stihl chainsaw too much compression

Insert the air filter and the spark plug, reconnect the spark plug wire, and close the opening. That is what was told to me by the area distributor technician Check for side play in the crankshaft. Activate the chain brake and then place the chainsaw on a flat, leveled surface. I got it started. 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. Yes I tried that last time and it did help some. Remove ignition coil and muffler. What worked with my MS440 kicking problem should also work with that one. anthonyg_ma Original Author 16 years ago Canguy, thnks for the tips! Take better care of your chainsaw and perform regular maintenance according to the manufacturers recommendations to prevent any of these problems. Of all the Stihl saws, the MS250 is the toughest to start in relation to it's size. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. We're all about fixing small engines, from carburetor rebuilds, to crankshaft machining. }, Stihl oil has been used. Other than that, you should also use the correct spark plugs for your chainsaw. Friction is usually the cause of a rope failing to draw when it should. 24" is what I've got on mine, but it can handle a bigger bar. Has someone invented a new kind of two stroke motor? Clean any mildly dirty parts and replace all the damaged parts. When there is no air for the spark to ignite, the chainsaw will start and then die after a short while. If the starter spring is keep working correctly, it will retract the ignition rope. Also check the air filters and make sure they are clean. 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. A chainsaw with no spark will shut down suddenly or not start at all. 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. Wash the dirty filter with a non-abrasive detergent and water. In most cases, a buildup of carbon under the rings presses the rings against the cylinder, culminating in compression of the cylinder. $49.99. Any ideas? Fine adjust everything and both saws start Normal now. You will notice the compression less. The owner is complaining of hard to pull start. STIHL MS 170 Chainsaw (NEW) full pack $295.00 $59.00 shipping Stihl MS170 Chainsaw Motor Fast Free Shipping $75.00 Free shipping or Best Offer Stihl 16 inch bar + Chain for MS170 - MS251 3/8 Pitch .043 Gauge 55 drivers $79.75 $25.45 shipping Only 3 left Stihl MS170 Chainsaw motor OEM Fast/Free Shipping $85.00 Free shipping or Best Offer If it does maybe it is plugged. Get you some Sea Foam at the local auto parts store. I have a MS250 that has come up on compression since new. $20.00 shipping. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. Check the chainsaws fuel if you have not used the tool for a while. "mainEntityOfPage": { How To Fix Chainsaw Battery Charger Blinking Red? 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. It is best to put a new plug in after clearing. Try taking it out, Then holding the trigger while you pull fast. Change in temperatures and dirt will cause clogging anywhere the oil passes, and this can prevent the oil from spread all across the bar. As far as compression, you can usually tell by how the saw pulls when starting it. Disengage the chain brake, turn on the ignition switch and install the new spark plug into the rubber connector. It prevents the carburetor from allowing too much fuel into the combustion chamber. #3. Recognised as a leading saw in the forestry industry, it is available in guide bar lengths 13"/32cm to 18"/45cm. Pull the recoil off and check for binding Pull rope or starter pawls misaligned. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. Check for side play in the crankshaft. For 503552201 Cylinder Compression Plug Package Include: 3 x Cylinder Plug Cylinder Compression Plug However, this will vary by model and compression readings alone are not enough to determine the condition of the engine. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. Fine adjust everything and both saws start Normal now. Remove the sprocket and the washer. When it comes to compression values, those between 90 and 110 psi are deemed to be acceptable. A lot of variables might contribute to excessive compression while using a chainsaw. 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! 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. I think that's what I'd do. Are you sure the starter rope isn't a little too short? Ron Cook. Dont substitute it with. 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. water will not dissolve carbon; it is far too hard to be effected. Stihl MS 250 Chain Saw: The pull start will barely move the flywheel. The manual for this model, and the parts breakdown, show a compression release valve. If oil is in there it is what makes the engine feel like it is almost locked up. Fuel filters trap dirt and contaminants from the fuel to prevent them from damaging the engine. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. No compression when pulling start rope. This could be understood by reading the further explanation below. Try blowing the crankcase out with air. The other reason might be the use of the wrong type of oil for the climate. Every chainsaw requires a different compression level according to its built-up and model number. That model is extremely easy to flood. I have a MS250 that has come up on compression since new. Welcome! Carboned rings will decrease not increase compression. As the chain moves over the bar, it spreads the oil across the moving parts to reduce friction and heat. everything is harder in a tree, not a conclusive test. I can probably find one with at most 65 PSI. We are compensated for referring traffic and business to Amazon and other companies linked to on this site. Quoting Removed, click Modern View to see Don't put water in the saw-ever. Start new topic; Recommended Posts. The power of the motor of an engine is measured in its capacity. Most fuels nowadays are a blend of ethanol which attracts moisture and speeds up the rotting process. 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 pulls with little resistance, similar to my farm boss. The ignition coil transmits electricity to the spark plug to create a spark that ignites the engine. I luv my 064. You need to pull the exhaust to check that. Remove the spark plug with a spark plug wrench and clean it with a brush to remove carbon scoring and dirt. Poke the oil feed hole with a 16-gauge wire to unclog it until it slides through the hole smoothly. If the chainsaw still wont start, it is defective and requires a replacement. Your email address will not be published. A chainsaw engine generates this compression through the explosion of the fuel in the combustion chamber and the movement of the crankcase. A problem in the ignition system is likely to be the culprit when the chainsaw doesnt spark. As a result of using bad fuel or leaving fuel in the chainsaw for a long time, the fuel evaporates and leaves behind a sticky substance that accumulates and clogged the carburetor. The key on the flywheel is in place and not sheered. The engine creates a vacuum pressure inside it. I think that's what I'd do. To fix this problem, turn off the chain saw and let it sit for about 30 minutes to allow the excess gas to evaporate. 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!!! Low pressure, 20 to 30 pounds is all you need. I would never put water in it! Stihl MS290 MS390 MS310 Chainsaw Has Oil Tank Engine Housing Assembly OEM/ Bin G . I think that's what happened, although I didn't think such a small amount could do it. 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. It runs good after I get it started. $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 Register today and take advantage of membership benefits. Stihl chainsaw low compression diagnoses and How To Dave's Small Engines 8.89K subscribers Subscribe 17K views 2 years ago This video shows a Stihl MS310 chainsaw I have apart from low. Replace the fuel filters instead of cleaning them as they are pretty affordable and easy to install too. Don't put water into the 2 stroke. To test the recoil starter, remove it and reposition the spring. Find the low speed, high speed, and idle speed screws near the carburetor, start the engine and allow it to warm up. An example of data being processed may be a unique identifier stored in a cookie. The second thing, Read More Stihl Chainsaw Charger Not WorkingContinue, Your email address will not be published. Every chainsaw engine has a different capacity depending upon its motor power. Make sure the gap is according to the specifications of your chainsaws engine. If it looks physically fine after cleaning it and you havent changed it in a few seasons, you should still replace it. If the compression is too high or too low, the engine wont start. First, remove the cylinder and piston from the chainsaw. It would give you rusted bearings. Make sure it's greased and the bushings are good. Sparkplug was correct but I think it was a little flooded. I changed to synthitic. You have an option to either pull off the starter and clean it or look for an ideal replacement for your starter house. You will notice the compression less. You will notice the compression less. Ok folks, I'm stumped. "@type": "WebPage", If any of these components are worn or broken, the chain saw wont start even with fuel. 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?? When there is too much fuel, it will not ignite, and the engine wont start. Even though it was purchased "brand new" I'm not so sure. A heavy-duty engine gets hot faster and works better than a cold engine. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. 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. Any ideas? Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. Also take the spark plug out and do the same. water will not dissolve carbon; it is far too hard to be effected. "@context":"https://schema.org", Check for broken teeth on the chain and replace them if necessary. Confirm the spark plug gap, check and adjust with a feeler gauge or gaping tool. Would not be afraid to do it to a 4, 6, or V-8. Ron Cook. Carboned rings will decrease not increase compression. Make sure the keyway is lined up correctly and tighten the nut down good and tight. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. I thought all the fuel was out but there was some in the line yet. Pull trigger and set full choke. Any help out thereEGBinOR Get you some Sea Foam at the local auto parts store. It is best to put a new plug in after clearing. 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. The owner is complaining of hard to pull start. It works when cold-starting the engine, when the engine is idle and when the engine is open. Once youve done that, reassemble the chainsaw, which should work properly again. I've done it to high hour Kohler engines many times. To avoid flooding the chainsaw when cold starting, turn the control lever to half choke after the fourth pull and then turn the lever again to the open choke position immediately when the engine starts. Once the 250 is running, its fine. John Deere and its logos are the registered trademarks of the John Deere Corporation. Versions MS 260, Bar length 37cm, RSC Take off the muffler or the carb to get access. This is because your oil is not rated to get to work at a low temperature. OEM GOOD USED STIHL 048AV CHAINSAW SHORT BLOCK ENGINE 120 PSI COMPRESSION. Would not be afraid to do it to a 4, 6, or V-8. For the chainsaw to function appropriately, you must maintain the proper amount of tension on the chain. Low pressure, 20 to 30 pounds is all you need. 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 too damaged, you should replace it. It runs good after I get it started. Rinse the filter and allow it to air dry before reinstalling it. Is the spark plug the correct one for the saw? Don't know what to do at this point. Use an adjustable wrench to loosen the two nuts on both sides of the chainsaw. Press question mark to learn the rest of the keyboard shortcuts. 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. You are using an out of date browser. A reddit for all operators of chainsaws to post experience with tools, pictures of their new saws and old workhorses and any maintenance tips. If the chainsaw is too much compression, it may be difficult to start. A clogged carburetor wont allow fuel into the engine, preventing it from starting. The compression limit should also be doubled if the engine capacity is 100 CC. Once it's removed, you can place a gauge on the place of the spark plug. 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. Hold the tip of the blade and adjust the tension of the chain correctly. 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. Wipe off any dirt and debris and check for any signs of damages. It very often kicks back and pulls the starter rope back in. Yeah, I must have flooded it as I was working on it. . If it is not physically damaged, clean it with clean gasoline and a rag. That is what was told to me by the area distributor technician. It would give you rusted bearings. Any chance is it hydro locking because of gas? Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. Also check the air filters and make sure they are clean. Press J to jump to the feed. The plug should be tight against your thumb. } I used to have a Homelite that would do that if I left gas in it. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . Check the spark plug and replace it if needed. Tighten the tension screw with a screwdriver to tighten the chain around the bar. When the fuel starts to turn stale, it gums up and clogs the carburetor just as it would in an unused lawnmower. I used to have a Homelite that would do that if I left gas in it. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V. My /Sthil 034 is very difficult to start. Check for clogging around the bar oil. check the cylinder & piston for carbon build-up, how much compression Does the chainsaw Engine need, How To Reset Echo 58-Volt Battery Charger. Make sure the crank taper is clean and the flywheel taper also. If you see any unusual movement of spring, then take it in to replace it. When the engine starts running, turn the choke off. 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. Generally the minimum is 110 lbs. read more Vince O. Follow the steps below on how to fix a flooded chainsaw engine. A drastic and frankly silly thing to do though . Then Google "decarb". 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. I've been working on a Stihl 026 chainsaw that John found, and it is very hard to crank. 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. Detailed, well-researched, and accurate home and garden information presented in an understandable format is our primary goal. "publisher": { Free shipping. First, remove the spark plug from the chainsaw. Then, use a wire brush to remove all the carbon build-up from the cylinder and piston. I hope my epic guides will help you to choose,buy and maintain chainsaw. Some of the contributing reasons include a full tank of oil, carbon buildup on the exhaust system, and malfunctioning spark plugs. A drastic and frankly silly thing to do though . Generally covering everything under 25 HP. Similarly, a 4-stroke engine needs 2 times more compression than a 2-stroke engine, around 180-210 PSI. This may sometimes jam your chainsaws rings, causing it to become inoperable. If the reading is below or above the required range, then your ignition coil requires changing. Fine adjust everything and both saws start Normal now. To clean it, drain the fuel, spray some carburetor cleaner and loosen the residue with a small brush. 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. ", Do that to the starter side when you're looking at the starter assy. $75.00. Has someone invented a new kind of two stroke motor? You can follow the steps on how to troubleshoot and revive it when it wont start. For a better experience, please enable JavaScript in your browser before proceeding. Temperature Of The Engine A heavy-duty engine gets hot faster and works better than a cold engine. I would suspect the timing is too early. Im Nelson, a DIY enthusiast with a bottomless can-do attitude. The excess gas can be cleared simply by removing the plug and operating the starter a few times. If your chainsaw doesnt automatically turn it off or you forget, the engine cuts off immediately. A compression gauge is used to measure the compression of a chainsaw which works similarly to the tire gauge. I would suspect the timing is too early. 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. That would have to be some puddle of oil for a MS250 to have a "bar oil leaking in and causing high compression problems" What kind of Stihl oil regular or synthitc, had an 025 years ago that was a real knuckel buster never checked compression but was using regular Stihl oil. water will not dissolve carbon; it is far too hard to be effected. in the, All Rights Reserved. Thanks. no, afraid I don't have equipment to test. I;ve read somewhere to put water? "@type": "Organization", Use a screw wrench to loosen the nuts on the guide bar side panel to give you room to adjust the chain. "name": "Egbinor" Too much carbon will do that, check the piston top and combustion chamber. Over time, soot from the engine clogs up the spark arrestor causing the chainsaw to stall. I have had the cylinder off. "@type":"DiscussionForumPosting", lol. Don't know what to do at this point. Now, how much compression the engine of a chainsaw needs depends upon its motor capacity and temperature. John Deere and its logos are the registered trademarks of the John Deere Corporation. On a 2 stroke the water would go into the crank case first and pool up. Would not be afraid to do it to a 4, 6, or V-8. In this case fixing or repairing is required or worst replacing the engine all at once. My first chain saw was an old Homelite EZ with a blue metal case and a 20" bar. If this does not fix the issue, it may be necessary to replace the whole starting rope system with another one. The Stihl chainsaw is a two-stroke gas-powered tool that uses a substantial amount of compression to pull fuel from the tank, mix it with air and ignite it to produce energy that runs the chainsaw. If A two cycle engine gets flooded BADLY, oil can separate from the gas mix, accumulate in the crankcase and creates an hydrostatc lock. Pull the rope until it starts. The early 064, 044, 066 came with a red master control. 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. A clear sign that you may have a chainsaw engine is when you smell gas while starting it. You can clean and mildly clogged carburetor but if it is too severe, replace it with one compatible with your chainsaw model. Help, can't pull start Stihl MS250 chainsaw, too much compression. I used to have a Homelite that would do that if I left gas in it. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Don't put water into the 2 stroke. 3 9 9 comments Best Add a Comment Revolutionary-Act469 2 yr. ago Doesn't pull at all or just hard to pull. Below we have discussed the most common reasons why your chainsaw wont idle and the best way to fix it. I've done it to high hour Kohler engines many times. The Stihl chainsaw uses a four-position lever ignition system called the master control lever. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Obviously, the motor, which has a huge capacity, will require more compression. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. Not sure it would accomplish anything on a 2-stroke chain saw engine. 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. When this pressure, or compression, is too low or high, the chainsaw . Make sure there is oil in the engine. This increased distance will cause the chain to keep coming out of the guiding bar with the vibrating saw. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. Then Google decarb . How does it feel with the spark plug removed? 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.

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