We got rid of both of those useless things . 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. Turn the engine to get under the piston and blow the crankcase out. Don't put water into the 2 stroke. Please use the navigational links to explore our website. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. 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. 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. More information can be found on this page. It is best to put a new plug in after clearing. Rinse the filter and allow it to air dry before reinstalling it. On a 2 stroke the water would go into the crank case first and pool up. Sparkplug was correct but I think it was a little flooded. Move the selector lever up one position immediately or the saw will flood on the very next pull. 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. Most of the time, the chainsaw cord became hard to pull because of the Starter Housing. Are you sure the starter rope isn't a little too short? How Many Amps Does a Garage Door Opener Use? No carbon on top or on roof of cylinder. Over time or when using the wrong fuel, the fuel filter becomes too clogged and restricts fuel flow, killing the engine shortly after starting. The chainsaw motor engine capacity can range from 30CC and 50CC to 150 CC. Every chainsaw requires a different compression level according to its built-up and model number. And some will have more. Normally it's not a problem but if it was already difficult to pull it could be. 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. 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. I bought 2 032 Stihl saws at auction that pulled very hard. So, in our suggestion, one of the first things to check while feeling high compression is the starter spring. Required fields are marked *. I think that's what I'd do. 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. Free shipping. Clean any mildly dirty parts and replace all the damaged parts. If oil is in there it is what makes the engine feel like it is almost locked up. An engine is fit on the rear side of a chainsaw. I hook up a drill to the nut on the clutch and start hard starting saws that way . Check if the wires are damaged or broken and replace them if necessary. Mar 22, 2017. Even with new spark plugs in, incorrectly removing and installing the spark plugs can prevent the engine from starting. "@type": "Organization", 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. If I drop start it I can pull it through 1 compression stroke. Carboned rings will decrease not increase compression. The chain oil will keep the chain lubricated, keep off dirt and allow smooth movement. 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. You can clean and mildly clogged carburetor but if it is too severe, replace it with one compatible with your chainsaw model. A clear sign that you may have a chainsaw engine is when you smell gas while starting it. water will not dissolve carbon; it is far too hard to be effected. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . I thought all the fuel was out but there was some in the line yet. It may not display this or other websites correctly. You should also make sure the new gas you use is appropriate for the chainsaw. A problem in the ignition system is likely to be the culprit when the chainsaw doesnt spark. Pour starting fluid into the carburetor and crank the engine several times. 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. Don't know what to do at this point. Don't know what to do at this point. Convenient, durable and robust with minimum weight, the STIHL MS 260 can come with a number of optional features to make the job even easier. Make sure it is snug but can also move freely by hand. 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. 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. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. When the fuel starts to turn stale, it gums up and clogs the carburetor just as it would in an unused lawnmower. I got it started. Generally covering everything under 25 HP. 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. Getting these problems resolved is a rather straightforward process. 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. That is the nature of a 250. To ensure correct functioning and to prevent excessive compression, you might have to repair worn-out parts with new ones. You are misunderstanding WHY water is put into carboned up engines. I'm an arborist by profession & a blogger by passion. The plug should be tight against your thumb. . water will not dissolve carbon; it is far too hard to be effected. 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. It uncoils, tightens the spring, engages the clutch to start the engine. Sounds like it was broken in "right", show the guy how to start it and tell him to be happy. You may also notice that the chain saw loses power during operation. 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. Disconnect the spark plug from the engine and inspect if it is damaged, eroded, or dirty. Choke cannot be used even when engine cold, or flooding occurs. I think that's what I'd do. Several reasons can cause your Stihl chainsaw to bog down when your pull the trigger. This may sometimes jam your chainsaws rings, causing it to become inoperable. This article will help you fix the most commonly reported problems of a Stihl chainsaw. It does not take much to increase the compression. If you do not replace the starter spring on time, it will cause you to replace the whole starter assembly. Would have to remove spark plug and rinse cylinder with gas to be able to start. The spark plug is located in the engine and ignites the fuel and air mixture, driving the piston and running the engine. 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. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. Would not be afraid to do it to a 4, 6, or V-8. 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. No compression when pulling start rope. The plug should be tight against your thumb. Press J to jump to the feed. A clogged carburetor wont allow fuel into the engine, preventing it from starting. 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 there is too much fuel, it will not ignite, and the engine wont start. In this case fixing or repairing is required or worst replacing the engine all at once. The other cause of your chainsaws high compression could be the stuck ignition rope. If it does maybe it is plugged. If the chainsaw wont stay running when the engine is idle, adjust the carburetor. This is because your oil is not rated to get to work at a low temperature. Being new carb, wasn't looking that direction educate a non mechanic. If this does not fix the issue, it may be necessary to replace the whole starting rope system with another one. A reddit for all operators of chainsaws to post experience with tools, pictures of their new saws and old workhorses and any maintenance tips. 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. You can use a ratchet to do the task. 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. 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. The compression limit should also be doubled if the engine capacity is 100 CC. Start new topic; Recommended Posts. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. 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. If it is hard to pull, then check how the spring is performing. Reassemble the chainsaw, refill the fuel tank, crank the engine and check for oil along the bar. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. 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. Wash the dirty filter with a non-abrasive detergent and water. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. Now, how much compression the engine of a chainsaw needs depends upon its motor capacity and temperature. "author": { Find the low speed, high speed, and idle speed screws near the carburetor, start the engine and allow it to warm up. I;ve read somewhere to put water? 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. Turn off the choke by pressing the control lever to activate the fast idle. You can follow the steps on how to troubleshoot and revive it when it wont start. People sometimes try to cut down a tree that is too big for their chainsaw. "@type":"DiscussionForumPosting", I've done it to high hour Kohler engines many times. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. Would not be afraid to do it to a 4, 6, or V-8. If the chainsaw is too much compression, it may be difficult to start. The power of the motor of an engine is measured in its capacity. read more Vince O. Check for clogging around the bar oil. First, remove the spark plug from the chainsaw. "interactionType": "https://schema.org/CommentAction", 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. He checked.it clearly says that in the OP. Every chainsaw engine has a different capacity depending upon its motor power. 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. 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 First thing I'd check is the pull start assy. Im Nelson, a DIY enthusiast with a bottomless can-do attitude. I would suggest clearing the cylinder by pulling the rope with the plug out. 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. Final step: removing the old spark plug and installing the new one. 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! "height": 57 I changed to synthitic. The extra effort to pull the saw is probably due to carbon build up on the piston crown and combustion chamber. Would not be afraid to do it to a 4, 6, or V-8. Ron Cook. I've been working on a Stihl 026 chainsaw that John found, and it is very hard to crank. If it has to do with small engines, it's welcome here. 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. $49.99. Confirm the spark plug gap, check and adjust with a feeler gauge or gaping tool. I used to have a Homelite that would do that if I left gas in it. It would give you rusted bearings. 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. 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. Save my name, email, and website in this browser for the next time I comment. That is what was told to me by the area distributor technician That is the nature of a 250. Then Google decarb . Remove the sprocket and the washer. You will notice the compression less. The spark arrestor in a chainsaw traps exhaust products emitted from an internal combustion engine. We have explained the most effective way to unflood a chainsaw engine below. 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. A drastic and frankly silly thing to do though . 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. 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. The choke position is the fourth setting on the master control lever. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. It prevents the carburetor from allowing too much fuel into the combustion chamber. Make sure you have a replacement spark plug on hand in case the problem recurs in the future. That is what was told to me by the area distributor technician. Repair or replace the damaged part 2. You can check the compression by pulling the spark plug out and holding it in your hand. Are you sure the starter rope isn't a little too short? Replace the spark plug with a new identical. When there is no air for the spark to ignite, the chainsaw will start and then die after a short while. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. It's an older saw I bought at a garage sale. If so, show him how to start it on the ground with his foot in it or with the rear handle between his thighs. Try it, it may just do the trick! check the cylinder & piston for carbon build-up, how much compression Does the chainsaw Engine need, How To Reset Echo 58-Volt Battery Charger. It is possible however to flood a two stroke which can cause the plug to fowl. 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. Don't put water into the 2 stroke. Can anyone make a suggestion. If it does maybe it is plugged. MS250 start compression relief stopped working. When the motor warms up after about a minute, turn on the choke position. Check for any cracks and damages and replace if necessary. But it was stolen along with other tools around 1990. Check for side play in the crankshaft. Any ideas? How To Fix Chainsaw Battery Charger Blinking Red? It would give you rusted bearings. "image": { Quoting Removed, click Modern View to see What?? Cleaned air filters and both were very dirty. Stihl chainsaw compression test Joe_Power Jun 2, 2015 Not open for further replies. The exhaust is black but no build up. Wipe off any dirt and debris and check for any signs of damages. 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. The carburetor sucks fuel from the tank, mixes it with the right amount of air, and pushes the mixture into the combustion chamber. Make sure it's greased and the bushings are good. } If the chainsaw is too much compression, it may be difficult to start. If the chainsaw is too little compression, it may start easily but will not run smoothly. It is possible however to flood a two stroke which can cause the plug to fowl. Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. Disengage the chain brake, turn on the ignition switch and install the new spark plug into the rubber connector. To clean it, drain the fuel, spray some carburetor cleaner and loosen the residue with a small brush. If you suspect a compression issue, seek professional help as compression repairs can be complicated. $99.95. There is no idle when I release the trigger. When it comes to compression values, those between 90 and 110 psi are deemed to be acceptable. A 250 is a joy to pull start Compared to my 200+ compression ported saws with no decomp. 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.. All it needs is a few inches missing and it will pull too hard like the compression is too high. Insert the air filter and the spark plug, reconnect the spark plug wire, and close the opening. Keep in mind that the stuck ignition rope can also damaged other parts inside the starter assembly. in the cylinder overnight because the rings are cerboned up? It's supposed to warm up later this week so I'll be able to do some more on this chain saw. 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. Also check the air filters and make sure they are clean. I wouldn't go messing with the carb expecting to cure the issue unless you have obvious signs of flooding when trying to start. I have a MS250 that has come up on compression since new. Your ignition rope must be intact properly with the pulley to work correctly.