How does it feel with the spark plug removed? If the air filter is too clogged, you should replace it. If the chainsaw still wont start, it is defective and requires a replacement. Pull trigger and set full choke. Are you sure the starter rope isn't a little too short? 1 2 Next J Joe_Power Joined Apr 18, 2013 Messages 651 Location USA - Coast to Coast, Border to Border Jun 2, 2015 #1 I just replaced the cylinder and piston on a stihl 036. 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?? Stihl 251 chainsaw. Finally the fuel will be converted into energy. Normally it's not a problem but if it was already difficult to pull it could be. I would suggest clearing the cylinder by pulling the rope with the plug out. 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. Obviously, the motor, which has a huge capacity, will require more compression. You have an option to either pull off the starter and clean it or look for an ideal replacement for your starter house. You need to pull the exhaust to check that. Poke the oil feed hole with a 16-gauge wire to unclog it until it slides through the hole smoothly. That is what was told to me by the area distributor technician, 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. If it does maybe it is plugged. 1. saw has new carb 2. flywheel has been removed and key inspected. Soaking in water will do nothing but rust things up . You may also want to go ahead and replace the plug. Then Google decarb . Carboned rings will decrease not increase compression. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. I think that's what I'd do. Use a screw wrench to loosen the nuts on the guide bar side panel to give you room to adjust the chain. Pull the starter rope until you hear the first sign of it firing with a small burp. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Turn the brake off. Spark plugs that are not functioning properly are another probable cause of excessive compression. It is possible however to flood a two stroke which can cause the plug to fowl. 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. The chainsaw motor engine capacity can range from 30CC and 50CC to 150 CC. A drastic and frankly silly thing to do though . A chainsaw is going to be exposed to oxidation over time, but you can at least limit the process by storing your chainsaw well. Check the tension 2. If oil is in there it is what makes the engine feel like it is almost locked up. 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. "interactionStatistic": { Has someone invented a new kind of two stroke motor? Let saw run until its warmed up, and go cut wood. If cleaning does not help release oil onto the bar, the pump may be damaged and require replacing. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. Is the spark plug the correct one for the saw? Disengage the chain brake, turn on the ignition switch and install the new spark plug into the rubber connector. Turn the idle speed clockwise until the saw idles and chain turns, and then make a one-fourth counterclockwise turn. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. Stihl recommends using 89 octane gasoline without ethanol, and the gas should not contain more than 10% ethanol. Does the saw have a compression release? All it needs is a few inches missing and it will pull too hard like the compression is too high. Make sure the gap is according to the specifications of your chainsaws engine. When the motor warms up after about a minute, turn on the choke position. Save my name, email, and website in this browser for the next time I comment. I'm an arborist by profession & a blogger by passion. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. When the spark plug is removed, the engine turns Ask an Expert Car Questions Small Engine Troubleshooting JON, Small Engine Technician 2,680 Satisfied Customers Certified Small Engine Technician JON is online now Related Small Engine Questions I've seen a 20psi drop with the wrong type of gauge to be pretty common. I just picked up a well used 025 that runs like a champ and has quite a bit of compression, I have not put a gauge on it but it will pull the starting handle out of my hands if I'm not paying attention. 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. Compression is measured by using a simple screw-in gauge. How Many Amps Does a Garage Door Opener Use? I've done it to high hour Kohler engines many times. 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. Quoting Removed, click Modern View to see Don't put water in the saw-ever. Greenworks Commercial GS181 82V 18-inch Chainsaw: 50cc gas equivalent power with a stock 18-inch bar and chain ( starting at $349) Another big issue that causes too much high compression is the lack of oil in the starter system. The ideal pressure range of the Stihl chainsaw is between 90 and 110 psi. It would give you rusted bearings. For a better experience, please enable JavaScript in your browser before proceeding. A highly compressed engine will not be able to work smoothly because of the too much pressure on engine and you will find it hard to start the engine. Too much carbon will do that, check the piston top and combustion chamber. Cleaned it all up, and had it tuned up. Ensure the wires leading to the On/Off switch are not tangled or in contact with the metal part of the engine if there is no spark. Animated Two Stoke Engine Air Cycle, My husky 266xp has been that away from newjust pull over slow for 2 or 3 times and then try cranking.. My husky 266xp has been that away from newjust pull over slow for 2 or 3 times and then try cranking.. If the chainsaw is too much compression, it may be difficult to start. No compression when pulling start rope read more Expert Stihl ms 180 chain saw, new carb, spark plug, compression stihl ms 180 chain saw, new carb, spark plug, compression 110, new gas, still won't start what next, piston is not scored. If you do not replace the starter spring on time, it will cause you to replace the whole starter assembly. check the cylinder & piston for carbon build-up, how much compression Does the chainsaw Engine need, How To Reset Echo 58-Volt Battery Charger. There might be a small stone or thing that is stuck inside the starter and causes the rope not to retract. Of all the Stihl saws, the MS250 is the toughest to start in relation to it's size. $799.99 CHOOSE AN OPTION Deliver From Store e.g., 123 Your Street, Virginia Beach, VA 12345 Add to Cart Order Online - Pick Up In Store Currently Shopping At: JC Licht Ace Hardware-Bridgeport (773) 523-8888 Change My dealer Features STIHL M-Tronic That is what was told to me by the area distributor technician. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. Didnt somehow get straight oil in the cylinder did you? Uninstall the spark arrestor and unblock it using a brush, but you can also replace it for efficiency. "height": 57 }. If the chainsaw wont stay running when the engine is idle, adjust the carburetor. Once the 250 is running, its fine. Unscrew the clutch assembly on top of the oil pump. 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. 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, (quoted from post at 00:57:42 08/18/17) My chainsaw has gotten very hard to pull the rope. Now it has sat since the last use and I went to start it and it turned over maybe three times and the compression . "name": "Egbinor" 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. The recoil starter in a chainsaw is a start mechanism that allows you to pull the rope. Not sure it would accomplish anything on a 2-stroke chain saw engine. or very unlikely but happened to me on an 041 make sure the crank hasn't shifted and started to bind. The chain oil will keep the chain lubricated, keep off dirt and allow smooth movement. I've got one here with 105-110 compression that I can't get to run and it feels kinda funny when I pull the starter rope, like it has compression with the piston going up and down. 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. It will be apparent if it is, but usually a scored saw won't run good, if at all. Chainsaw Parts. 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. Make sure you have a gauge with a schrader valve right at the tip of the spark plug adapter or you will get a low reading every time. I hook up a drill to the nut on the clutch and start hard starting saws that way . The vibration of the tool during use can run some fasteners loose, preventing it from starting again. Start new topic; Recommended Posts. 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! Some of our partners may process your data as a part of their legitimate business interest without asking for consent. So be sure to keep your chainsaw properly maintained and avoid compression problems. So, replacing the ignition rope is a better option to keep everything working smoothly without any damage. Remove the sprocket and the washer. A clogged carburetor wont allow fuel into the engine, preventing it from starting. Dont substitute it with. If the issue persists after the addition of new fuel to the tank, there may be a fault with the gas pipelines or the fuel filters. 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 are misunderstanding WHY water is put into carboned up engines. However, this will vary by model and compression readings alone are not enough to determine the condition of the engine. That is a high compression saw, pull the rope slowly until you feel resistance then give it a short quick pull. Register today and take advantage of membership benefits. "author": { You're familiar with how to start a stihl yes? 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. Every chainsaw requires a different compression level according to its built-up and model number. Hello. (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 Trying to rotate the chain while a huge piece of wood is . This is because your oil is not rated to get to work at a low temperature. what and or where is the metering lever.? 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. 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. Dust particles in the air mix with the lubricating oil and clog up the air filter, therefore, preventing sufficient air from getting into the engine. Detailed, well-researched, and accurate home and garden information presented in an understandable format is our primary goal. If A two cycle engine gets flooded BADLY, oil can separate from the gas mix, accumulate in the crankcase and creates an hydrostatc lock. To test the recoil starter, remove it and reposition the spring. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. Indoor fly traps are an effective way to keep insects away from your home. in the. You may also notice that the chain saw loses power during operation. It does not take much to increase the compression. 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. Find the low speed, high speed, and idle speed screws near the carburetor, start the engine and allow it to warm up. Yes I tried that last time and it did help some. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. Mar 22, 2017. Afterward, the beginning rope is pulled repeatedly until the gauge comes to a full stop on its own. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. "url": "https://www.yesterdaystractors.com/graphics/smllogo.png", Replace the spark plug with a new identical. #1. The plug should be tight against your thumb. Check for dirty fuel tanks, clogged fuel filters, loose pipes, clogged air filters, and a dirty carburetor, which can all the fuel volume going into the combustion chamber. Stihl MS192T Chainsaw Fuel Oil Tank Engine Housing Assembly OEM. 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. Get you some Sea Foam at the local auto parts store. A clear sign that you may have a chainsaw engine is when you smell gas while starting it. The other cause of your chainsaws high compression could be the stuck ignition rope. 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. When this pressure, or compression, is too low or high, the chainsaw . Hello D beatty, Here is a link for two stroke engine air cycle, Guido. 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. If your chainsaws cylinder and piston have a lot of carbon build-up, it can cause the chainsaw to have high compression. Remove the air filter cover and then slide off the rubber spark plug connector from the spark plug. A cold engine will need the compression of 50-100 PSI whereas a hot engine will require compression above 150 PSI. If your chainsaw doesnt automatically turn it off or you forget, the engine cuts off immediately. Take off the muffler or the carb to get access. Required fields are marked *. I went with a meteor piston/cylinder set. Check if the wires are damaged or broken and replace them if necessary. 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. 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. after that I'd be looking at crank bearings. Stihl chainsaw low compression diagnoses and How To Dave's Small Engines 8.89K subscribers Subscribe 17K views 2 years ago This video shows a Stihl MS310 chainsaw I have apart from low. 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. Most of the time, the chainsaw cord became hard to pull because of the Starter Housing. after that I'd be looking at crank bearings. I think that's what I'd do. Your ignition rope must be intact properly with the pulley to work correctly. It takes a Bosch WSR6F or NGK BPMR7A. Replaced the chain and did some serious cutting and was so pleased. In fact, Stihl thinks so highly of Motomix, that they will double the factory warranty on their Stihl 2-stroke tools if you use it. Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. I would suspect the timing is too early. ", Sometimes, the ignition rope is frayed or stuck inside the starter housing. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. If it is too damaged, you should replace it. Too much hot or cold engine does not work or even start to produce vacuum pressure inside engine. Also check the air filters and make sure they are clean. You can check the compression by pulling the spark plug out and holding it in your hand. A lot of variables might contribute to excessive compression while using a chainsaw. In most cases, a buildup of carbon under the rings presses the rings against the cylinder, culminating in compression of the cylinder. Make sure it's greased and the bushings are good. As a result, normal compression settings will change based on the kind of chainsaw machine you are using. You are misunderstanding WHY water is put into carboned up engines. The switch might be damaged or the motor is burned out. The purpose of a choke in a chainsaw is to make cold starting more effortless, but if you do not use it properly. When there is too much fuel, it will not ignite, and the engine wont start. 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. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. It is usual for the chainsaw chains to come off with continued use, but there is usually an underlying cause when its too repetitive. Press J to jump to the feed. You will notice the compression less. Quoting Removed, click Modern View to see Don't put water in the saw-ever. Small Engine Technician The spark plug is located in the engine and ignites the fuel and air mixture, driving the piston and running the engine. If you regularly use the chainsaw, then there might be the possibility that your starter spring breaks off. Stihl is a leading manufacturer of chainsaws and other handheld outdoor and landscaping power tools. Gas with ethanol also burns hotter than gasoline which can cause the engine to overheat and burn the plug electrodes. }, Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. 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. Insufficient fuel in the system may result in excessive compression. Check for clogged shafts and jets, clogged carburetor, damaged valves, stuck levers, and damaged or warped diaphragms, all of which can interfere with the fueling process. Would not be afraid to do it to a 4, 6, or V-8. Don't put water into the 2 stroke. Remove the spark plug with a spark plug wrench and clean it with a brush to remove carbon scoring and dirt. Sometimes, this might be triggered by another problem that is impacting your system. You can clean and mildly clogged carburetor but if it is too severe, replace it with one compatible with your chainsaw model. The carburetors work in a chainsaw engine allows the right amount of fuel and air mixture into the combustion chamber. Runs well, except it. 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. If you see any unusual movement of spring, then take it in to replace it. } If the coil is faulty, there will be no spark to start the engine and run the chainsaw. Check the spark plug and replace it if needed. } Stihl MS 250 Chain Saw: The pull start will barely move the flywheel. Not sure it would accomplish anything on a 2-stroke chain saw engine. I would never put water in it! It may not display this or other websites correctly. Other than damaged parts, using the choke position to start a warm saw often causes a flooded engine. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. To clean it, drain the fuel, spray some carburetor cleaner and loosen the residue with a small brush. It is effortless to check the starter spring; pull the ignition rope. You can follow the steps on how to troubleshoot and revive it when it wont start. Try taking it out, Then holding the trigger while you pull fast. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. . Step 1: Prepare the chainsaw Remove the spark plug from the chainsaw. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. An engine is fit on the rear side of a chainsaw. Lift the bars nose and tighten the nuts on the sidebar to secure the sidebar and guide bar in place. The flywheel is loose? He checked.it clearly says that in the OP. No carbon on top or on roof of cylinder. Insert the air filter and the spark plug, reconnect the spark plug wire, and close the opening. There is no carbon build up and all looks like new. 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. The Housing is the outer cover of the starter, and if it is damaged, your chainsaw suffers stiffness during a pull. Keep in mind that good maintenance and storage will reduce breakdowns and maintain your tools performance throughout its lifetime. All it needs is a few inches missing and it will pull too hard like the compression is too high. If it is the right sparkplug and not flooded, I would maybe buy a different saw with easy start. Im Nelson, a DIY enthusiast with a bottomless can-do attitude. 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. Take off the muffler or the carb to get access. Modern View Forum powered by phpBB 2001, 2005 phpBB Group. Always change the spark plug after 100 operating hours of the chainsaw to avoid engine problems. How Much Does it Cost to Install a Garage Door Opener? in the cylinder overnight because the rings are cerboned up? }, Unscrew the spark plug wrench using a spark plug from the engine. 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. Winterizing a pool is an important step in maintaining the longevity and health of your pool. Getting these problems resolved is a rather straightforward process. We're all about fixing small engines, from carburetor rebuilds, to crankshaft machining. On a 2 stroke the water would go into the crank case first and pool up. John Deere and its logos are the registered trademarks of the John Deere Corporation. Check the electrode gap of the spark plug and ensure it is 0.02 inches. If you notice the treads are worn, which prevents the device from pumping, replace it with a new one. "userInteractionCount": 23 Several reasons can cause your Stihl chainsaw to bog down when your pull the trigger. or Best Offer. SPONSORED. A large engine has a huge capacity in its motor. Would have to remove spark plug and rinse cylinder with gas to be able to start. This can lead to serious injuries, including cuts and amputations. 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've done it to high hour Kohler engines many times. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. The choke position is the fourth setting on the master control lever. 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. Carboned rings will decrease not increase compression. Pour starting fluid into the carburetor and crank the engine several times. Wipe off any flammable fluid from the metal surface of the engine with a clean rag. In addition, you should check the muffler and piston while youre at this point. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. Open the spark plug hole facing away from you, remove the wire from the spark plug and disconnect the spark plug using a spark plug wrench. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. I can probably find one with at most 65 PSI. . i have a ms 250. The chain clutch might be, Read More Cordless Chainsaw Wont StartContinue, The most common reason is simply the wrong battery. Would not be afraid to do it to a 4, 6, or V-8. 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. To inspect the guide bar, disassemble the chain cover, chain and bar. "datePublished": "2017-08-17", Press J to jump to the feed. Try it, it may just do the trick! It is thus highly recommended that you drain the fuel from your chainsaw if it still has any old gasoline left in it. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Check the choke of the chainsaws engine and make sure it is completely closed. Repair or replace the damaged part 2. Blup throttle to bring it down to idle. I have a MS250 that has come up on compression since new. 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. I have had the cylinder off. Yeah, I must have flooded it as I was working on it.