This jet is usually responsible for controlling the fuel/air mixture. He pledges to come up with new knowledge about chainsaws every once in a while. It has a new spark plug, clean air filter, n Chainsaw bogs down in cut in Chainsaws Have a Stihl 441 that starts and idles fine and even start cutting. Step Three. The muffler looks easy enough to remove but I want to check out the carb. 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. The location of the fuel filter on a Poulan chainsaw varies depending on the model. You should use mid-grade unleaded gasoline with a minimum octane rating of 89 and a premium two-cycle oil. Turning it clockwise will increase fuel flow, and turning it counterclockwise will reduce fuel flow. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[320,50],'remodelormove_com-box-3','ezslot_6',175,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-box-3-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[320,50],'remodelormove_com-box-3','ezslot_7',175,'0','1'])};__ez_fad_position('div-gpt-ad-remodelormove_com-box-3-0_1');.box-3-multi-175{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:7px!important;margin-left:auto!important;margin-right:auto!important;margin-top:7px!important;max-width:100%!important;min-height:50px;padding:0;text-align:center!important}Lastly, if the air filter is dirty or clogged it will restrict the air flow and cause the saw to lose power. It bogs down it seems and stalls out when I open the throttle. Clear all dirt and debris from the saw body, chain, and bar. 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. Remove the muffler. 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. First, remove the old fuel line from the fuel tank. Begin by draining the fuel tank and draining the existing fuel from the carburetor. 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. It's all clean no cracks no discoloration nothing. (3 Common Causes). Inspect the clutch center, drum, and spring for any excessive wear. var imagelinks=new Array() Drain the fuel tank and store the gasoline in an appropriate container before bringing it out. Use big lines will for fuel filter lines connected to the inside of the tank.Also, use smaller of two lines for return to the fuel tank from the carburetor from the primer bulb. Replacement of carburetor is the best option if you have an old chainsaw.This is because the diaphragm gets hard making it hard to crank. Poor chainsaw maintenance is one of the lead causes of bogging. They wrote it up as I ran straight gas through it and seized it. 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. ry=1 To unclog the spark arrestor, remove it and clean it with a wire brush. Correct some carbs can be damaged by compressed air. Start by sharpening the cutting teeth of the blade first. The Basics Explained, Can a Concrete Chainsaw Cut Through Rebar? Other potential causes of bogging may include a spark plug that needs replacing, fuel that has gone bad, incorrect fuel-oil mixture, chain that is too tight, or even an over-revved engine. First, disconnect the spark plug wire and turn the engine off. myimages[6]="../../../images/top-banner/EZ-junior.jpg" This can usually be done by turning the adjustment screw clockwise. ( 2 cents) the new gas seems to clog small motors Mike. 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. It is experienced during welding, idling, or full throttle. Clean air intake slots on the housing of the starter and inspect your starter cord for any damage. To remove it you need to depress a small tab and slide the fuel line off. There are several factors may make your saw not work properly. More so, the chainsaw might bog and refuse to run when you give it gas. I think the problem is ethanol in gas, espesially gas . Inspect the spark plug and replace it if necessary. 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. The dream of everyone in the lumbering field is to have a powerful and efficient chainsaw devoid of mechanical faults. Over time, the spark arrestor can become clogged with soot. To identify air leakage, you will need to perform a pressure test on your chainsaw. skytower, Oct 3, 2010. In most cases, clogged air and fuel filters and blocked carburetor jets are causing the problem. Any factor that might affect supply can cause the chainsaw to bog down. It could even bog down when given gas. Tips from a Professional, Chainsaw Starts but Wont Idle. 3. on Chainsaws, Started by H60 Hawk Pilot All help is appreciated. And these issues can be solved if the problem is identified. By properly troubleshooting and addressing any potential causes, you can prevent stalling or restarting problems with your Stihl saw. 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/. The Author The dream of everyone in the lumbering field is to have a powerful and efficient chainsaw devoid of mechanical faults. imagelinks2[1]="https://www.youtube.com/c/TheForestryForum?sub_confirmation=1" Weather is 30-50 when I'm cutting and I'm trying to run 40:1, 93 only. Why does my Stihl chainsaw bog down when I give it gas? If the drive belt is worn or broken, replace it with a new one as soon as possible. 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. The engine boggs down under a load and when just reving the saw. The air supply is equally as important as fuel for a combustion engine. The standard compression reading required for most 2-cycle chainsaw is around 100-110 psi to start. After the overhaul of the piston assembly I used this saw to cut up three rather large downed trees, and some other work. The reason for that may be you're using the saw at altitude or the carburetor adjustment has simply slipped. Answered by Patrick, Top 10 Best Chainsaw Bars Tested and Compared for 2023, How does a Chainsaw Carburetor Work? 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. Where are these located and on what carbs? I. 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. You will need a round file that matches the diameter of your cutters, a flat file, a file guide, and a depth-gauge guide. Disengage the chain brake and manually advance through the chain until you reach your starting point mark. Tuning of the screws to adjust and align them. When I remove the cover (13), I find the upper surface of the filter (2) heavily contaminated (this is an aftermarket eBay filter, perhaps it is not sealing properly? ). Suppose that your chainsaws fuel mixture is correct, and youre still experiencing a lag in performance. After cleaning the air filter and spark arrestor, you should fill the tank, start the saw and let it warm up for a few minutes before adjusting the carburetor. Align the screws on the carburetor. Now take and post a picture so we can see the exhaust side of the piston. The rakers are angled low to high with the high end in front of the cutter. These screws are in charge of regulating the fuel flow to the carburetor under varied load circumstances. If your Stihl saw keeps stopping, there could be several potential causes. Check the fuel tank for the correct fuel and oil mixture, filling it up if necessary. Adjust the air screw until the idle speed is consistent. It can turn a typical day at work or an enjoyable project into a hassle for its user. Solution: Here's the solution. So I am just wondering how to go about pulling the carb off the easiest way to check out the jets. Loosening the screw, on the other hand, enriches the mixture with gasoline and lowers the RPMs to a set limit. The engine should start by now. 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. Jun 16, 2006. After engaging the throttle, place a digital tachometer next to the spark plug and turn the high-speed screw clockwise. The ignition system is essentially a spark plug. Make sure to properly lubricate your chain with chain oil and check the compression in the cylinder. How do you know what the best gas-to-oil mixture is the best for your chainsaw? 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(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. The ignition system includes the spark plugs, ignition coil, and exhaust muffler. Also, use a clean cloth and some carburetor cleaner to wipe down the inside of the carburetor. 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. If user's chainsaw is bogging down than this is often a sign of improper gas-to-oil ratio. As a result, the chainsaw will bog down at full throttle. If your chainsaw is bogging down when you press the throttle, it can be a sure sign of an incorrect gas-to-oil ratio. 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. If the spark plug is physically damaged, replace it. document.write('') Bog down is mostly experienced on full throttle. Correcting stalling measures are generally referred to as tune-ups.These procedures help in improving your chainsaw performance. If the fuel you are using is too old or is diluted, your chainsaw will not work correctly. Adjust the main jet by twisting the needle in either direction. Heres a quick rundown of daily, weekly, and monthly maintenance tips: Chains will loosen over time and use. Bog down is straight-up the most infuriating issue when using a chainsaw. 30:1 is recommended mostly for older models. Check the fuel hose, famous for cracking. Detailed Answer. The spark arrestor is a small screen that prevents the engine from emitting sparks. 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. The fuel lines or ignition system may have beenaffected if the problems continue despite adjustment. A daily, weekly, and monthly check-up and cleaning must be performed for optimal performance. Page created in 1.341 seconds with 39 queries. Chain-saw requires constant maintenance to be efficient. } Clean your spark plug and measure the gap. The carburetor must be maintained, but first, check that your engines filters are thoroughly cleaned. 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. Most manufacturers do not recommend adjusting the tuning of your chainsaws carburetor outside the hands of a trained professional. 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. Random Image Link Script- By JavaScript Kit(http://www.javascriptkit.com) Consult the user manual for the right ratio of gas to oil. By, Read More Chainsaw Too Much Compression: Causes & SolutionContinue, Your email address will not be published. Adjust the high-speed screw to remedy this issue. I didn't run straight gas through it and it isn't sized up so I am wanting to dig into the carb myself. Any factor that might affect supply can cause the chainsaw to bog down. They all come with their fair share of technical issues. It did sit with gas in it for a while, but there are no visible signs of any damage to the carb as a result. Sounds like a blocked passage somewhere to me. Thoroughly inspect your throttle trigger. Turning the knob will either tighten or loosen the chain, depending on the direction the user turns the knob. That should help improve the performance of the chainsaw and resolve the issue of your saw stalling when you give it gas. 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. If your chainsaws carburetor becomes clogged with dirt and debris, airflow is restricted and the chainsaws engine suffers. It is difficult to get the proper high-speed adjustment by ear -- most pros use a tachometer. LancelotLawns said: I bought a stihl bg85 blower/vacuum two days ago. 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. Clean both of these components if they are dirty. Prevent oil from accumulating in the engine. I love to write about chainsaw for homeowners and professionals. Carb. 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 think I am having the same problem with mine. #7. To adjust the tension on the chain, the user simply turns a knob located near the drive sprocket. Bog down can also occur in the case of a dirty air filter, spark arrestor, or carburetor. There are three adjustment screws on the carburetor: low-speed (L), high-speed (H), and idling (I). Its all clean just a blackish color. For a better experience, please enable JavaScript in your browser before proceeding. Add your pre-measured oil to the container, Add your pre-measured gasoline AFTER (not before) your oil, Seal your fuel container and swirl, not shake, to thoroughly combine the oil and gasoline, Once properly mixed, your gas and oil mixture will be evenly colored with no variegated streaks, Check your owners manual to locate your chainsaws air filter, Your chainsaws air filter should be visible at this point and can be easily removed from its housing with a screwdriver, After removing the air filter, wash it in soapy water and scrub with a soft-bristle brush until clean, Allow your air filter to dry thoroughly before replacing it in your chainsaw, Make sure that your chainsaw is off and cool (Heat isnt your friend here! Updated: 00/04/25 var imagelinks2=new Array() Solution: Use the user manual to locate the air filter. If the air filter is clean, then the spark plug should be cleaned and gap adjusted to the manufacturers specifications. Remove the carburetor and check it for damage, cleaning it if necessary. Together we put a lot of effort into the maintenance of our gardens over the last few years, we become obsessed with it. Be sure that your oiler is adequately lubricating your bar and chain. How to Prevent Your Chainsaw from Bogging Down Make sure it is moveable and not stuck in the open or closed position. After checking that, soak the crank seals in motor oil (30w works great) and then give it a go. random_imglink() 20,427 satisfied customers. For that you require a carburetor cleaner. If the chainsaw continues to stall, the issue could be with the low-speed and idle screws, which should be adjusted. When a chainsaw bogs down when accelerating, it typically means the engine is not receiving enough fuel or air. If the spark arrestor is clogged, the chainsaw may run stall or run rough. Vapor lock occurs when the fuel vapor pressure builds up considerably in the fuel tank and isnt allowed to escape from the tank vents. myimages2[1]="../../../images/top-banner/behindtheforum.jpg" To rule out any of these as a potential cause, its important to first check the air filter. To do this: Loosen each bolt about half way down using flathead screwdriver or small wrench (depending on size). On the first day the crew used it, it was bogging down. Clogging usually occurs due to long working hours. Re: Chainsaw bogs on full throttle . 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. Fill the tank with the prescribed gas-to-oil ratio. If it needs to be cleaned, take care to not damage it by using compressed air or a soft brush. Click to see full answer. Lastly, you should clean the air filter and replace it if necessary. 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. Most engine problems can be solved with the previously mentioned adjusting procedure. 4. Why does my Chainsaw Bog down when I Pull the Trigger? document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); Your email address will not be published. You should attend to all of those anyway, before you give it a clean bill of health. Clogging slows down the engine from in-taking fuel and air, which results in a bog down at full throttle. 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. No particular problem restarting. 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 dirt in the air filters can often cause the chainsaw to stall. This feature is commonly found on modern chainsaws, and is designed to make adjusting the chain tension quick and easy. (3 Common Causes). In that case, its best to check your air filter and clean it if needed before moving on to more complex issues. Associate Degree. 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. The use of stale ethanol-blended fuel, which creates sticky white deposits over time, is the most typical source of such clogs. The remedy is to close the screw, but closing it too far is dangerous for the engine. Jul 22, 2008. Over time, the spark arrestor can become clogged with soot. It is responsible for mixing fuel and supplying it to the engine. If the spark plug is cracked or damaged, you will need to replace it. Furthermore, the arrestor screen that catches the spark at the exhaust port is prone to carbon deposits. Lock the chain brake by pushing the handle forward. Question: What's the reason for the chainsaw to die under heavy load? Once complete, start the engine and check to make sure the chainsaw is now running correctly. Older saws have degraded lines which need replacement.
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