stihl chainsaw too much compression

If you could start an engine with the choke closed and not turn off the choke on time, you will end up flooding the engine with too much gas. So, replacing the ignition rope is a better option to keep everything working smoothly without any damage. Here is a link for two stroke engine air cycle. You're familiar with how to start a stihl yes? Remove the right side cover, bar, and chain. Move the selector lever up one position immediately or the saw will flood on the very next pull. Hello. Are you sure the starter rope isn't a little too short? If you suspect a compression issue, seek professional help as compression repairs can be complicated. If A two cycle engine gets flooded BADLY, oil can separate from the gas mix, accumulate in the crankcase and creates an hydrostatc lock. Every chainsaw requires a different compression level according to its built-up and model number. Fine adjust everything and both saws start Normal now. The vibration of the tool during use can run some fasteners loose, preventing it from starting again. If you recently refueled your Stihl chainsaw, stale gas can be a reason why it wont start. Has someone invented a new kind of two stroke motor? First, remove the cylinder and piston from the chainsaw. Rinse the filter and allow it to air dry before reinstalling it. If it is not physically damaged, clean it with clean gasoline and a rag. It is possible however to flood a two stroke which can cause the plug to fowl. You can unclog the carburetor if the clog is minor. Always change the spark plug after 100 operating hours of the chainsaw to avoid engine problems. Trying to rotate the chain while a huge piece of wood is . 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. You can follow the steps on how to troubleshoot and revive it when it wont start. It's supposed to warm up later this week so I'll be able to do some more on this chain saw. Remove The Chainsaw's Spark Plug Set The Pressure Test Gauge Tug On The Chainsaw's Starter Rope Reset The Chainsaw's Spark Plug Do The Thumb Test Remove The Spark Plug Place Your Thumb Over The Hole Tug On Your Chainsaw's Starter Rope Problems Caused By Too Little Or Too Much Compression Low pressure in a chainsaw High compression in a chainsaw I changed to synthitic. "logo": { 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. If it is the right sparkplug and not flooded, I would maybe buy a different saw with easy start. Pull the starter rope until you hear the first sign of it firing with a small burp. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. I missed the "no carbon". Check the spark plug of the chain saw if the engine is not starting at all. If oil is in there it is what makes the engine feel like it is almost locked up. 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 That would be quite the trick to get the oil to separate out of the gas, LOL. What ratio mix is he using? Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. } water will not dissolve carbon; it is far too hard to be effected. 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. 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. I would never put water in it! 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. The carburetor sucks fuel from the tank, mixes it with the right amount of air, and pushes the mixture into the combustion chamber. I would suspect the timing is too early. Dont substitute it with. JavaScript is disabled. If cleaning does not help release oil onto the bar, the pump may be damaged and require replacing. 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 the spark plug is working correctly and you have good fuel, there still has to be enough fuel in the combustion chamber for the engine to start correctly. Because of an absence of lubrication, the chain saw system becomes brittle, resulting in excessive compression of the chain saw mechanism. "height": 57 When the air that reaches the chain saw's engine is insufficient, it becomes prone to overheating. I went with a meteor piston/cylinder set. I got it started. No carbon on top or on roof of cylinder. Replaced the chain and did some serious cutting and was so pleased. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . Small Engine Technician Too much carbon will do that, check the piston top and combustion chamber. The first step is to remove the cover that covers the spark plug on your chainsaw. Now, how much compression the engine of a chainsaw needs depends upon its motor capacity and temperature. I;ve read somewhere to put water? 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. I;ve read somewhere to put water? 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. You should also make sure the new gas you use is appropriate for the chainsaw. After that, using a ratchet, remove the spark plug from the engine. "headline":"Chainsaw has too much compression", Most of the time, the chainsaw cord became hard to pull because of the Starter Housing. Check the saws exterior for loose bolts, nuts, and screws and tighten them with an adjustable wrench or screwdriver. However, if I push downward on the trigger button, it slows down to. It's also possible the piston or cylinder are scored or carboned up. It was easier to pull after I cleaned it up, but still tough. I've been working on a Stihl 026 chainsaw that John found, and it is very hard to crank. 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. "height": 57 Remove the air filter cover and then slide off the rubber spark plug connector from the spark plug. Pull the starter rope and look for a blue spark between the electrode of the spark plug. Locate the spark plug from the top of the engine underneath the chain brake handle. 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. We will explain the causes of high compression and how you can quickly fix it to make it run smoothly. But the saw just has a rubber piece on the top shroud with a slotted nut that just fastens it to a stud on the cylinder head, where the valve should be. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. As long as I can get it going.. I think that's what I'd do. First thing I'd check is the pull start assy. If the rails are shallow, you need to replace them. Every chainsaw engine has a different capacity depending upon its motor power. Your email address will not be published. The exhaust side of the piston is a warm gold. }. Although this is often true, it is not always the case. It's from not pulling hard enough. What worked with my MS440 kicking problem should also work with that one. pulls with little resistance, similar to my farm boss. Get you some Sea Foam at the local auto parts store. Just wondering what your opinions are of the lowest compression you can run a Stihl MS250 at. High compression in chainsaws is a dangerous problem that can lead to serious injuries. Recognised as a leading saw in the forestry industry, it is available in guide bar lengths 13"/32cm to 18"/45cm. Posted December 27, 2017. Every time you fuel the chainsaw, you should make sure to drain the old fuel first to avoid contaminating the new fuel. Does the saw have a compression release? Make sure there is oil in the engine. SPONSORED. Pull the starter rope until you hear the first sign of it firing with a small burp. Thanks! Pull the rope until it starts. This can lead to serious injuries, including cuts and amputations. 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. 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. It is thus highly recommended that you drain the fuel from your chainsaw if it still has any old gasoline left in it. Press question mark to learn the rest of the keyboard shortcuts. The excess gas can be cleared simply by removing the plug and operating the starter a few times. For 503552201 Cylinder Compression Plug Package Include: 3 x Cylinder Plug Cylinder Compression Plug Fine adjust everything and both saws start Normal now. Modern View Forum powered by phpBB 2001, 2005 phpBB Group. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. Its just that its nearly impossible to pull. Take off the muffler or the carb to get access. Low pressure, 20 to 30 pounds is all you need. A chainsaw with no spark will shut down suddenly or not start at all. Choke cannot be used even when engine cold, or flooding occurs. The manual for this model, and the parts breakdown, show a compression release valve. Im Nelson, a DIY enthusiast with a bottomless can-do attitude. Check the chainsaws fuel if you have not used the tool for a while. You need to pull the exhaust to check that. Follow the steps below on how to fix a flooded chainsaw engine. Would not be afraid to do it to a 4, 6, or V-8. It's also going to be wise to try to put the chainsaw somewhere that isn't exposed to constant sunlight since that can be a contributing factor to the oxidation. Mar 22, 2017. It runs good after I get it started. Spark plugs that are not functioning properly are another probable cause of excessive compression. Quoting Removed, click Modern View to see Don't put water in the saw-ever. I used to have a Homelite that would do that if I left gas in it. Then Google decarb . The carburetor is a significant part of the chainsaw. My one and only MS250 was a kicker to start it but that was the only problem. "@type": "Person", How big a fella are ya? "url": "https://www.yesterdaystractors.com/graphics/smllogo.png", 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. Do that to the starter side when you're looking at the starter assy. Make sure it's greased and the bushings are good. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V. If the chainsaw is too little compression, it may start easily but will not run smoothly. Carboned rings will decrease not increase compression. Take off the muffler or the carb to get access. Too much hot or cold engine does not work or even start to produce vacuum pressure inside engine. I agree the saw runs great, but when your helping old men with ideas of their own its hard to say I wish I had 190 pounds of compression. You have an option to either pull off the starter and clean it or look for an ideal replacement for your starter house. in the cylinder overnight because the rings are cerboned up? }, The choke should be closed during a cold start to limit the air and increase the fuel in the engine to keep it running while it warms up. We describe all the possible issues and also suggest the solutions to fix them too. Not sure it would accomplish anything on a 2-stroke chain saw engine. If the spark plug is too corroded or the electrode is faulty, it cannot create an electrical current to start the system. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . Pull trigger and set full choke. Try it, it may just do the trick! 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. You can check the compression by pulling the spark plug out and holding it in your hand. 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. You are using an out of date browser. I hook up a drill to the nut on the clutch and start hard starting saws that way . Thanks. 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. If your chainsaw doesnt automatically turn it off or you forget, the engine cuts off immediately. Stihl 251 chainsaw. Check for side play in the crankshaft. Press question mark to learn the rest of the keyboard shortcuts. He checked.it clearly says that in the OP. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. Indoor fly traps are an effective way to keep insects away from your home. Your chainsaws compressive strength is measured with the use of a screw-in gauge. It would give you rusted bearings. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. I used to have a Homelite that would do that if I left gas in it. Stihl MS290 MS390 MS310 Chainsaw Has Oil Tank Engine Housing Assembly OEM/ Bin G . It may not display this or other websites correctly. ProTip: You can use a small air compressor to blow air through the air filter and get rid of the loose dust before proceeding to clean it further. If the coil is faulty, there will be no spark to start the engine and run the chainsaw. 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. 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'm hearing thats just the nature of the beast. I get it going now and its easier but its still a bear. "interactionType": "https://schema.org/CommentAction", I've done it to high hour Kohler engines many times. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. A faulty spark plug will have carbon, dirt, and oil blocking the insulator nose, preventing it from firing consistently. I think you'll like it. The early 064, 044, 066 came with a red master control. For a better experience, please enable JavaScript in your browser before proceeding. Therefore, most people will wonder why the chainsaw has too much compression. It takes a Bosch WSR6F or NGK BPMR7A. Use recommedend chain oil lubricant. Once it's removed, you can place a gauge on the place of the spark plug. OEM GOOD USED STIHL 048AV CHAINSAW SHORT BLOCK ENGINE 120 PSI COMPRESSION. The excess gas can be cleared simply by removing the plug and operating the starter a few times. Replace the spark plug with a new identical. Remove the sprocket and the washer. I got it going. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. What usually happens is that the guide bar gets stuck in the tree and they keep running the engine while trying to force the bar out of the tree somehow. The following have been addressed. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. The key on the flywheel is in place and not sheered. Check the choke of the chainsaws engine and make sure it is completely closed. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. 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. Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. You will notice the compression less. "dateModified": "2017-08-17", If it does maybe it is plugged. JavaScript is disabled. That is the nature of a 250. Low pressure, 20 to 30 pounds is all you need. 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. Oct 24, 2011 / Chainsaw excessive compression #1 . While rope attached to a pulley, the further connection of the pulley is with springs and pawl to make sure the pulley is tensioned and helps in retracting and spinning. We got rid of both of those useless things . Wipe off any dirt and debris and check for any signs of damages. Compression is measured by using a simple screw-in gauge. Make sure you have a replacement spark plug on hand in case the problem recurs in the future. It very often kicks back and pulls the starter rope back in. "width": 200, Youre familiar with how to start a stihl yes? Soaking in water will do nothing but rust things up . The chain clutch might be, Read More Cordless Chainsaw Wont StartContinue, The most common reason is simply the wrong battery. My first chain saw was an old Homelite EZ with a blue metal case and a 20" bar. To ensure correct functioning and to prevent excessive compression, you might have to repair worn-out parts with new ones. I think that's what happened, although I didn't think such a small amount could do it. 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. Don't put water into the 2 stroke. However, you still have to confirm the size of the gap before installing. If it has to do with small engines, it's welcome here. "@type": "ImageObject", Also check the air filters and make sure they are clean. On a 2 stroke the water would go into the crank case first and pool up. Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. At this point, the battery will reset,, Read More How To Reset Echo 58-Volt Battery ChargerContinue, The chainsaw battery charger is constantly blinking red, even after charging for a long time!!! Would not be afraid to do it to a 4, 6, or V-8. Consequently, operating this chainsaw becomes a really difficult chore to do. 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. Typically, several reasons cause too much compression in a chainsaw and these include but are not limited to: Old contaminated chainsaw fuel Chainsaw Starter rope issues Faulty spark plugs Chainsaw Carbon buildup Insufficient Chainsaw Oil Old and contaminated fuel Move the selector lever up one position immediately or the saw will flood on the very next pull. How does it feel with the spark plug removed? Usually, this happens when you use a chainsaw after a very long time or by wear and tear of the rope. If the chainsaw wont stay running when the engine is idle, adjust the carburetor. Didnt somehow get straight oil in the cylinder did you? Obviously, the motor, which has a huge capacity, will require more compression. Over time, soot from the engine clogs up the spark arrestor causing the chainsaw to stall. You are using an out of date browser. Required fields are marked *. I bought 2 032 Stihl saws at auction that pulled very hard. 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?? Remove the spark plugs and the e-clips attached to the sprocket on the engine shaft. Don't put water into the 2 stroke. As the chain moves over the bar, it spreads the oil across the moving parts to reduce friction and heat. Friction is usually the cause of a rope failing to draw when it should. Another big issue that causes too much high compression is the lack of oil in the starter system. Uninstall the spark arrestor and unblock it using a brush, but you can also replace it for efficiency. John Deere and its logos are the registered trademarks of the John Deere Corporation. 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. 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! It is harmful to your machine to use old fuel. "name": "Yesterday's Tractor Co.", I hope my epic guides will help you to choose,buy and maintain chainsaw. I would never put water in it! On a 2 stroke the water would go into the crank case first and pool up. Replace the fuel filters instead of cleaning them as they are pretty affordable and easy to install too. You can clean and mildly clogged carburetor but if it is too severe, replace it with one compatible with your chainsaw model. The ideal pressure range of the Stihl chainsaw is between 90 and 110 psi. Compression gauges are not always accurate and different engines will provide different results. I luv my 064. Help, can't pull start Stihl MS250 chainsaw, too much compression. Gas with ethanol also burns hotter than gasoline which can cause the engine to overheat and burn the plug electrodes. Therefore, it does not need any compression rate 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. Continue with Recommended Cookies. When there is no air for the spark to ignite, the chainsaw will start and then die after a short while. stihl ms290 farm boss; By Ron Cook December 27, 2017 in General Chat. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. Blup throttle to bring it down to idle. A hot engine also requires more compression to convert furl into energy as compared to the colder one. We're all about fixing small engines, from carburetor rebuilds, to crankshaft machining. 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. You will notice the compression less. 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. To fix this problem, turn off the chain saw and let it sit for about 30 minutes to allow the excess gas to evaporate. $75.00. The saw runs and starts great. I've done it to high hour Kohler engines many times. I have had the cylinder off. water will not dissolve carbon; it is far too hard to be effected. Can anyone make a suggestion. Afterward, the beginning rope is pulled repeatedly until the gauge comes to a full stop on its own. Remove the entire carburetor and clean it. Similarly, a 4-stroke engine needs 2 times more compression than a 2-stroke engine, around 180-210 PSI. 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. 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. #1. In this case fixing or repairing is required or worst replacing the engine all at once. of compression. Chainsaw Parts. 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. Winterizing a pool is an important step in maintaining the longevity and health of your pool. Thus far, you have learned how to diagnose most problems with the Stihl chainsaw and how to fix the issues. This is because your oil is not rated to get to work at a low temperature. everything is harder in a tree, not a conclusive test. Cleaned air filters and both were very dirty. Could your gauge be off a little? Check the tension 2. If it is hard to pull, then check how the spring is performing. Wash the dirty filter with a non-abrasive detergent and water. Cleaned air filters and both were very dirty. idle. It would give you rusted bearings. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. "mainEntityOfPage": { Lift the bars nose and tighten the nuts on the sidebar to secure the sidebar and guide bar in place. water will not dissolve carbon; it is far too hard to be effected. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. 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. If you notice the treads are worn, which prevents the device from pumping, replace it with a new one. To clean it, drain the fuel, spray some carburetor cleaner and loosen the residue with a small brush. Looks like a saw without base gasket, and too little squish my 250 did the same thing,had to start it with no choke.Take the plug out,crank it the motor and see how much gas spews from the cylinder.Mine would blow out way to much.I had to adjust the metering lever in the carb,no problems after that.

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