If the compression is not produced in the engine at an appropriate level, it will not be able to convert fuel into energy. It is typical for the Stihl chainsaw to develop some issues, and when this happens, some basic troubleshooting will help identify the source of the issue and solution to help it run smoothly. Because of an absence of lubrication, the chain saw system becomes brittle, resulting in excessive compression of the chain saw mechanism. Even with new spark plugs in, incorrectly removing and installing the spark plugs can prevent the engine from starting. You need to pull the exhaust to check that. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. 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. 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. The saw feels good in my hands and its got a surprising amount of power. The key on the flywheel is in place and not sheered. A clogged carburetor wont allow fuel into the engine, preventing it from starting. 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. Normally it's not a problem but if it was already difficult to pull it could be. Make sure you have a replacement spark plug on hand in case the problem recurs in the future. Try it, it may just do the trick! Lift the bars nose and tighten the nuts on the sidebar to secure the sidebar and guide bar in place. after that I'd be looking at crank bearings. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. Create an account to follow your favorite communities and start taking part in conversations. "@type": "Person", $99.95. "name": "Egbinor" Check for any cracks and damages and replace if necessary. I would never put water in it! Likewise, low compression in the engine will be slow and retarding and it is a warning sign of leakage in your engine. Follow the steps below on how to fix a flooded chainsaw engine. You are misunderstanding WHY water is put into carboned up engines. If the starter spring is keep working correctly, it will retract the ignition rope. #1. If the chainsaw still wont start, it is defective and requires a replacement. Remove the right side cover, bar, and chain. 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. Blup throttle to bring it down to idle. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. It would give you rusted bearings. Take off the muffler or the carb to get access. The Stihl chainsaw uses a four-position lever ignition system called the master control lever. $49.99. You may also want to go ahead and replace the plug. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. If you suspect a compression issue, seek professional help as compression repairs can be complicated. Low pressure, 20 to 30 pounds is all you need. The exhaust is black but no build up. 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. I think that's what I'd do. Find the low speed, high speed, and idle speed screws near the carburetor, start the engine and allow it to warm up. An excessive amount of compression in your chainsaws starting rope could also be indicated by the beginning rope failing to draw. Being new carb, wasn't looking that direction educate a non mechanic. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. You can check the compression by pulling the spark plug out and holding it in your hand. Check if the wires are damaged or broken and replace them if necessary. 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. I got it started. When it comes to compression values, those between 90 and 110 psi are deemed to be acceptable. Wipe off the excess fuel from the spark plug with a clean rag. I'm an arborist by profession & a blogger by passion. The first step is to remove the cover that covers the spark plug on your chainsaw. Register today and take advantage of membership benefits. We have explained the most effective way to unflood a chainsaw engine below. 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. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. Once the 250 is running, its fine. It is harmful to your machine to use old fuel. I;ve read somewhere to put water? 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. At this point, the battery will reset,, Read More How To Reset Echo 58-Volt Battery ChargerContinue, The chainsaw battery charger is constantly blinking red, even after charging for a long time!!! I have had the cylinder off. The Housing is the outer cover of the starter, and if it is damaged, your chainsaw suffers stiffness during a pull. Sounds flooded, or maybe wrong sparkplug? ", I think you'll like it. }, in the, All Rights Reserved. That is the nature of a 250. 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. I wouldn't go messing with the carb expecting to cure the issue unless you have obvious signs of flooding when trying to start. Pull the starter rope until you hear the first sign of it firing with a small burp. The ignition coil transmits electricity to the spark plug to create a spark that ignites the engine. Therefore, most people will wonder why the chainsaw has too much compression. 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. It will be apparent if it is, but usually a scored saw won't run good, if at all. Turn the engine to get under the piston and blow the crankcase out. The other cause of your chainsaws high compression could be the stuck ignition rope. If it does maybe it is plugged. Some of the contributing reasons include a full tank of oil, carbon buildup on the exhaust system, and malfunctioning spark plugs. "url": "https://www.yesterdaystractors.com/graphics/smllogo.png", Free shipping. My husky 266xp has been that away from newjust pull over slow for 2 or 3 times and then try cranking.. 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?? I think that's what I'd do. Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. Change in temperatures and dirt will cause clogging anywhere the oil passes, and this can prevent the oil from spread all across the bar. Stihl MS192T Chainsaw Fuel Oil Tank Engine Housing Assembly OEM. Remove the entire carburetor and clean it. Hello D beatty, Here is a link for two stroke engine air cycle, Guido. I was given (estate) a small McCulloch chain saw and it started and ran great. The chain clutch might be, Read More Cordless Chainsaw Wont StartContinue, The most common reason is simply the wrong battery. 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. Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. If any of these components are worn or broken, the chain saw wont start even with fuel. Would have to remove spark plug and rinse cylinder with gas to be able to start. If this is the case, you may want to try lubricating the rope to see if it would assist to resolve the difficulties. By checking & repairing/replacing these, you can fix the issue. Spark plugs that are not functioning properly are another probable cause of excessive compression. If oil is in there it is what makes the engine feel like it is almost locked up. Stihl recommends using 89 octane gasoline without ethanol, and the gas should not contain more than 10% ethanol. Obviously, the motor, which has a huge capacity, will require more compression. You can check the compression by pulling the spark plug out and holding it in your hand. If the chainsaw wont stay running when the engine is idle, adjust the carburetor. Replace the spark plug with a new identical. If the compression is too high or too low, the engine wont start. Don't know what to do at this point. So be sure to keep your chainsaw properly maintained and avoid compression problems. Quoting Removed, click Modern View to see What?? or very unlikely but happened to me on an 041 make sure the crank hasn't shifted and started to bind. Check the electrode gap of the spark plug and ensure it is 0.02 inches. Modern View Forum powered by phpBB 2001, 2005 phpBB Group. It is significantly tougher to pull over than an 024 or the new 241. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. link to Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. "datePublished": "2017-08-17", I missed the "no carbon". 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. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . That is the nature of a 250. As far as compression, you can usually tell by how the saw pulls when starting it. 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. or Best . Not sure it would accomplish anything on a 2-stroke chain saw engine. Make sure the crank taper is clean and the flywheel taper also. 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. Versions MS 260, Bar length 37cm, RSC "mainEntityOfPage": { As a result, normal compression settings will change based on the kind of chainsaw machine you are using. Most times, when the Stihl chainsaw stops working, it is never a complete breakdown. 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 are misunderstanding WHY water is put into carboned up engines. Below we have discussed the most common reasons why your chainsaw wont idle and the best way to fix it. The power of the motor of an engine is measured in its capacity. link to Indoor Fly Traps: 5 Things You Didn't Know About Indoor Fly Traps. Turn the engine to get under the piston and blow the crankcase out. The lack of oil dries the chainsaw assembly, which causes high compression and becomes very difficult for you to handle the chainsaw. Keep in mind that the stuck ignition rope can also damaged other parts inside the starter assembly. Try taking it out, Then holding the trigger while you pull fast. Then, use a wire brush to remove all the carbon build-up from the cylinder and piston. The engine creates a vacuum pressure inside it. Does the saw have a compression release? A smaller gap will cause a weak spark and poor ignition of the engine, while a wider gap will not bring out any spark. 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. It had a compression release, and it started and ran well. Neighbor brought me his Stihl MS250 complaining that it tries to pull his arm from socket when starting. Here is how to troubleshoot a malfunctioning spark plug. The compression limit should also be doubled if the engine capacity is 100 CC. "width": 200, Getting these problems resolved is a rather straightforward process. 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. Here is a link for two stroke engine air cycle. Repair or replace the damaged part 2. Would not be afraid to do it to a 4, 6, or V-8. Check the tension 2. 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. "interactionType": "https://schema.org/CommentAction", Didnt somehow get straight oil in the cylinder did you? When the motor warms up after about a minute, turn on the choke position. Would have to remove spark plug and rinse cylinder with gas to be able to start. 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. I;ve read somewhere to put water? Check for dirty fuel tanks, clogged fuel filters, loose pipes, clogged air filters, and a dirty carburetor, which can all the fuel volume going into the combustion chamber. Low pressure, 20 to 30 pounds is all you need. It may not display this or other websites correctly. }, When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. Use an adjustable wrench to loosen the two nuts on both sides of the chainsaw. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. 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 bought an old beater 621 Jonsered once that had very high compression, got it running well and sold it, made some money on it! The recoil starter in a chainsaw is a start mechanism that allows you to pull the rope. If so, show him how to start it on the ground with his foot in it or with the rear handle between his thighs. Replace with a new starter house Problem 2: Damaged pulley system Solution: 1. You have an option to either pull off the starter and clean it or look for an ideal replacement for your starter house. "description":"Discussion of Chainsaw has too much compression in the Tool Talk forum followed by comments. Make sure there is oil in the engine. Check the spark plug of the chain saw if the engine is not starting at all. chain saw compression release mod. Similarly, a 4-stroke engine needs 2 times more compression than a 2-stroke engine, around 180-210 PSI. I would suspect the timing is too early. 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. There is no idle when I release the trigger. There is no carbon build up and all looks like new. This could be understood by reading the further explanation below. Please use the navigational links to explore our website. Does the saw have a compression release? Not sure it would accomplish anything on a 2-stroke chain saw engine. Every chainsaw needs to have some compression to ensure that it operates well. Use a screw wrench to loosen the nuts on the guide bar side panel to give you room to adjust the chain. Ron Cook. Soaking in water will do nothing but rust things up . Dont substitute it with. Wipe off lubricant and grime from the bar with a clean rag. Doesnt pull at all or just hard to pull. When the engine starts running, turn the choke off. For a better experience, please enable JavaScript in your browser before proceeding. Do that to the starter side when you're looking at the starter assy. 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. The spark arrestor in a chainsaw traps exhaust products emitted from an internal combustion engine. It would give you rusted bearings. anthonyg_ma Original Author 16 years ago Canguy, thnks for the tips! 24" is what I've got on mine, but it can handle a bigger bar. It is a prevalent issue and can be fixed and detected easily without consulting a mechanic. If it is the right sparkplug and not flooded, I would maybe buy a different saw with easy start. The manual for this model, and the parts breakdown, show a compression release valve. Get you some Sea Foam at the local auto parts store. A drastic and frankly silly thing to do though . That is what was told to me by the area distributor technician Check for side play in the crankshaft. If it is not physically damaged, clean it with clean gasoline and a rag. Press question mark to learn the rest of the keyboard shortcuts. The saw is about 2 years old, light use. let it idle over lunch, just made sure to not go too long between filling it with gas, while running of course. I think that's what I'd do. We describe all the possible issues and also suggest the solutions to fix them too. Sparkplug was correct but I think it was a little flooded. Greenworks Commercial GS181 82V 18-inch Chainsaw: 50cc gas equivalent power with a stock 18-inch bar and chain ( starting at $349) I love to write about chainsaw for homeowners and professionals. We got rid of both of those useless things . "@context":"https://schema.org", An engine is fit on the rear side of a chainsaw. Your chainsaws compressive strength is measured with the use of a screw-in gauge. Hello D beatty, Here is a link for two stroke engine air cycle, Guido. "headline":"Chainsaw has too much compression", "publisher": { Ensure the chain fits snugly inside of the bar and the teeth that keep it in place are not worn down too low. That is a high compression saw, pull the rope slowly until you feel resistance then give it a short quick pull.

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