The choke position is the fourth setting on the master control lever. When you are doing a cold start, push the choke lever to the warm start when the engine starts to run. I got it started. "url": "https://www.yesterdaystractors.com/graphics/smllogo.png", lol. Make sure it's greased and the bushings are good. 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. Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. Mar 22, 2017. A clogged carburetor wont allow fuel into the engine, preventing it from starting. 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. The engine creates a vacuum pressure inside it. That is what was told to me by the area distributor technician Check for side play in the crankshaft. If the coil is faulty, there will be no spark to start the engine and run the chainsaw. The exhaust side of the piston is a warm gold. Continue with Recommended Cookies. Without proper compression, the engine will not be able to suck and use the fuel for combustion. 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. A chainsaw is going to be exposed to oxidation over time, but you can at least limit the process by storing your chainsaw well. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. #1. Welcome! First, remove the spark plug from the chainsaw. The Stihl chainsaw uses a four-position lever ignition system called the master control lever. It is harmful to your machine to use old fuel. Wipe off any flammable fluid from the metal surface of the engine with a clean rag. "@type": "ImageObject", Over time, soot from the engine clogs up the spark arrestor causing the chainsaw to stall. 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. That model is extremely easy to flood. So, replacing the ignition rope is a better option to keep everything working smoothly without any damage. You can use a ratchet to do the task. A drastic and frankly silly thing to do though . It very often kicks back and pulls the starter rope back in. Try taking it out, Then holding the trigger while you pull fast. Check for any cracks and damages and replace if necessary. Locate the tension adjustment screws to the side of the chainsaw guide bar. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. "description":"Discussion of Chainsaw has too much compression in the Tool Talk forum followed by comments. If the chainsaw engine dies when you release the throttle, turn the low-speed screw with a screwdriver clockwise until it stops and then turns it counterclockwise once. I would suspect the timing is too early. Why is the Garage Door Opener Light Not Working? No compression when pulling start rope. Are you sure the starter rope isn't a little too short? The purpose of a choke in a chainsaw is to make cold starting more effortless, but if you do not use it properly. If it has to do with small engines, it's welcome here. If any part of a carburetor has issues, the right amount of fuel/air mixture wont pump into the chamber, therefore, preventing the engine from starting. First thing I'd check is the pull start assy. I would never put water in it! I hope you understand the problems why your chainsaw is hard to pull. Sounds flooded, or maybe wrong sparkplug? "interactionStatistic": { "@type":"DiscussionForumPosting", It would give you rusted bearings. It runs good after I get it started. If you suspect a compression issue, seek professional help as compression repairs can be complicated. Don't put water into the 2 stroke. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. I hook up a drill to the nut on the clutch and start hard starting saws that way . The chain clutch might be, Read More Cordless Chainsaw Wont StartContinue, The most common reason is simply the wrong battery. That is what was told to me by the area distributor technician. Choke cannot be used even when engine cold, or flooding occurs. 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. Greenworks Commercial GS181 82V 18-inch Chainsaw: 50cc gas equivalent power with a stock 18-inch bar and chain ( starting at $349) Make sure it's greased and the bushings are good. I tried draining the crankcase with the saw upside . Repair or replace the damaged part 2. Compression is measured by using a simple screw-in gauge. Change in temperatures and dirt will cause clogging anywhere the oil passes, and this can prevent the oil from spread all across the bar. 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 Youre familiar with how to start a stihl yes? It was easier to pull after I cleaned it up, but still tough. The chain oil will keep the chain lubricated, keep off dirt and allow smooth movement. If oil is in there it is what makes the engine feel like it is almost locked up. Unscrew the spark plug using a ratchet and screw the compression gauge in its place. Remove the entire carburetor and clean it. The second thing, Read More Stihl Chainsaw Charger Not WorkingContinue, Your email address will not be published. }, I have had the cylinder off. Don't know what to do at this point. Every chainsaw needs to have some compression to ensure that it operates well. The consent submitted will only be used for data processing originating from this website. It may not display this or other websites correctly. } Stihl 024 - Sherlock Holmes issue - help needed here. in the. 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. Other than that, you should also use the correct spark plugs for your chainsaw. Loosen the nuts and bolts clockwise and then pull out the oil pump gently. { And some will have more. By getting your pool ready for the winter, you can make sure it will be ready to use in the spring. If the chainsaw is too little compression, it may start easily but will not run smoothly. It runs good after I get it started. Even with new spark plugs in, incorrectly removing and installing the spark plugs can prevent the engine from starting. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. You will notice the compression less. A lot of variables might contribute to excessive compression while using a chainsaw. The carburetor is a significant part of the chainsaw. If oil is in there it is what makes the engine feel like it is almost locked up. 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 sprocket and the washer. Unscrew the clutch assembly on top of the oil pump. 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. Indoor fly traps are an effective way to keep insects away from your home. If the chainsaw is too much compression, it may be difficult to start. I've been working on a Stihl 026 chainsaw that John found, and it is very hard to crank. 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 exhaust is black but no build up. If cleaning does not help release oil onto the bar, the pump may be damaged and require replacing. I have a MS250 that has come up on compression since new. Check the spark plug of the chain saw if the engine is not starting at all. 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. After initial pull on rope (which feels like vapor lock on cylinder), saw will start on second or third pull. }. Not sure it would accomplish anything on a 2-stroke chain saw engine. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. A 250 has a fair amount of compression for a smaller saw but not that bad. Stihl 251 chainsaw. Once youve done that, reassemble the chainsaw, which should work properly again. My /Sthil 034 is very difficult to start. "@type": "Person", Afterward, the beginning rope is pulled repeatedly until the gauge comes to a full stop on its own. If that is true, I'd suspect that the timing is off and why it's ripping the cord from your hand. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. 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. Your email address will not be published. MS250 start compression relief stopped working. When it comes to compression values, those between 90 and 110 psi are deemed to be acceptable. Check the tension 2. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. In addition, you should check the muffler and piston while youre at this point. Guido Quoting Removed, click Modern View to see What?? Detailed, well-researched, and accurate home and garden information presented in an understandable format is our primary goal. Quoting Removed, click Modern View to see What?? I'm hearing thats just the nature of the beast. 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. 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. Turn the engine to get under the piston and blow the crankcase out. In a similar vein, if the wrong kind of oil is used, the compression may be increased. Use an adjustable wrench to loosen the two nuts on both sides of the chainsaw. I bought 2 032 Stihl saws at auction that pulled very hard. or Best . If the chainsaw is too much compression, it may be difficult to start. Admitted Woodaholic. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. The saw is about 2 years old, light use. 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. "author": { Once the 250 is running, its fine. 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. Reddit and its partners use cookies and similar technologies to provide you with a better experience. There might be a small stone or thing that is stuck inside the starter and causes the rope not to retract. I went with a meteor piston/cylinder set. 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. Take off the muffler or the carb to get access. Quoting Removed, click Modern View to see Don't put water in the saw-ever. Versions MS 260, Bar length 37cm, RSC It is significantly tougher to pull over than an 024 or the new 241. Consequently, operating this chainsaw becomes a really difficult chore to do. My one and only MS250 was a kicker to start it but that was the only problem. 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. The end of the tester must protrude exact the same volume into the cylinder as the spark plug or the reading will be wrong. I would suggest clearing the cylinder by pulling the rope with the plug out. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. Would not be afraid to do it to a 4, 6, or V-8. Any ideas? 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. water will not dissolve carbon; it is far too hard to be effected. 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. 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. 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. in the cylinder overnight because the rings are cerboned up? It takes a Bosch WSR6F or NGK BPMR7A. If it is the right sparkplug and not flooded, I would maybe buy a different saw with easy start. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V. Normally it's not a problem but if it was already difficult to pull it could be. The ignition coil transmits electricity to the spark plug to create a spark that ignites the engine. This increased distance will cause the chain to keep coming out of the guiding bar with the vibrating saw. It is usual for the chainsaw chains to come off with continued use, but there is usually an underlying cause when its too repetitive. Also take the spark plug out and do the same. Block the spark plugs hole by putting a nylon rope to prevent the piston from moving. Disconnect the spark plug from the engine and inspect if it is damaged, eroded, or dirty. It had a compression release, and it started and ran well. You need to pull the exhaust to check that. Do that to the starter side when you're looking at the starter assy. 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. When you start the chainsaw, it triggers the worm drive to engage the oiler to send oil through a port that releases onto the bar. Wipe off lubricant and grime from the bar with a clean rag. Turn off the choke by pressing the control lever to activate the fast idle. We and our partners use cookies to Store and/or access information on a device. A chainsaw with no spark will shut down suddenly or not start at all. I'm an arborist by profession & a blogger by passion. Now, how much compression the engine of a chainsaw needs depends upon its motor capacity and temperature. Remove the spark plugs and the e-clips attached to the sprocket on the engine shaft. Replace the fuel filters instead of cleaning them as they are pretty affordable and easy to install too. 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. Low pressure, 20 to 30 pounds is all you need. Press J to jump to the feed. The saw runs and starts great. 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. Sometimes the spring stops working correctly due to overuse and becomes brittle. let it idle over lunch, just made sure to not go too long between filling it with gas, while running of course. To fix this problem, turn off the chain saw and let it sit for about 30 minutes to allow the excess gas to evaporate. Check the chain tension and adjust it if it is too loose or tight. 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. Reassemble the chainsaw, refill the fuel tank, crank the engine and check for oil along the bar. Make sure there is oil in the engine. Register today and take advantage of membership benefits. 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. I;ve read somewhere to put water? Try blowing the crankcase out with air. Posted December 27, 2017. 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! 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. Dont substitute it with. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V. My chainsaw has gotten very hard to pull the rope. The key on the flywheel is in place and not sheered. Every time you fuel the chainsaw, you should make sure to drain the old fuel first to avoid contaminating the new fuel. Any help out thereEGBinOR Get you some Sea Foam at the local auto parts store. Check for side play in the crankshaft. You need to pull the exhaust to check that. I would suspect the timing is too early. Check the choke of the chainsaws engine and make sure it is completely closed. I would suspect the timing is too early. John Deere and its logos are the registered trademarks of the John Deere Corporation. I've done it to high hour Kohler engines many times. 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. Pull trigger and set full choke. Similarly, a 4-stroke engine needs 2 times more compression than a 2-stroke engine, around 180-210 PSI. I hook up a drill to the nut on the clutch and start hard starting saws that way . Not sure I would do it to a saw, but the engine is running at rather high rpm when the water is sprayed into the carb air inlet. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. What are the numbers on your sparkplug? All it needs is a few inches missing and it will pull too hard like the compression is too high. Currently I live in Austin, United States. Didnt somehow get straight oil in the cylinder did you? 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. Subsequent starts are just as hard. Create an account to follow your favorite communities and start taking part in conversations. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Additionally, most spark plugs come pre-gapped. On a 2 stroke the water would go into the crank case first and pool up. I would never put water in it! pulls with little resistance, similar to my farm boss. Check the saws exterior for loose bolts, nuts, and screws and tighten them with an adjustable wrench or screwdriver. High compression in chainsaws is a dangerous problem that can lead to serious injuries. The other reason might be the use of the wrong type of oil for the climate. 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.. Loosen the nuts holding the clutch cover and disconnect the chain shroud and remove the oil plate. Then Google decarb . You may also want to go ahead and replace the plug. Hello D beatty, Here is a link for two stroke engine air cycle, Guido. The carburetor sucks fuel from the tank, mixes it with the right amount of air, and pushes the mixture into the combustion chamber. We got rid of both of those useless things . }, "dateModified": "2017-08-17", 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. 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. No carbon on top or on roof of cylinder. "headline":"Chainsaw has too much compression", Pour starting fluid into the carburetor and crank the engine several times. If the chainsaw still wont start, it is defective and requires a replacement. I can probably find one with at most 65 PSI. 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.