Here are some major reasons chainsaws bog down when given gas: 1. There are bolts with inscriptions H and L. respectively rough and fine tuning. The chainsaw stalls at idle mode if the combustion chamber doesn't get an appropriate fuel supply. Have the H screw out two turns. May 20, 2020. Only show this user. Loosen the screw in a counter-clockwise fashion to increase idle speed or tighten it in a clockwise manner in order to decrease the idle speed. 2) Creep up on the H setting from below. The chainsaw stalls when the gas is pressed because there is no spark. Then start turning it out till you hit max idle rpms. If the air-fuel flow is increased to the engine, the idle RPMs increase to a point when the clutch is engaged, and the chain begins to rotate even without the trigger pressed. It will make the engine cease running at idle speed. It will blubber up to 6000 rpm. or how long you cut prior to letting off the throttle and the saw stalling out . When the engine idles to low or sputters, then slowly rotate the 'I' screw in clockwise direction until the chainsaw engine runs smoothly. Not having a lot of additional info as how long does the saw idle prior to actual cutting etc. The H screw regulates the Air/Fuel mix during . No luck, the longest i got it running was about 20 seconds and it wildly revs up and . It can happen when there is no good contact between the spark plug boot and the cable (high-voltage wire). and will not idle at low speed husqvarna chain saw 55 idles high even when idle screw is… 576xp runs great for 3 min,then dies ,spark plug dry. Turn screw back in a quarter to half turn and it should be idling smoothly. The first and easiest part of the saw to check when it's stalling is the air filter. Step 2. It's kinda like holding your thumb on a straw while it is in water then lifting the straw. Turn the "H" screw clockwise until the screw seats. Spark Arrestor. Usually when they won't idle after a long cut, it's from being too rich on the high side. Stihl chainsaw carburetors usually have three adjustment screws: one each for idle, low speed and high speed. How to Adjust the Carb on a Homelite Blower. If the filter becomes clogged, not enough fuel will reach the engine for it to run properly. A bad fuel line will cause the chainsaw to run lean (too little fuel or too much air in the mixture), and this means it will only run at idle for 5 to 10 seconds before it shuts off completely. Also on carburetors of some models, etc. After it was started, and at idle it works well, and when you press the gas it can stall. It manages the quantity of air incorporated with gas at idle mode. One a poulan 2125 I think, and the other is a poulan pro 35cc. An engine stalls when it's getting too much or not enough fuel from the carburetor. High School or GED - Okay I have 2 chainsaws. In this case, the soot clogs up the arrestor. I have a relatively new Husqvarna chainsaw that starts like a champ, but will only idle for a minute or so, then dies. 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. Place the blower on a flat workbench. The saw is 5 years old and been trouble free, still on original spark plug and been using Stihl synthetic 2 cycle oil. Gemo. 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 combustion.. If your chainsaw's chain keeps rotating even when it's not engaged, the throttle valve is adjusted too high, and it delivers the air-fuel mix to the engine at a large rate. If the saw is stalling when you pull . A cracked fuel line can cause fuel to leak out, and this will prevent it from entering the engine. Move to the next level if the saw does not start or will not run properly. The water can't leave the straw till air . Give it 1/4 of a turn - 7000 rpm. Local Time: 8:19 PM. Restoring the needle and seat contact areas in your carburetor The chainsaws will be adjusted by this adjustment screw. You need to set the mixtures for the carburetor. It's hard for one to pin point the exact cause, but here are a few possible causes along with why these poss. . 576xp runs great for 3 min,then dies ,spark plug dry … read more BAN OPE Tech Owner & tech 40 Years exp. The air filter is usually situated right at the back of your chainsaw. The issues might be a defective spark plug or simply lacking air in the system. The adjustment of the screw H affects the power and speed. Adjusting the Idle Screw. Puskin 56/1 MD 2005, Chişinău Republica Moldova. Assuming the engine is actually returning to a normal idle RPM and not high-idling, then its a centrifugal clutch problem. Start the Stihl chainsaw and allow it to run for about 10 minutes to warm up. If your chainsaw has been stored on a garage shelf for a while, its fuel might need replacement. Stalling at full throttle. The reason why there are so many fixes is because there are a lot of different reasons why the engine dies after it starts. The added fuel wets everything excessively and it makes it too rich to idle. . Not having a lot of additional info as how long does the saw idle prior to actual cutting etc. From felling trees to chopping firewood and carving, a high-quality all-round chainsaw is an arborist's best friend. When the engine idles to high, then slowly rotate the 'I' screw in counterclockwise direction until the chainsaw runs smoothly. 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. At idle turn the screw in or clockwise until the rps starts to decrease. Locate the three adjustment screws found on the side of the carburetor, just below the air filter. If the chainsaw's being stubborn and is hard to start, that's an indicator that the fuel and air mix are off. 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. I had the same fault and tryed everything like you. Some will idle OK, but die under load. Husqvarna Chainsaw starts then stalls. Upvote # 3 03-12-13, 12:43 AM cheese Forum Topic Moderator Over time, the spark arrestor can become clogged with soot. . If the engine is starved of fuel, it . Hi everyone, Stove season is over and cutting has started. It doesn't matter if you twist it too high or low. Apr 27, 2010. At that stage there is an automatic fast idle going. First, turn in the mixture screw until the engine dies or runs worse, then back out the screw (recommend turning ¼ to ½ turn at a time). Gum and varnish in a 2 stroke carb, especially a chainsaw carb are often the culprits of loss of horsepower (revs) when throttle is engaged. Then remove the spark plug and see if it is fouled; also check for the proper spark gap. Ideally, you will want the idle to rest at 650 RPM. The Idle Speed. Revved cleanly with throttle. The air filter is usually situated right at the back of your chainsaw. Fuel problems. Thread starter chad556; Start date Feb 26, 2011; 1; 2; 3 . Stale fuel and its residues are typically found in the bowl. Either the clutch is gummy and sticking, or the return springs are weak from excessive clutch slipping, which is usually from cutting at too low RPM. Low air supply. Start your saw and run it for a few minutes to warm it up. If it accelerates fine, go to Step 6. Rev (accelerate) the idling saw. NO CHANGE! Find replacement chainsaw parts:https://www.repairclinic.com/Shop-For-Parts/a30/Chainsaw-Parts?TLSID=?1894Visit our Chainsaw Repair Help for more troubleshoo. Don't adjust a carburetor on a cold engine, as the adjustment will be wrong. Chainsaw . Replace a seriously fouled plug. The saw should precisely match what you are doing - so a 1/4 turn in on the H screw = more revs. :thumbsup: Few others can move a few hundred tonne of wood with minimal effort. Went to cut wood tonight and it was hard to start and seemed to idle fine (perhaps faster than normal) but when I went to rev it to cut the motor would bog and die. Step 1: Remove the air filter to expose the carburetor: To begin cleaning your carburetor, remove the air filter first. Moreover, the idle mode increases our safety chain by disengaging the saw chain. Position the chainsaw bar so the chain won't hit anything during adjustment. Adjusting the carburetor to lean mixture leads to excess revolutions and failure of the saw. If the saw has been in use for many hours, it isn't unusual for it to clog and prevent air . 1) bad coil 2) bad plug 3) bad fuel cap 4) bad fuel breather 5) tank not pressure tight 6) carb loose 7) impulse feed leak 8) blocked screen in the carb 9) blocked high speed fuel passage in the carb Before you tear the carb apart, take off the air filter and get a bright light source and look into any ports you can to see if you can see any issues. #1. Most Chain Saw Engines Have Three Carburetor Adjusting Screws: 1. As karl pointed out it could be that the gas cap is not venting. Taking apart a carburetor on a weed eater can feel a little intimidating but it's actually really simple; you will only need a screwdriver. Location: East Jordan, MI. But it turned out to be the coil assembly so I replaced it with a solid state module and now I can honistly say it has never run better.Starts first pull early every time. Idle Speed/Throttle Stop - This is the adjustment that controls how much the throttle valve (butterfly) stays open when the throttle trigger is released. You need to disconnect the high voltage wire and check for a spark on it. Cost me $130.00 Australian dollars. Running a lean mixture for too long will cause irreversible damage to the internals of the engine. causes create the outcome you've noted. I checked and tweaked the hi, low, and idle adjustments, checked the air filter, cleaned the muffler, replaced the spark plug, poked out the carb, which then started leaking, so I got a new carb and replaced the fuel filter too. If the spark arrestor is clogged, the chainsaw may run stall or run rough. Common solutions for: Stihl Chainsaw starts then stalls 01 - Spark Arrestor The spark arrestor is a small screen that prevents the engine from emitting sparks. In most chainsaws, there are two adjustment settings that control the performance of the engine. Thinking that it's either a carb issue or something is up with the piston/sleeve, but I really don't know how to test either theory. Step 1: Remove the air filter to expose the carburetor: To begin cleaning your carburetor, remove the air filter first. Check the Filters. If it lopes up and down and dies after a long cut it's too lean on the high side. Chainsaw stalls at idle speed Cases are common when the chainsaw stalls at idle. It's generally best to purchase a carburetor rebuild kit prior to starting. Generally, the manufacturers will specify the required setting in terms of adjusting the screw setting by a turn or two. Could be a plugged vent on the fuel cap, but likely is a varnish problem in the carburetor or a stiff fuel pump diaphragm in the carb. Husqvarna chain saw 55 idles high even when idle screw is backed completely off. So the 2125 it starts no problem but high reving with Rev the engine. The three carburetor adjusting screws are located on the clutch side of all Stihl . If the saw is stalling when you pull the throttle trigger or it doesn't reach its full power, adjust the high-speed (H) screw. The adjustment screws on the chainsaws are low speed and high speed. The letters on the screws represent High (H), Low (L) and Idle (T). The low air supply to the engine during the gas intake to the engine can . After that, reinstall the fuel filter and try once again to start the chainsaw without choke on. The concern is with the gaskets. The most common solution when your Poulan chainsaw stalls when it gets some gas is that the spark arrestor is clogged. Stihl MS880 runs at high idle then dies. Drained float bowl and it looked like liquid had separated- like the Seafoam had stratified. The poulan 2125 was running perfectly about 2 months ago. I would think that perhaps the saw idles fine when cold (fast idle) then once warmed up it has a over rich carb setting causing the stalling issue. Step 2: Take the bowl out and clean it: Remove the bowl nut and then the bowl from the carburetor. Cbeck the air filter by removing the top cover and unscrewing the filter; wash it with soap and water or replace it if it is very dirty. Run the engine for about 10 seconds. If it roars to life, but then falters and shuts off, that's a problem often caused by the idle. That will likely take care of it. When I pull the trigger, it revs up and the blades move, then it bogs out in 10 seconds or less. Trophy Points: 857. or how long you cut prior to letting off the throttle and the saw stalling out . And so on. . If the spark is normal . The chainsaw chain should move after . If it's never had a kit put in the carb, I would do that and clean it up in the process. One of the reasons why the chainsaw does not develop speed when you press the gas, but instead stall, is a carburetor malfunction. My Stihl MS290 starts fine and runs at full throttle but it won't idle anymore and dies as soon as the trigger is released. Outdoor Gasoline and Electric Powered Equipment and Small Engines - chainsaw starts but when I use throttle it dies. After warming up the engine at full speed for 10 seconds, turn screw H 1/4 turn counterclockwise. Clean the Air Filter If it is still not working, then you have to work on the fuel hose. I would think that perhaps the saw idles fine when cold (fast idle) then once warmed up it has a over rich carb setting causing the stalling issue. Cleaned it up, cleaned the carb and started experimenting with the High Low and Idle screws. As is the case with just about anything, it can wear over time. Thread . Chainsaws are among the most efficient power tools around. Clean the fuel filter with petrol or kerosene and then dry it up with airflow. Thus, it helps the engine to relieve some torque and saves fuel/electricity. First of all, you need to check the muffler, and, in case of contamination, clean it from exhaust tar deposits. Start the chain saw and allow the engine to warm for five minutes. The air supply is a crucial thing in any internal combustion engine and a little unbalanced in the air supply due to internal and external factors can result in form of engine bogging down. Turn the screw with the 'L' stamp clockwise with a screwdriver until the screw stops. Stale fuel and its residues are typically found in the bowl. Common Chainsaw Problems Solved. See more ideas about Chainsaw, Chainsaw repair, Chainsaw sharpener. No spark on the spark plug electrodes. Now start the chainsaw and let the engine idle for two to three minutes. However, if this kind of connection works correctly, but the spark is still missing, then the ignition unit (electronic) is the cause. Finally, if the chainsaw stalls out and dies when it's working under a load, that's usually an idle problem as well. The procedure works like this and I would start with the 'low' screw setting. Click to see full answer. There are many chainsaw air leak symptoms, and some of them come from fuel issues. If not, find out what is wrong, or you'll blow it up. 1. In terms of its structure, the saw was a fairly simple tool. The spark arrestor in a chainsaw is a small screen that keeps the engine from producing sparks. It's typical for fuel starvation. Turn the idle screw, now exposed from the protective rubber coating, in order to adjust the idle. Turn the "L" screw clockwise until the screw seats with the screwdriver. The T screw needs to be located next. Husqvarna sells the largest range of chainsaws on the market. Bad fuel hose may cause this. I used my Stihl ms260 last weekend and worked great. Remember, when your Poulan chainsaw runs only with choke on, it surely . You will find a Low and High adjustment screw. Gas left unused and stagnating in the saw's carburetor, and the fuel line will partially evaporate. 2 hours later Starts clean then in 30 seconds is back to only running on full choke and dying with throttle. The chainsaw stalls at idle speed: many owners of this tool face such a problem. Normal starting routine - prime, choke, pull about 3 times til it fires a little, then push choke off, pull a few more times till it starts. How do you adjust the idle on a Husqvarna 41 chainsaw?