I prime it, start it with choke and let it idle, idles fine, hit the gas past 1/3 throttle it dies like it's fuel starved. A well-maintained chain-saw seldom stalls. Another plausible explanation for the stalling is attributed to the percentage of ethanol in the fuel. I've used new gas/oil mix. I have a ST251C chainsaw typically starts on the first try, that is, pull it once with the choke on then take choke off, pull once and it star … read more After I get it started and it's idling, when I try to press throttle it shuts off. Chainsaw starts and stalls. It provides more play... Yard work is meant to be fun. I can close the needles, and open them too much. Copyright © 1996-2020 AR15.COM LLC. Adjusted the throttle screw and that solved the low power issue. Here is what I did so far. Use a starting fluid and letting it run flushes gunk out of the jets as an alternative to rebuilding the carburetor. Check the air filter to ensure it is not plugged with sawdust or any other material. If the engine starts and stalls during cold start, then you should check the muffler, as well as the contact between the high-voltage wire and the spark plugs. When a chain saw comes in to my shop with that problem, there are two things I look for before anything else. The end result is less supply of fuel for complete combustion to run the saw. Winter proofing your screened porch utilizes the space during the cold season. The carburetor might be clogged. Repair methods. Changing the idle on a chainsaw carburetor isn't complica… Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. This is because the diaphragm gets hard making it hard to crank. jon this is rich's son. As the fuel filter is connected to the fuel line, you will need to pull out a little of the fuel line to expose it. Diaphragm in the carb is hardened from ethanol. Thank you!! did you throw a new spark plug in it ? Then, GENTLY blow some compressed air through it. The saw fires right up cold and idles nice but once I put it into some wood and make a couple cuts it will stall when I let off the throttle. Sometimes, your chainsaw will only idle for about 5 to 10 seconds after you let off the throttle and then it will shut down. Husqvarna 120 Mark II 16 in. If your chainsaw engine starts then instantly stalls, follow our repair and symptom guide to help you identify your problem and the best way to fix it. Over time, the spark arrestor can become clogged with soot. An can of oven cleaner took care of the problem. To cure this, replace the sooty plug with a new one to prevent misfiring when cutting firewood. A sooty plug is an indication of a rich fuel mixture resulting in frequent misfiring. Fwiw it was run dry after every tank. I was able to tune it to run on full throttle (I turned it .5 turn rich). The saw is two years old and in good shape, but has seen significant use the past several weeks. These cookies do not store any personal information. I had a Poulan that did that -  idled fine but would die when rev'ed more than a couple of seconds. Here is how to fix it, whether it is a clogged spark arrestor, bad fuel filter. Check this fuel line to make sure it isn’t cracked or broken, as they can become brittle with age. AR15.COM is the world’s largest firearm community and is a gathering place for firearm enthusiasts of all types. Stihl ST251C Chainsaw Stalls when I depress the throttle. However, if the problem persists you may need to enlist the help of a professional. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. Some of the suggested parts to check are the air filter, spark plug, fuel filter, and fuel lines. Replacement of carburetor is the best option if you have an old chainsaw. Ensure the important plastic parts are removed due to the thinner’s ability to dissolve plastics. Chainsaw stalls when giving it gas? This category only includes cookies that ensures basic functionalities and security features of the website. There is only one basic human right, the right to do as you damn well please. The chainsaw has a smaller engine with a smaller carburetor that does the above-stated good and bad jobs! However out of the box, the saw was unable to reach cutting speed or power and was stalling constantly when full throttle or contacting a log, no matter how slow I took it to max power. I assumed it was out of gas, but it wasn't. You can try removing it and run the saw to see if it helps. Remedy this by adjusting the high-speed screw. When the engine is idling, the throttle plate is nearly closed (the position of the throttle … Sparkplugs are a litmus test to the fuel economy of your chainsaw. A clogged carburetor is often caused by leaving fuel in the chainsaw for a long period of time. I would guess that the diaphragm in the carb is sticking due to sitting dry. Even without an incident of stalling, it is important to carry out regular repairs.