"publisher": { Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. Sometimes the spring stops working correctly due to overuse and becomes brittle. Also check the air filters and make sure they are clean. It is effortless to check the starter spring; pull the ignition rope. Stihl is a leading manufacturer of chainsaws and other handheld outdoor and landscaping power tools. External air goes into the engine through the air filter to cool down the chainsaw engine and also mix with the fuel to ignite and run the saw. 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. There is no carbon build up and all looks like new. The compression limit should also be doubled if the engine capacity is 100 CC. If you notice the treads are worn, which prevents the device from pumping, replace it with a new one. You need to pull the exhaust to check that. The key on the flywheel is in place and not sheered. Make sure it's greased and the bushings are good. A drastic and frankly silly thing to do though . I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. This article will help you fix the most commonly reported problems of a Stihl chainsaw. } The owner is complaining of hard to pull start. It is harmful to your machine to use old fuel. Unscrew the spark plug wrench using a spark plug from the engine. In other words, the problem is in the trigger itself, not a. carb adjustment screw. If it is not physically damaged, clean it with clean gasoline and a rag. After that, using a ratchet, remove the spark plug from the engine. I would suspect the timing is too early. I've done it to high hour Kohler engines many times. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. If you do not replace the starter spring on time, it will cause you to replace the whole starter assembly. Your ignition rope must be intact properly with the pulley to work correctly. How Much Compression Should a Chainsaw Have. pulls with little resistance, similar to my farm boss. If that doesnt work, try gently tapping on the side of the bulb with a screwdriver or other tool. link to Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. I have a MS250 that has come up on compression since new. Check for clogged shafts and jets, clogged carburetor, damaged valves, stuck levers, and damaged or warped diaphragms, all of which can interfere with the fueling process. It is like there is too much compression. "@type": "Organization", I used to have a Homelite that would do that if I left gas in it. Has anyone ever seen a stock MS250 or any stock stihl with 190psi of compression? First, remove the cylinder and piston from the chainsaw. On a 2 stroke the water would go into the crank case first and pool up. Press J to jump to the feed. 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. 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. Has someone invented a new kind of two stroke motor? It's also possible the piston or cylinder are scored or carboned up. My one and only MS250 was a kicker to start it but that was the only problem. Most times, when the Stihl chainsaw stops working, it is never a complete breakdown. Hope this helps. Get you some Sea Foam at the local auto parts store. }, However, you still have to confirm the size of the gap before installing. Remove ignition coil and muffler. Are you sure the starter rope isn't a little too short? link to Indoor Fly Traps: 5 Things You Didn't Know About Indoor Fly Traps. If the coil is faulty, there will be no spark to start the engine and run the chainsaw. $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 Wipe off any flammable fluid from the metal surface of the engine with a clean rag. To ensure correct functioning and to prevent excessive compression, you might have to repair worn-out parts with new ones. You have an option to either pull off the starter and clean it or look for an ideal replacement for your starter house. If the air filter is too clogged, you should replace it. It may not display this or other websites correctly. The exhaust side of the piston is a warm gold. I bought 2 032 Stihl saws at auction that pulled very hard. ", Also, remove the muffler and check for carbon buildup. Get it ported and it brings it to another level. That model is extremely easy to flood. I think that's what I'd do. The Stihl 066 chainsaw uses the same type of engine most gasoline-powered yard tools use, a two-cycle combustion engine. The excess gas can be cleared simply by removing the plug and operating the starter a few times. Temperature Of The Engine A heavy-duty engine gets hot faster and works better than a cold engine. Soaking in water will do nothing but rust things up . Clean any mildly dirty parts and replace all the damaged parts. What are the numbers on your sparkplug? 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. Would have to remove spark plug and rinse cylinder with gas to be able to start. I would suspect the timing is too early. Remove the sprocket and the washer. 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. "url": "https://www.yesterdaystractors.com/graphics/smllogo.png", The excess gas can be cleared simply by removing the plug and operating the starter a few times. Stihl chainsaw compression test Joe_Power Jun 2, 2015 Not open for further replies. I luv my 064. Turn the engine to get under the piston and blow the crankcase out. If it does maybe it is plugged. If you regularly use the chainsaw, then there might be the possibility that your starter spring breaks off. Quoting Removed, click Modern View to see Don't put water in the saw-ever. There is no idle when I release the trigger. 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. This is because your oil is not rated to get to work at a low temperature. 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. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. The starter assembly often fails to rotate due to a weak connection between the pulley and the ignition rope. "width": 200, The chainsaw motor engine capacity can range from 30CC and 50CC to 150 CC. Turn the idle speed clockwise until the saw idles and chain turns, and then make a one-fourth counterclockwise turn. Don't put water into the 2 stroke. Cleaned air filters and both were very dirty. Another big issue that causes too much high compression is the lack of oil in the starter system. Here is a link for two stroke engine air cycle. More information can be found on this page. I would never put water in it! No compression when pulling start rope read more Expert Stihl ms 180 chain saw, new carb, spark plug, compression stihl ms 180 chain saw, new carb, spark plug, compression 110, new gas, still won't start what next, piston is not scored. I've done it to high hour Kohler engines many times. Choke cannot be used even when engine cold, or flooding occurs. The saw feels good in my hands and its got a surprising amount of power. 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. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. I love to write about chainsaw for homeowners and professionals. Too much hot or cold engine does not work or even start to produce vacuum pressure inside engine. what and or where is the metering lever.? Therefore, most people will wonder why the chainsaw has too much compression. JavaScript is disabled. Try taking it out, Then holding the trigger while you pull fast. 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. The end of the tester must protrude exact the same volume into the cylinder as the spark plug or the reading will be wrong. The chain clutch might be, Read More Cordless Chainsaw Wont StartContinue, The most common reason is simply the wrong battery. Does the saw have a compression release? If I drop start it I can pull it through 1 compression stroke. Hello D beatty, Here is a link for two stroke engine air cycle, Guido. Fine adjust everything and both saws start Normal now. 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. In addition, you should check the muffler and piston while youre at this point. Hello. You never try to get it to run with the choke on. If the reading is below or above the required range, then your ignition coil requires changing. Im Nelson, a DIY enthusiast with a bottomless can-do attitude. If cleaning does not help release oil onto the bar, the pump may be damaged and require replacing. Make sure the keyway is lined up correctly and tighten the nut down good and tight. Wipe off any dirt and debris and check for any signs of damages. Use a brush and cloth to clean and remove any dirt, mud, or debris that can interfere with the controlsclean around the chain brake lever, the air filter housing, and the filter. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. For a better experience, please enable JavaScript in your browser before proceeding. Suitable Replacement Stihl MS 250 C Compression Release Parts When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. }, Try it, it may just do the trick! 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. Also take the spark plug out and do the same. after that I'd be looking at crank bearings. That is what was told to me by the area distributor technician Check for side play in the crankshaft. I agree the saw runs great, but when your helping old men with ideas of their own its hard to say I wish I had 190 pounds of compression. The purpose of a choke in a chainsaw is to make cold starting more effortless, but if you do not use it properly. If oil is in there it is what makes the engine feel like it is almost locked up. Make sure it fits snug. 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. A 250 is a joy to pull start Compared to my 200+ compression ported saws with no decomp. A 250 has a fair amount of compression for a smaller saw but not that bad. I bought 2 032 Stihl saws at auction that pulled very hard. Chainsaws are very powerful tools, and if theyre not properly maintained, they can easily overcompress the chain, which can cause it to break. Don't know what to do at this point. 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. 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. Pull the recoil off and check for binding Pull rope or starter pawls misaligned. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. Cleaned air filters and both were very dirty. You can also quickly fix this anomaly by ensuring a proper troubleshooting of the pulley compartment to find damages. I'm hearing thats just the nature of the beast. If a chainsaw has a 2 stroke engine, then the maximum compression it requires is 110-130 PSI. 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'm also going to double check it has the correct resistor type spark plug. A chainsaw is going to be exposed to oxidation over time, but you can at least limit the process by storing your chainsaw well. A 50CC engine needs 150 PSI compression. 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. in the, All Rights Reserved. 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. Starting fluid will make the fuel more combustible and makes the process of clearing out the combustion chamber much quicker. ", A clear sign that you may have a chainsaw engine is when you smell gas while starting it. 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. 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! no, afraid I don't have equipment to test. }, Too much carbon will do that, check the piston top and combustion chamber. Carboned rings will decrease not increase compression. It is a prevalent issue and can be fixed and detected easily without consulting a mechanic. Once the 250 is running, its fine. I've been working on a Stihl 026 chainsaw that John found, and it is very hard to crank. 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. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. Final step: removing the old spark plug and installing the new one. First, remove the spark plug from the chainsaw. I've got four other Stihl saws here, an 029, 036Pro, 015L, and an MS200T, only the 36Pro pulls this hard and only if I don't use the decomp button. It would give you rusted bearings. I hope my epic guides will help you to choose,buy and maintain chainsaw. Any help out thereEGBinOR Get you some Sea Foam at the local auto parts store. It works when cold-starting the engine, when the engine is idle and when the engine is open. Try it, it may just do the trick! If A two cycle engine gets flooded BADLY, oil can separate from the gas mix, accumulate in the crankcase and creates an hydrostatc lock. John Deere and its logos are the registered trademarks of the John Deere Corporation. It's an older saw I bought at a garage sale. Check for any cracks and damages and replace if necessary. After initial pull on rope (which feels like vapor lock on cylinder), saw will start on second or third pull. If not I'm honestly kinda stumped. Find the low speed, high speed, and idle speed screws near the carburetor, start the engine and allow it to warm up. With the choke engaged, pull the starting rope several times again, and the chain saw should start on the third pull. Remove the air filter, wash it with detergent and water and scrub off the dirt with a brush. Didnt somehow get straight oil in the cylinder did you? after that I'd be looking at crank bearings. Make sure it is snug but can also move freely by hand. The other reason might be the use of the wrong type of oil for the climate. Remove the entire carburetor and clean it. Once youve done that, reassemble the chainsaw, which should work properly again. 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. 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. A drastic and frankly silly thing to do though . Loosen the nuts holding the clutch cover and disconnect the chain shroud and remove the oil plate. 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. Neighbor brought me his Stihl MS250 complaining that it tries to pull his arm from socket when starting. 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. "name": "Yesterday's Tractor Co.", As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. It's also possible the piston or cylinder are scored or carboned up. It was metering lever. "@type": "ImageObject", Over time or when using the wrong fuel, the fuel filter becomes too clogged and restricts fuel flow, killing the engine shortly after starting. I;ve read somewhere to put water? An engine is fit on the rear side of a chainsaw. Pour starting fluid into the carburetor and crank the engine several times. 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. It is, therefore, necessary to determine if the problem has been remedied by adding fresh fuel. Check if the wires are damaged or broken and replace them if necessary. Versions MS 260, Bar length 37cm, RSC We got rid of both of those useless things . 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. "logo": { "width": 200, If it is hard to pull, then check how the spring is performing. Over time, soot from the engine clogs up the spark arrestor causing the chainsaw to stall. Also take the spark plug out and do the same. The ideal pressure range of the Stihl chainsaw is between 90 and 110 psi. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. Other than that, you should also use the correct spark plugs for your chainsaw. 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. Other than damaged parts, using the choke position to start a warm saw often causes a flooded engine. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. 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 have plenty of engines with REALLY low compression that I'll be glad to swap him. }, This compression converts fuel (any source) into the potential energy in the engine to start it. If any of these components are worn or broken, the chain saw wont start even with fuel. It is possible however to flood a two stroke which can cause the plug to fowl. Blup throttle to bring it down to idle. So, in our suggestion, one of the first things to check while feeling high compression is the starter spring. 24" is what I've got on mine, but it can handle a bigger bar. "@type": "ImageObject", Check the saws exterior for loose bolts, nuts, and screws and tighten them with an adjustable wrench or screwdriver. Admitted Woodaholic. Each chainsaw has a different level of compression. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. 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!!! JavaScript is disabled. Locate the tension adjustment screws to the side of the chainsaw guide bar. Trying to rotate the chain while a huge piece of wood is . Your chainsaws compressive strength is measured with the use of a screw-in gauge. I bought 2 032 Stihl saws at auction that pulled very hard.
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