Would not be afraid to do it to a 4, 6, or V-8. Thanks. If the air filter is too clogged, you should replace it. The saw is about 2 years old, light use. Some of the contributing reasons include a full tank of oil, carbon buildup on the exhaust system, and malfunctioning spark plugs. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. Sometimes an adapter is needed to make a tight fit. Take off the muffler or the carb to get access. Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. 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?? Press question mark to learn the rest of the keyboard shortcuts. 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! A reddit for all operators of chainsaws to post experience with tools, pictures of their new saws and old workhorses and any maintenance tips. Try blowing the crankcase out with air. If oil is in there it is what makes the engine feel like it is almost locked up. Final step: removing the old spark plug and installing the new one. Change in temperatures and dirt will cause clogging anywhere the oil passes, and this can prevent the oil from spread all across the bar. I would never put water in it! 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. Sometimes, the ignition rope is frayed or stuck inside the starter housing. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. "@type": "InteractionCounter", Now, the gauge might come in a number of size variations, so you need to use an adapter to make a perfect seal between the gauge and the chainsaw. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. 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. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. 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 It is like there is too much compression. The chain clutch might be, Read More Cordless Chainsaw Wont StartContinue, The most common reason is simply the wrong battery. 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 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. The extra effort to pull the saw is probably due to carbon build up on the piston crown and combustion chamber. Unscrew the spark plug using a ratchet and screw the compression gauge in its place. A 250 has a fair amount of compression for a smaller saw but not that bad. It will be apparent if it is, but usually a scored saw won't run good, if at all. How Much Does it Cost to Install a Garage Door Opener? 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. Reassemble the chainsaw, refill the fuel tank, crank the engine and check for oil along the bar. It takes a Bosch WSR6F or NGK BPMR7A. To ensure correct functioning and to prevent excessive compression, you might have to repair worn-out parts with new ones. Carboned rings will decrease not increase compression. Do that to the starter side when you're looking at the starter assy. I've seen a 20psi drop with the wrong type of gauge to be pretty common. 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. A 50CC engine needs 150 PSI compression. }. Stihl 024 - Sherlock Holmes issue - help needed here. The spark arrestor in a chainsaw traps exhaust products emitted from an internal combustion engine. "author": { If it is flooded that should clear it up. If the issue persists after the addition of new fuel to the tank, there may be a fault with the gas pipelines or the fuel filters. You are misunderstanding WHY water is put into carboned up engines. "datePublished": "2017-08-17", As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. 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. It was easier to pull after I cleaned it up, but still tough. Does the saw have a compression release? Try blowing the crankcase out with air. If you find the brake drum moving, you must replace the needle bearing. Therefore, most people will wonder why the chainsaw has too much compression. Likewise, low compression in the engine will be slow and retarding and it is a warning sign of leakage in your engine. The power of the motor of an engine is measured in its capacity. And some will have more. Once youve done that, reassemble the chainsaw, which should work properly again. stihl ms290 farm boss; By Ron Cook December 27, 2017 in General Chat. 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?? First thing I'd check is the pull start assy. More information can be found on this page. Create an account to follow your favorite communities and start taking part in conversations. 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. Disengage the chain brake, turn on the ignition switch and install the new spark plug into the rubber connector. That is what was told to me by the area distributor technician. Mar 22, 2017. This may sometimes jam your chainsaws rings, causing it to become inoperable. Most Stihl chainsaws have a resistance of 0.2-3.0 ohm on the primary coil and 5-20 kiloohm on the secondary coil but always confirm the correct reading for your model number. In a similar vein, if the wrong kind of oil is used, the compression may be increased. In other words, the problem is in the trigger itself, not a. carb adjustment screw. You will notice the compression less. 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. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright . lol. Take off the muffler or the carb to get access. chain saw compression release mod. 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?? We and our partners use cookies to Store and/or access information on a device. Ask him if he's drop-starting it. Just wondering what your opinions are of the lowest compression you can run a Stihl MS250 at. Would not be afraid to do it to a 4, 6, or V-8. 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. Register today and take advantage of membership benefits. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. On a 2 stroke the water would go into the crank case first and pool up. in the, All Rights Reserved. Thanks! The purpose of a choke in a chainsaw is to make cold starting more effortless, but if you do not use it properly. 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. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. If the spark plug is too corroded or the electrode is faulty, it cannot create an electrical current to start the system. 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. There is no carbon build up and all looks like new. Below are the reasons the chain keeps coming loose and how to fix it. Please use the navigational links to explore our website. That is what was told to me by the area distributor technician That is the nature of a 250. Stihl is a leading manufacturer of chainsaws and other handheld outdoor and landscaping power tools. Turn the brake off. . Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. Get you some Sea Foam at the local auto parts store. Remove the filter, engine control lever and Stihl carburetor. 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. After that, using a ratchet, remove the spark plug from the engine. It may not display this or other websites correctly. How To Fix Chainsaw Battery Charger Blinking Red? "height": 57 A lot of variables might contribute to excessive compression while using a chainsaw. Usually, this happens when you use a chainsaw after a very long time or by wear and tear of the rope. 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. Sparkplug was correct but I think it was a little flooded. 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. after that I'd be looking at crank bearings. 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. Every chainsaw engine has a different capacity depending upon its motor power. "@id":"https://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=toolt&th=435118", Youre familiar with how to start a stihl yes? As the starter, spring plays a vital role in running starter assembly smoothly. It very often kicks back and pulls the starter rope back in. Loosen the nuts and bolts clockwise and then pull out the oil pump gently. If you do not replace the starter spring on time, it will cause you to replace the whole starter assembly. Try it, it may just do the trick! It is significantly tougher to pull over than an 024 or the new 241. No carbon on top or on roof of cylinder. Sometimes the spring stops working correctly due to overuse and becomes brittle. Then Google decarb . People sometimes try to cut down a tree that is too big for their chainsaw. Is the spark plug the correct one for the saw? I've seen it happen a couple times. A cold engine will need the compression of 50-100 PSI whereas a hot engine will require compression above 150 PSI. If this is the case, you may want to try lubricating the rope to see if it would assist to resolve the difficulties. "@type": "ImageObject", There are sprays (power tune) for removing carbon, but I doubt if that's your problem. Fine adjust everything and both saws start Normal now. Hello D beatty, Here is a link for two stroke engine air cycle, Guido. I think that's what happened, although I didn't think such a small amount could do it. Your ignition rope must be intact properly with the pulley to work correctly. "@type": "WebPage", check the cylinder & piston for carbon build-up, how much compression Does the chainsaw Engine need, How To Reset Echo 58-Volt Battery Charger. Don't know what to do at this point. When the motor warms up after about a minute, turn on the choke position. A 250 is a joy to pull start Compared to my 200+ compression ported saws with no decomp. 24" is what I've got on mine, but it can handle a bigger bar. The Stihl 066 chainsaw uses the same type of engine most gasoline-powered yard tools use, a two-cycle combustion engine. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. Small Engine Technician I'm hearing thats just the nature of the beast. link to Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. Use of this Web site constitutes acceptance of our. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . Required fields are marked *. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. The engine creates a vacuum pressure inside it. The other reason might be the use of the wrong type of oil for the climate. A large engine has a huge capacity in its motor. When there is no air for the spark to ignite, the chainsaw will start and then die after a short while. How big a fella are ya? 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. There is no idle when I release the trigger. OEM GOOD USED STIHL 048AV CHAINSAW SHORT BLOCK ENGINE 120 PSI COMPRESSION. There might be a small stone or thing that is stuck inside the starter and causes the rope not to retract. Also take the spark plug out and do the same. 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. Low pressure, 20 to 30 pounds is all you need. It is usual for the chainsaw chains to come off with continued use, but there is usually an underlying cause when its too repetitive. 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. Press J to jump to the feed. }, We describe all the possible issues and also suggest the solutions to fix them too. 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. 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. Fuel filters trap dirt and contaminants from the fuel to prevent them from damaging the engine. Trying to rotate the chain while a huge piece of wood is . Make sure it's greased and the bushings are good. "description":"Discussion of Chainsaw has too much compression in the Tool Talk forum followed by comments. Therefore, it does not need any compression rate to start. Any help out thereEGBinOR Get you some Sea Foam at the local auto parts store. Doesnt pull at all or just hard to pull. Soaking in water will do nothing but rust things up . I used to have a Homelite that would do that if I left gas in it. Hello D beatty, Here is a link for two stroke engine air cycle, Guido. Runs well, except it. 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. The early 064, 044, 066 came with a red master control. For 503552201 Cylinder Compression Plug Package Include: 3 x Cylinder Plug Cylinder Compression Plug I've been working on a Stihl 026 chainsaw that John found, and it is very hard to crank. A chainsaw with no spark will shut down suddenly or not start at all. It's also possible the piston or cylinder are scored or carboned up. In addition, you should check the muffler and piston while youre at this point. Versions MS 260, Bar length 37cm, RSC
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