Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. Also try removing the spark plug and see how pull starter works, just trying to see if it could be binding in the recoil/starter assy or not. "width": 200, Convenient, durable and robust with minimum weight, the STIHL MS 260 can come with a number of optional features to make the job even easier. When you start your chainsaw, the crankshaft spins, creating vacuum pressure on the carburetor, pulling the gas from the tank and into the combustion chamber where it mixes with air and ignites. So, replacing the ignition rope is a better option to keep everything working smoothly without any damage. It is harmful to your machine to use old fuel. #1. "image": { To test the recoil starter, remove it and reposition the spring. Mar 22, 2017. Guido Hello EGBinOR, If A two cycle engine gets flooded BADLY, oil can separate from the gas mix, accumulate in the crankcase and creates an hydrostatc lock. It will be apparent if it is, but usually a scored saw won't run good, if at all. Advanced arborist chainsaw with a top handle and STIHL M-Tronic technology. More information can be found on this page. What are the numbers on your sparkplug? The engine must be up to operating temperature, spray a light stream of water into the engine carb air inlet and the cold water shocks the hot carbon and the carbon flakes off and blows out the exhaust pipe. If you still want to try and get carbon out of the saw either take it apart and clean it or use something along the lines of sea foam. I changed to synthitic. When the fuel starts to turn stale, it gums up and clogs the carburetor just as it would in an unused lawnmower. anthonyg_ma Original Author 16 years ago Canguy, thnks for the tips! The engine must be up to operating temperature, spray a light stream of water into the engine carb air inlet and the cold water shocks the hot carbon and the carbon flakes off and blows out the exhaust pipe. Don't put water into the 2 stroke. This may sometimes jam your chainsaws rings, causing it to become inoperable. You may also notice that the chain saw loses power during operation. When this pressure, or compression, is too low or high, the chainsaw . The exhaust side of the piston is a warm gold. I bought 2 032 Stihl saws at auction that pulled very hard. idle. If the chainsaw still wont start, it is defective and requires a replacement. A 50CC engine needs 150 PSI compression. I have a MS250 that has come up on compression since new. A compression gauge is used to measure the compression of a chainsaw which works similarly to the tire gauge. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. Try it, it may just do the trick! NelsGarage will share the knowledge Ive gathered about different tools and give you tips to accomplish your DIY projects faster. Sparkplug was correct but I think it was a little flooded. If the chainsaw is too much compression, it may be difficult to start. Pull the starter rope until you hear the first sign of it firing with a small burp. I've been working on a Stihl 026 chainsaw that John found, and it is very hard to crank. Carboned rings will decrease not increase compression. Could your gauge be off a little? If the chainsaw wont stay running when the engine is idle, adjust the carburetor. Now, how much compression the engine of a chainsaw needs depends upon its motor capacity and temperature. It is thus highly recommended that you drain the fuel from your chainsaw if it still has any old gasoline left in it. My husky 266xp has been that away from newjust pull over slow for 2 or 3 times and then try cranking.. Ivor from uk here and I have a stihl chainsaw and when I am hedge laying or pletching as it is called the saw only runs for 15 or 20 seconds or perhaps 1 minute at the most if there is a big cut to make the spark plug tip builds up with carbon,i use proper 2 stroke oil at a ratio of 25to1 does any pletching or hedge laying go on across the pond?? If you notice the treads are worn, which prevents the device from pumping, replace it with a new one. I bought it used around 1978. It's also possible the piston or cylinder are scored or carboned up. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Because of an absence of lubrication, the chain saw system becomes brittle, resulting in excessive compression of the chain saw mechanism. Make sure the gap is according to the specifications of your chainsaws engine. It will be apparent if it is, but usually a scored saw won't run good, if at all. The correct tension of the chainsaw chain should be slightly loose on the guide bar but tight enough that you cant pull the drive links out of the bar to fix the chain tension issues; follow the steps below. Yes I tried that last time and it did help some. Any ideas? Each chainsaw has a different level of compression. "description":"Discussion of Chainsaw has too much compression in the Tool Talk forum followed by comments. 4 Possible Problems & Solutions Problem 1: Damaged starter housing Solution: 1. If it has to do with small engines, it's welcome here. In other words, the problem is in the trigger itself, not a. carb adjustment screw. }, Admitted Woodaholic. For a better experience, please enable JavaScript in your browser before proceeding. I hook up a drill to the nut on the clutch and start hard starting saws that way . Our aftermarket suitable replacement Stihl MS 250 C chainsaw compression release parts meet or beat OEM specs, offer a considerable cost savings, and usually ship in 24 - 48 hours. The power of the motor of an engine is measured in its capacity. It runs good after I get it started. You can check the compression by pulling the spark plug out and holding it in your hand. "headline":"Chainsaw has too much compression", Pull trigger and set full choke. When the motor warms up after about a minute, turn on the choke position. That would have to be some puddle of oil for a MS250 to have a "bar oil leaking in and causing high compression problems" What kind of Stihl oil regular or synthitc, had an 025 years ago that was a real knuckel buster never checked compression but was using regular Stihl oil. If oil is in there it is what makes the engine feel like it is almost locked up. We have explained the most effective way to unflood a chainsaw engine below. Find the low speed, high speed, and idle speed screws near the carburetor, start the engine and allow it to warm up. Create an account to follow your favorite communities and start taking part in conversations. If that is true, I'd suspect that the timing is off and why it's ripping the cord from your hand. Required fields are marked *. I'm hearing thats just the nature of the beast. Hello D beatty, Here is a link for two stroke engine air cycle, Guido. If you are trying to start your chainsaw in winter and the oil you used for the chainsaw assembly is not suitable for the winter season, you also feel high compression. Hello EGBinOR, I will also add that if you have points, then the wrong gap will alter the point of ignition and can have the same results, Guido. Generally the minimum is 110 lbs. of compression. Try it, it may just do the trick! With the choke engaged, pull the starting rope several times again, and the chain saw should start on the third pull. If you still have questions regarding high chainsaw compression, you can discuss them in the comments. Replace the fuel filters instead of cleaning them as they are pretty affordable and easy to install too. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. Chainsaws are very powerful tools, and if theyre not properly maintained, they can easily overcompress the chain, which can cause it to break. Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. So, If you feel too much compression while pulling a chainsaw, the possible reasons might be as below. You are misunderstanding WHY water is put into carboned up engines. As the guide bar wears down with use, the bar heel- the part of the bar nearest to the drive sprocket- also wears down, which increases the distance the chain travels as the bar grooves become less effective. The other reason might be the use of the wrong type of oil for the climate. It is effortless to check the starter spring; pull the ignition rope. When there is too much fuel, it will not ignite, and the engine wont start. "text": "My chainsaw has gotten very hard to pull the rope. Back to top derwen1959 Long Time User Follow the steps below on how to fix a flooded chainsaw engine. This Indoor Fly Traps: 5 Things You Didn't Know About Indoor Fly Traps. Repair or replace the damaged part 2. If it is the right sparkplug and not flooded, I would maybe buy a different saw with easy start. After all these operations are carried out, it is necessary to once again clean the saw from dirt, then turn it upside down and unscrew the four screws securing the engine to the chainsaw body. Lift the bars nose and tighten the nuts on the sidebar to secure the sidebar and guide bar in place. As a result, normal compression settings will change based on the kind of chainsaw machine you are using. Other than that, you should also use the correct spark plugs for your chainsaw. Not sure it would accomplish anything on a 2-stroke chain saw engine. It runs good after I get it started. Poke the oil feed hole with a 16-gauge wire to unclog it until it slides through the hole smoothly. Does the saw have a compression release? If it is over loading on fuel the carb may need rebuilt to stop the diaphragm from leaking fuel into the cylinder after the saw is shut off. I went with a meteor piston/cylinder set. It prevents the carburetor from allowing too much fuel into the combustion chamber. I'm an arborist by profession & a blogger by passion. I usual only choke my MS250 for one pull and no longer have the flooding issue. Ivor from uk here and I have a stihl chainsaw and when I am hedge laying or pletching as it is called the saw only runs for 15 or 20 seconds or perhaps 1 minute at the most if there is a big cut to make the spark plug tip builds up with carbon,i use proper 2 stroke oil at a ratio of 25to1 does any pletching or hedge laying go on across the pond?? Carboned rings will decrease not increase compression. Carboned rings will decrease not increase compression. This is because your oil is not rated to get to work at a low temperature. External air goes into the engine through the air filter to cool down the chainsaw engine and also mix with the fuel to ignite and run the saw. or very unlikely but happened to me on an 041 make sure the crank hasn't shifted and started to bind. Here is how to troubleshoot a malfunctioning spark plug. I think you'll like it. You can follow the steps on how to troubleshoot and revive it when it wont start. "dateModified": "2017-08-17", I would suggest clearing the cylinder by pulling the rope with the plug out. Wipe off any flammable fluid from the metal surface of the engine with a clean rag. Start new topic; Recommended Posts. In most cases, a buildup of carbon under the rings presses the rings against the cylinder, culminating in compression of the cylinder. It is best to put a new plug in after clearing. Press J to jump to the feed. TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. If your chainsaw doesnt automatically turn it off or you forget, the engine cuts off immediately. Locate the spark plug from the top of the engine underneath the chain brake handle.
