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Wipe off lubricant and grime from the bar with a clean rag. A chainsaw with no spark will shut down suddenly or not start at all. 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. Pull the rope until it starts. The saw is about 2 years old, light use. I bought it used around 1978. 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. Any ideas? Turn the brake off. everything is harder in a tree, not a conclusive test. Stihl chainsaw compression test Joe_Power Jun 2, 2015 Not open for further replies. $20.00 shipping. Save my name, email, and website in this browser for the next time I comment. You're familiar with how to start a stihl yes? 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. Check for broken teeth on the chain and replace them if necessary. Didnt somehow get straight oil in the cylinder did you? Youre familiar with how to start a stihl yes? Take off the muffler or the carb to get access. If repeated cleaning does not fully unclog the carburetor, you will have to replace it. 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?? Create an account to follow your favorite communities and start taking part in conversations. MS250 compression | Outdoor Power Equipment Forum Other than that, you should also use the correct spark plugs for your chainsaw. I would never put water in it! To inspect the guide bar, disassemble the chain cover, chain and bar. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. in the, All Rights Reserved. Try it, it may just do the trick! Not sure it would accomplish anything on a 2-stroke chain saw engine. If oil is in there it is what makes the engine feel like it is almost locked up. Pull the starter rope and look for a blue spark between the electrode of the spark plug. To ensure correct functioning and to prevent excessive compression, you might have to repair worn-out parts with new ones. Would have to remove spark plug and rinse cylinder with gas to be able to start. If you recently refueled your Stihl chainsaw, stale gas can be a reason why it wont start. Ivor from uk here and I have a stihl chainsaw and when I am hedge laying or pletching as it is called the saw only runs for 15 or 20 seconds or perhaps 1 minute at the most if there is a big cut to make the spark plug tip builds up with carbon,i use proper 2 stroke oil at a ratio of 25to1 does any pletching or hedge laying go on across the pond?? I'm also going to double check it has the correct resistor type spark plug. Friction is usually the cause of a rope failing to draw when it should. I would suspect the timing is too early. Here is how to troubleshoot a malfunctioning spark plug. You are misunderstanding WHY water is put into carboned up engines. All it needs is a few inches missing and it will pull too hard like the compression is too high. How to Reprogram a Chamberlain Garage Door Opener, How to Program a Universal Garage Door Opener, Toro Lawnmower Troubleshooting & How To Guide, Bostitch Nail Gun Troubleshooting & How to Guide. Make sure you have a replacement spark plug on hand in case the problem recurs in the future. }, There is no idle when I release the trigger. what and or where is the metering lever.? A hot engine also requires more compression to convert furl into energy as compared to the colder one. We will explain the causes of high compression and how you can quickly fix it to make it run smoothly. 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. Check the spark plug and replace it if needed. Would not be afraid to do it to a 4, 6, or V-8. Ron Cook. First, remove the spark plug from the chainsaw. chain saw compression release mod - Red Power Magazine When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. A cold engine will need the compression of 50-100 PSI whereas a hot engine will require compression above 150 PSI. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. Are you sure the starter rope isn't a little too short? Check if the wires are damaged or broken and replace them if necessary. "headline":"Chainsaw has too much compression", It may not display this or other websites correctly. That model is extremely easy to flood. I get it going now and its easier but its still a bear. How does it feel with the spark plug removed? High effort to pull start my 2-stroke blowers | Lawn Mower Forum Wipe off any flammable fluid from the metal surface of the engine with a clean rag. How big a fella are ya? Turn the engine to get under the piston and blow the crankcase out. The spark plug is located in the engine and ignites the fuel and air mixture, driving the piston and running the engine. 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. Does the saw have a compression release? 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. What are the numbers on your sparkplug? 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. An engine is fit on the rear side of a chainsaw. Fine adjust everything and both saws start Normal now. On a 2 stroke the water would go into the crank case first and pool up. read more Vince O. It is a prevalent issue and can be fixed and detected easily without consulting a mechanic. As long as I can get it going.. I think that's what happened, although I didn't think such a small amount could do it. "url": "https://www.yesterdaystractors.com/graphics/smllogo.png", Hello D beatty, Here is a link for two stroke engine air cycle, Guido. MS 260 - Robust chainsaw for forestry work - Stihl { 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. The Pulley compartment plays a massive role in retracting the ignition rope. You are using an out of date browser. The first step is to remove the cover that covers the spark plug on your chainsaw. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. 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. An example of data being processed may be a unique identifier stored in a cookie. Every chainsaw engine has a different capacity depending upon its motor power. If the coil is faulty, there will be no spark to start the engine and run the chainsaw. Chainsaw Too Much Compression: Causes & Solution I wouldn't go messing with the carb expecting to cure the issue unless you have obvious signs of flooding when trying to start. It runs good after I get it started. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. Are you sure the starter rope isn't a little too short? Pour starting fluid into the carburetor and crank the engine several times. Check the chain oiler and ensure it is functional. 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. How Much Compression Should a Stihl 066 Have? - SFGATE Turn the idle speed clockwise until the saw idles and chain turns, and then make a one-fourth counterclockwise turn. Soaking in water will do nothing but rust things up . If this is the case, you may want to try lubricating the rope to see if it would assist to resolve the difficulties. We got rid of both of those useless things . Because of an absence of lubrication, the chain saw system becomes brittle, resulting in excessive compression of the chain saw mechanism. NelsGarage will share the knowledge Ive gathered about different tools and give you tips to accomplish your DIY projects faster. It runs good after I get it started. } Don't put water into the 2 stroke. 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. . Carboned rings will decrease not increase compression. no, afraid I don't have equipment to test. This is bad practice, and can damage your chainsaw. "height": 57 Check for any cracks and damages and replace if necessary. Press question mark to learn the rest of the keyboard shortcuts. Don't know what to do at this point. You can check the compression by pulling the spark plug out and holding it in your hand. Block the spark plugs hole by putting a nylon rope to prevent the piston from moving. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. It works when cold-starting the engine, when the engine is idle and when the engine is open. You never try to get it to run with the choke on. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. link to Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. 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. That is the nature of a 250. If it is too damaged, you should replace it. I bought 2 032 Stihl saws at auction that pulled very hard. Therefore, most people will wonder why the chainsaw has too much compression. A drastic and frankly silly thing to do though . "url": "https://www.yesterdaystractors.com/graphics/smllogo.png", Another big issue that causes too much high compression is the lack of oil in the starter system. Every time you fuel the chainsaw, you should make sure to drain the old fuel first to avoid contaminating the new fuel. What ratio mix is he using? 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. I can probably find one with at most 65 PSI. Chainsaw excessive compression - TractorByNet The piston and rings are very shiney. Usually, this happens when you use a chainsaw after a very long time or by wear and tear of the rope. If you do not replace the starter spring on time, it will cause you to replace the whole starter assembly. As the starter, spring plays a vital role in running starter assembly smoothly. Stihl 251 chainsaw. I've been working on a Stihl 026 chainsaw that John found, and it is very hard to crank. If the chainsaw engine dies when you release the throttle, turn the low-speed screw with a screwdriver clockwise until it stops and then turns it counterclockwise once. It's supposed to warm up later this week so I'll be able to do some more on this chain saw. I;ve read somewhere to put water? It is usual for the chainsaw chains to come off with continued use, but there is usually an underlying cause when its too repetitive. 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. Stihl Chainsaw Troubleshooting & How-to Guide - Nels Garage More information can be found on this page. I bought 2 032 Stihl saws at auction that pulled very hard. Being new carb, wasn't looking that direction educate a non mechanic. The Housing is the outer cover of the starter, and if it is damaged, your chainsaw suffers stiffness during a pull. No compression when pulling start rope. Below are the reasons the chain keeps coming loose and how to fix it. Greenworks Commercial GS181 82V 18-inch Chainsaw: 50cc gas equivalent power with a stock 18-inch bar and chain ( starting at $349) Guido Quoting Removed, click Modern View to see What?? It had a compression release, and it started and ran well. I luv my 064. It's an older saw I bought at a garage sale. Stihl 291 chainsaw too much compression Check the compression of the engine. The Stihl chainsaw uses a four-position lever ignition system called the master control lever. If the chainsaw still wont start, it is defective and requires a replacement. Stihl MS 250 Chain Saw: The pull start will barely move the flywheel. 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. STIHL Chainsaw Parts Engines for sale | eBay I have a MS250 that has come up on compression since new. "dateModified": "2017-08-17", After all these operations are carried out, it is necessary to once again clean the saw from dirt, then turn it upside down and unscrew the four screws securing the engine to the chainsaw body. "@type": "WebPage", It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. Unscrew the clutch assembly on top of the oil pump. Hello. For 503552201 Cylinder Compression Plug Package Include: 3 x Cylinder Plug Cylinder Compression Plug Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. It can be from something as simple as starting the chainsaw wrongly to more severe issues like a damaged carburetor. It will be apparent if it is, but usually a scored saw won't run good, if at all. How Many Amps Does a Garage Door Opener Use? The lack of oil dries the chainsaw assembly, which causes high compression and becomes very difficult for you to handle the chainsaw. Don't put water into the 2 stroke. I hook up a drill to the nut on the clutch and start hard starting saws that way . I used to have a Homelite that would do that if I left gas in it. John Deere and its logos are the registered trademarks of the John Deere Corporation. The other cause of your chainsaws high compression could be the stuck ignition rope. My Chain Saw Is Smoking & Overheating | Hunker This may sometimes jam your chainsaws rings, causing it to become inoperable. I would never put water in it! Final step: removing the old spark plug and installing the new one. 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. Wipe off any dirt and debris and check for any signs of damages. Try it, it may just do the trick! 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. Make sure the keyway is lined up correctly and tighten the nut down good and tight. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. 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. Mar 22, 2017. All it needs is a few inches missing and it will pull too hard like the compression is too high. (there is some play when flywheel on shaft (nut not attached) 3. tank and oiler vents are operating 4. exhaust has been removed and spark arresting screen checked (clean) 5. piston/walls checked.. no scarring Ensure the chain fits snugly inside of the bar and the teeth that keep it in place are not worn down too low. This article will help you fix the most commonly reported problems of a Stihl chainsaw. Register today and take advantage of membership benefits. 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. The saw runs and starts great. 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. If a chainsaw has a 2 stroke engine, then the maximum compression it requires is 110-130 PSI. Take off the muffler or the carb to get access. Any help out thereEGBinOR Get you some Sea Foam at the local auto parts store. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. In other words, the problem is in the trigger itself, not a. carb adjustment screw. If this does not fix the issue, it may be necessary to replace the whole starting rope system with another one. Manage Settings water will not dissolve carbon; it is far too hard to be effected. Starting fluid will make the fuel more combustible and makes the process of clearing out the combustion chamber much quicker. However, you still have to confirm the size of the gap before installing. 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!!! 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. You can also quickly fix this anomaly by ensuring a proper troubleshooting of the pulley compartment to find damages. I would suspect the timing is too early. in the cylinder overnight because the rings are cerboned up? Remove the air filter cover and then slide off the rubber spark plug connector from the spark plug. Hold the tip of the blade and adjust the tension of the chain correctly. 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. Stihl is a leading manufacturer of chainsaws and other handheld outdoor and landscaping power tools. 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 A two cycle engine gets flooded BADLY, oil can separate from the gas mix, accumulate in the crankcase and creates an hydrostatc lock. Sometimes, the ignition rope is frayed or stuck inside the starter housing. 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. This compression converts fuel (any source) into the potential energy in the engine to start it. Back to top derwen1959 Long Time User Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. A heavy-duty engine gets hot faster and works better than a cold engine. Free shipping. "text": "My chainsaw has gotten very hard to pull the rope. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. A clear sign that you may have a chainsaw engine is when you smell gas while starting it. Most of the time, the chainsaw cord became hard to pull because of the Starter Housing. 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. Remove the entire carburetor and clean it. Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. Would have to remove spark plug and rinse cylinder with gas to be able to start. MS 201 T C-M | Top Handle Chainsaw | STIHL USA Try blowing the crankcase out with air. Chainsaw "Hard To Pull" Issues: Check & Fix (Within 5 Min) The manual for this model, and the parts breakdown, show a compression release valve. 4 Possible Problems & Solutions Problem 1: Damaged starter housing Solution: 1. Generally covering everything under 25 HP. 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. Oct 24, 2011 / Chainsaw excessive compression #1 . 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. "interactionStatistic": { By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Stihl MS250 Too High of Compression? - Arborist, Chainsaw & Tree Work Forum A drastic and frankly silly thing to do though . My first chain saw was an old Homelite EZ with a blue metal case and a 20" bar. Admitted Woodaholic. Fine adjust everything and both saws start Normal now. I would suspect the timing is too early. The switch might be damaged or the motor is burned out. You can follow the steps on how to troubleshoot and revive it when it wont start. However, the compression also has a limitation because a very high or very low compression will cause problems and prevent your chainsaw from operating efficiently. How Much Compression Should a Chainsaw Have. Required fields are marked *. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. I got it started. Likewise, low compression in the engine will be slow and retarding and it is a warning sign of leakage in your engine. Sometimes it kicks and the rope pulls right out of my hand. 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. Check the chain tension and adjust it if it is too loose or tight. Spark plugs that are not functioning properly are another probable cause of excessive compression. Follow the steps below on how to fix a flooded chainsaw engine. Although this is often true, it is not always the case. $99.95. The purpose of a choke in a chainsaw is to make cold starting more effortless, but if you do not use it properly. 3Pcs/lot Cylinder Compression Plug For STIHL 044 046 066 MS440 MS460 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. Ron Cook. If it does maybe it is plugged. OEM GOOD USED STIHL 048AV CHAINSAW SHORT BLOCK ENGINE 120 PSI COMPRESSION. You need to pull the exhaust to check that. Afterward, the beginning rope is pulled repeatedly until the gauge comes to a full stop on its own. Also take the spark plug out and do the same. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. I think you'll like it. Stihl MS 250 Chain Saw: The pull start will barely move the - JustAnswer or Best . Check the electrode gap of the spark plug and ensure it is 0.02 inches. A reddit for all operators of chainsaws to post experience with tools, pictures of their new saws and old workhorses and any maintenance tips. A chainsaw engine generates this compression through the explosion of the fuel in the combustion chamber and the movement of the crankcase. Consequently, operating this chainsaw becomes a really difficult chore to do. Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. Confirm the spark plug gap, check and adjust with a feeler gauge or gaping tool. Check the saws exterior for loose bolts, nuts, and screws and tighten them with an adjustable wrench or screwdriver. My name is Chris Ross. There is no carbon build up and all looks like new. Always change the spark plug after 100 operating hours of the chainsaw to avoid engine problems. It is, therefore, necessary to determine if the problem has been remedied by adding fresh fuel. A two-stroke gas-powered chainsaw uses relatively few moving parts. 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. You should also make sure the new gas you use is appropriate for the chainsaw. chain saw compression release mod. Hello D beatty, Here is a link for two stroke engine air cycle, Guido. 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. Reassemble the chainsaw, refill the fuel tank, crank the engine and check for oil along the bar. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. If oil is in there it is what makes the engine feel like it is almost locked up. Don't know what to do at this point. If the compression is too high or too low, the engine wont start. Its just that its nearly impossible to pull. }, The engine creates a vacuum pressure inside it. The key on the flywheel is in place and not sheered.