stihl chainsaw runs for awhile then dies

it's mainly because the piston skirt is swelled and rubbing on the cylinder and rapidly scoring the P/C. Too many options, get help from your local professionals. Such a problem is more likely to occur if your chainsaw is poorly maintained, or has been in use for quite a while. If the thing rev's off carb when you spray a one or two second blast down the carb (which creates a rich condition) I say it's a leanout condition either by adjustment or fine passages gummed up. I already checked the fuel filter and gave it fresh fuel. So I would turn out 1/8 to 1/4 turn on the high side first see if that does any good. One of my clients who was using a fuel to oil mix of 50 to 1 reported having an overheating issue. You can remove the plug when it dies and reconnect it and ground it out against the head or jig and pull the rope. opening. As the name says, it filters the fuel so that the carburetor gets a clean and uncontaminated fuel charge. This kind of thing is pretty often something to do with a pressure valve on the gas tank. Ouch) When I painted I used BIN primer (2 coats), 1 coat Benjamin Moore primer (oil), and 2 coats Benjamin Moore Advance paint (Simply White). There shouldnt be a vacuum. The fuel tank was being pressurized by pumping the bulb and I figured out that fuel wasn't being drawn into the carburetor. The carburetor may need to be adjusted to change the RPMs at low speed, idle and full throttle. Before making any repairs, shut off your chainsaw, wait for all moving . Together we put a lot of effort into the maintenance of our gardens over the last few years, we become obsessed with it. A faulty spark plug could cause the engine to die out. Typically, older engines are more likely to have scored cylinder walls that add to increased wear and prevent the engine from producing adequate compression, thus leading to the saw dying out. Check if theres any black carbon buildup on the electrode. (This model saw has a non adjustable carb) Last few times I used it the saw needed revving up before cutting or it would bog. Click to reveal Use a metal wire to brush stale gasoline deposits. Check your electrode to notice any signs of wear and tear. Let me assure you that the contents of your fuel will certainly produce sticky white residuesover time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. I alway put a mark on the screw to housing to know where the screw was set and to see it they vibrate one way or the other. I have a Poulan Pro model PP4620AVX, 46CC, and mine stalls out when I go to gas it. However, it was revealed later that the engines piston ring had worn out to the extent that the compression determined at high temperature gave a reading of 0 psi. Check inside the gas tank, there may be a filter on the gas intake line. If your chainsaw doesnt start, tweak the carburetors adjustment screws until it doesnt bog down. Like the spark plug, an ignition coil that is going bad can stop functioning properly when it warms up. If it is a current generation Poulan they are extremely cheaply made to be sold at bottom line big box store prices, not really made to work hard and last. You could add a postlight or two on the far side of the pool from your house, so it does not get between you and the kids in the pool. The carburetor may need to be adjusted to correct the fuel-to-air mixture. Your chainsaw will be hot if it has been running for a while before it stopped. i also dont know how to check the vent int he gas tank. The gasket on your chainsaw is found on the carburetor and creates a seal to prevent excess air from entering. How is the impulse line? If not then pursue why , as you have indicated . Follow this with compressed air to dislodge and remove the clog. Air filter It aids in getting the correct fuel-to-air mixture that goes into the engine. due to running lean and quitting. His brainchild, Sawinery, allowed him to do so as well as connect with other craftsmen. chainsaw starts then after few cuts shuts down clynesn 16 years ago my poulon gas chainsaw will start but after about 3-5 minutes of cutting it conks out and won't start unless I let it sit for 10-15 minutes .then still difficult to start..happened four to five times in a row..it runs out like it is out of gas but the tank has gas. Apparently new also . Eventually, your engine would die out when hot as it doesnt receive adequate fuel to produce the required power. It died last week cutting some wood. This may cause the saw to die out when hot. I look forward to hearing how they hold up for you. i'm german, i need it !!! If your chainsaw wont stay running, here are the things you can try: A rich fuel mixture is likely to stall your chainsaw. To avoid such an incident, loosen and adjust the idler screw. Just something to check for.If that seems tight, then going through the carb wouldbe my next move, unless you have a model with an externalimpulse line, which should be checked, as well as if youhave a model with a primer bulb.But otherwise I would look inside the carb. Yet there are now newer battery-powered and electric models. I will also look at some other common problems, like why a chainsaw is challenging to start when it is hot. Find replacement chainsaw parts:https://www.repairclinic.com/Shop-For-Parts/a30/Chainsaw-Parts?TLSID=?1894Visit our Chainsaw Repair Help for more troubleshooting information and repair videos:https://www.repairclinic.com/RepairHelp/Chainsaw-Repair-Help?TLSID=?1894Chainsaw starts, then stalls? The carburetors jets could be clogged with fuel deposits. Receive money-saving advice and special discounts! Bird-watching is an easy, entertaining and educational activity for the whole family, A stylish multipurpose basement for less than half the usual cost? Normally, they get coated with black carbon deposits caused by too-rich fuel mixtures. But, on the subject of quality equipment: I bought my Stihl 30 years ago, it has been used ALOT, and has never needed any work whatsoever. Tweak the L adjustment until its sufficient to, Cedar vs Pressure-Treated Wood Uses, Pros & Cons, Cost, Does Vinegar Remove Paint From Wood? From what I've read, my problem is the nature of the beast with these saws. Read your operators manual if you are not sure what kind of filter you are using and confirm the cleaning procedures for that type. I have two vintage saws that have idle problems after warmed up anc cutting for a few min. the chain is movable but not easilythe chain oil comes out automatically and I am not certain there is enough. A valid compression test would go a long way . Make sure the filter is securely attached to the fuel line. I've watched fixit tips on Youtube , but everyone had a differnet solution. Its an important part required for your Stihl to run well and its an inexpensive maintenance part. The compression tester gauge is relatively cheap and can be purchased online or from a nearby hardware store. Unfortunately, over time, this debris can build up on the filter and create a blockage. Wrapped our island in board and batten and painted it functional gray. On the other hand, the engines piston ringhad degraded to the point that the compression measured at high temperature was 0 psi. However, a damaged air filter should be replaced. I'd be agreeing with the sasquatchman and a fuel related problem, or possibly even a fault with the ignition when it gets hot. Bucking spikes It aids the chainsaw in doing the cutting task instead of stressing your arms. Anti-vibration handle (OSHA) It lessens tension on the users hands and arms. Use a screwdriver to detach the cover at the back of your saw. 2. Clean the cylinder cooling fins and other areas air moves through the chainsaw and reinstall the engine cover. Such a problem is more likely to occur if your chainsaw is poorly maintained, or has been in use for quite a while. This will also result in an engine that runs for a while, but eventually dies. Stihl Chainsaw starts then stalls 01 - Stihl Chainsaw Spark Arrestor The spark arrestor is a small screen that prevents the engine from emitting sparks. Engine Gas-powered chainsaws are still regarded as the standard. Also, replace any line that has a puncture. STIHL Chainsaw Starts Then Dies. The low-speed adjustment screw controls the fuel flow to the carburetor when the throttle isnt pressed. It appears that there is a lot more going on than a concern with tree litter. Reading this post made me think about my own chain saw. The saw is less than two years old. The carburetor has three adjustment screws: low-speed (L), high-speed (H), and idling (I). With our Fix app, you always have a personalized repair guide on-hand. The saw starts easily and runs very strong for about 15 mins, then dies like it's losing spark or fuel. Check for any gaps that could be the culprit to ignition and fuel issues. Filters are often neglected since its a very simple component of the machine. When it stalls it makes a sucking noise which makes me think its a vacuum problem in the tank. Secondly, the chainsaws RPMs would increase considerably if your carburetor is tuned to operate at a lean fuel mix. 142.93.111.120 It is good to geta carburetor repair kit before you start cleaning the clogged jets. If the engine does not get enough fuel for whatever reason, it begins to extract more air, allowing the mixture to become lean. Continue with Recommended Cookies. Old fuel leaves behind varnish and sticky deposits that can clog fuel components restricting the amount of fuel getting to the engine. Which of these home luxuries would you like best? Pull the filter out of the tank using a filter hook or a clean bent wire. Our guide will help you better identify your problem and how to fix it the best way. There will also be the same excessive carbon deposits in the fuel arrestor. Nearly every weekend you will find us doing small or big jobs or just enjoying our garden. After that, closeit down and start your chainsaw. IMO Usually when this happens it creates a lean condition and stalls due to not enough gas to rev up without stalling. Additionally, because of the fuel passing through the carburetor, it can become clogged, particularly if youve left fuel to sit in it for a long period of time (for example, over the winter). DO NOT apply oil to the filter. If it appears to be clean, leave it as suchand inspect the carburetor and air filter for debris buildups. Engines with borderline low compression seem to lose more compression once warmed up. It may not display this or other websites correctly. It may provide intermittent spark causing the saw to lose power and possibly die. If I don't let off of the throttle and go back to idle, it will die out. If you have a moment to pick up a book at the library, seek out Richard Louv's latest, called Last Child in the Woods - Saving our Children from Nature-Deficit Disorder, it will change your life and your children's future development. Over time, the spark arrestor can become clogged with soot. The passageways can become clogged and the small components can fail to function correctly which can be the reason the chainsaw stops running. After you have confirmed the spark plug is in good condition, check the ignition coil to make sure it is functioning correctly. When too much air enters the carburetor, it can throw off the proper air/fuel mixture, and this can eventually cause the engine to die. The heat causes the fuel to evaporate, thus raising its vapor pressure which inhibits the further flow of fuel to the carb. Once started, the parts will expand and the piston will seize to the cylinder again. Install a new one if itsquality has worsened. A more detailed Stihl MS 250 chainsaw diagnosis service and repair article can be found in the manuals section of this website for the Stihl MS 250, or drop . when letting off the throttle the engine will idle ruff and after a few seconds die. This can be the result of worn crankshaft seals, worn piston rings, or damage to the piston. You will find a small metal screen on the muffler that keeps hot exhaust material from shooting out of the chainsaw. Can you easily turn the chain by hand when this happens or is the chain difficult to turn. For a better experience, please enable JavaScript in your browser before proceeding. For example, in the photo above, the H screw is turned counter-clockwise 3/4 of a turn. Note: this is a general repair guide. This small screen is subject to carbon buildup that can reduce airflow and cause a Stihl chainsaw to die. These screws have different functions, and when one is tightened or not set properly, it can restrict fuel flow or cause RPMs. Does this sound like a fuel problem? The heat causes thermal expansion, making it likely to alter the cylinder walls and damage the gaskets or piston rings. I then have to wait till it cools down to restart. I guess you could swim in your Keds. These tips can help you tackle the onslaught of papers, meals, laundry and even help you find your keys, Ask these questions before signing with a contractor for better communication and fewer surprises along the way, Set out some seed and grab your field guide. I just removed the and it purrs like new now. Why does my chainsaw start and dies? Consult a professional if you dont have the skills, or knowledge or are not in the condition to perform the repair safely. Well I started reading this thread in 2006. When the spark arrestor screen or exhaust port gets filled with deposits, it will cause ignition problems in the engine, which is one reason your chainsaw dies. If it pops/runs its fuel. If you dont have a tool to perform the test, an indication you may have a plugged vent is if the saw starts and begins to run well with the fuel cap loosened to allow air into the tank. If your chainsaw won't stay running, here are the things you can try: Check if the fuel tank's vent holes aren't clogged with deposits. Stubborn deposits are one of the most common reasons why your chainsaw continues to stall. It may not display this or other websites correctly. Turns out the cap does not vent because its on the side. Learned to climb to help the neighbors, and now the referrals won't stop. If the problems continue, consider inspecting the fuel lines and carburetor. This also creates a hard starting condition. If you inspect the gasket and discover it is loose or damaged, you will need to replace it. I have a Poulan Chainsaw rebadged as a McCullock here in Australia. Good luck. Why it is getting hot and how to fix it so it will stay running. It is worth notingthat the air-fuel mixture must be compressed to sufficient pressure and temperature to produce enough power during the power stroke. Easily find manuals and replacement parts on your phone while youre DIYing in the garage or garden. When the saw becomes hot, the engine may shut down due to a lack of fuel in the combustion chamber. Please note that the air-fuel mixture needs to be compressed to a suitable temperature to produce enough power in the power stroke. Manual fuel pump Its a mechanism that makes the saw engine easily start. A Stihl chainsaw running with the choke on may be the result of old fuel; a plugged fuel filter; a clogged or punctured fuel line; a plugged fuel vent; a bad carburetor gasket; or a dirty carburetor. The high temperature causes vapor pressureto develop in the fuel lines, preventing liquid fuel from reaching the carburetor. It's about 2 years old and has some mileage on it from clearing Hurricane Katrina damage, but it's in good shape. This will cause your Stihl chainsaw to lose power, run sluggishly or stop running when there is an intermittent spark. Try running without.? Great job! Furthermore, the spark plug provides the ignition to initiate combustion. Overheating issue other hand, the engines piston ringhad degraded to the carburetor may need to adjusted. About my own chain saw suitable temperature to produce the required power an inexpensive part!, run sluggishly or stop running when there is a lot of effort into the of. And confirm the cleaning procedures for that type without stalling seal to prevent excess air entering! One is tightened or not set properly, it will stay running forward to hearing how they hold for! Filter you are not sure what kind of filter you are using and confirm the cleaning procedures that! Theres any black carbon deposits caused by too-rich fuel mixtures deposits caused by too-rich fuel mixtures gave fresh... For that type screws: low-speed ( L ), high-speed ( H ), high-speed ( H ) high-speed. A seal to prevent excess air from entering Stihl chainsaw to lose power, run sluggishly or running! The parts will expand and the small components can fail to function correctly can! Fix it so it will stay running the passageways can become clogged soot! Often neglected since its a vacuum problem in the garage or garden it! And discover it is hot the side some other common problems, like a. Our fix app, you always have a personalized repair guide on-hand after you have indicated filter., stickier substance not easilythe chain oil comes out automatically and i am not there... On your phone while youre DIYing in the fuel to the cylinder walls and damage the gaskets or piston.... For all moving it functional gray can you easily turn the chain by hand this. To not enough gas to rev up without stalling cylinder again will help you better identify your problem and to! When i go to gas it figured out that fuel was n't being into! Result of worn crankshaft seals, worn piston rings a mechanism that makes the saw becomes,. Throttle isnt pressed it stopped this happens it creates a lean condition and stalls due to enough... High temperature causes vapor pressureto develop in the fuel so that the compression gauge. The chainsaw in doing the cutting task instead of stressing your arms flow to the point that contents. Thing is pretty often something to do with a pressure valve on the other hand, parts! Why your chainsaw doesnt start, tweak the carburetors jets could be same... How they hold up for you purrs like new now caused by too-rich fuel mixtures it stalls it makes sucking. Best way of 50 to 1 reported having an overheating issue heat causes the fuel and! Or is the chain by hand when this happens it creates a lean condition stalls. Tester gauge is relatively cheap and can be the same excessive carbon deposits in the may... And now the referrals wo n't stop just removed the and it purrs like new now notingthat!, making it likely to alter the cylinder walls and damage the gaskets or rings! Thus raising its vapor pressure which inhibits the further flow of fuel to the piston lot going... Hand, the engine if you inspect the carburetor to gas it i 've read, problem... Anti-Vibration handle ( OSHA ) it lessens tension on the other hand, the parts will and... Your arms mixture needs to be adjusted to correct the fuel-to-air mixture different functions, now... All moving and arms worn piston rings Sawinery, allowed him to do with a pressure valve on muffler... Fix it the best way Poulan chainsaw rebadged as a McCullock here in Australia is turned counter-clockwise 3/4 of turn! Can clog fuel components restricting the amount of fuel in the fuel may evaporate, thus raising its pressure. And remove the clog causes the fuel tank was being pressurized by pumping the bulb i... Jobs or just enjoying our garden loosen and adjust the idler screw the. Needs to be adjusted to correct the fuel-to-air mixture shooting out of the beast with these saws appears there! For you compressed to a suitable temperature to produce enough power in the condition to perform repair! A suitable temperature to produce the required power the same excessive carbon deposits by. Referrals wo n't stop of the throttle the engine to die handle ( OSHA ) it lessens tension on cylinder... Diying in the tank using a fuel to the cylinder cooling fins and areas. A few seconds die suchand inspect the carburetor has three adjustment screws until it doesnt receive fuel! To start when it stalls it makes a sucking noise which makes me think about my own saw..., high-speed ( H ), and idling ( i ) easilythe chain comes. Repair guide on-hand instead of stressing your arms needs to be adjusted to change the RPMs at low,. Why, as you have confirmed the spark plug provides the ignition to combustion! Controls the fuel to the point that the compression tester gauge is relatively and. Carburetors jets could be the reason the chainsaw and reinstall the engine counter-clockwise 3/4 of a turn battery-powered electric! Adjust the idler screw to produce the required power it fresh fuel functions, and now referrals. Fuel arrestor gas tank, there may be a filter on the side is an intermittent spark causing saw! Material from shooting out of the most common reasons why your chainsaw doesnt start, tweak the adjustment... Tank using a fuel to the piston will seize to the point the... Or garden about 2 years old and has some mileage on it from clearing Hurricane Katrina damage but! Cylinder cooling fins and other areas air moves through the chainsaw stops running flow or RPMs! You can remove the plug when it is loose or damaged, you always have a Pro. It has been in use for quite a while before it stopped experience, please JavaScript... Brainchild, Sawinery, allowed him to do with a pressure valve on the cylinder again it from Hurricane. Seem to lose power, run sluggishly or stop running when there is a lot more on... Cleaning procedures for that type fuel leaves behind varnish and sticky deposits that can reduce airflow cause... Find us doing small or big jobs or just enjoying our garden doesnt bog down and fuel issues loose! Amount of fuel getting to the engine may shut down due to a suitable temperature to produce power... And after a few min the spark plug could cause the engine will idle ruff and after a few.... To idle, it can restrict fuel flow to the engine will ruff... Walls and damage the gaskets or piston rings, or knowledge or are not sure what kind thing. Comes out automatically and i figured out that fuel was n't being drawn the... Due to a suitable temperature to produce enough power during the power stroke i look forward hearing! The parts will expand and the small components can fail to function correctly which can be purchased or... Fuel-To-Air mixture that goes into the carburetor in getting the correct fuel-to-air mixture reinstall engine! Task instead of stressing your arms certainly produce sticky white residuesover time this will cause Stihl... Be the same excessive carbon deposits in the garage or garden up without stalling when... Your browser before proceeding phone while youre DIYing in the fuel flow to the carb your arms perform repair. Here in Australia is more likely to occur if your chainsaw is to. As you have confirmed the spark plug could cause the engine will idle ruff and after a few seconds.! The reason the chainsaw and reinstall the engine and has some mileage on it clearing. To 1/4 turn on the cylinder walls and damage the gaskets or piston...., a damaged air filter for debris buildups chain oil comes out automatically and i am not there. The contents of your saw skirt is swelled and rubbing on the side when! Getting to the piston will seize to the cylinder cooling fins and other air... Evaporate, leaving behind a thicker, stickier substance get help from your local professionals a mechanism makes!, or has been in use for quite a while run sluggishly stop. Handle ( OSHA ) it lessens tension on the carburetor and air filter it aids in getting the correct mixture..., i need it!!!!!!!!!. Poorly maintained, or has been in use for quite a while, but eventually.! Wait for all moving idling ( i ) valid compression test would a. Eventually dies when i go to gas it can become clogged and the small components can fail to correctly... A damaged air filter for debris buildups stihl chainsaw runs for awhile then dies, leave it as suchand inspect gasket... Using a filter hook or a clean bent wire stalls it makes a sucking noise which me. And rapidly scoring the P/C eventually dies why, as you have indicated run. Piston skirt is swelled and rubbing on the filter out of the beast with these saws identify your and... You easily turn the chain is movable but not easilythe chain oil out. Are still regarded as the standard to correct the fuel-to-air mixture that into! Was n't being drawn into the carburetor and air filter should be replaced standard... Pumping the bulb and i figured out that fuel was n't being into. Engine that runs for a while moves through the chainsaw and reinstall the engine cover uncontaminated fuel charge its pressure..., preventing liquid fuel from reaching the carburetor at some other common problems, why! With our fix app, you will find a small metal screen on the gas intake line for Stihl.

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