And some will have more. Carboned rings will decrease not increase compression. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . 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. Starter fluids spray can help in those conditions Before pulling shoulder. You will notice the compression less. It was easier to pull after I cleaned it up, but still tough. Afterward, the beginning rope is pulled repeatedly until the gauge comes to a full stop on its own. Hold the saw firmly to the ground and crank the engine about four to six times to bleed out the fuel from the combustion chamber. If you see any unusual movement of spring, then take it in to replace it. 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. Greenworks Commercial GS181 82V 18-inch Chainsaw: 50cc gas equivalent power with a stock 18-inch bar and chain ( starting at $349) I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. If any part of a carburetor has issues, the right amount of fuel/air mixture wont pump into the chamber, therefore, preventing the engine from starting. You never try to get it to run with the choke on. We will explain the causes of high compression and how you can quickly fix it to make it run smoothly. The starter assembly often fails to rotate due to a weak connection between the pulley and the ignition rope. Would have to remove spark plug and rinse cylinder with gas to be able to start. 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. Neighbor brought me his Stihl MS250 complaining that it tries to pull his arm from socket when starting. Could your gauge be off a little? A problem in the ignition system is likely to be the culprit when the chainsaw doesnt spark. Yes I tried that last time and it did help some. Quoting Removed, click Modern View to see Don't put water in the saw-ever. Use a can of carb cleaner sprayed into the breather/filter assembly. Sometimes the spring stops working correctly due to overuse and becomes brittle. If I drop start it I can pull it through 1 compression stroke. Carboned rings will decrease not increase compression. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. A 50CC engine needs 150 PSI compression. If the compression is too high or too low, the engine wont start. If it is too damaged, you should replace it. I changed to synthitic. 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. Below are the reasons the chain keeps coming loose and how to fix it. Take off the muffler or the carb to get access. 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. You can follow the steps on how to troubleshoot and revive it when it wont start. To ensure that enough air reaches the chain saw's engine, remove the air filter and clean or replace it, depending on the manufacturer's instructions. When this comes to a stop, it will come to a complete stop at a certain number, which is the compression of your chainsaw blade. The spark plug is located in the engine and ignites the fuel and air mixture, driving the piston and running the engine. Runs well, except it. Sounds flooded, or maybe wrong sparkplug? It's supposed to warm up later this week so I'll be able to do some more on this chain saw. You need to pull the exhaust to check that. It prevents the carburetor from allowing too much fuel into the combustion chamber. My name is Chris Ross. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. The compression limit should also be doubled if the engine capacity is 100 CC. link to Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. The other cause of your chainsaws high compression could be the stuck ignition rope. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. I;ve read somewhere to put water? Turn the engine to get under the piston and blow the crankcase out. no, afraid I don't have equipment to test. Thank you for the responses. If any of these components are worn or broken, the chain saw wont start even with fuel. I was given (estate) a small McCulloch chain saw and it started and ran great. The vibration of the tool during use can run some fasteners loose, preventing it from starting again. If it does maybe it is plugged. Therefore, most people will wonder why the chainsaw has too much compression. That is a high compression saw, pull the rope slowly until you feel resistance then give it a short quick pull. Try it, it may just do the trick! When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. Back to top derwen1959 Long Time User 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. Posted December 27, 2017. If not I'm honestly kinda stumped. check the cylinder & piston for carbon build-up, how much compression Does the chainsaw Engine need, How To Reset Echo 58-Volt Battery Charger. Use of this Web site constitutes acceptance of our. Another big issue that causes too much high compression is the lack of oil in the starter system. That is what was told to me by the area distributor technician. I get it going now and its easier but its still a bear. If the chainsaw wont stay running when the engine is idle, adjust the carburetor. what and or where is the metering lever.? "url": "https://www.yesterdaystractors.com/graphics/smllogo.png", Versions MS 260, Bar length 37cm, RSC Why is the Garage Door Opener Light Not Working? The chain clutch might be, Read More Cordless Chainsaw Wont StartContinue, The most common reason is simply the wrong battery. What is the minimum compression for my STIHL chainsaw? I can probably find one with at most 65 PSI. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. Quoting Removed, click Modern View to see Don't put water in the saw-ever. We got rid of both of those useless things . Make sure it's greased and the bushings are good. 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. Its just that its nearly impossible to pull. Likewise, low compression in the engine will be slow and retarding and it is a warning sign of leakage in your engine. First thing I'd check is the pull start assy. When the oil pimp or oiler is faulty, it will reduce the chainsaws performance and power. I think that's what I'd do. Youll need to clean the cylinder and piston to fix this thoroughly. Soaking in water will do nothing but rust things up . 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. No compression when pulling start rope. Check the chain tension and adjust it if it is too loose or tight. If this is the case, you may want to try lubricating the rope to see if it would assist to resolve the difficulties. It's also possible the piston or cylinder are scored or carboned up. Locate the spark plug from the top of the engine underneath the chain brake handle. Create an account to follow your favorite communities and start taking part in conversations. I'll even do the labor for free. Cleaned air filters and both were very dirty. How To Fix Chainsaw Battery Charger Blinking Red? Make sure the gap is according to the specifications of your chainsaws engine. The saw runs and starts great. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. It is like there is too much compression. Try blowing the crankcase out with air. Remove the entire carburetor and clean it. Sometimes, the ignition rope is frayed or stuck inside the starter housing. I love to write about chainsaw for homeowners and professionals. Do that to the starter side when you're looking at the starter assy. "interactionType": "https://schema.org/CommentAction", Choke cannot be used even when engine cold, or flooding occurs. let it idle over lunch, just made sure to not go too long between filling it with gas, while running of course. 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?? You can prevent the new starter rope from fraying by burning the two ends of the rope. Remove the sprocket and the washer. Each chainsaw has a different level of compression. A faulty spark plug will have carbon, dirt, and oil blocking the insulator nose, preventing it from firing consistently. You will notice the compression less. If it is hard to pull, then check how the spring is performing. "publisher": { The Stihl chainsaw is a two-stroke gas-powered tool that uses a substantial amount of compression to pull fuel from the tank, mix it with air and ignite it to produce energy that runs the chainsaw. The lack of oil dries the chainsaw assembly, which causes high compression and becomes very difficult for you to handle the chainsaw. If your saw doesn't have a compression release since like you say its not a pro, then the two things I would check is either the go through recoil assembley with a fine tooth comb. Reddit and its partners use cookies and similar technologies to provide you with a better experience. The ideal pressure range of the Stihl chainsaw is between 90 and 110 psi. I would never put water in it! You are misunderstanding WHY water is put into carboned up engines. Some of the contributing reasons include a full tank of oil, carbon buildup on the exhaust system, and malfunctioning spark plugs. It was metering lever. Pull the recoil off and check for binding Pull rope or starter pawls misaligned. Make sure there is oil in the engine. It is best to put a new plug in after clearing. It runs good after I get it started. When you are doing a cold start, push the choke lever to the warm start when the engine starts to run. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. Pour starting fluid into the carburetor and crank the engine several times. Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. I've done it to high hour Kohler engines many times. When there is too much fuel, it will not ignite, and the engine wont start. $49.99. I would suspect the timing is too early. The end of the tester must protrude exact the same volume into the cylinder as the spark plug or the reading will be wrong. Wear rubber gloves and hold the rubber plug and spark plug about 1-2cm from the metal surface of the engine unit. Would not be afraid to do it to a 4, 6, or V-8. $75.00. It very often kicks back and pulls the starter rope back in. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. I used to have a Homelite that would do that if I left gas in it. "@type": "WebPage", Check the electrode gap of the spark plug and ensure it is 0.02 inches. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Remove ignition coil and muffler. (there is some play when flywheel on shaft (nut not attached) 3. tank and oiler vents are operating 4. exhaust has been removed and spark arresting screen checked (clean) 5. piston/walls checked.. no scarring That is the nature of a 250. Youre familiar with how to start a stihl yes? Refill the chain oil by opening the cap on the chain oil tank, filling up the tank until the level is below the cap threads, and then replace the lid. I've got four other Stihl saws here, an 029, 036Pro, 015L, and an MS200T, only the 36Pro pulls this hard and only if I don't use the decomp button. If it looks physically fine after cleaning it and you havent changed it in a few seasons, you should still replace it. It would give you rusted bearings. If that doesnt work, try gently tapping on the side of the bulb with a screwdriver or other tool. 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. "@id": "https://www.yesterdaystractors.com/" He checked.it clearly says that in the OP. I have a MS250 that has come up on compression since new. A cold engine will need the compression of 50-100 PSI whereas a hot engine will require compression above 150 PSI. You're familiar with how to start a stihl yes? My /Sthil 034 is very difficult to start. Fuel filters trap dirt and contaminants from the fuel to prevent them from damaging the engine. It's possible the timing is off a little but without knowing the make and model of the saw that's just a long shot. Ensure the chain fits snugly inside of the bar and the teeth that keep it in place are not worn down too low. Pull trigger and set full choke. "@type": "ImageObject", A clear sign that you may have a chainsaw engine is when you smell gas while starting it. Turn the idle speed clockwise until the saw idles and chain turns, and then make a one-fourth counterclockwise turn. I hook up a drill to the nut on the clutch and start hard starting saws that way . You have an option to either pull off the starter and clean it or look for an ideal replacement for your starter house. Take off the muffler or the carb to get access. All it needs is a few inches missing and it will pull too hard like the compression is too high. Wipe off any flammable fluid from the metal surface of the engine with a clean rag. Replace with a new starter house Problem 2: Damaged pulley system Solution: 1. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. High compression in chainsaws is a dangerous problem that can lead to serious injuries. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. That is what was told to me by the area distributor technician That is the nature of a 250. A reddit for all operators of chainsaws to post experience with tools, pictures of their new saws and old workhorses and any maintenance tips. So, in our suggestion, one of the first things to check while feeling high compression is the starter spring. Then, use a wire brush to remove all the carbon build-up from the cylinder and piston. Register today and take advantage of membership benefits. It is significantly tougher to pull over than an 024 or the new 241. "text": "My chainsaw has gotten very hard to pull the rope. Typically, several reasons cause too much compression in a chainsaw and these include but are not limited to: Another common cause of chainsaw compression problems is a faulty quantity of old gasoline. This can lead to serious injuries, including cuts and amputations. water will not dissolve carbon; it is far too hard to be effected. Not sure I would do it to a saw, but the engine is running at rather high rpm when the water is sprayed into the carb air inlet. 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. You are using an out of date browser. I got it started. I would never put water in it! When the motor warms up after about a minute, turn on the choke position. Additionally, most spark plugs come pre-gapped. Other Professional Battery-Powered Chainsaws We Recommend: Stihl MSA 220 C-B 36V 16-inch Chainsaw: Solid design and increased power backed by Stihl's dealer network. Have had it into dealer and nothing wrong with it and dealer said that from time to time they see saws come in with nothing wrong with them but have increased compression. Keep in mind that good maintenance and storage will reduce breakdowns and maintain your tools performance throughout its lifetime. The excess gas can be cleared simply by removing the plug and operating the starter a few times. water will not dissolve carbon; it is far too hard to be effected. Every chainsaw requires a different compression level according to its built-up and model number. You never try to get it to run with the choke on. My one and only MS250 was a kicker to start it but that was the only problem. Over time or when using the wrong fuel, the fuel filter becomes too clogged and restricts fuel flow, killing the engine shortly after starting. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright . It is typical for the Stihl chainsaw to develop some issues, and when this happens, some basic troubleshooting will help identify the source of the issue and solution to help it run smoothly. Maybe the piston is hitting it. Gas with ethanol also burns hotter than gasoline which can cause the engine to overheat and burn the plug electrodes. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. Pull the starter rope until you hear the first sign of it firing with a small burp. Normally it's not a problem but if it was already difficult to pull it could be. You are misunderstanding WHY water is put into carboned up engines. "height": 57 The ignition coil transmits electricity to the spark plug to create a spark that ignites the engine. Not sure it would accomplish anything on a 2-stroke chain saw engine. "datePublished": "2017-08-17", Step 1: Prepare the chainsaw Remove the spark plug from the chainsaw. 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. The second thing, Read More Stihl Chainsaw Charger Not WorkingContinue, Your email address will not be published. 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. Replace the fuel filters instead of cleaning them as they are pretty affordable and easy to install too. For the chainsaw to function appropriately, you must maintain the proper amount of tension on the chain. A large engine has a huge capacity in its motor. 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. Block the spark plugs hole by putting a nylon rope to prevent the piston from moving. after that I'd be looking at crank bearings. Pull the starter rope until you hear the first sign of it firing with a small burp. This site is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. They're easy to use and inexpensive, so if you are considering buying one for your home, there are a few quick things you Consumers in the Home and Garden sector turn to us for answers to their nagging questions about various goods and services. Most fuels nowadays are a blend of ethanol which attracts moisture and speeds up the rotting process. Yeah, I must have flooded it as I was working on it. Consequently, operating this chainsaw becomes a really difficult chore to do. Use a brush and cloth to clean and remove any dirt, mud, or debris that can interfere with the controlsclean around the chain brake lever, the air filter housing, and the filter. Compression gauges are not always accurate and different engines will provide different results. Here is a link for two stroke engine air cycle. Use a screw wrench to loosen the nuts on the guide bar side panel to give you room to adjust the chain. The key on the flywheel is in place and not sheered. Im Nelson, a DIY enthusiast with a bottomless can-do attitude. 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. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. A heavy-duty chainsaw requires a large amount of compression, whereas a chainsaw with a smaller engine needs less compression to convert fuel into energy. It is basically the same product as TruFuel (same base synthetic fuel with different synthetic oil) that is sold through Stihl dealers and endorsed for use in all Stihl 2-stroke engines. I bought 2 032 Stihl saws at auction that pulled very hard. It's also possible the piston or cylinder are scored or carboned up. I have had the cylinder off. The carburetors work in a chainsaw engine allows the right amount of fuel and air mixture into the combustion chamber. Free shipping. A hot engine also requires more compression to convert furl into energy as compared to the colder one. idle. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. Once the 250 is running, its fine. Has someone invented a new kind of two stroke motor? Reassemble the chainsaw, refill the fuel tank, crank the engine and check for oil along the bar.