You will notice the compression less. Compression gauges are not always accurate and different engines will provide different results. Also check the air filters and make sure they are clean. 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 pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. It can be from something as simple as starting the chainsaw wrongly to more severe issues like a damaged carburetor. of compression. Sounds flooded, or maybe wrong sparkplug? "mainEntityOfPage": { It uncoils, tightens the spring, engages the clutch to start the engine. Modern View Forum powered by phpBB 2001, 2005 phpBB Group. "height": 57 let it idle over lunch, just made sure to not go too long between filling it with gas, while running of course. However, you still have to confirm the size of the gap before installing. 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?? Welcome! check the cylinder & piston for carbon build-up, how much compression Does the chainsaw Engine need, How To Reset Echo 58-Volt Battery Charger. Check if the wires are damaged or broken and replace them if necessary. Disconnect the spark plug from the engine and inspect if it is damaged, eroded, or dirty. How big a fella are ya? It will be apparent if it is, but usually a scored saw won't run good, if at all. If the chainsaw is too little compression, it may start easily but will not run smoothly. Spark plugs that are not functioning properly are another probable cause of excessive compression. We got rid of both of those useless things . This could be understood by reading the further explanation below. 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. ", The early 064, 044, 066 came with a red master control. Chainsaw "Hard To Pull" Issues: Check & Fix (Within 5 Min) You are using an out of date browser. I'm hearing thats just the nature of the beast. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. Sometimes, the ignition rope is frayed or stuck inside the starter housing. Recognised as a leading saw in the forestry industry, it is available in guide bar lengths 13"/32cm to 18"/45cm. You can unclog the carburetor if the clog is minor. Every time you fuel the chainsaw, you should make sure to drain the old fuel first to avoid contaminating the new fuel. Other than damaged parts, using the choke position to start a warm saw often causes a flooded engine. link to Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. Don't put water into the 2 stroke. 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. Check the chain tension and adjust it if it is too loose or tight. The chain oil will keep the chain lubricated, keep off dirt and allow smooth movement. 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 get it going now and its easier but its still a bear. 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. Once it's removed, you can place a gauge on the place of the spark plug. Its just that its nearly impossible to pull. 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. Insert the air filter and the spark plug, reconnect the spark plug wire, and close the opening. Use of this Web site constitutes acceptance of our. Carboned rings will decrease not increase compression. The exhaust is black but no build up. The ignition system is responsible for igniting the fuel and air mixture to produce energy that powers the chainsaw. Remove the right side cover, bar, and chain. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. The plug should be tight against your thumb. Getting these problems resolved is a rather straightforward process. 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. A heavy-duty engine gets hot faster and works better than a cold engine. It runs good after I get it started. Would not be afraid to do it to a 4, 6, or V-8. . what and or where is the metering 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 is usual for the chainsaw chains to come off with continued use, but there is usually an underlying cause when its too repetitive. This can lead to serious injuries, including cuts and amputations. If the starter spring is keep working correctly, it will retract the ignition rope. (there is some play when flywheel on shaft (nut not attached) 3. tank and oiler vents are operating 4. exhaust has been removed and spark arresting screen checked (clean) 5. piston/walls checked.. no scarring Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. Several reasons can cause your Stihl chainsaw to bog down when your pull the trigger. It runs good after I get it started. Typically, several reasons cause too much compression in a chainsaw and these include but are not limited to: Another common cause of chainsaw compression problems is a faulty quantity of old gasoline. Pull trigger and set full choke. Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. I was given (estate) a small McCulloch chain saw and it started and ran great. 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. The owner is complaining of hard to pull start. 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. Check the spark plug of the chain saw if the engine is not starting at all. I would never put water in it! Chainsaw compression too much. Won't start. - YouTube Guido Quoting Removed, click Modern View to see What?? Clean any mildly dirty parts and replace all the damaged parts. $99.95. Turn off the choke by pressing the control lever to activate the fast idle. $799.99 CHOOSE AN OPTION Deliver From Store e.g., 123 Your Street, Virginia Beach, VA 12345 Add to Cart Order Online - Pick Up In Store Currently Shopping At: JC Licht Ace Hardware-Bridgeport (773) 523-8888 Change My dealer Features STIHL M-Tronic Not sure it would accomplish anything on a 2-stroke chain saw engine. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. The vibration of the tool during use can run some fasteners loose, preventing it from starting again. Each chainsaw has a different level of compression. A faulty spark plug will have carbon, dirt, and oil blocking the insulator nose, preventing it from firing consistently. You can follow the steps on how to troubleshoot and revive it when it wont start. Loosen the nuts and bolts clockwise and then pull out the oil pump gently. Can anyone make a suggestion. Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. Soaking in water will do nothing but rust things up . Pull the starter rope until you hear the first sign of it firing with a small burp. Starting fluid will make the fuel more combustible and makes the process of clearing out the combustion chamber much quicker. Does the saw have a compression release? 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. You are misunderstanding WHY water is put into carboned up engines. Always change the spark plug after 100 operating hours of the chainsaw to avoid engine problems. 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. We're all about fixing small engines, from carburetor rebuilds, to crankshaft machining. I think that's what I'd do. 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. Has someone invented a new kind of two stroke motor? Let saw run until its warmed up, and go cut wood. 4 Possible Problems & Solutions Problem 1: Damaged starter housing Solution: 1. Take off the muffler or the carb to get access. People sometimes try to cut down a tree that is too big for their chainsaw. Press question mark to learn the rest of the keyboard shortcuts. Quoting Removed, click Modern View to see What?? If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . Lift the bars nose and tighten the nuts on the sidebar to secure the sidebar and guide bar in place. To inspect the guide bar, disassemble the chain cover, chain and bar. When this pressure, or compression, is too low or high, the chainsaw . The ideal pressure range of the Stihl chainsaw is between 90 and 110 psi. Stihl MS250 hard to pull? in Chainsaws - The Forestry Forum If it is hard to pull, then check how the spring is performing. I hook up a drill to the nut on the clutch and start hard starting saws that way . }, Likewise, low compression in the engine will be slow and retarding and it is a warning sign of leakage in your engine. Stihl Chainsaw running too fast - HomeOwnersHub As the chain moves over the bar, it spreads the oil across the moving parts to reduce friction and heat. A smaller gap will cause a weak spark and poor ignition of the engine, while a wider gap will not bring out any spark. Free shipping. Are you sure the starter rope isn't a little too short? I missed the "no carbon". It is best to put a new plug in after clearing. Are you sure the starter rope isn't a little too short? You will notice the compression less. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. Even though it was purchased "brand new" I'm not so sure. Wipe off lubricant and grime from the bar with a clean rag. Here is a link for two stroke engine air cycle. in the. How Much Compression Should a Stihl 066 Have? - SFGATE 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. For 503552201 Cylinder Compression Plug Package Include: 3 x Cylinder Plug Cylinder Compression Plug When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. If that doesnt work, try gently tapping on the side of the bulb with a screwdriver or other tool. Choke cannot be used even when engine cold, or flooding occurs. I would suspect the timing is too early. NelsGarage will share the knowledge Ive gathered about different tools and give you tips to accomplish your DIY projects faster. After that, using a ratchet, remove the spark plug from the engine. Help, can't pull start Stihl MS250 chainsaw, too much compression. I have had the cylinder off. It had a compression release, and it started and ran well. Press question mark to learn the rest of the keyboard shortcuts. First, remove the cylinder and piston from the chainsaw. 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.. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. Yeah, I must have flooded it as I was working on it. If there is any damage to the pulley at any stage, it will cause High Compression or stiffness during a pull.. pulls with little resistance, similar to my farm boss. It may not display this or other websites correctly. But the saw just has a rubber piece on the top shroud with a slotted nut that just fastens it to a stud on the cylinder head, where the valve should be. I hook up a drill to the nut on the clutch and start hard starting saws that way . Get you some Sea Foam at the local auto parts store. Don't know what to do at this point. Every chainsaw engine has a different capacity depending upon its motor power. 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. 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. Keep in mind that good maintenance and storage will reduce breakdowns and maintain your tools performance throughout its lifetime. 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! "headline":"Chainsaw has too much compression", Once the 250 is running, its fine. Take off the muffler or the carb to get access. Reddit and its partners use cookies and similar technologies to provide you with a better experience. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. As long as I can get it going.. Low pressure, 20 to 30 pounds is all you need. I can probably find one with at most 65 PSI. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . The compression limit should also be doubled if the engine capacity is 100 CC. }, It works when cold-starting the engine, when the engine is idle and when the engine is open. The flywheel is loose? It does not take much to increase the compression. } Wipe off any dirt and debris and check for any signs of damages. Yes I tried that last time and it did help some. How Much Compression Should A Chainsaw Have - Toolsadvisorpro That is what was told to me by the area distributor technician. The lack of oil dries the chainsaw assembly, which causes high compression and becomes very difficult for you to handle the chainsaw. 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. Move the selector lever up one position immediately or the saw will flood on the very next pull. If the coil is faulty, there will be no spark to start the engine and run the chainsaw. Make sure you have a replacement spark plug on hand in case the problem recurs in the future. High compression in chainsaws is a dangerous problem that can lead to serious injuries. after that I'd be looking at crank bearings. 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. Greenworks Commercial GS181 82V 18-inch Chainsaw: 50cc gas equivalent power with a stock 18-inch bar and chain ( starting at $349) Do that to the starter side when you're looking at the starter assy. A problem in the ignition system is likely to be the culprit when the chainsaw doesnt spark. Uninstall the spark arrestor and unblock it using a brush, but you can also replace it for efficiency. Hello D beatty, Here is a link for two stroke engine air cycle, Guido. in the, All Rights Reserved. The plug should be tight against your thumb. My name is Chris Ross. Pull the rope until it starts. Most times, when the Stihl chainsaw stops working, it is never a complete breakdown. 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. water will not dissolve carbon; it is far too hard to be effected. 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! OEM GOOD USED STIHL 048AV CHAINSAW SHORT BLOCK ENGINE 120 PSI COMPRESSION. Create an account to follow your favorite communities and start taking part in conversations. Now it has sat since the last use and I went to start it and it turned over maybe three times and the compression . Has anyone ever seen a stock MS250 or any stock stihl with 190psi of compression? No compression when pulling start rope. If your chainsaw doesnt automatically turn it off or you forget, the engine cuts off immediately. When there is no air for the spark to ignite, the chainsaw will start and then die after a short while. Thanks. Didnt somehow get straight oil in the cylinder did you? There are sprays (power tune) for removing carbon, but I doubt if that's your problem. No carbon on top or on roof of cylinder. Any ideas? Turn the engine to get under the piston and blow the crankcase out.
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