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. If the rails are shallow, you need to replace them. I bought 2 032 Stihl saws at auction that pulled very hard. i have a ms 250. It runs good after I get it started. I hook up a drill to the nut on the clutch and start hard starting saws that way . Replace the fuel filters instead of cleaning them as they are pretty affordable and easy to install too. It runs good after I get it started. That is a high compression saw, pull the rope slowly until you feel resistance then give it a short quick pull. Press J to jump to the feed. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. We and our partners use cookies to Store and/or access information on a device. You are using an out of date browser. Suitable Replacement Stihl MS 250 C Compression Release Parts JavaScript is disabled. Oct 24, 2011 / Chainsaw excessive compression #1 . It will be apparent if it is, but usually a scored saw won't run good, if at all. Also take the spark plug out and do the same. When the oil pimp or oiler is faulty, it will reduce the chainsaws performance and power. Cylinder Compression Plug Applicable Model For STIHL 021, 023, 024, 025, 026, 044, 046, 066, MS210, MS230, MS240, MS250, MS260, MS341, MS360, MS440, MS460, MS650, MS660 Chainsaw Parts Refer To Part No. 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. 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. Disengage the chain brake, turn on the ignition switch and install the new spark plug into the rubber connector. 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. "@context":"https://schema.org", Also, remove the muffler and check for carbon buildup. Consequently, operating this chainsaw becomes a really difficult chore to do. The consent submitted will only be used for data processing originating from this website. 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. 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. 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. 24" is what I've got on mine, but it can handle a bigger 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. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. A reddit for all operators of chainsaws to post experience with tools, pictures of their new saws and old workhorses and any maintenance tips. Always change the spark plug after 100 operating hours of the chainsaw to avoid engine problems. Hope this helps. You never try to get it to run with the choke on. Use a screw wrench to loosen the nuts on the guide bar side panel to give you room to adjust the chain. Wipe off the excess fuel from the spark plug with a clean rag. It can be from something as simple as starting the chainsaw wrongly to more severe issues like a damaged carburetor. Blup throttle to bring it down to idle. Check if the wires are damaged or broken and replace them if necessary. 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 Repair or replace the damaged part 2. Fine adjust everything and both saws start Normal now. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. JavaScript is disabled. Remove ignition coil and muffler. I hope you understand the problems why your chainsaw is hard to pull. Try blowing the crankcase out with air. There might be a small stone or thing that is stuck inside the starter and causes the rope not to retract. Its just that its nearly impossible to pull. Sometimes an adapter is needed to make a tight fit. 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. It had a compression release, and it started and ran well. When the fuel starts to turn stale, it gums up and clogs the carburetor just as it would in an unused lawnmower. or Best Offer. 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 A hot engine also requires more compression to convert furl into energy as compared to the colder one. The owner is complaining of hard to pull start. I'm an arborist by profession & a blogger by passion. 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. Poke the oil feed hole with a 16-gauge wire to unclog it until it slides through the hole smoothly. Change in temperatures and dirt will cause clogging anywhere the oil passes, and this can prevent the oil from spread all across the bar. When the air that reaches the chain saw's engine is insufficient, it becomes prone to overheating. Starter fluids spray can help in those conditions Before pulling shoulder. If the chainsaw wont stay running when the engine is idle, adjust the carburetor. "@id":"https://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=toolt&th=435118", If you experience low compression, pull the muffler and check the piston and cylinder for, Read More How Much Compression Should a Chainsaw HaveContinue, The possible reasons can be the battery not being charged, properly connected, or dead. Pull the rope until it starts. The exhaust side of the piston is a warm gold. 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. Try blowing the crankcase out with air. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. That would have to be some puddle of oil for a MS250 to have a "bar oil leaking in and causing high compression problems" What kind of Stihl oil regular or synthitc, had an 025 years ago that was a real knuckel buster never checked compression but was using regular Stihl oil. 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. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. For a better experience, please enable JavaScript in your browser before proceeding. Advanced arborist chainsaw with a top handle and STIHL M-Tronic technology. Most Stihl chainsaws have a resistance of 0.2-3.0 ohm on the primary coil and 5-20 kiloohm on the secondary coil but always confirm the correct reading for your model number. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. 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. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. It is best to put a new plug in after clearing. The chainsaw motor engine capacity can range from 30CC and 50CC to 150 CC. Lift the bars nose and tighten the nuts on the sidebar to secure the sidebar and guide bar in place. }, "userInteractionCount": 23 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. You are misunderstanding WHY water is put into carboned up engines. Ask him if he's drop-starting it. 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. However, you still have to confirm the size of the gap before installing. Can also be used with hedge trimmer attachment HS 246. If you see any unusual movement of spring, then take it in to replace it. Cleaned it all up, and had it tuned up. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. If you do not replace the starter spring on time, it will cause you to replace the whole starter assembly. Even with new spark plugs in, incorrectly removing and installing the spark plugs can prevent the engine from starting. Pull trigger and set full choke. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. If oil is in there it is what makes the engine feel like it is almost locked up. It is harmful to your machine to use old fuel. If the coil is faulty, there will be no spark to start the engine and run the chainsaw. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. You are misunderstanding WHY water is put into carboned up engines. "@id": "https://www.yesterdaystractors.com/" Of all the Stihl saws, the MS250 is the toughest to start in relation to it's size. That is the nature of a 250. Sounds flooded, or maybe wrong sparkplug? Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. $99.95. Manage Settings 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. 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. Recognised as a leading saw in the forestry industry, it is available in guide bar lengths 13"/32cm to 18"/45cm. After initial pull on rope (which feels like vapor lock on cylinder), saw will start on second or third pull. I thought all the fuel was out but there was some in the line yet. "datePublished": "2017-08-17", The carburetors work in a chainsaw engine allows the right amount of fuel and air mixture into the combustion chamber. How To Fix Chainsaw Battery Charger Blinking Red? 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. As far as compression, you can usually tell by how the saw pulls when starting it. This article will help you fix the most commonly reported problems of a Stihl chainsaw. Are you sure the starter rope isn't a little too short? 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. 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. check the cylinder & piston for carbon build-up, how much compression Does the chainsaw Engine need, How To Reset Echo 58-Volt Battery Charger. Move the selector lever up one position immediately or the saw will flood on the very next pull. Flooding usually happens due to an underlying issue: a bad spark plug, bad gas, or a faulty carburetor. 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. . The ignition coil transmits electricity to the spark plug to create a spark that ignites the engine. I luv my 064. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . 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. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. If the starter spring is keep working correctly, it will retract the ignition rope. Also check the air filters and make sure they are clean. There is no idle when I release the trigger. I;ve read somewhere to put water? When this pressure, or compression, is too low or high, the chainsaw . If anything prevents the right amount of fuel into the combustion chamber, the chainsaw wont start. 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. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. STIHL MS 170 Chainsaw (NEW) full pack $295.00 $59.00 shipping Stihl MS170 Chainsaw Motor Fast Free Shipping $75.00 Free shipping or Best Offer Stihl 16 inch bar + Chain for MS170 - MS251 3/8 Pitch .043 Gauge 55 drivers $79.75 $25.45 shipping Only 3 left Stihl MS170 Chainsaw motor OEM Fast/Free Shipping $85.00 Free shipping or Best Offer Try taking it out, Then holding the trigger while you pull fast. The other cause of your chainsaws high compression could be the stuck ignition rope. You never try to get it to run with the choke on. 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! Then Google "decarb". Stihl 024 - Sherlock Holmes issue - help needed here. It prevents the carburetor from allowing too much fuel into the combustion chamber. Not sure it would accomplish anything on a 2-stroke chain saw engine. We will explain the causes of high compression and how you can quickly fix it to make it run smoothly. If it is not physically damaged, clean it with clean gasoline and a rag. link to Indoor Fly Traps: 5 Things You Didn't Know About Indoor Fly Traps. Would not be afraid to do it to a 4, 6, or V-8. 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. 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. Most times, when the Stihl chainsaw stops working, it is never a complete breakdown. 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. It was metering lever. Check the spark plug and replace it if needed. 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. Soaking in water will do nothing but rust things up . Don't put water into the 2 stroke. Make sure the keyway is lined up correctly and tighten the nut down good and tight. Without proper compression, the engine will not be able to suck and use the fuel for combustion. However, if I push downward on the trigger button, it slows down to. I hook up a drill to the nut on the clutch and start hard starting saws that way . Unscrew the spark plug wrench using a spark plug from the engine. Pull trigger and set full choke. Carboned rings will decrease not increase compression. An engine is fit on the rear side of a chainsaw. Take off the muffler or the carb to get access. Has anyone ever seen a stock MS250 or any stock stihl with 190psi of compression? ", If it is the right sparkplug and not flooded, I would maybe buy a different saw with easy start. The ideal pressure range of the Stihl chainsaw is between 90 and 110 psi. 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. Not sure it would accomplish anything on a 2-stroke chain saw engine. Usually, this happens when you use a chainsaw after a very long time or by wear and tear of the rope. Hold the tip of the blade and adjust the tension of the chain correctly. If your saw doesn't have a compression release since like you say its not a pro, then the two things I would check is either the go through recoil assembley with a fine tooth comb. The switch might be damaged or the motor is burned out. 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. Youre familiar with how to start a stihl yes? read more Vince O. Pour starting fluid into the carburetor and crank the engine several times. It's an older saw I bought at a garage sale. no, afraid I don't have equipment to test. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. Keep in mind that the stuck ignition rope can also damaged other parts inside the starter assembly. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. Why is the Garage Door Opener Light Not Working? It uncoils, tightens the spring, engages the clutch to start the engine. I;ve read somewhere to put water? My first chain saw was an old Homelite EZ with a blue metal case and a 20" bar. Tighten the tension screw with a screwdriver to tighten the chain around the bar. Stihl is a leading manufacturer of chainsaws and other handheld outdoor and landscaping power tools. 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. Take off the muffler or the carb to get access. Turn the idle speed clockwise until the saw idles and chain turns, and then make a one-fourth counterclockwise turn. Are you sure the starter rope isn't a little too short? what and or where is the metering lever.? You are misunderstanding WHY water is put into carboned up engines. Generally the minimum is 110 lbs. First, remove the spark plug from the chainsaw. Press question mark to learn the rest of the keyboard shortcuts. That model is extremely easy to flood. If you find the brake drum moving, you must replace the needle bearing. Similarly, a 4-stroke engine needs 2 times more compression than a 2-stroke engine, around 180-210 PSI. Maybe the piston is hitting it. } 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. You're familiar with how to start a stihl yes? But it was stolen along with other tools around 1990. "url": "https://www.yesterdaystractors.com/graphics/smllogo.png", I hook up a drill to the nut on the clutch and start hard starting saws that way . Replace the spark plug with a new identical. You will notice the compression less. I have had the cylinder off. A lot of variables might contribute to excessive compression while using a chainsaw. You can prevent the new starter rope from fraying by burning the two ends of the rope. High compression in chainsaws is a dangerous problem that can lead to serious injuries. Replaced the chain and did some serious cutting and was so pleased. Spark plugs that are not functioning properly are another probable cause of excessive compression. Don't put water into the 2 stroke. If your chainsaw doesnt automatically turn it off or you forget, the engine cuts off immediately. 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. If it looks physically fine after cleaning it and you havent changed it in a few seasons, you should still replace it. Any help out thereEGBinOR Get you some Sea Foam at the local auto parts store. }, I would suspect the timing is too early. It will be apparent if it is, but usually a scored saw won't run good, if at all. It is like there is 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. 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. I would never put water in it! Register today and take advantage of membership benefits. First, remove the cylinder and piston from the chainsaw. Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. I got it started. Reddit and its partners use cookies and similar technologies to provide you with a better experience. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . Check the spark plug of the chain saw if the engine is not starting at all. Friction is usually the cause of a rope failing to draw when it should. Check the electrode gap of the spark plug and ensure it is 0.02 inches. Make sure it's greased and the bushings are good. If the reading is below or above the required range, then your ignition coil requires changing. Please use the navigational links to explore our website. In most cases, a buildup of carbon under the rings presses the rings against the cylinder, culminating in compression of the cylinder. 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. "name": "Yesterday's Tractor Co.", If it does maybe it is plugged. dizzy spells after stopping birth control,
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