"text": "My chainsaw has gotten very hard to pull the rope. 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. Remove the entire carburetor and clean it. How big a fella are ya? Create an account to follow your favorite communities and start taking part in conversations. Not sure it would accomplish anything on a 2-stroke chain saw engine. "@type": "WebPage", Thus far, you have learned how to diagnose most problems with the Stihl chainsaw and how to fix the issues. If the chainsaw is too much compression, it may be difficult to start. A cold engine will need the compression of 50-100 PSI whereas a hot engine will require compression above 150 PSI. Lift the bars nose and tighten the nuts on the sidebar to secure the sidebar and guide bar in place. 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. 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. 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 used to have a Homelite that would do that if I left gas in it. If oil is in there it is what makes the engine feel like it is almost locked up. 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. Mar 24, 2019. I hook up a drill to the nut on the clutch and start hard starting saws that way . There are sprays (power tune) for removing carbon, but I doubt if that's your problem. Replaced the chain and did some serious cutting and was so pleased. Remove the air filter, wash it with detergent and water and scrub off the dirt with a brush. $20.00 shipping. Didnt somehow get straight oil in the cylinder did you? 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. Would not be afraid to do it to a 4, 6, or V-8. I would suspect the timing is too early. The early 064, 044, 066 came with a red master control. This can lead to serious injuries, including cuts and amputations. A chainsaw is going to be exposed to oxidation over time, but you can at least limit the process by storing your chainsaw well. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. "author": { 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. Once you identify the cause of high compression, you can repair that affected part or find a new replacement for it to make it work smoothly. of compression. Thank you for the responses. I missed the "no 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. A drastic and frankly silly thing to do though . Disconnect the spark plug from the engine and inspect if it is damaged, eroded, or dirty. Hello. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. Register today and take advantage of membership benefits. } Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . link to Indoor Fly Traps: 5 Things You Didn't Know About Indoor Fly Traps. Over time or when using the wrong fuel, the fuel filter becomes too clogged and restricts fuel flow, killing the engine shortly after starting. 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. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright . Below we have discussed the most common reasons why your chainsaw wont idle and the best way to fix it. Some of the contributing reasons include a full tank of oil, carbon buildup on the exhaust system, and malfunctioning spark plugs. Keep in mind that the stuck ignition rope can also damaged other parts inside the starter assembly. i have a ms 250. }, Any ideas? Has someone invented a new kind of two stroke motor? This is because your oil is not rated to get to work at a low temperature. How Many Amps Does a Garage Door Opener Use? Wipe off the excess fuel from the spark plug with a clean rag. Hello D beatty, Here is a link for two stroke engine air cycle, Guido. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Here is how to troubleshoot a malfunctioning spark plug. It is usual for the chainsaw chains to come off with continued use, but there is usually an underlying cause when its too repetitive. 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. You can unclog the carburetor if the clog is minor. Take better care of your chainsaw and perform regular maintenance according to the manufacturers recommendations to prevent any of these problems. Would have to remove spark plug and rinse cylinder with gas to be able to start. Stihl MS290 MS390 MS310 Chainsaw Has Oil Tank Engine Housing Assembly OEM/ Bin G . Sometimes an adapter is needed to make a tight fit. What worked with my MS440 kicking problem should also work with that one. Change in temperatures and dirt will cause clogging anywhere the oil passes, and this can prevent the oil from spread all across the bar. 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. stihl ms290 farm boss; By Ron Cook December 27, 2017 in General Chat. 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. For the chainsaw to function appropriately, you must maintain the proper amount of tension on the chain. 24" is what I've got on mine, but it can handle a bigger bar. 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. It is thus highly recommended that you drain the fuel from your chainsaw if it still has any old gasoline left in it. Once the 250 is running, its fine. When the air that reaches the chain saw's engine is insufficient, it becomes prone to overheating. 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 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! If your chainsaw doesnt automatically turn it off or you forget, the engine cuts off immediately. 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. You can follow the steps on how to troubleshoot and revive it when it wont start. Find the low speed, high speed, and idle speed screws near the carburetor, start the engine and allow it to warm up. 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 starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. 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. If you still have questions regarding high chainsaw compression, you can discuss them in the comments. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. Use a screw wrench to loosen the nuts on the guide bar side panel to give you room to adjust the chain. Pull trigger and set full choke. Therefore, most people will wonder why the chainsaw has too much compression. Trying to rotate the chain while a huge piece of wood is . An engine is fit on the rear side of a chainsaw. 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. The compression limit should also be doubled if the engine capacity is 100 CC. I bought 2 032 Stihl saws at auction that pulled very hard. However, if I push downward on the trigger button, it slows down to. no, afraid I don't have equipment to test. If it does maybe it is plugged. In this case fixing or repairing is required or worst replacing the engine all at once. Small Engine Technician For a better experience, please enable JavaScript in your browser before proceeding. $49.99. "interactionStatistic": { Every chainsaw needs to have some compression to ensure that it operates well. read more Vince O. 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. A clogged carburetor wont allow fuel into the engine, preventing it from starting. Quoting Removed, click Modern View to see What?? The second thing, Read More Stihl Chainsaw Charger Not WorkingContinue, Your email address will not be published. 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. "name": "Yesterday's Tractor Co.", The ignition coil transmits electricity to the spark plug to create a spark that ignites the engine. What is the minimum compression for my STIHL chainsaw? Therefore, it does not need any compression rate to start. Why is the Garage Door Opener Light Not Working? Manage Settings }. Ask him if he's drop-starting it. 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?? Admitted Woodaholic. Soaking in water will do nothing but rust things up . A two-stroke gas-powered chainsaw uses relatively few moving parts. 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. 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. Check the saws exterior for loose bolts, nuts, and screws and tighten them with an adjustable wrench or screwdriver. I bought 2 032 Stihl saws at auction that pulled very hard. Several reasons can cause your Stihl chainsaw to bog down when your pull the trigger. A chainsaw with no spark will shut down suddenly or not start at all. The exhaust side of the piston is a warm gold. Thanks! Likewise, low compression in the engine will be slow and retarding and it is a warning sign of leakage in your engine. I used to have a Homelite that would do that if I left gas in it. OEM GOOD USED STIHL 048AV CHAINSAW SHORT BLOCK ENGINE 120 PSI COMPRESSION. 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 bought an old beater 621 Jonsered once that had very high compression, got it running well and sold it, made some money on it! Don't put water into the 2 stroke. Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. "image": { Repair or replace the damaged part 2. Start new topic; Recommended Posts. I've done it to high hour Kohler engines many times. In addition, you should check the muffler and piston while youre at this point. We will explain the causes of high compression and how you can quickly fix it to make it run smoothly. "headline":"Chainsaw has too much compression", Would have to remove spark plug and rinse cylinder with gas to be able to start. 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! By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. 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. The manual for this model, and the parts breakdown, show a compression release valve. It is best to put a new plug in after clearing. The extra effort to pull the saw is probably due to carbon build up on the piston crown and combustion chamber. Without proper compression, the engine will not be able to suck and use the fuel for combustion. 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.. So, If you feel too much compression while pulling a chainsaw, the possible reasons might be as below. 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. Do that to the starter side when you're looking at the starter assy. If it has to do with small engines, it's welcome here. Subsequent starts are just as hard. The vibration of the tool during use can run some fasteners loose, preventing it from starting again. So, in our suggestion, one of the first things to check while feeling high compression is the starter spring. As the chain moves over the bar, it spreads the oil across the moving parts to reduce friction and heat. Wash the dirty filter with a non-abrasive detergent and water. "datePublished": "2017-08-17", The power of the motor of an engine is measured in its capacity. That is what was told to me by the area distributor technician That is the nature of a 250. or very unlikely but happened to me on an 041 make sure the crank hasn't shifted and started to bind. When the oil pimp or oiler is faulty, it will reduce the chainsaws performance and power. Most of the time, the chainsaw cord became hard to pull because of the Starter Housing. If the chainsaw wont stay running when the engine is idle, adjust the carburetor. Remove the ignition coil, test it using a multimeter or an ignition coil tester, and confirm your chainsaw models resistance specification. }, 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. 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. "name": "Egbinor" This is because each machine is made differently and has various needs. Compression gauges are not always accurate and different engines will provide different results. Don't know what to do at this point. Keep in mind that good maintenance and storage will reduce breakdowns and maintain your tools performance throughout its lifetime. Most times, when the Stihl chainsaw stops working, it is never a complete breakdown. Ensure the wires leading to the On/Off switch are not tangled or in contact with the metal part of the engine if there is no spark. The ignition system is responsible for igniting the fuel and air mixture to produce energy that powers the chainsaw. It's an older saw I bought at a garage sale. First thing I'd check is the pull start assy. Youll need to clean the cylinder and piston to fix this thoroughly. It would give you rusted bearings. An example of data being processed may be a unique identifier stored in a cookie. Greenworks Commercial GS181 82V 18-inch Chainsaw: 50cc gas equivalent power with a stock 18-inch bar and chain ( starting at $349) "@id": "https://www.yesterdaystractors.com/" As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. On a 2 stroke the water would go into the crank case first and pool up. 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. For 503552201 Cylinder Compression Plug Package Include: 3 x Cylinder Plug Cylinder Compression Plug Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. 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 idle. Carboned rings will decrease not increase compression. Replace the spark plug with a new identical. If oil is in there it is what makes the engine feel like it is almost locked up. 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. Try blowing the crankcase out with air. Recognised as a leading saw in the forestry industry, it is available in guide bar lengths 13"/32cm to 18"/45cm. 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. Remove the spark plugs and the e-clips attached to the sprocket on the engine shaft. This increased distance will cause the chain to keep coming out of the guiding bar with the vibrating saw. 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. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. 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! A clear sign that you may have a chainsaw engine is when you smell gas while starting it. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Every chainsaw requires a specific amount of compression if this compression is more or less than the required amount, the engine will not be able to produce energy from the fuel source, and it will be exhausted faster. A 50CC engine needs 150 PSI compression. My /Sthil 034 is very difficult to start. Don't put water into the 2 stroke. Friction is usually the cause of a rope failing to draw when it should. The chain oil will keep the chain lubricated, keep off dirt and allow smooth movement. Remove the right side cover, bar, and chain. The engine creates a vacuum pressure inside it. after that I'd be looking at crank bearings. What are the numbers on your sparkplug? Carboned rings will decrease not increase compression. $99.95. The compression limit should also be doubled if the engine capacity is 100 CC. . 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. You can use a ratchet to do the task. Remove the filter, engine control lever and Stihl carburetor. 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. 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. I have a MS250 that has come up on compression since new. The lack of oil dries the chainsaw assembly, which causes high compression and becomes very difficult for you to handle the chainsaw. Pull trigger and set full choke. It may not display this or other websites correctly. When you are doing a cold start, push the choke lever to the warm start when the engine starts to run. #1. Stihl MS 250 Chain Saw: The pull start will barely move the flywheel. The first step is to remove the cover that covers the spark plug on your chainsaw. All it needs is a few inches missing and it will pull too hard like the compression is too high. If the chainsaw still wont start, it is defective and requires a replacement. If so, show him how to start it on the ground with his foot in it or with the rear handle between his thighs. 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. We and our partners use cookies to Store and/or access information on a device. 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. "@type": "ImageObject", Fine adjust everything and both saws start Normal now. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. By checking & repairing/replacing these, you can fix the issue. Dont substitute it with. Welcome! Does the saw have a compression release? water will not dissolve carbon; it is far too hard to be effected. It is possible however to flood a two stroke which can cause the plug to fowl. Activate the chain brake and then place the chainsaw on a flat, leveled surface. Loosen the nuts and bolts clockwise and then pull out the oil pump gently. I can probably find one with at most 65 PSI. Back to top derwen1959 Long Time User As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. I was given (estate) a small McCulloch chain saw and it started and ran great. The end of the tester must protrude exact the same volume into the cylinder as the spark plug or the reading will be wrong. 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. Now, the gauge might come in a number of size variations, so you need to use an adapter to make a perfect seal between the gauge and the chainsaw. It's also possible the piston or cylinder are scored or carboned up. As far as compression, you can usually tell by how the saw pulls when starting it. Low pressure, 20 to 30 pounds is all you need. It may not display this or other websites correctly. "width": 200, Check if the wires are damaged or broken and replace them if necessary. Check the electrode gap of the spark plug and ensure it is 0.02 inches. As long as I can get it going.. I;ve read somewhere to put water? 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. anthonyg_ma Original Author 16 years ago Canguy, thnks for the tips! 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. 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. Remove the sprocket and the washer. Stihl recommends using 89 octane gasoline without ethanol, and the gas should not contain more than 10% ethanol. Soaking in water will do nothing but rust things up . Is the spark plug the correct one for the saw? As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. It's supposed to warm up later this week so I'll be able to do some more on this chain saw. If that doesnt work, try gently tapping on the side of the bulb with a screwdriver or other tool. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out.

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