When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. 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. You can follow the steps on how to troubleshoot and revive it when it wont start. It works when cold-starting the engine, when the engine is idle and when the engine is open. Rinse the filter and allow it to air dry before reinstalling it. Wear rubber gloves and hold the rubber plug and spark plug about 1-2cm from the metal surface of the engine unit. The end of the tester must protrude exact the same volume into the cylinder as the spark plug or the reading will be wrong. A hot engine also requires more compression to convert furl into energy as compared to the colder one. 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 an old beater 621 Jonsered once that had very high compression, got it running well and sold it, made some money on it! Neighbor brought me his Stihl MS250 complaining that it tries to pull his arm from socket when starting. in the cylinder overnight because the rings are cerboned up? That is what was told to me by the area distributor technician. How Much Compression Should a Chainsaw Have. It is possible however to flood a two stroke which can cause the plug to fowl. Here is how to troubleshoot a malfunctioning spark plug. Also check the air filters and make sure they are clean. Press J to jump to the feed. Chainsaws are very powerful tools, and if theyre not properly maintained, they can easily overcompress the chain, which can cause it to break. People sometimes try to cut down a tree that is too big for their chainsaw. A compression gauge is used to measure the compression of a chainsaw which works similarly to the tire gauge. Flooding usually happens due to an underlying issue: a bad spark plug, bad gas, or a faulty carburetor. If you are trying to start your chainsaw in winter and the oil you used for the chainsaw assembly is not suitable for the winter season, you also feel high compression. 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. Remove the spark plug with a spark plug wrench and clean it with a brush to remove carbon scoring and dirt. On a 2 stroke the water would go into the crank case first and pool up. The saw feels good in my hands and its got a surprising amount of power. Don't know what to do at this point. 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. "datePublished": "2017-08-17", We describe all the possible issues and also suggest the solutions to fix them too. 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. My first chain saw was an old Homelite EZ with a blue metal case and a 20" bar. 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. 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. Below are the reasons the chain keeps coming loose and how to fix it. It is thus highly recommended that you drain the fuel from your chainsaw if it still has any old gasoline left in it. So be sure to keep your chainsaw properly maintained and avoid compression problems. Would have to remove spark plug and rinse cylinder with gas to be able to start. Your email address will not be published. For a better experience, please enable JavaScript in your browser before proceeding. "author": { How Much Does it Cost to Install a Garage Door Opener? pulls with little resistance, similar to my farm boss. For the chainsaw to function appropriately, you must maintain the proper amount of tension on the chain. #3. 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. I hope my epic guides will help you to choose,buy and maintain chainsaw. It was easier to pull after I cleaned it up, but still tough. 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. Tighten the tension screw with a screwdriver to tighten the chain around the bar. Uninstall the spark arrestor and unblock it using a brush, but you can also replace it for efficiency. 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. Low pressure, 20 to 30 pounds is all you need. That is what was told to me by the area distributor technician, 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. The purpose of a choke in a chainsaw is to make cold starting more effortless, but if you do not use it properly. If it has damaged parts, replace it with a carburetor kit that fits your chainsaw model. I bought 2 032 Stihl saws at auction that pulled very hard. When the oil pimp or oiler is faulty, it will reduce the chainsaws performance and power. By getting your pool ready for the winter, you can make sure it will be ready to use in the spring. Sparkplug was correct but I think it was a little flooded. Wipe off the excess fuel from the spark plug with a clean rag. Remove the spark plugs and the e-clips attached to the sprocket on the engine shaft. By checking & repairing/replacing these, you can fix the issue. Because of an absence of lubrication, the chain saw system becomes brittle, resulting in excessive compression of the chain saw mechanism. I'm an arborist by profession & a blogger by passion. Over time, soot from the engine clogs up the spark arrestor causing the chainsaw to stall. This can lead to serious injuries, including cuts and amputations. Check the choke of the chainsaws engine and make sure it is completely closed. As a result, normal compression settings will change based on the kind of chainsaw machine you are using. Find the low speed, high speed, and idle speed screws near the carburetor, start the engine and allow it to warm up. Compression gauges are not always accurate and different engines will provide different results. You never try to get it to run with the choke on. Then, use a wire brush to remove all the carbon build-up from the cylinder and piston. check the cylinder & piston for carbon build-up, how much compression Does the chainsaw Engine need, How To Reset Echo 58-Volt Battery Charger. Most times, when the Stihl chainsaw stops working, it is never a complete breakdown. Most fuels nowadays are a blend of ethanol which attracts moisture and speeds up the rotting process. Try blowing the crankcase out with air. If you find the brake drum moving, you must replace the needle bearing. 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. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. If it is not physically damaged, clean it with clean gasoline and a rag. If oil is in there it is what makes the engine feel like it is almost locked up. Sometimes, the ignition rope is frayed or stuck inside the starter housing. A clogged carburetor wont allow fuel into the engine, preventing it from starting. Check if the wires are damaged or broken and replace them if necessary. A chainsaw with no spark will shut down suddenly or not start at all. Pull trigger and set full choke. You will notice the compression less. The first step is to remove the cover that covers the spark plug on your chainsaw. Starting fluid will make the fuel more combustible and makes the process of clearing out the combustion chamber much quicker. A smaller gap will cause a weak spark and poor ignition of the engine, while a wider gap will not bring out any spark. It runs good after I get it started. "@type": "ImageObject", A chainsaw engine generates this compression through the explosion of the fuel in the combustion chamber and the movement of the crankcase. "@type": "WebPage", 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 engine has a different capacity depending upon its motor power. 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! 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. If this does not fix the issue, it may be necessary to replace the whole starting rope system with another one. 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. Your ignition rope must be intact properly with the pulley to work correctly. Other than that, you should also use the correct spark plugs for your chainsaw. Afterward, the beginning rope is pulled repeatedly until the gauge comes to a full stop on its own. If you suspect a compression issue, seek professional help as compression repairs can be complicated. Replace with a new starter house Problem 2: Damaged pulley system Solution: 1. If that is true, I'd suspect that the timing is off and why it's ripping the cord from your hand. If the compression is not produced in the engine at an appropriate level, it will not be able to convert fuel into energy. Lift the bars nose and tighten the nuts on the sidebar to secure the sidebar and guide bar in place. Pull the rope until it starts. Can anyone make a suggestion. OEM GOOD USED STIHL 048AV CHAINSAW SHORT BLOCK ENGINE 120 PSI COMPRESSION. 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?? Loosen the nuts holding the clutch cover and disconnect the chain shroud and remove the oil plate. Similarly, a 4-stroke engine needs 2 times more compression than a 2-stroke engine, around 180-210 PSI. Stihl oil has been used. 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!!! Fuel filters trap dirt and contaminants from the fuel to prevent them from damaging the engine. Replace the spark plug with a new identical. Activate the chain brake and then place the chainsaw on a flat, leveled surface. Get you some Sea Foam at the local auto parts store. A large engine has a huge capacity in its motor. Starter fluids spray can help in those conditions Before pulling shoulder. That is the nature of a 250. Temperature Of The Engine A heavy-duty engine gets hot faster and works better than a cold engine. It would give you rusted bearings. Hold the tip of the blade and adjust the tension of the chain correctly. Wash the dirty filter with a non-abrasive detergent and water. Unscrew the spark plug using a ratchet and screw the compression gauge in its place. If oil is in there it is what makes the engine feel like it is almost locked up. You may also notice that the chain saw loses power during operation. There might be a small stone or thing that is stuck inside the starter and causes the rope not to retract. "@id":"https://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=toolt&th=435118", Each chainsaw has a different level of compression. In other words, the problem is in the trigger itself, not a. carb adjustment screw. 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. First thing I'd check is the pull start 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. I have a MS250 that has come up on compression since new. Ron Cook. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. The carburetor sucks fuel from the tank, mixes it with the right amount of air, and pushes the mixture into the combustion chamber. Loosen the nuts and bolts clockwise and then pull out the oil pump gently. If the coil is faulty, there will be no spark to start the engine and run the chainsaw. 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. Try it, it may just do the trick! Help, can't pull start Stihl MS250 chainsaw, too much compression. water will not dissolve carbon; it is far too hard to be effected. Don't put water into the 2 stroke. A drastic and frankly silly thing to do though . Also take the spark plug out and do the same. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. A lot of variables might contribute to excessive compression while using a chainsaw. Sounds flooded, or maybe wrong sparkplug? 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've seen it happen a couple times. The ignition coil transmits electricity to the spark plug to create a spark that ignites the engine. in the. Mar 22, 2017. Make sure the gap is according to the specifications of your chainsaws engine. That is what was told to me by the area distributor technician That is the nature of a 250. Would not be afraid to do it to a 4, 6, or V-8. 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. $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 If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . No carbon on top or on roof of cylinder. Take off the muffler or the carb to get access. Oct 24, 2011 / Chainsaw excessive compression #1 . 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. Any chance is it hydro locking because of gas? Remove ignition coil and muffler. Cleaned air filters and both were very dirty. Not sure it would accomplish anything on a 2-stroke chain saw engine. 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. Save my name, email, and website in this browser for the next time I comment. Unscrew the clutch assembly on top of the oil pump. 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. This could be understood by reading the further explanation below. 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. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. Change in temperatures and dirt will cause clogging anywhere the oil passes, and this can prevent the oil from spread all across the bar. It runs good after I get it started. But it was stolen along with other tools around 1990. It is significantly tougher to pull over than an 024 or the new 241. Dust particles in the air mix with the lubricating oil and clog up the air filter, therefore, preventing sufficient air from getting into the engine. If you recently refueled your Stihl chainsaw, stale gas can be a reason why it wont start. Manage Settings #1. 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. Free shipping. Carboned rings will decrease not increase compression. It is, therefore, necessary to determine if the problem has been remedied by adding fresh fuel. Are you sure the starter rope isn't a little too short? Do that to the starter side when you're looking at the starter assy. "url": "https://www.yesterdaystractors.com/graphics/smllogo.png", Start new topic; Recommended Posts. Low pressure, 20 to 30 pounds is all you need. Insert the air filter and the spark plug, reconnect the spark plug wire, and close the opening. It was metering lever. I have a MS250 that has come up on compression since new. Winterizing a pool is an important step in maintaining the longevity and health of your pool. }. Make sure it is snug but can also move freely by hand. I have plenty of engines with REALLY low compression that I'll be glad to swap him. A drastic and frankly silly thing to do though . "@context":"https://schema.org", When you start the chainsaw, it triggers the worm drive to engage the oiler to send oil through a port that releases onto the bar. 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. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. Would not be afraid to do it to a 4, 6, or V-8. 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. 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. 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. Of all the Stihl saws, the MS250 is the toughest to start in relation to it's size. Dont substitute it with. Do that to the starter side when you're looking at the starter assy. I used to have a Homelite that would do that if I left gas in it. You can unclog the carburetor if the clog is minor. You're familiar with how to start a stihl yes? It very often kicks back and pulls the starter rope back in. 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. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. Thus far, you have learned how to diagnose most problems with the Stihl chainsaw and how to fix the issues. "@type": "Organization", What is the minimum compression for my STIHL chainsaw? Locate the spark plug from the top of the engine underneath the chain brake handle. Reddit and its partners use cookies and similar technologies to provide you with a better experience. 24" is what I've got on mine, but it can handle a bigger bar. or Best . Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. I would never put water in it! Carboned rings will decrease not increase compression. Most of the time, the chainsaw cord became hard to pull because of the Starter Housing. The saw is about 2 years old, light use. I've done it to high hour Kohler engines many times. "publisher": { Would have to remove spark plug and rinse cylinder with gas to be able to start. If it has to do with small engines, it's welcome here. Hello D beatty, Here is a link for two stroke engine air cycle, Guido. I would suspect the timing is too early. When you are doing a cold start, push the choke lever to the warm start when the engine starts to run. If it does maybe it is plugged. NelsGarage will share the knowledge Ive gathered about different tools and give you tips to accomplish your DIY projects faster. It is like there is too much compression. As the starter, spring plays a vital role in running starter assembly smoothly. If the chainsaw is too much compression, it may be difficult to start. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright . 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. If it does maybe it is plugged. } It's also possible the piston or cylinder are scored or carboned up. If that doesnt work, try gently tapping on the side of the bulb with a screwdriver or other tool. Pull trigger and set full choke. "dateModified": "2017-08-17", Get you some Sea Foam at the local auto parts store. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. If you do not replace the starter spring on time, it will cause you to replace the whole starter assembly. 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. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Make sure it fits snug. Check for clogging around the bar oil. "@type": "ImageObject", 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. An example of data being processed may be a unique identifier stored in a cookie.
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