Outdoor Gasoline and Electric Powered Equipment and Small Engines - Poulan Pro chainsaw starts, idles extremely fast, but dies when I hit the gas. This is the control for air/fuel mixture when you're running the saw at high-speeds or during cutting. Very convenient. While using it yesterday it reved up and stalled. Hold the trigger wide open and check the RPM with the tachometer. A chainsaw chain should never spin when idle. It will also lack power in the cut and tend to run very hot.The preceding information briefly explains rich and lean running conditions. On the chainsaw, it is denoted by the letter L. When this screw is tightened, it prevents fuel from flowing to the carburetor. Then run the chainsaw again to see if its all good. As a result, the exhaust gases are high in carbon content which can clog the arrestor screens in the muffler. It should be about midway between the rich and lean settings. Click on the link below and a WAV sound clip will be loaded into your browser. An over-revving chainsaw is highly hazardous to your engine, as it can not only score the piston but also overheat its components, resulting in a total seizure. (7) Go back to step (5) and reset the idle speed. Make a note of the position of the screwdriver slot and compare it to the position of the lean adjustment. E.g. No more running the saw or taking a hone to it until i know what the problem is and fix it. Keep them clean to ensure there is no blockage that restricts proper fuel and air inflow. If the valve adjustment is too low, the valve inhibits the flow of air and fuel, causing the engine to shut down as soon as the throttle is withdrawn. Thread . Clockwise is generally the direction you turn to make the mixture leaner, and counterclockwise usually makes it richer. This can be quite dangerous as the chain might damage anything in its vicinity immediately after the cord is pulled. High Speed Fuel Adjustment (marked H on carb, this is the high speed jet) This is the adjustment that controls the proportion of fuel in the combustible air/fuel mixture at cutting speed. A dirty air filter -- which filters air coming through the intake port -- or spark arrestor -- which filters the exhaust -- impedes air circulation and kills the engine. If this adjustment is set too low, the engine will die when the throttle trigger is released. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'thejimbosliceworkshop_com-banner-1','ezslot_7',111,'0','0'])};__ez_fad_position('div-gpt-ad-thejimbosliceworkshop_com-banner-1-0'); And the chainsaw bogs down because of no filtration. Adjust this screw second. Start with the air filter housing filter and air filter, and take off the bolts holding down the carb and gasket. Use the hacksaw to cut a flat rectangular slot on the top of the screws. This site is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. This can also affect the airflow in the engine, causing it to stall. But before all that I will figure out how to do a pressure and vac test to diagnose and correct possible air leak problem? Or maybe gas varnish in the screen filter at the base of the metering needle. After revving it up to max RPM and holding, we adjust the high speed rich, causing it to slow down and blubber, developing little power. Chainsaw Stalls At Idle - ARKHENO.COM That is what needs to be done before you tear it apart, do a vac test or go straight to a low air pressure test and find the source of the leak. Idling your chainsaw for a minute or so is quite ideal. In this case, the filter is likely only partially clogged, so it will allow enough air to the engine for it to run on idle, but not enough to sustain full throttle. If you notice damage or corrosion, its time to abandon the maintenance and simply purchase a new carburetor, as this one is beyond repair. There could be multiple reasons why your chainsaw dies. Save my name, email, and website in this browser for the next time I comment. This controls the air/fuel mixture when it's idling, or resting at lower speeds. Keep turning the screw until the engine starts to load up. Plus, as I mentioned beforehand, an imbalance in the air and fuel ratio disrupts the chainsaws operation and it dies down. These saws have what is called a fixed jet which is set from the factory. Fuel can begin to degrade as quickly as 30 days after purchase. Reason 4: Rough and Fussy Fuel Pump Diaphragm. This is a dangerous condition and should never be allowed.2. A chainsaw engine has three basic modes, i.e. What youll hear this time is a saw being adjusted for full rev. A Poulan chainsaw won't stay running if the air filter is dirty or has a buildup. Tips from a Professional. No visible signs of dirt, bad gas, etc. It causes the same problems and brings in unnecessary air. First, it could be that the carburetor, spark arrestor or the air filter are dirty. When you press the throttle, the engine kicks off and the chainsaw starts looping. Slowly turn in the screw until the engine surges or starves for fuel. A few minutes of idle time helps regulate the engine temperatures so that your chainsaw gets ready to operate at WOT (wide open throttle). Better safe than sorry! Ensure the chain comes to a stop when the engine idles. The built-up gas gets stuck inside and harms the chainsaw further. Throttle response may also be sluggish and the engine would smoke and perform poorly. I've never worked on a Zama C1M carb. Adjustment and Tuning of a Chainsaw Carburetor Like the air filter, it is an inexpensive part to replace, but greatly affects performance. Uh oh, I took the saw apart today and here is what i found: [video=youtube;2n59Jj849b4]http://www.youtube.com/watch?v=2n59Jj849b4[/video]. PoulanPro. You are using an out of date browser. Check fuel line for holes or cracks. Know that there can be more reasons why your chainsaw idles but dies throttle. Was the gasket there when you tore down the carb? I use the same clean 2-cycle gas in three other machines with no problems. Chainsaw running out of control! Will not Idle! High idle! Air leak! The high-speed setting controls the maximum engine RPMs. Carbon clogging the exhaust port or spark arrestor screen can cause a saw to run as if the carburetor requires adjustment. Try to set the speed at about 2700 RPM. A dirty fuel filter restricts fuel flow, which also kills the engine. Or, the carburetor adjustment might have simply slipped. Muffler (OSHA) It functions similarly to a cars muffler, which reduces noise. For a better experience, please enable JavaScript in your browser before proceeding. Each is considered a top old chainsaw brand in its own right. The Carbon disposition in the muffler also causes this issue. Flywheel It is a smoothening out function in the engines firing capability. Like said before check cylinder condition. I have experience using power tools for a variety of tasks such as construction, household, gardening, cleaning, etc. You should ask a professional to help you clean up the dirt or just get it changed. It has a throttle shaft and plate. Now slowly turn the adjustment screw out and the engine should run better. Have you peeked in the spark plug hole at the cylinder walls? Chainsaw idle adjustment. For a better experience, please enable JavaScript in your browser before proceeding. When such a clog occurs, the exhaust gasses will not be able to exit the engine, and it will cause your chainsaw to die. . Throttle Interlock It keeps misuse and accidents for occurring. Nous partageons galement des informations sur votre usage de notre site avec nos rseaux sociaux, publicitaires et partenaires d'analyse, You are trying to build your own DIY project but bamm! Stihl 180 Starts And Stalls Reason CIMFLOK.COM Haha, no but then again I've only been down here for a year I'm originally from upstate. Have you tried backing out the idle screw? The choke switch aids the engine starting by increasing the amount of fuel entering the engine, or enriching the air-fuel mixture. Husqvarna Chainsaw Stalls at Idle-SOLVED | Power Tool Hunter Register today and take advantage of membership benefits. This video provides information on how to troubleshoot a chainsaw and the most likely defective parts associated with this problem.Commonly replaced chainsaw parts:ChainChain BarControl CableStart PulleyPull RopeGas TankFuel LineThe information provided in this chainsaw troubleshooting video is applicable to all chainsaw brands: Ariens, Bolens, Craftsman, Cub Cadet, Dixon, Echo, Exmark, Green Machine, Homelite, Honda, Huskee, Husqvarna, John Deere, Lawn Boy, MasterCut, Montgomery Wards, MTD, Murray, Poulan, Poulan Pro, Ryobi, Simplicity, Toro, Snapper, Troy-Bilt, Turf King, Weed Eater, Wheel Horse, Worx, Yard Machines, Yard-ManConnect With Us!https://plus.google.com/+repairclinichttps://www.facebook.com/RepairClinichttps://www.twitter.com/RepairClinichttp://pinterest.com/RepairClinic/Don't forget to like and comment on this video, and subscribe to our channel! When turning the screw clockwise or counterclockwise, watch for when the engine's behavior changes both while you're throttling it but also when idling. I have seen/taken apart a couple pistons and clyinders but i havent really seen much of what scoring looks like first hand. This could cause your saw to overheat and is likely to damage your piston rings or seals. Know that there can be more reasons why your. An important part of diagnosis of engine stalling is to remove and examine the spark plug. Hunker may earn compensation through affiliate links in this story. The piston usually expands more than the cylinder walls, and as a result, the oil film between them thins down. NOTE: If you do not have a tachometer, set the RPM level so that the saw four cycles or blubbers at wide open throttle. If you put away pressure from the throttle, the chainsaw will stop. In the article, I will explain this in more detail to help you tune and optimize your carburetor setting. Our mechanic is on vacation for the week but when hes back im sure he could probably help too. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. Your chainsaw can lose power when youre using it because of a dull chain, or insufficient lubrication. Your chainsaw is said to be idling when the engine is on and the throttle isnt pressed. For more information, as to how a carburetor can cause this symptom, please see our carburetor section. When dismantling your carburetor for rebuilding, its a good idea to take photos as you go, to make reassembly easier. That may require raising the idle up to prevent the engine from dying. Chainsaw Idle Adjustment. Tips from a Professional All of a sudden your chainsaw starts malfunctioning. The burn does not produce much heat, so the power stroke is weak. It's best to check the owner's manual, or do a web search for your make and model, to ensure you've found the proper screw or screws to adjust. -Clever Jeff . This slightly rough sound (or 4-cycle sound, as its sometimes referred to) is where you want it to be. Check that your low speed adjustment still works as well as before you adjusted the high speed jet. Next take off the primer bulb and cover, and make a note of how the lever, spring, and hinge pin go together on the inside of the carb. However, the basic reason is mostly because of insufficient fuel supply to the engine. The muffler gets clogged. Check the Filters. To do this, detach your carburetor from the chainsaw and fix it on a bench vise. All rights reserved. If you dont have a tachometer, try to set the speed so the saw idles as high as possible without engaging the clutch. Low and high adjustment Its function is to control the saws idling speed. Carburetor Adjustment ProcedureThe following procedure should be followed to insure proper carburetor adjustment: (1) Check the air filter and clean it if necessary. The whole metering diaphragm ensures that when the fuel is being used, the diaphragm gets pulled down. All rights reserved. Be sure to use the correct gasoline:oil mixture ratio recommended for your chainsaw.Most Chain Saw Engines Have Three Carburetor Adjusting Screws:1. Now slowly turn the adjustment screw out and the engine should run better. Three-screw carbs are trickier to tune, so be careful when adjusting the high-speed performance screw. This could be caused by a combination of things. Why Does My Chainsaw Lose Power When Cutting? Know your dos and donts and know your chainsaw well. For a smooth and functional chainsaw, clean or replace your clogged air filters. Clean the internal parts of your carburetor now with A carb kit can be purchased to help clean and rebuild a plugged carburetor. In that case, there is a rather simpler technique for making the screw adjustment. The Top 9 Old Chainsaw Brands - Upgraded Home Take note of where the screw is when it runs lean or rich. While the air filter protects it from airborne particles, the fuel filter protects it from particles found in the fuel. Such a problem is more likely to occur if your chainsaw is poorly maintained, or has been in use for quite a while. Similarly, turning the screw out causes the mixture to become rich due to a high fuel supply. Start by adjusting this screw as you would for the single-screw carbs. The idle mode is important as it disengages the engine from running the saw chain. The chainsaw will die. If youre adjusted too lean itll run out of gas and die, or die when accelerated. Top Reasons Chainsaw Starts, Then Stalls - YouTube Unscrew the screws at the bottom of the carb and remove it, pulling the bottom off and removing he gasket and diaphragm. This is a description of why the run the way that. Take the muffler off and look in through there or get a flash light and look in through the plug hole and see if you can figure out what's up. An adjustment that is too lean will also produce insufficient power and is more likely to damage the engine through lean seizure. For chainsaw carburetors, balance is critical. If the Stihl chainsaw does not keep speed and stalls idling, you can be almost 90% sure that it has a violation in the fuel pump system, as a rule, it is the air leaking into the crankcase through the gasket of the sump, or, much more often, through the oil seals crankshaft. How To Troubleshoot And Adjust The Idle On A Chainsaw In colder temperatures, you can go a bit higher than a minute but avoid making it a regular practice as it may consume fuel unnecessarily. The carburetor controls the ratio of fuel to air coursing through the engine. Fortunately, air filters are easy to locate on top of the carburetor clean and replace if necessary. The diaphragm and its valve get rough and fussy over time. So when should you adjust the idle? STIHL supplies chainsaws in a variety of equipment versions and for all purposes, with power ratings from 1.3 kW to 6.4 kW (1.6 HP to 8.7 HP). We are compensated for referring traffic and business to Amazon and other companies linked to on this site. There is a reason that piston is scored up that way, you need to find out what caused it, my bet is an air leak. It can also happen if the carburetor is overfilled. If your chain does not rotate, skip this step and go to the next. Always stop a saw before the tank runs completely dry. The chainsaw stalls at high speeds In the event that the tool stalls at high rpm, there are three parts to check: the air filter, the fuel pump and the gasoline filter. Chances are that the RPM setting has changed since you optimized the fuel mixture adjustment. (8) Set the high speed fuel adjustment. You might see that your chainsaw functions on idle but hesitates or dies when throttled. With time, your filter gets clogged with harmful particles. We like to say, as close to the smooth as you can get it, but still just slightly into the rough.This one is larger than the first, and requires more time to load. Now you noticed that your Chainsaw idles but dies throttle. Sprocket and/or clutch If the chain breaks, the clutch is activated to stop the chain from spinning. The built-up gas gets stuck inside and harms the chainsaw further. With all three of these screws, you'll follow the same process as for the single-screw timing adjustment. I'm impressed." Common reasons why a chainsaw starts then dies - Kyle's Garage The throttle valve (butterfly) simply cuts off the supply of combustible air/fuel and the engine stops. How Do You Fix a Chainsaw That Wont Stay running? Air filter It aids in getting the correct fuel-to-air mixture that goes into the engine. Disconnect the fuel filter from the fuel lines, and at this point you can either clean or replace the filter to solve this problem. To find out your starting point, fire up your chainsaw and get a flat-head screwdriver ready. An adjustment that is set too rich will not allow the saw to reach the RPM level necessary to build maximum power. Chainsaw Buying Guide | Buying a Chainsaw | STIHL USA JavaScript is disabled. Electric vs. Gas Chainsaw: Which One Is Better? Generally speaking, the more power your chainsaw requires, the more fuel it will burn. You can download Zama's technical manual from zama's website. To replace the fuel lines, simply disconnect them from the fuel filter and the carburetor, and replace them with new ones. Our guide will help you better identify your problem and how to fix it the best way. An adjustment that is set too rich will cause the engine to load up and die at idle speed. working, idle, and stop. Running at full throttle right away causes the pistons to expand thermally. Also, you can try using 10w40 chainsaw bar oil.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'thejimbosliceworkshop_com-large-leaderboard-2','ezslot_8',112,'0','0'])};__ez_fad_position('div-gpt-ad-thejimbosliceworkshop_com-large-leaderboard-2-0'); This is mostly because of poor carburetor adjustment. When dismantling your carburetor for rebuilding, its a good idea to take photos as you go, to make reassembly easier. The fuel runs from the fuel tank to the carburetor through these veins. Stihl MS880 runs at high idle then dies. Or, these veins can be detached and replaced as well. You might see that your chainsaw functions on idle but hesitates or dies when throttled. Select gasoline with a minimum octane rating of 89 and a maximum ethanol content of 10%. The partially burned mixture is expelled into the muffler and exits the saw as smoke. If you think youve found just the right spot squeeze the throttle and the saw should rev up without any hesitation or stumbling. This is a general guide for your repair; for more detailed information on your model, refer to the owners manual. Receive money-saving advice and special discounts! Clogged filters will restrict gas flow. With low pressure can of compressed air, carefully blew out the small openings. To troubleshoot your chainsaw, use the following step-by-step approach: Step 1: Air Filter: We can easily inspect the air filter before examining the carburetor, which could be causing the chainsaw to stall. No luck, the longest i got it running was about 20 seconds and it wildly revs up and . However, when some chainsaw engines are starved of fuel and run leaner than usual, they can only be kept runningby keeping the choke on. When gasoline is left standing in the fuel lines and carburetor, it partially evaporates, leaving behind a varnish-like substance that clogs the fuel system. This is screw is critical to be careful with, because setting it too lean or rich can cause serious engine damage. Worn crankcase seals and malfunctions of moving parts inside the engine itself can cause stalling. A carburetor kit will helps with this. For a smooth and functional chainsaw, clean or replace your clogged air filters. Los Angeles, CA 90013 The fuel filter is usually in the gas tank and easily removable and replaceable. depending on the screw type, you may need a Single-d or a Double-d adjusting tool. Over time, when your chainsaw has been running on full throttle, carbon deposits can build up in the exhaust port, muffler, or spark arrestor. So if your chainsaw bogs, know that it isnt receiving enough fuel. That is the solution to this problem is to ensure the screws are tight. Fix #4: Unclog the Air Filter. You may be able to purchase a carb kit, and clean and rebuild the carb, rather than replacing it. Unfortunately, they also often prohibit the saw from achieving maximum performance. Most chainsaws either have too high or low RPMs at an idle state. This can result in one or more of these parts becoming clogged. When the RPMs are too high, it can be pretty dangerous as the chain can get engaged. Most chainsaws either have too high or low RPMs at an idle state. You'll either tweak a single screw or three separate ones, but the premise is the same in both instances. Next take off the primer bulb and cover, and make a note of how the lever, spring, and hinge pin go together on the inside of the carb. In this blog post, I shall discuss everything you need to know to optimize your chainsaw's idle condition. Turn it so you know where the lean and rich points are, and then find the medium between them. It is not the gas. I've used It is also helpful to be able to adjust the carburetor for a variety of applications; chainsaws installed on chainsaw mills for example should have their high speed adjustments set rich because of the type of stress on the saw. Homeowner Chainsaws - Mid Range Chainsaw Features | STIHL USA A chainsaw has two filters to regulate air circulation and one to keep debris out of the fuel, and all of them need regular servicing. And the air filter is designed to protect the engine from polluted air. In post #10, the picture of the carb you can see the remains of the black gasket on the top cover. The problem could be a lack of air or a misfiring spark plug, and both of these problems are easy to check and remedy. If the cylinder does need to be honed a little though (or replaced) how will i know? Chainsaw races at idle: How to fix it - Kyle's Garage This will cause the needle to stay in its place and no fuel will flow to the engine. You are most likely to not be able to notice a break in the veins. Clean your chainsaws bar oil holes to avoid this. The correct carburetor adjustment will allow the saw to produce maximum power, extend the duty cycle of the engine, produce minimal smoke, idle smoothly, rev up nicely and give trouble free service.An over rich carburetor adjustment is when the proportion of fuel in the combustible air/fuel mixture is so high that the fuel does not burn well. Slowly we lean the low speed adjuster by turning it in, till the idle climbs and it then starts to die. If the filter becomes clogged, not enough fuel will reach the engine for it to run properly. Pull cord Its the chainsaws startup mechanism. Take care when removing the fuel lines with a twisting and pulling motion, and take off the carburetor linkage. Because your chainsaw will idle, but dies when it is revved up to full power, it means that the filter is only partially clogged; it will allow enough fuel to the engine to run on idle, but not enough to sustain full throttle. A chainsaw should only idle for a few minutes to warm up the engine and the cutting chain. How to repair a chainsaw that dies when you give it gas 1. Air leak! Your chainsaw wont run properly if the engine doesnt receive proper air. With this step accomplished, you have effectively set your chainsaw to function at an optimum speed with no lag. They all come with their own benefits and downfalls, as well as various product offerings. If the filter becomes clogged, not enough fuel will reach the engine for it to run properly. Before you call it a day on adjusting your carburetor idle, test its performance while throttling and idling. Afterward, you can use a readily available flathead screwdriver to adjust the screws as you want. If your chainsaw often sputters and stops all of a sudden, instead of letting out a proper high-frequency noise whenever you push the throttle trigger, something is meddling with the engine's fuel combustion. Both are easy to remove and service. When the trigger is released, this butterfly valve controls the amount of air-fuel mixture that enters the engine. The choke is normally switched off after the engine runs. If you start the chainsaw easily, and it runs smoothly, the idle's doing just fine and there's no need to tinker with it. An extremely lean adjustment will cause the engine to die, too.3. Move the throttle plate on the carb to the idle position manually. If your chainsaw engine dies at full throttle, check the following parts: the carburetor, fuel lines, fuel filter, air filter, and muffler. Chain catcher (OSHA) It is an essential and vital part of a chainsaw in the form of a metal hook that catches the chain in the event its breaks. If your chainsaw stalls instead of producing the reassuringly high-pitched sound of a healthy engine when you press the throttle trigger, something is interfering with efficient fuel. JavaScript is disabled. It may not display this or other websites correctly. Then ensure one very simple thing. On many chainsaw models, you can control the amount of fuel that the carburetor sprays into the combustion chamber by turning one of its adjustment screws. If you do so, ask for tips and watch how it's done, so next time you're sure to strike the ideal balance on your carburetor idle. It may not display this or other websites correctly. Your chainsaw wont run properly if the engine doesnt receive proper air. There are several factors may make your saw not work properly. The ethanol-water mixture clogs the fuel system. It's safe to say that you should never have to completely open or close a timing screw to its maximum or minimum. Tips from a professional. Chainsaw Idles but won't Rev. Tips from a Professional On right-handed chainsaws, the idle screw tends to be on the left. With Helpful Tips, Chainsaw Pressure Test Kit. In that case, go to a chainsaw shop or hardware store to have a pro check things out. Finally, if the chainsaw stalls out and dies when it's working under a load, that's usually an idle problem as well. Idling it for longer durations wears the clutch bearing and causes carbon buildup at the exhaust. Using the screwdriver, set the screw to an optimum point at which the chainsaw neither dies at idle, nor the RPMs are high enough to engage the chain. The sweet spot for the perfect idle is usually halfway between these two points. First, locate the "LA" screw. The proportion of fuel flowing out and air flowing in is equivalent. Make sure there's not too much smoke, that the engine purrs smoothly. Things might be a little more complicated if the problem is related to fuel delivery or to the composition of the fuel itself. Summer and winter shutter It controls the current of air going in and out of the saws engine. You can clean them and reuse them if you dont have a spare one on standby. If the chainsaw won't stop spinning when idling, or it's smoking when it idles, it's getting too much fuel and running rich, so you'll need to back it down a bit.
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