stihl chainsaw too much compression stihl chainsaw too much compression

You never try to get it to run with the choke on. Not sure it would accomplish anything on a 2-stroke chain saw engine. Create an account to follow your favorite communities and start taking part in conversations. Thus far, you have learned how to diagnose most problems with the Stihl chainsaw and how to fix the issues. Can anyone make a suggestion. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. A drastic and frankly silly thing to do though . I;ve read somewhere to put water? Consequently, operating this chainsaw becomes a really difficult chore to do. What are the numbers on your sparkplug? Don't know what to do at this point. Cleaned it all up, and had it tuned up. Also check the air filters and make sure they are clean. Sometimes, the ignition rope is frayed or stuck inside the starter housing. Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. If it has damaged parts, replace it with a carburetor kit that fits your chainsaw model. idle. Chainsaws are very powerful tools, and if theyre not properly maintained, they can easily overcompress the chain, which can cause it to break. 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. It's an older saw I bought at a garage sale. First thing I'd check is the pull start assy. Ensure the chain fits snugly inside of the bar and the teeth that keep it in place are not worn down too low. "@type": "WebPage", Make sure it is snug but can also move freely by hand. How Many Amps Does a Garage Door Opener Use? pulls with little resistance, similar to my farm boss. Replaced the chain and did some serious cutting and was so pleased. Keep in mind that the stuck ignition rope can also damaged other parts inside the starter assembly. 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. Try blowing the crankcase out with air. Consequently, always use the right oil and make sure that your chain saws starting mechanism is lubricated to prevent excessive compression while starting the saw. TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. If you suspect a compression issue, seek professional help as compression repairs can be complicated. Pull the starter rope until you hear the first sign of it firing with a small burp. A heavy-duty engine gets hot faster and works better than a cold engine. Currently I live in Austin, United States. If the reading is below or above the required range, then your ignition coil requires changing. I have a MS250 that has come up on compression since new. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. $99.95. "headline":"Chainsaw has too much compression", 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! "name": "Egbinor" 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?? As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. Create an account to follow your favorite communities and start taking part in conversations. 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. Sometimes it kicks and the rope pulls right out of my hand. 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. This article will help you fix the most commonly reported problems of a Stihl chainsaw. Remove the entire carburetor and clean it. That is what was told to me by the area distributor technician. The starter assembly often fails to rotate due to a weak connection between the pulley and the ignition rope. 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. 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. JavaScript is disabled. You can follow the steps on how to troubleshoot and revive it when it wont start. Admitted Woodaholic. Then Google decarb . If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . Yeah, I must have flooded it as I was working on it. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. If you find the brake drum moving, you must replace the needle bearing. Would have to remove spark plug and rinse cylinder with gas to be able to start. 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. Wear rubber gloves and hold the rubber plug and spark plug about 1-2cm from the metal surface of the engine unit. Save my name, email, and website in this browser for the next time I comment. Remove the air filter, wash it with detergent and water and scrub off the dirt with a brush. "@type": "Person", 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. Unscrew the clutch assembly on top of the oil pump. I used to have a Homelite that would do that if I left gas in it. Make sure there is oil in the engine. The excess gas can be cleared simply by removing the plug and operating the starter a few times. Wipe off any flammable fluid from the metal surface of the engine with a clean rag. If it looks physically fine after cleaning it and you havent changed it in a few seasons, you should still replace it. Then, use a wire brush to remove all the carbon build-up from the cylinder and piston. We describe all the possible issues and also suggest the solutions to fix them too. You never try to get it to run with the choke on. Pull trigger and set full choke. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Lift the bars nose and tighten the nuts on the sidebar to secure the sidebar and guide bar in place. The Pulley compartment plays a massive role in retracting the ignition rope. (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 Then Google "decarb". "width": 200, I love to write about chainsaw for homeowners and professionals. Low pressure, 20 to 30 pounds is all you need. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. You can check the compression by pulling the spark plug out and holding it in your hand. However, this will vary by model and compression readings alone are not enough to determine the condition of the engine. After initial pull on rope (which feels like vapor lock on cylinder), saw will start on second or third pull. I;ve read somewhere to put water? Poke the oil feed hole with a 16-gauge wire to unclog it until it slides through the hole smoothly. Any ideas? Stihl 024 - Sherlock Holmes issue - help needed here. Pull the starter rope until you hear the first sign of it firing with a small burp. The flywheel is loose? All it needs is a few inches missing and it will pull too hard like the compression is too high. It is a prevalent issue and can be fixed and detected easily without consulting a mechanic. Check the saws exterior for loose bolts, nuts, and screws and tighten them with an adjustable wrench or screwdriver. Finally the fuel will be converted into energy. I have had the cylinder off. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. Other than that, you should also use the correct spark plugs for your chainsaw. 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. 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. It is significantly tougher to pull over than an 024 or the new 241. No compression when pulling start rope. Do that to the starter side when you're looking at the starter assy. I hope my epic guides will help you to choose,buy and maintain chainsaw. Insert the air filter and the spark plug, reconnect the spark plug wire, and close the opening. 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! 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. water will not dissolve carbon; it is far too hard to be effected. I've done it to high hour Kohler engines many times. This compression converts fuel (any source) into the potential energy in the engine to start it. Fine adjust everything and both saws start Normal now. I've done it to high hour Kohler engines many times. 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. Check for broken teeth on the chain and replace them if necessary. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. Most fuels nowadays are a blend of ethanol which attracts moisture and speeds up the rotting process. 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. 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. 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. Also check the air filters and make sure they are clean. It was metering lever. You can prevent the new starter rope from fraying by burning the two ends of the rope. For 503552201 Cylinder Compression Plug Package Include: 3 x Cylinder Plug Cylinder Compression Plug Temperature Of The Engine A heavy-duty engine gets hot faster and works better than a cold engine. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. Most Stihl chainsaws have a resistance of 0.2-3.0 ohm on the primary coil and 5-20 kiloohm on the secondary coil but always confirm the correct reading for your model number. "@type":"DiscussionForumPosting", Step 1: Prepare the chainsaw Remove the spark plug from the chainsaw. 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. 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. Replace with a new starter house Problem 2: Damaged pulley system Solution: 1. water will not dissolve carbon; it is far too hard to be effected. When it comes to power tools, good maintenance, and proper use will maintain the functionality and lifespan of the tool regardless of whether it is an electric miter saw or a gas power chainsaw. You are misunderstanding WHY water is put into carboned up engines. 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. I missed the "no carbon". 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. I usual only choke my MS250 for one pull and no longer have the flooding issue. "datePublished": "2017-08-17", It is best to put a new plug in after clearing. 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. Are you sure the starter rope isn't a little too short? Does the saw have a compression release? You are misunderstanding WHY water is put into carboned up engines. Can also be used with hedge trimmer attachment HS 246. Thanks. You will notice the compression less. "@id":"https://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=toolt&th=435118", 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. "interactionType": "https://schema.org/CommentAction", Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. When the oil pimp or oiler is faulty, it will reduce the chainsaws performance and power. 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. We are compensated for referring traffic and business to Amazon and other companies linked to on this site. When the motor warms up after about a minute, turn on the choke position. You are misunderstanding WHY water is put into carboned up engines. 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. Remove the filter, engine control lever and Stihl carburetor. The spark plug is located in the engine and ignites the fuel and air mixture, driving the piston and running the engine. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. The engine creates a vacuum pressure inside it. I would never put water in it! "name": "Yesterday's Tractor Co.", I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. A chainsaw engine generates this compression through the explosion of the fuel in the combustion chamber and the movement of the crankcase. Even though it was purchased "brand new" I'm not so sure. Don't put water into the 2 stroke. If it is not physically damaged, clean it with clean gasoline and a rag. 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. 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. Cleaned air filters and both were very dirty. 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. Get you some Sea Foam at the local auto parts store. My one and only MS250 was a kicker to start it but that was the only problem. So, in our suggestion, one of the first things to check while feeling high compression is the starter spring. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. 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. First, remove the spark plug from the chainsaw. How To Fix Chainsaw Battery Charger Blinking Red? We got rid of both of those useless things . runs way too fast. So, If you feel too much compression while pulling a chainsaw, the possible reasons might be as below. To fix this problem, turn off the chain saw and let it sit for about 30 minutes to allow the excess gas to evaporate. The ignition system is responsible for igniting the fuel and air mixture to produce energy that powers the chainsaw. As a result, normal compression settings will change based on the kind of chainsaw machine you are using. Get you some Sea Foam at the local auto parts store. Youre familiar with how to start a stihl yes? Locate the spark plug from the top of the engine underneath the chain brake handle. "@type": "ImageObject", Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. It's from not pulling hard enough. Continue with Recommended Cookies. "@type": "Organization", It is like there is too much compression. You may also notice that the chain saw loses power during operation. I changed to synthitic. Do that to the starter side when you're looking at the starter assy. Check the choke of the chainsaws engine and make sure it is completely closed. I got it started. Too much hot or cold engine does not work or even start to produce vacuum pressure inside engine. 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. 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. 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. "author": { It is thus highly recommended that you drain the fuel from your chainsaw if it still has any old gasoline left in it. A very loose chain will cause the blades to come out of the bar, while a very tight chain is also not ideal for the proper functioning of the chainsaw. The plug should be tight against your thumb. Even with new spark plugs in, incorrectly removing and installing the spark plugs can prevent the engine from starting. I have a MS250 that has come up on compression since new. 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. Most of the time, the chainsaw cord became hard to pull because of the Starter Housing. Guido Quoting Removed, click Modern View to see What?? Loosen the nuts and bolts clockwise and then pull out the oil pump gently. My first chain saw was an old Homelite EZ with a blue metal case and a 20" bar. Press J to jump to the feed. I bought 2 032 Stihl saws at auction that pulled very hard. The exhaust side of the piston is a warm gold. If it is hard to pull, then check how the spring is performing. To ensure correct functioning and to prevent excessive compression, you might have to repair worn-out parts with new ones. The Housing is the outer cover of the starter, and if it is damaged, your chainsaw suffers stiffness during a pull. I have a MS250 that has come up on compression since new. Remove the right side cover, bar, and chain. When there is no air for the spark to ignite, the chainsaw will start and then die after a short while. 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! Because of an absence of lubrication, the chain saw system becomes brittle, resulting in excessive compression of the chain saw mechanism. or Best . after that I'd be looking at crank bearings. Also check the air filters and make sure they are clean. As far as compression, you can usually tell by how the saw pulls when starting it. If I drop start it I can pull it through 1 compression stroke. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. 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. I've seen a 20psi drop with the wrong type of gauge to be pretty common. Uninstall the spark arrestor and unblock it using a brush, but you can also replace it for efficiency. This could be understood by reading the further explanation below. Remove the spark plugs and the e-clips attached to the sprocket on the engine shaft. In this case fixing or repairing is required or worst replacing the engine all at once. Ron Cook. The chain clutch might be, Read More Cordless Chainsaw Wont StartContinue, The most common reason is simply the wrong battery. In most cases, a buildup of carbon under the rings presses the rings against the cylinder, culminating in compression of the cylinder. After that, using a ratchet, remove the spark plug from the engine. If you do not replace the starter spring on time, it will cause you to replace the whole starter assembly. $75.00. Try blowing the crankcase out with air. A large engine has a huge capacity in its motor. It's also possible the piston or cylinder are scored or carboned up. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. Get it ported and it brings it to another level. This increased distance will cause the chain to keep coming out of the guiding bar with the vibrating saw. 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.. I would suggest clearing the cylinder by pulling the rope with the plug out. I get it going now and its easier but its still a bear. I've been working on a Stihl 026 chainsaw that John found, and it is very hard to crank. NelsGarage.com All Rights Reserved 2021 Theme: Prefer by, Stihl Chainsaw Troubleshooting & How-to Guide. In addition, you should check the muffler and piston while youre at this point. Would not be afraid to do it to a 4, 6, or V-8. An excessive amount of compression in your chainsaws starting rope could also be indicated by the beginning rope failing to draw. Unscrew the spark plug wrench using a spark plug from the engine. It may not display this or other websites correctly. Carbon buildup is yet another important factor in the increasing compression experienced by chain saws over time. Therefore, it does not need any compression rate to start. The manual for this model, and the parts breakdown, show a compression release valve. 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. Remove the air filter cover and then slide off the rubber spark plug connector from the spark plug. Posted December 27, 2017. 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. If it is too damaged, you should replace it. Check the chain oiler and ensure it is functional. Could your gauge be off a little? Does the saw have a compression release? 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. 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. 24" is what I've got on mine, but it can handle a bigger bar. }. And some will have more. 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. Now, how much compression the engine of a chainsaw needs depends upon its motor capacity and temperature. Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. 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. On a 2 stroke the water would go into the crank case first and pool up. Pull the starter rope and look for a blue spark between the electrode of the spark plug. I hook up a drill to the nut on the clutch and start hard starting saws that way . Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. Would not be afraid to do it to a 4, 6, or V-8. Your ignition rope must be intact properly with the pulley to work correctly. in the, All Rights Reserved. There might be a small stone or thing that is stuck inside the starter and causes the rope not to retract. 4 Possible Problems & Solutions Problem 1: Damaged starter housing Solution: 1. I've done it to high hour Kohler engines many times. That model is extremely easy to flood. A faulty spark plug will have carbon, dirt, and oil blocking the insulator nose, preventing it from firing consistently. I would never put water in it! A problem in the ignition system is likely to be the culprit when the chainsaw doesnt spark. 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. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. 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. Would have to remove spark plug and rinse cylinder with gas to be able to start. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . The carburetors work in a chainsaw engine allows the right amount of fuel and air mixture into the combustion chamber. 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 Check the spark plug and replace it if needed. 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. Stihl MS 250 Chain Saw: The pull start will barely move the flywheel. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. Over time, soot from the engine clogs up the spark arrestor causing the chainsaw to stall. 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. If that doesnt work, try gently tapping on the side of the bulb with a screwdriver or other tool. 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. 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. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. John Deere and its logos are the registered trademarks of the John Deere Corporation. Remove ignition coil and muffler. It is possible however to flood a two stroke which can cause the plug to fowl. Being new carb, wasn't looking that direction educate a non mechanic. The choke position is the fourth setting on the master control lever. 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. Compression gauges are not always accurate and different engines will provide different results. Thanks! If A two cycle engine gets flooded BADLY, oil can separate from the gas mix, accumulate in the crankcase and creates an hydrostatc lock. It is effortless to check the starter spring; pull the ignition rope. I think that's what I'd do. Block the spark plugs hole by putting a nylon rope to prevent the piston from moving. The compression limit should also be doubled if the engine capacity is 100 CC. 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. The power of the motor of an engine is measured in its capacity. Pull the rope until it starts. 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