$99.95. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. $75.00. Quoting Removed, click Modern View to see Don't put water in the saw-ever. The exhaust is black but no build up. I'm also going to double check it has the correct resistor type spark plug. Then Google "decarb". You can unclog the carburetor if the clog is minor. Is the spark plug the correct one for the saw? I have a MS250 that has come up on compression since new. Make sure it fits snug. Free shipping. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. A 50CC engine needs 150 PSI compression. Friction is usually the cause of a rope failing to draw when it should. The compression limit should also be doubled if the engine capacity is 100 CC. Reddit and its partners use cookies and similar technologies to provide you with a better experience. We got rid of both of those useless things . That is the nature of a 250. I was given (estate) a small McCulloch chain saw and it started and ran great. If A two cycle engine gets flooded BADLY, oil can separate from the gas mix, accumulate in the crankcase and creates an hydrostatc lock. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. You're familiar with how to start a stihl yes? The extra effort to pull the saw is probably due to carbon build up on the piston crown and combustion chamber. How to Reprogram a Chamberlain Garage Door Opener, How to Program a Universal Garage Door Opener, Toro Lawnmower Troubleshooting & How To Guide, Bostitch Nail Gun Troubleshooting & How to Guide. I hook up a drill to the nut on the clutch and start hard starting saws that way . Once you identify the cause of high compression, you can repair that affected part or find a new replacement for it to make it work smoothly. If you regularly use the chainsaw, then there might be the possibility that your starter spring breaks off. Even with new spark plugs in, incorrectly removing and installing the spark plugs can prevent the engine from starting. Disengage the chain brake, turn on the ignition switch and install the new spark plug into the rubber connector. }, As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. An engine is fit on the rear side of a chainsaw. Carboned rings will decrease not increase compression. If it is not physically damaged, clean it with clean gasoline and a rag. $49.99. It is thus highly recommended that you drain the fuel from your chainsaw if it still has any old gasoline left in it. "author": { You are misunderstanding WHY water is put into carboned up engines. How Much Compression Should a Chainsaw Have. Compression is measured by using a simple screw-in gauge. Ensure the chain fits snugly inside of the bar and the teeth that keep it in place are not worn down too low. 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. A flooded engine is when there is too much gas in the combustion chamber, usually due to repeatedly starting the chainsaw using the recoil system without the engine starting. "height": 57 I usual only choke my MS250 for one pull and no longer have the flooding issue. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. With the choke engaged, pull the starting rope several times again, and the chain saw should start on the third pull. My husky 266xp has been that away from newjust pull over slow for 2 or 3 times and then try cranking.. You are misunderstanding WHY water is put into carboned up engines. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. Get you some Sea Foam at the local auto parts store. "interactionType": "https://schema.org/CommentAction", When it comes to compression values, those between 90 and 110 psi are deemed to be acceptable. Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. 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?? Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. That is a high compression saw, pull the rope slowly until you feel resistance then give it a short quick pull. I got it going. Apparently gas would seep int crankcase and over several months of setting gas would evaporate leaving oil behind and first time it was pulled would suck oil into the cylinder. This Indoor Fly Traps: 5 Things You Didn't Know About Indoor Fly Traps. Other than damaged parts, using the choke position to start a warm saw often causes a flooded engine. Register today and take advantage of membership benefits. Sounds like it was broken in "right", show the guy how to start it and tell him to be happy. Then, use a wire brush to remove all the carbon build-up from the cylinder and piston. So, replacing the ignition rope is a better option to keep everything working smoothly without any damage. Sparkplug was correct but I think it was a little flooded. Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. If you notice the treads are worn, which prevents the device from pumping, replace it with a new one. Loosen the nuts holding the clutch cover and disconnect the chain shroud and remove the oil plate. I believe it was flooded, but I didn't think that little bit of fuel would make it that hard to pull but I guess so since it can't compress! I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. A faulty spark plug will have carbon, dirt, and oil blocking the insulator nose, preventing it from firing consistently. Although this is often true, it is not always the case. If the rails are shallow, you need to replace them. All it needs is a few inches missing and it will pull too hard like the compression is too high. 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. after that I'd be looking at crank bearings. The other reason might be the use of the wrong type of oil for the climate. If any of these components are worn or broken, the chain saw wont start even with fuel. I love to write about chainsaw for homeowners and professionals. Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. That is what was told to me by the area distributor technician Check for side play in the crankshaft. The chain oil will keep the chain lubricated, keep off dirt and allow smooth movement. I'm an arborist by profession & a blogger by passion. Turn the idle speed clockwise until the saw idles and chain turns, and then make a one-fourth counterclockwise turn. Ok folks, I'm stumped. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Likewise, low compression in the engine will be slow and retarding and it is a warning sign of leakage in your engine. Check the chainsaws fuel if you have not used the tool for a while. Check the tension 2. We have explained the most effective way to unflood a chainsaw engine below. Hold the tip of the blade and adjust the tension of the chain correctly. It was easier to pull after I cleaned it up, but still tough. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. "datePublished": "2017-08-17", Remove the spark plugs and the e-clips attached to the sprocket on the engine shaft. If you refuel your chainsaw and it still won,t start, below are some of the possible causes and solutions that will get the chainsaw functioning again. ", If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . If you experience low compression, pull the muffler and check the piston and cylinder for, Read More How Much Compression Should a Chainsaw HaveContinue, The possible reasons can be the battery not being charged, properly connected, or dead. The vibration of the tool during use can run some fasteners loose, preventing it from starting again. You are misunderstanding WHY water is put into carboned up engines. or very unlikely but happened to me on an 041 make sure the crank hasn't shifted and started to bind. Carboned rings will decrease not increase compression. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. Register today and take advantage of membership benefits. The Stihl chainsaw comes with a sturdy body, strong teeth, and a smooth rotating bar to help you cut through trees, ice, and even concrete with ease and precision. 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. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. So, If you feel too much compression while pulling a chainsaw, the possible reasons might be as below. There is no idle when I release the trigger. Press J to jump to the feed. Continue with Recommended Cookies. It would give you rusted bearings. It uncoils, tightens the spring, engages the clutch to start the engine. Wipe off any flammable fluid from the metal surface of the engine with a clean rag. Remove the right side cover, bar, and chain. Oct 7, 2019 / Minimum compression for a Stihl 2 cycle #3 the actual numbers will vary from one tool to another Getting accurate numbers without special tools is quite difficult because of the small volumes. It's from not pulling hard enough. The switch might be damaged or the motor is burned out. OEM GOOD USED STIHL 048AV CHAINSAW SHORT BLOCK ENGINE 120 PSI COMPRESSION. no, afraid I don't have equipment to test. Would not be afraid to do it to a 4, 6, or V-8. If that doesnt work, try gently tapping on the side of the bulb with a screwdriver or other tool. Its just that its nearly impossible to pull. The chainsaw has grooves all around the outer edge of the guide bar, and the chain has teeth that run within the bar rail to keep the chain in place and moving straight. People sometimes try to cut down a tree that is too big for their chainsaw. If it has damaged parts, replace it with a carburetor kit that fits your chainsaw model. Then Google decarb . If it is hard to pull, then check how the spring is performing. Each chainsaw has a different level of compression. Over time, soot from the engine clogs up the spark arrestor causing the chainsaw to stall. It takes a Bosch WSR6F or NGK BPMR7A. Don't know what to do at this point. First thing I'd check is the pull start assy. 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. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Temperature Of The Engine A heavy-duty engine gets hot faster and works better than a cold engine. Has someone invented a new kind of two stroke motor? I luv my 064. Take off the muffler or the carb to get access. I bought an old beater 621 Jonsered once that had very high compression, got it running well and sold it, made some money on it! Whether you are a beginner or a professional woodworker, knowing how to fix your chainsaw will save you time and money seeking help from a service center. The following have been addressed. Check the chain tension and adjust it if it is too loose or tight. If the starter spring is keep working correctly, it will retract the ignition rope. A chainsaw Battery blinking red is one of the most frustrating things a woodcutter can, Read More How To Fix Chainsaw Battery Charger Blinking Red?Continue, The standard compression reading required for most 2-cycle chainsaw is around 100-110 psi to start. When your Stihl chainsaw doesnt start after changing the spark plug and fuel, some common problems to look for can help diagnose the source of the issue. As a result, normal compression settings will change based on the kind of chainsaw machine you are using. "@type":"DiscussionForumPosting", Remove the air filter cover and then slide off the rubber spark plug connector from the spark plug. 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?? Make sure the crank taper is clean and the flywheel taper also. I bought it used around 1978. It is best to put a new plug in after clearing. There might be a small stone or thing that is stuck inside the starter and causes the rope not to retract. Your ignition rope must be intact properly with the pulley to work correctly. Reassemble the chainsaw, refill the fuel tank, crank the engine and check for oil along the bar. Generally the minimum is 110 lbs. It would give you rusted bearings. The choke position is the fourth setting on the master control lever. Remove the entire carburetor and clean it. A chainsaw is going to be exposed to oxidation over time, but you can at least limit the process by storing your chainsaw well. I think that's what happened, although I didn't think such a small amount could do it. Also, remove the muffler and check for carbon buildup. 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. When there is no air for the spark to ignite, the chainsaw will start and then die after a short while. Cleaned air filters and both were very dirty. As a result of using bad fuel or leaving fuel in the chainsaw for a long time, the fuel evaporates and leaves behind a sticky substance that accumulates and clogged the carburetor. "@context":"https://schema.org", No it wouldn't go straight to crankcase because you would spray a light mist through air intake with hot engine and let it run for a while after doing it.You might want to do it with screen removed from muffler. This is because each machine is made differently and has various needs. Stihl recommends using 89 octane gasoline without ethanol, and the gas should not contain more than 10% ethanol. I think that's what I'd do. Every chainsaw needs to have some compression to ensure that it operates well. Stihl 024 - Sherlock Holmes issue - help needed here. All it needs is a few inches missing and it will pull too hard like the compression is too high. The first step is to remove the cover that covers the spark plug on your chainsaw. Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. NelsGarage will share the knowledge Ive gathered about different tools and give you tips to accomplish your DIY projects faster. A compression gauge is used to measure the compression of a chainsaw which works similarly to the tire gauge. Afterward, the beginning rope is pulled repeatedly until the gauge comes to a full stop on its own. 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