An excessive amount of compression in your chainsaws starting rope could also be indicated by the beginning rope failing to draw. This may sometimes jam your chainsaws rings, causing it to become inoperable. . Also take the spark plug out and do the same. The recoil starter in a chainsaw is a start mechanism that allows you to pull the rope. 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. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. To fix this problem, turn off the chain saw and let it sit for about 30 minutes to allow the excess gas to evaporate. Clean any mildly dirty parts and replace all the damaged parts. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. I've done it to high hour Kohler engines many times. "logo": { Compression gauges are not always accurate and different engines will provide different results. First thing I'd check is the pull start assy. I;ve read somewhere to put water? Being in the cutting services for more than 10 years, I know a thing or two about chainsaw. The Pulley compartment plays a massive role in retracting the ignition rope. $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 If the chainsaw still wont start, it is defective and requires a replacement. The chain oil will keep the chain lubricated, keep off dirt and allow smooth movement. $75.00. If so, show him how to start it on the ground with his foot in it or with the rear handle between his thighs. Indoor fly traps are an effective way to keep insects away from your home. Similarly, a 4-stroke engine needs 2 times more compression than a 2-stroke engine, around 180-210 PSI. 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. It runs good after I get it started. Do that to the starter side when you're looking at the starter assy. Pull trigger and set full choke. It runs good after I get it started. Fine adjust everything and both saws start Normal now. If the chainsaw wont stay running when the engine is idle, adjust the carburetor. Even though it was purchased "brand new" I'm not so sure. Carboned rings will decrease not increase compression. Activate the chain brake and then place the chainsaw on a flat, leveled surface. In addition, you should check the muffler and piston while youre at this point. If you still have questions regarding high chainsaw compression, you can discuss them in the comments. It would give you rusted bearings. 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. I think that's what I'd do. It's from not pulling hard enough. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. Remove the filter, engine control lever and Stihl carburetor. The carburetor is a significant part of the chainsaw. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. Stihl 291 chainsaw too much compression Check the compression of the engine. The compression limit should also be doubled if the engine capacity is 100 CC. I've seen a 20psi drop with the wrong type of gauge to be pretty common. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. "dateModified": "2017-08-17", pulls with little resistance, similar to my farm boss. 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. "text": "My chainsaw has gotten very hard to pull the rope. Make sure it's greased and the bushings are good. 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. Gas with ethanol also burns hotter than gasoline which can cause the engine to overheat and burn the plug electrodes. Pull the starter rope and look for a blue spark between the electrode of the spark plug. after that I'd be looking at crank bearings. { I've done it to high hour Kohler engines many times. Ensure the chain fits snugly inside of the bar and the teeth that keep it in place are not worn down too low. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . This article will help you fix the most commonly reported problems of a Stihl chainsaw. The Stihl chainsaw uses a four-position lever ignition system called the master control lever. Start new topic; Recommended Posts. First, remove the spark plug from the chainsaw. Make sure the crank taper is clean and the flywheel taper also. Some of the contributing reasons include a full tank of oil, carbon buildup on the exhaust system, and malfunctioning spark plugs. Read More Chainsaw Primer Bulb Temporary FixContinue, Pull out your battery from the chainsaw, and press the battery button sustainably for a minimum of 5 seconds before you release it. of compression. However, this will vary by model and compression readings alone are not enough to determine the condition of the engine. Are you sure the starter rope isn't a little too short? Guido Quoting Removed, click Modern View to see What?? The early 064, 044, 066 came with a red master control. 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! This is because your oil is not rated to get to work at a low temperature. He checked.it clearly says that in the OP. Mar 24, 2019. No compression when pulling start rope. It runs good after I get it started. 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. "@type":"DiscussionForumPosting", We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Then Google decarb . To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. 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. "interactionType": "https://schema.org/CommentAction", Didnt somehow get straight oil in the cylinder did you? The carburetor sucks fuel from the tank, mixes it with the right amount of air, and pushes the mixture into the combustion chamber. Starting fluid will make the fuel more combustible and makes the process of clearing out the combustion chamber much quicker. I hook up a drill to the nut on the clutch and start hard starting saws that way . Chainsaws are very powerful tools, and if theyre not properly maintained, they can easily overcompress the chain, which can cause it to break. However, the compression also has a limitation because a very high or very low compression will cause problems and prevent your chainsaw from operating efficiently. link to Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. This could be understood by reading the further explanation below. 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 bought it used around 1978. 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. A chainsaw with no spark will shut down suddenly or not start at all. 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. Create an account to follow your favorite communities and start taking part in conversations. The engine creates a vacuum pressure inside it. You should also make sure the new gas you use is appropriate for the chainsaw. A clogged carburetor wont allow fuel into the engine, preventing it from starting. JavaScript is disabled. It had a compression release, and it started and ran well. Press J to jump to the feed. When this pressure, or compression, is too low or high, the chainsaw . Uninstall the spark arrestor and unblock it using a brush, but you can also replace it for efficiency. In a similar vein, if the wrong kind of oil is used, the compression may be increased. 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. Pull the rope until it starts. 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 chain clutch might be, Read More Cordless Chainsaw Wont StartContinue, The most common reason is simply the wrong battery. "author": { Yes I tried that last time and it did help some. 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. Runs well, except it. I would never put water in it! Dont substitute it with. I think that's what I'd do. 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. 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 would suspect the timing is too early. 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. Get you some Sea Foam at the local auto parts store. check the cylinder & piston for carbon build-up, how much compression Does the chainsaw Engine need, How To Reset Echo 58-Volt Battery Charger. I would suspect the timing is too early. If the air filter is too clogged, you should replace it. 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. Remove the air filter, wash it with detergent and water and scrub off the dirt with a brush. Take off the muffler or the carb to get access. You can clean and mildly clogged carburetor but if it is too severe, replace it with one compatible with your chainsaw model. I would never put water in it! Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Additionally, most spark plugs come pre-gapped. It will be apparent if it is, but usually a scored saw won't run good, if at all. }, } 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. Get it ported and it brings it to another level. A clear sign that you may have a chainsaw engine is when you smell gas while starting it. "userInteractionCount": 23 I got it started. 3 9 9 comments Best Add a Comment Revolutionary-Act469 2 yr. ago Doesn't pull at all or just hard to pull. Step 1: Prepare the chainsaw Remove the spark plug from the chainsaw. I bought 2 032 Stihl saws at auction that pulled very hard. "@type": "InteractionCounter", 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. It is like there is too much compression. The following have been addressed. Turn the engine to get under the piston and blow the crankcase out. 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. Don't put water into the 2 stroke. 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.. or Best Offer. Its just that its nearly impossible to pull. This compression converts fuel (any source) into the potential energy in the engine to start it. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. Posted December 27, 2017. You can check the compression by pulling the spark plug out and holding it in your hand. read more Vince O. Your chainsaws compressive strength is measured with the use of a screw-in gauge. 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. Now, how much compression the engine of a chainsaw needs depends upon its motor capacity and temperature. A chainsaw engine generates this compression through the explosion of the fuel in the combustion chamber and the movement of the crankcase. So, in our suggestion, one of the first things to check while feeling high compression is the starter spring. Being new carb, wasn't looking that direction educate a non mechanic. I usual only choke my MS250 for one pull and no longer have the flooding issue. Try it, it may just do the trick! Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. 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. So, replacing the ignition rope is a better option to keep everything working smoothly without any damage. Below we have discussed the most common reasons why your chainsaw wont idle and the best way to fix it. ", 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. Obviously, the motor, which has a huge capacity, will require more compression. A reddit for all operators of chainsaws to post experience with tools, pictures of their new saws and old workhorses and any maintenance tips. 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! . Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. As far as compression, you can usually tell by how the saw pulls when starting it. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. I have a MS250 that has come up on compression since new. Loosen the nuts holding the clutch cover and disconnect the chain shroud and remove the oil plate. A chainsaw is going to be exposed to oxidation over time, but you can at least limit the process by storing your chainsaw well. Ron Cook. i have a ms 250. In other words, the problem is in the trigger itself, not a. carb adjustment screw. Would not be afraid to do it to a 4, 6, or V-8. Try blowing the crankcase out with air. 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. When there is too much fuel, it will not ignite, and the engine wont start. Check the spark plug of the chain saw if the engine is not starting at all. Of all the Stihl saws, the MS250 is the toughest to start in relation to it's size. "@type": "Person", I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. Also check the air filters and make sure they are clean. Check the saws exterior for loose bolts, nuts, and screws and tighten them with an adjustable wrench or screwdriver. What are the numbers on your sparkplug? Use an adjustable wrench to loosen the two nuts on both sides of the chainsaw. no, afraid I don't have equipment to test. An example of data being processed may be a unique identifier stored in a cookie. Therefore, it does not need any compression rate to start. To inspect the guide bar, disassemble the chain cover, chain and bar. 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. A cold engine will need the compression of 50-100 PSI whereas a hot engine will require compression above 150 PSI. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. Has someone invented a new kind of two stroke motor? 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. SPONSORED. Reassemble the chainsaw, refill the fuel tank, crank the engine and check for oil along the bar. Turn off the choke by pressing the control lever to activate the fast idle. Take off the muffler or the carb to get access. Locate the tension adjustment screws to the side of the chainsaw guide bar. I've done it to high hour Kohler engines many times. Soaking in water will do nothing but rust things up . "width": 200, 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. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. If a chainsaw has a 2 stroke engine, then the maximum compression it requires is 110-130 PSI. Create an account to follow your favorite communities and start taking part in conversations. let it idle over lunch, just made sure to not go too long between filling it with gas, while running of course. 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. It may not display this or other websites correctly. By getting your pool ready for the winter, you can make sure it will be ready to use in the spring. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. lol. As long as I can get it going.. 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. Use a screw wrench to loosen the nuts on the guide bar side panel to give you room to adjust the chain. Wipe off any flammable fluid from the metal surface of the engine with a clean rag. "mainEntityOfPage": { You never try to get it to run with the choke on. John Deere and its logos are the registered trademarks of the John Deere Corporation. If this does not fix the issue, it may be necessary to replace the whole starting rope system with another one. People sometimes try to cut down a tree that is too big for their chainsaw. "image": { When it comes to compression values, those between 90 and 110 psi are deemed to be acceptable. If any of these components are worn or broken, the chain saw wont start even with fuel. The chainsaw motor engine capacity can range from 30CC and 50CC to 150 CC. A drastic and frankly silly thing to do though . 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. Quoting Removed, click Modern View to see What?? This increased distance will cause the chain to keep coming out of the guiding bar with the vibrating saw. Pull trigger and set full choke. Low pressure, 20 to 30 pounds is all you need. "@id":"https://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=toolt&th=435118", Carbon build-up in cylinder & piston, bad needle bearing, overused starter spring, oil in the starter system, old or bad fuel, etc can cause too much compression in Chainsaws. Keep in mind that good maintenance and storage will reduce breakdowns and maintain your tools performance throughout its lifetime. Suitable Replacement Stihl MS 250 C Compression Release Parts I used to have a Homelite that would do that if I left gas in it. If your chainsaw doesnt automatically turn it off or you forget, the engine cuts off immediately. Subsequent starts are just as hard. Fine adjust everything and both saws start Normal now. 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'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. Would have to remove spark plug and rinse cylinder with gas to be able to start. 24" is what I've got on mine, but it can handle a bigger bar. Try blowing the crankcase out with air. If the coil is faulty, there will be no spark to start the engine and run the chainsaw. The starter assembly often fails to rotate due to a weak connection between the pulley and the ignition rope. It is possible however to flood a two stroke which can cause the plug to fowl. "width": 200, Quoting Removed, click Modern View to see Don't put water in the saw-ever. I was given (estate) a small McCulloch chain saw and it started and ran great. You can unclog the carburetor if the clog is minor. I get it going now and its easier but its still a bear. Stihl recommends using 89 octane gasoline without ethanol, and the gas should not contain more than 10% ethanol. Flooding usually happens due to an underlying issue: a bad spark plug, bad gas, or a faulty carburetor. 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. "url": "https://www.yesterdaystractors.com/graphics/smllogo.png", Stihl is a leading manufacturer of chainsaws and other handheld outdoor and landscaping power tools. The second thing, Read More Stihl Chainsaw Charger Not WorkingContinue, Your email address will not be published. Check for any cracks and damages and replace if necessary. Confirm the spark plug gap, check and adjust with a feeler gauge or gaping tool. 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 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 most cases, a buildup of carbon under the rings presses the rings against the cylinder, culminating in compression of the cylinder. Most fuels nowadays are a blend of ethanol which attracts moisture and speeds up the rotting process. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. As the guide bar wears down with use, the bar heel- the part of the bar nearest to the drive sprocket- also wears down, which increases the distance the chain travels as the bar grooves become less effective. Final step: removing the old spark plug and installing the new one. If the chainsaw is too little compression, it may start easily but will not run smoothly. 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. 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. Would not be afraid to do it to a 4, 6, or V-8. The choke position is the fourth setting on the master control lever. It will be apparent if it is, but usually a scored saw won't run good, if at all. That is the nature of a 250. If you do not replace the starter spring on time, it will cause you to replace the whole starter assembly. Greenworks Commercial GS181 82V 18-inch Chainsaw: 50cc gas equivalent power with a stock 18-inch bar and chain ( starting at $349) I got it going. You need to pull the exhaust to check that. Check the chain oiler and ensure it is functional. Also take the spark plug out and do the same. Locate the spark plug from the top of the engine underneath the chain brake handle. Oct 24, 2011 / Chainsaw excessive compression #1 .
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