. Although Richard does focus on other home improvement tools, his focus remains on cutting fallen trees or maintaining his backyard via chainsaw tools. Stihl chainsaw engine ( motor ) bogging down things to check first. 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.. Inspect the spark plug and replace it if necessary. We are compensated for referring traffic and business to Amazon and other companies linked to on this site. A carburetor is a part of a combustion motor that mixes air and fuel in a specific ratio for combustion. Or maybe gas varnish in the screen filter at the base of the metering needle. Then, remove the air filter and fuel filter. Over 200+ free JavaScripts here! I ask if they checked the carb and they said no. If your chainsaw is bogging down when you press the throttle, it can be a sure sign of an incorrect gas-to-oil ratio. Let the chainsaw cool down if there's excessive smoke release or the chainsaw got heated up. Clogging slows down the engine from in-taking fuel and air, which results in a bog down at full throttle. Make sure to properly lubricate your chain with chain oil and check the compression in the cylinder. Updated: 00/04/25 A well-maintained chain-saw seldom stalls.
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