A clear sign that you may have a chainsaw engine is when you smell gas while starting it. Unscrew the spark plug wrench using a spark plug from the engine. Starter fluids spray can help in those conditions Before pulling shoulder. When you are doing a cold start, push the choke lever to the warm start when the engine starts to run. There is no carbon build up and all looks like new. It would give you rusted 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. 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. If it is flooded that should clear it up. My one and only MS250 was a kicker to start it but that was the only problem. This increased distance will cause the chain to keep coming out of the guiding bar with the vibrating saw. It would give you rusted bearings. The recoil starter in a chainsaw is a start mechanism that allows you to pull the rope. 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. OEM GOOD USED STIHL 048AV CHAINSAW SHORT BLOCK ENGINE 120 PSI COMPRESSION. 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. 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! By getting your pool ready for the winter, you can make sure it will be ready to use in the spring. Why is the Garage Door Opener Light Not Working? 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. Reassemble the chainsaw, refill the fuel tank, crank the engine and check for oil along the bar. The extra effort to pull the saw is probably due to carbon build up on the piston crown and combustion chamber. The compression limit should also be doubled if the engine capacity is 100 CC. Stihl MS290 MS390 MS310 Chainsaw Has Oil Tank Engine Housing Assembly OEM/ Bin G . I'm hearing thats just the nature of the beast. Runs well, except it. Thanks. An excessive amount of compression in your chainsaws starting rope could also be indicated by the beginning rope failing to draw. All it needs is a few inches missing and it will pull too hard like the compression is too high. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. You are misunderstanding WHY water is put into carboned up engines. How Much Compression Should a Chainsaw Have. If you do not replace the starter spring on time, it will cause you to replace the whole starter assembly. I believe it was flooded, but I didn't think that little bit of fuel would make it that hard to pull but I guess so since it can't compress! Therefore, most people will wonder why the chainsaw has too much compression. "height": 57 How Much Does it Cost to Install a Garage Door Opener? Remove the air filter, wash it with detergent and water and scrub off the dirt with a brush. The purpose of a choke in a chainsaw is to make cold starting more effortless, but if you do not use it properly. Also check the air filters and make sure they are clean. It is usual for the chainsaw chains to come off with continued use, but there is usually an underlying cause when its too repetitive. Save my name, email, and website in this browser for the next time I comment. "dateModified": "2017-08-17", Stihl oil has been used. JavaScript is disabled. When there is too much fuel, it will not ignite, and the engine wont start. 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. This article will help you fix the most commonly reported problems of a Stihl chainsaw. in the cylinder overnight because the rings are cerboned up? This is because your oil is not rated to get to work at a low temperature. In a similar vein, if the wrong kind of oil is used, the compression may be increased. 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. $20.00 shipping. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. The switch might be damaged or the motor is burned out. If not I'm honestly kinda stumped. Not sure it would accomplish anything on a 2-stroke chain saw engine. Manage Settings 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. We got rid of both of those useless things . Its just that its nearly impossible to pull. What are the numbers on your sparkplug? water will not dissolve carbon; it is far too hard to be effected. I hope my epic guides will help you to choose,buy and maintain chainsaw. Yeah, I must have flooded it as I was working on it. 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. Not sure it would accomplish anything on a 2-stroke chain saw engine. Stihl MS192T Chainsaw Fuel Oil Tank Engine Housing Assembly OEM. The starter assembly often fails to rotate due to a weak connection between the pulley and the ignition rope. When starting the motor when its col, you should engage the choke position to increase fuel intake and reduce air to allow the engine to start. Remove the right side cover, bar, and chain. It uncoils, tightens the spring, engages the clutch to start the engine. I'm an arborist by profession & a blogger by passion. I bought 2 032 Stihl saws at auction that pulled very hard. Too much hot or cold engine does not work or even start to produce vacuum pressure inside engine. A faulty spark plug will have carbon, dirt, and oil blocking the insulator nose, preventing it from firing consistently. If your chainsaws cylinder and piston have a lot of carbon build-up, it can cause the chainsaw to have high compression. Check the spark plug and replace it if needed. When there is no air for the spark to ignite, the chainsaw will start and then die after a short while. Soaking in water will do nothing but rust things up . or Best Offer. Guido Quoting Removed, click Modern View to see What?? I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. Repair or replace the damaged part 2. Thanks! 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. So, in our suggestion, one of the first things to check while feeling high compression is the starter spring. Check the chainsaws fuel if you have not used the tool for a while. 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. Remove the sprocket and the washer. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. How big a fella are ya? A drastic and frankly silly thing to do though . Youll need to clean the cylinder and piston to fix this thoroughly. 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. Yes I tried that last time and it did help some. First thing I'd check is the pull start assy. Pull the rope until it starts. I have a MS250 that has come up on compression since new. Keep in mind that good maintenance and storage will reduce breakdowns and maintain your tools performance throughout its lifetime. Get it ported and it brings it to another level. Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. water will not dissolve carbon; it is far too hard to be effected. If it is hard to pull, then check how the spring is performing. You have an option to either pull off the starter and clean it or look for an ideal replacement for your starter house. To fix this problem, turn off the chain saw and let it sit for about 30 minutes to allow the excess gas to evaporate. 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?? Ok folks, I'm stumped. I would suspect the timing is too early. Confirm the spark plug gap, check and adjust with a feeler gauge or gaping tool. When the motor warms up after about a minute, turn on the choke position. Even though it was purchased "brand new" I'm not so sure. Use a can of carb cleaner sprayed into the breather/filter assembly. Temperature Of The Engine A heavy-duty engine gets hot faster and works better than a cold engine. If you recently refueled your Stihl chainsaw, stale gas can be a reason why it wont start. Make sure there is oil in the engine. It is effortless to check the starter spring; pull the ignition rope. I would never put water in it! "description":"Discussion of Chainsaw has too much compression in the Tool Talk forum followed by comments. You should also make sure the new gas you use is appropriate for the chainsaw. The Housing is the outer cover of the starter, and if it is damaged, your chainsaw suffers stiffness during a pull. "interactionStatistic": { The ideal pressure range of the Stihl chainsaw is between 90 and 110 psi. Thus far, you have learned how to diagnose most problems with the Stihl chainsaw and how to fix the issues. or Best Offer. I hook up a drill to the nut on the clutch and start hard starting saws that way . If the reading is below or above the required range, then your ignition coil requires changing. 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. in the. I've seen a 20psi drop with the wrong type of gauge to be pretty common. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. Make sure it's greased and the bushings are good. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. 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. No compression when pulling start rope. On a 2 stroke the water would go into the crank case first and pool up. Free shipping. 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!!! I;ve read somewhere to put water? As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. When this pressure, or compression, is too low or high, the chainsaw . Here is how to troubleshoot a malfunctioning spark plug. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. If the spark plug is working correctly and you have good fuel, there still has to be enough fuel in the combustion chamber for the engine to start correctly. If oil is in there it is what makes the engine feel like it is almost locked up. "width": 200, Fuel filters trap dirt and contaminants from the fuel to prevent them from damaging the engine. If it is too damaged, you should replace it. Replace the fuel filters instead of cleaning them as they are pretty affordable and easy to install too. If oil is in there it is what makes the engine feel like it is almost locked up. i have a ms 250. Would have to remove spark plug and rinse cylinder with gas to be able to start. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. $75.00. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. However, these moving parts, to stay moving, require a substantial amount of compression. If a chainsaw has a 2 stroke engine, then the maximum compression it requires is 110-130 PSI. "@type": "Organization", Do that to the starter side when you're looking at the starter assy. }, Recognised as a leading saw in the forestry industry, it is available in guide bar lengths 13"/32cm to 18"/45cm. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. Trying to rotate the chain while a huge piece of wood is . 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. 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. If it is the right sparkplug and not flooded, I would maybe buy a different saw with easy start. I love to write about chainsaw for homeowners and professionals. Continue with Recommended Cookies. Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. Soaking in water will do nothing but rust things up . The exhaust is black but no build up. Stihl 251 chainsaw. 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. Thank you for the responses. 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. In this case fixing or repairing is required or worst replacing the engine all at once. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. Check the chain oiler and ensure it is functional. Sometimes it kicks and the rope pulls right out of my hand. People sometimes try to cut down a tree that is too big for their chainsaw. Pull the recoil off and check for binding Pull rope or starter pawls misaligned. He checked.it clearly says that in the OP. It would give you rusted bearings. Get you some Sea Foam at the local auto parts store. Soaking in water will do nothing but rust things up . I;ve read somewhere to put water? I hope you understand the problems why your chainsaw is hard to pull. There is no idle when I release the trigger. It is possible however to flood a two stroke which can cause the plug to fowl. Being new carb, wasn't looking that direction educate a non mechanic. What worked with my MS440 kicking problem should also work with that one. Try blowing the crankcase out with air. If any of these components are worn or broken, the chain saw wont start even with fuel. Ask him if he's drop-starting it. It's from not pulling hard enough. Hope this helps. Sometimes, the ignition rope is frayed or stuck inside the starter housing. 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. Always change the spark plug after 100 operating hours of the chainsaw to avoid engine problems. I missed the "no carbon". Make sure the gap is according to the specifications of your chainsaws engine. Cleaned air filters and both were very dirty. "@type":"DiscussionForumPosting", Stihl recommends using 89 octane gasoline without ethanol, and the gas should not contain more than 10% ethanol. "datePublished": "2017-08-17", The flywheel is loose? 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 Pull trigger and set full choke. It is best to put a new plug in after clearing. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. Use recommedend chain oil lubricant. A clogged carburetor wont allow fuel into the engine, preventing it from starting. Admitted Woodaholic. 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. Turn the engine to get under the piston and blow the crankcase out. 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. Poke the oil feed hole with a 16-gauge wire to unclog it until it slides through the hole smoothly. Im Nelson, a DIY enthusiast with a bottomless can-do attitude. Wipe off any dirt and debris and check for any signs of damages. If anything prevents the right amount of fuel into the combustion chamber, the chainsaw wont start. Hello. 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. Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. Would have to remove spark plug and rinse cylinder with gas to be able to start. 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. Carbon buildup is yet another important factor in the increasing compression experienced by chain saws over time. A chainsaw with no spark will shut down suddenly or not start at all. Advanced arborist chainsaw with a top handle and STIHL M-Tronic technology. It had a compression release, and it started and ran well. 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.. 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. After that, using a ratchet, remove the spark plug from the engine. 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. Try it, it may just do the trick! Find the low speed, high speed, and idle speed screws near the carburetor, start the engine and allow it to warm up. Oct 7, 2019 / Minimum compression for a Stihl 2 cycle #3 the actual numbers will vary from one tool to another Getting accurate numbers without special tools is quite difficult because of the small volumes. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. Also take the spark plug out and do the same. Small Engine Technician If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright . 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. Winterizing a pool is an important step in maintaining the longevity and health of your pool. It takes a Bosch WSR6F or NGK BPMR7A. Pull trigger and set full choke. Make sure the crank taper is clean and the flywheel taper also. 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. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. I got it going. "@type": "ImageObject", The manual for this model, and the parts breakdown, show a compression release valve. I would never put water in it! 3 9 9 comments Best Add a Comment Revolutionary-Act469 2 yr. ago Doesn't pull at all or just hard to pull. This Indoor Fly Traps: 5 Things You Didn't Know About Indoor Fly Traps. The owner is complaining of hard to pull start. When it comes to compression values, those between 90 and 110 psi are deemed to be acceptable. I used to have a Homelite that would do that if I left gas in it. Uninstall the spark arrestor and unblock it using a brush, but you can also replace it for efficiency. }, A chainsaw is going to be exposed to oxidation over time, but you can at least limit the process by storing your chainsaw well. By checking & repairing/replacing these, you can fix the issue. Being in the cutting services for more than 10 years, I know a thing or two about 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 There are sprays (power tune) for removing carbon, but I doubt if that's your problem. Hello D beatty, Here is a link for two stroke engine air cycle, Guido. I would suspect the timing is too early. Press question mark to learn the rest of the keyboard shortcuts. You never try to get it to run with the choke on. A heavy-duty engine gets hot faster and works better than a cold engine. 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. Required fields are marked *. You can check the compression by pulling the spark plug out and holding it in your hand. When the oil pimp or oiler is faulty, it will reduce the chainsaws performance and 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! Does the saw have a compression release? I;ve read somewhere to put water? If the chainsaw is too little compression, it may start easily but will not run smoothly. If it looks physically fine after cleaning it and you havent changed it in a few seasons, you should still replace it. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. If there is any damage to the pulley at any stage, it will cause High Compression or stiffness during a pull.. I got it started. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. $99.95. If it does maybe it is plugged. This is because each machine is made differently and has various needs. Make sure it's greased and the bushings are good. NelsGarage will share the knowledge Ive gathered about different tools and give you tips to accomplish your DIY projects faster. Register today and take advantage of membership benefits. Check for broken teeth on the chain and replace them if necessary. Generally covering everything under 25 HP. Therefore, it does not need any compression rate to start. You are using an out of date browser. So, replacing the ignition rope is a better option to keep everything working smoothly without any damage. I get it going now and its easier but its still a bear. Now, how much compression the engine of a chainsaw needs depends upon its motor capacity and temperature. The vibration of the tool during use can run some fasteners loose, preventing it from starting again. The owner is complaining of hard to pull start. Another big issue that causes too much high compression is the lack of oil in the starter system. "publisher": { The power of the motor of an engine is measured in its capacity. If you still have questions regarding high chainsaw compression, you can discuss them in the comments. Back to top derwen1959 Long Time User Stihl MS 250 Chain Saw: The pull start will barely move the flywheel. I think that's what I'd do. 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. Maybe the piston is hitting it. Register today and take advantage of membership benefits. 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. That is the nature of a 250. This compression converts fuel (any source) into the potential energy in the engine to start it. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. Get you some Sea Foam at the local auto parts store. "text": "My chainsaw has gotten very hard to pull the rope. I have plenty of engines with REALLY low compression that I'll be glad to swap him. Then Google "decarb". If the chainsaw is too much compression, it may be difficult to start. "@id": "https://www.yesterdaystractors.com/" Disengage the chain brake, turn on the ignition switch and install the new spark plug into the rubber connector. Ron Cook. Below are the reasons the chain keeps coming loose and how to fix it. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. Getting these problems resolved is a rather straightforward process. I have had the cylinder off. Here is a link for two stroke engine air cycle. Chainsaw Parts. Detailed, well-researched, and accurate home and garden information presented in an understandable format is our primary goal. } You need to pull the exhaust to check that. Some of the contributing reasons include a full tank of oil, carbon buildup on the exhaust system, and malfunctioning spark plugs. However, if I push downward on the trigger button, it slows down to. Check the saws exterior for loose bolts, nuts, and screws and tighten them with an adjustable wrench or screwdriver. Because of an absence of lubrication, the chain saw system becomes brittle, resulting in excessive compression of the chain saw mechanism. 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. I've been working on a Stihl 026 chainsaw that John found, and it is very hard to crank. The carburetor sucks fuel from the tank, mixes it with the right amount of air, and pushes the mixture into the combustion chamber. As the starter, spring plays a vital role in running starter assembly smoothly. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. 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 Check the chain tension and adjust it if it is too loose or tight. Press question mark to learn the rest of the keyboard shortcuts. The correct tension of the chainsaw chain should be slightly loose on the guide bar but tight enough that you cant pull the drive links out of the bar to fix the chain tension issues; follow the steps below. Other than damaged parts, using the choke position to start a warm saw often causes a flooded engine. 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. 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.
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