I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. "@type": "ImageObject", It may not display this or other websites correctly. 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. I would suspect the timing is too early. Other than that, you should also use the correct spark plugs for your chainsaw. 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. The Stihl chainsaw uses a four-position lever ignition system called the master control lever. Does the saw have a compression release? Why is the Garage Door Opener Light Not Working? Turn off the choke by pressing the control lever to activate the fast idle. Stihl 291 chainsaw too much compression Check the compression of the engine. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. Carboned rings will decrease not increase compression. Make sure there is oil in the engine. I've done it to high hour Kohler engines many times. Is the spark plug the correct one for the saw? Trying to rotate the chain while a huge piece of wood is . Remove the right side cover, bar, and chain. 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. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. 1. saw has new carb 2. flywheel has been removed and key inspected. Pull the rope until it starts. A two-stroke gas-powered chainsaw uses relatively few moving parts. It is harmful to your machine to use old fuel. In most cases, a buildup of carbon under the rings presses the rings against the cylinder, culminating in compression of the cylinder. A problem in the ignition system is likely to be the culprit when the chainsaw doesnt spark. I thought all the fuel was out but there was some in the line yet. The excess gas can be cleared simply by removing the plug and operating the starter a few times. Replace the spark plug with a new identical. You have an option to either pull off the starter and clean it or look for an ideal replacement for your starter house. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. The following have been addressed. "headline":"Chainsaw has too much compression", Stihl recommends using 89 octane gasoline without ethanol, and the gas should not contain more than 10% ethanol. Unscrew the spark plug using a ratchet and screw the compression gauge in its place. Then Google decarb . Recognised as a leading saw in the forestry industry, it is available in guide bar lengths 13"/32cm to 18"/45cm. The carburetors work in a chainsaw engine allows the right amount of fuel and air mixture into the combustion chamber. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. Make sure it's greased and the bushings are good. If not I'm honestly kinda stumped. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright . An example of data being processed may be a unique identifier stored in a cookie. Do that to the starter side when you're looking at the starter assy. If your saw doesn't have a compression release since like you say its not a pro, then the two things I would check is either the go through recoil assembley with a fine tooth comb. It runs good after I get it started. It works when cold-starting the engine, when the engine is idle and when the engine is open. It will be apparent if it is, but usually a scored saw won't run good, if at all. 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 That is the nature of a 250. 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. It would give you rusted bearings. You can check the compression by pulling the spark plug out and holding it in your hand. The carburetor is a significant part of the chainsaw. Press J to jump to the feed. Loosen the nuts holding the clutch cover and disconnect the chain shroud and remove the oil plate. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. A 250 has a fair amount of compression for a smaller saw but not that bad. 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. This may sometimes jam your chainsaws rings, causing it to become inoperable. 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. So, in our suggestion, one of the first things to check while feeling high compression is the starter spring. "publisher": { Runs well, except it. Sometimes it kicks and the rope pulls right out of my hand. In other words, the problem is in the trigger itself, not a. carb adjustment screw. Get you some Sea Foam at the local auto parts store. First thing I'd check is the pull start assy. You are misunderstanding WHY water is put into carboned up engines. In a similar vein, if the wrong kind of oil is used, the compression may be increased. ", I would never put water in it! Stihl oil has been used. If you find the brake drum moving, you must replace the needle bearing. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. Modern View Forum powered by phpBB 2001, 2005 phpBB Group. All it needs is a few inches missing and it will pull too hard like the compression is too high. Here is how to troubleshoot a malfunctioning spark plug. Youll need to clean the cylinder and piston to fix this thoroughly. If this is the case, you may want to try lubricating the rope to see if it would assist to resolve the difficulties. Check the saws exterior for loose bolts, nuts, and screws and tighten them with an adjustable wrench or screwdriver. The chainsaw motor engine capacity can range from 30CC and 50CC to 150 CC. If it is hard to pull, then check how the spring is performing. Apparently gas would seep int crankcase and over several months of setting gas would evaporate leaving oil behind and first time it was pulled would suck oil into the cylinder. If anything prevents the right amount of fuel into the combustion chamber, the chainsaw wont start. First thing I'd check is the pull start assy. of compression. We will explain the causes of high compression and how you can quickly fix it to make it run smoothly. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. I hook up a drill to the nut on the clutch and start hard starting saws that way . Sounds flooded, or maybe wrong sparkplug? Check the spark plug and replace it if needed. { Flooding usually happens due to an underlying issue: a bad spark plug, bad gas, or a faulty carburetor. If it does maybe it is plugged. A large engine has a huge capacity in its motor. Check the spark plug of the chain saw if the engine is not starting at all. I;ve read somewhere to put water? You can also quickly fix this anomaly by ensuring a proper troubleshooting of the pulley compartment to find damages. Every time you fuel the chainsaw, you should make sure to drain the old fuel first to avoid contaminating the new fuel. An engine is fit on the rear side of a chainsaw. It would give you rusted bearings. 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. Whether you are a beginner or a professional woodworker, knowing how to fix your chainsaw will save you time and money seeking help from a service center. 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. Clean any mildly dirty parts and replace all the damaged parts. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. 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 the starter rope and look for a blue spark between the electrode of the spark plug. $99.95. Not sure it would accomplish anything on a 2-stroke chain saw engine. If any part of a carburetor has issues, the right amount of fuel/air mixture wont pump into the chamber, therefore, preventing the engine from starting. idle. Lift the bars nose and tighten the nuts on the sidebar to secure the sidebar and guide bar in place. Don't know what to do at this point. I'm hearing thats just the nature of the beast. Sometimes the spring stops working correctly due to overuse and becomes brittle. Youre familiar with how to start a stihl yes? The second thing, Read More Stihl Chainsaw Charger Not WorkingContinue, Your email address will not be published. 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 the engine starts running, turn the choke off. 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. It's from not pulling hard enough. After that, using a ratchet, remove the spark plug from the engine. Spark plugs that are not functioning properly are another probable cause of excessive compression. Subsequent starts are just as hard. You need to pull the exhaust to check that. It can be from something as simple as starting the chainsaw wrongly to more severe issues like a damaged carburetor. Remove ignition coil and muffler. If a chainsaw has a 2 stroke engine, then the maximum compression it requires is 110-130 PSI. "datePublished": "2017-08-17", Even though it was purchased "brand new" I'm not so sure. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. 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. Posted December 27, 2017. 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! Therefore, it does not need any compression rate to start. Make sure the crank taper is clean and the flywheel taper also. Currently I live in Austin, United States. Disconnect the spark plug from the engine and inspect if it is damaged, eroded, or dirty. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. chain saw compression release mod. Step 1: Prepare the chainsaw Remove the spark plug from the chainsaw. Cleaned it all up, and had it tuned up. 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. The ignition system is responsible for igniting the fuel and air mixture to produce energy that powers the chainsaw. It is like there is too much compression. The flywheel is loose? Hold the tip of the blade and adjust the tension of the chain correctly. The first step is to remove the cover that covers the spark plug on your chainsaw. To inspect the guide bar, disassemble the chain cover, chain and bar. Cleaned air filters and both were very dirty. Advanced arborist chainsaw with a top handle and STIHL M-Tronic technology. Quoting Removed, click Modern View to see Don't put water in the saw-ever. You should also make sure the new gas you use is appropriate for the chainsaw. Didnt somehow get straight oil in the cylinder did you? ProTip: You can use a small air compressor to blow air through the air filter and get rid of the loose dust before proceeding to clean it further. My question is what is causing the trigger to not slow down. Insufficient fuel in the system may result in excessive compression. If it looks physically fine after cleaning it and you havent changed it in a few seasons, you should still replace it. i have a ms 250. Get you some Sea Foam at the local auto parts store. We're all about fixing small engines, from carburetor rebuilds, to crankshaft machining. When this pressure, or compression, is too low or high, the chainsaw . I was given (estate) a small McCulloch chain saw and it started and ran great. What ratio mix is he using? Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V. 4 Possible Problems & Solutions Problem 1: Damaged starter housing Solution: 1. Make sure you have a replacement spark plug on hand in case the problem recurs in the future. The Housing is the outer cover of the starter, and if it is damaged, your chainsaw suffers stiffness during a pull. Reassemble the chainsaw, refill the fuel tank, crank the engine and check for oil along the bar. Of all the Stihl saws, the MS250 is the toughest to start in relation to it's size. Pull trigger and set full choke. Register today and take advantage of membership benefits. "interactionStatistic": { When the oil pimp or oiler is faulty, it will reduce the chainsaws performance and power. Now it has sat since the last use and I went to start it and it turned over maybe three times and the compression . More information can be found on this page. Also check the air filters and make sure they are clean. Our aftermarket suitable replacement Stihl MS 250 C chainsaw compression release parts meet or beat OEM specs, offer a considerable cost savings, and usually ship in 24 - 48 hours. I hook up a drill to the nut on the clutch and start hard starting saws that way . What worked with my MS440 kicking problem should also work with that one. The saw runs and starts great. It's supposed to warm up later this week so I'll be able to do some more on this chain saw. I usual only choke my MS250 for one pull and no longer have the flooding issue. The owner is complaining of hard to pull start. Over time or when using the wrong fuel, the fuel filter becomes too clogged and restricts fuel flow, killing the engine shortly after starting. That is the nature of a 250. The vibration of the tool during use can run some fasteners loose, preventing it from starting again. Doesnt pull at all or just hard to pull. 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. water will not dissolve carbon; it is far too hard to be effected. Use of this Web site constitutes acceptance of our. It would give you rusted bearings. Would not be afraid to do it to a 4, 6, or V-8. $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 Guido 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. A highly compressed engine will not be able to work smoothly because of the too much pressure on engine and you will find it hard to start the engine. If you regularly use the chainsaw, then there might be the possibility that your starter spring breaks off. The manual for this model, and the parts breakdown, show a compression release valve. If the spark plug is too corroded or the electrode is faulty, it cannot create an electrical current to start the system. If you recently refueled your Stihl chainsaw, stale gas can be a reason why it wont start. Quoting Removed, click Modern View to see What?? I have a MS250 that has come up on compression since new. 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. 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. If it is flooded that should clear it up. You never try to get it to run with the choke on. Keep in mind that the stuck ignition rope can also damaged other parts inside the starter assembly. 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. Back to top derwen1959 Long Time User Once it's removed, you can place a gauge on the place of the spark plug. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. . 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. anthonyg_ma Original Author 16 years ago Canguy, thnks for the tips! "dateModified": "2017-08-17", 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. Soaking in water will do nothing but rust things up . I think that's what I'd do. Make sure it fits snug. Remove The Chainsaw's Spark Plug Set The Pressure Test Gauge Tug On The Chainsaw's Starter Rope Reset The Chainsaw's Spark Plug Do The Thumb Test Remove The Spark Plug Place Your Thumb Over The Hole Tug On Your Chainsaw's Starter Rope Problems Caused By Too Little Or Too Much Compression Low pressure in a chainsaw High compression in a chainsaw The extra effort to pull the saw is probably due to carbon build up on the piston crown and combustion chamber. $75.00. Ron Cook. Replace with a new starter house Problem 2: Damaged pulley system Solution: 1. Register today and take advantage of membership benefits. Locate the tension adjustment screws to the side of the chainsaw guide bar. The power of the motor of an engine is measured in its capacity. 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! 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. "@type": "WebPage", "@type": "Person", If oil is in there it is what makes the engine feel like it is almost locked up. Check the tension 2. 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. I've been working on a Stihl 026 chainsaw that John found, and it is very hard to crank. Try blowing the crankcase out with air. 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. 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. The lack of oil dries the chainsaw assembly, which causes high compression and becomes very difficult for you to handle the chainsaw. If the compression is not produced in the engine at an appropriate level, it will not be able to convert fuel into energy. It is thus highly recommended that you drain the fuel from your chainsaw if it still has any old gasoline left in it. The saw feels good in my hands and its got a surprising amount of power. "name": "Egbinor" Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. While rope attached to a pulley, the further connection of the pulley is with springs and pawl to make sure the pulley is tensioned and helps in retracting and spinning. Uninstall the spark arrestor and unblock it using a brush, but you can also replace it for efficiency. This is bad practice, and can damage your chainsaw. I luv my 064. 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.. The ideal pressure range of the Stihl chainsaw is between 90 and 110 psi. It may not display this or other websites correctly. A very loose chain will cause the blades to come out of the bar, while a very tight chain is also not ideal for the proper functioning of the chainsaw. Check for side play in the crankshaft. Cleaned air filters and both were very dirty. You may also notice that the chain saw loses power during operation. 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. Your email address will not be published. Low pressure, 20 to 30 pounds is all you need. Could your gauge be off a little? Poke the oil feed hole with a 16-gauge wire to unclog it until it slides through the hole smoothly. check the cylinder & piston for carbon build-up, how much compression Does the chainsaw Engine need, How To Reset Echo 58-Volt Battery Charger. 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! $49.99. Also check the air filters and make sure they are clean. 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.

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