Hello D beatty, Here is a link for two stroke engine air cycle, Guido. 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. Do that to the starter side when you're looking at the starter assy. People sometimes try to cut down a tree that is too big for their chainsaw. Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. Hope this helps. Don't put water into the 2 stroke. When the fuel starts to turn stale, it gums up and clogs the carburetor just as it would in an unused lawnmower. You can follow the steps on how to troubleshoot and revive it when it wont start. How to Test Stihl 180 Compression CIMFLOK.COM "height": 57 As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. It's from not pulling hard enough. What worked with my MS440 kicking problem should also work with that one. Check for clogging around the bar oil. $20.00 shipping. I'm an arborist by profession & a blogger by passion. I used to have a Homelite that would do that if I left gas in it. Find the low speed, high speed, and idle speed screws near the carburetor, start the engine and allow it to warm up. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. "publisher": { Check the choke of the chainsaws engine and make sure it is completely closed. This could be understood by reading the further explanation below. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. How Much Does it Cost to Install a Garage Door Opener? 3Pcs/lot Cylinder Compression Plug For STIHL 044 046 066 MS440 MS460 after that I'd be looking at crank bearings. Stihl recommends using 89 octane gasoline without ethanol, and the gas should not contain more than 10% ethanol. "userInteractionCount": 23 Make sure it's greased and the bushings are good. The other reason might be the use of the wrong type of oil for the climate. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. Change in temperatures and dirt will cause clogging anywhere the oil passes, and this can prevent the oil from spread all across the bar. Check if the wires are damaged or broken and replace them if necessary. Any ideas? "@type": "ImageObject", Make sure it fits snug. Get it ported and it brings it to another level. Quoting Removed, click Modern View to see Don't put water in the saw-ever. Detailed, well-researched, and accurate home and garden information presented in an understandable format is our primary goal. Make sure there is oil in the engine. Stihl 026 Chainsaw hard to crank - retrofit compression relief valve Generally covering everything under 25 HP. But it was stolen along with other tools around 1990. The choke position is the fourth setting on the master control lever. I have plenty of engines with REALLY low compression that I'll be glad to swap him. Any help out thereEGBinOR Get you some Sea Foam at the local auto parts store. 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. How Much Compression Should a Stihl 066 Have? - SFGATE Obviously, the motor, which has a huge capacity, will require more compression. The key on the flywheel is in place and not sheered. I have a MS250 that has come up on compression since new. This can lead to serious injuries, including cuts and amputations. I'll even do the labor for free. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. 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 it would accomplish anything on a 2-stroke chain saw engine. You can unclog the carburetor if the clog is minor. That is the nature of a 250. This increased distance will cause the chain to keep coming out of the guiding bar with the vibrating saw. sthil 034 hard to pull the cord in Chainsaws - The Forestry Forum Required fields are marked *. 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. Reassemble the chainsaw, refill the fuel tank, crank the engine and check for oil along the bar. Fine adjust everything and both saws start Normal now. We're all about fixing small engines, from carburetor rebuilds, to crankshaft machining. 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. In this case fixing or repairing is required or worst replacing the engine all at once. Pull the starter rope and look for a blue spark between the electrode of the spark plug. The ignition system is responsible for igniting the fuel and air mixture to produce energy that powers the chainsaw. First, remove the cylinder and piston from the 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 have a MS250 that has come up on compression since new. We got rid of both of those useless things . My husky 266xp has been that away from newjust pull over slow for 2 or 3 times and then try cranking.. You are misunderstanding WHY water is put into carboned up engines. It's supposed to warm up later this week so I'll be able to do some more on this chain saw. That is the nature of a 250. STIHL Chainsaws FAQs | STIHL Product FAQs | STIHL USA I went with a meteor piston/cylinder set. The recoil starter in a chainsaw is a start mechanism that allows you to pull the rope. Then Google decarb . Also take the spark plug out and do the same. The compression limit should also be doubled if the engine capacity is 100 CC. If you suspect a compression issue, seek professional help as compression repairs can be complicated. "url": "https://www.yesterdaystractors.com/graphics/smllogo.png", Your email address will not be published. Chainsaw excessive compression - TractorByNet I have a MS250 that has come up on compression since new. 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. When this pressure, or compression, is too low or high, the chainsaw . Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Try it, it may just do the trick! You will notice the compression less. Remove the air filter cover and then slide off the rubber spark plug connector from the spark plug. The compression limit should also be doubled if the engine capacity is 100 CC. It is possible however to flood a two stroke which can cause the plug to fowl. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. Friction is usually the cause of a rope failing to draw when it should. That is the nature of a 250. I;ve read somewhere to put water? It runs good after I get it started. What Causes Too Much Compression on Poulan Chain Saws? 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. water will not dissolve carbon; it is far too hard to be effected. Getting these problems resolved is a rather straightforward process. everything is harder in a tree, not a conclusive test. Also check the air filters and make sure they are clean. Also check the air filters and make sure they are clean. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. }, 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. It prevents the carburetor from allowing too much fuel into the combustion chamber. Turn the idle speed clockwise until the saw idles and chain turns, and then make a one-fourth counterclockwise turn. The saw feels good in my hands and its got a surprising amount of power. A clear sign that you may have a chainsaw engine is when you smell gas while starting it. No compression when pulling start rope read more Expert Stihl ms 180 chain saw, new carb, spark plug, compression stihl ms 180 chain saw, new carb, spark plug, compression 110, new gas, still won't start what next, piston is not scored. Ensure the chain fits snugly inside of the bar and the teeth that keep it in place are not worn down too low. let it idle over lunch, just made sure to not go too long between filling it with gas, while running of course. Ron Cook. 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. I think that's what I'd do. The spark arrestor in a chainsaw traps exhaust products emitted from an internal combustion engine. water will not dissolve carbon; it is far too hard to be effected. 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. It is best to put a new plug in after clearing. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . If the compression is not produced in the engine at an appropriate level, it will not be able to convert fuel into energy. Hold the saw firmly to the ground and crank the engine about four to six times to bleed out the fuel from the combustion chamber. ", If the air filter is too clogged, you should replace it. The saw runs and starts great. It is effortless to check the starter spring; pull the ignition rope. It will be apparent if it is, but usually a scored saw won't run good, if at all. 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?? The extra effort to pull the saw is probably due to carbon build up on the piston crown and combustion chamber. Stihl MS192T Chainsaw Fuel Oil Tank Engine Housing Assembly OEM. 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. You are misunderstanding WHY water is put into carboned up engines. Final step: removing the old spark plug and installing the new one. Your ignition rope must be intact properly with the pulley to work correctly. Why Does My Chainsaw Have Too Much Compression? Carbon buildup is yet another important factor in the increasing compression experienced by chain saws over time. How Much Compression Should A Chainsaw Have - Toolsadvisorpro Try blowing the crankcase out with air. 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. 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. 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. He checked.it clearly says that in the OP. This is bad practice, and can damage your chainsaw. Blup throttle to bring it down to idle. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V. How To Fix Chainsaw Battery Charger Blinking Red? High effort to pull start my 2-stroke blowers | Lawn Mower Forum 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. Even with new spark plugs in, incorrectly removing and installing the spark plugs can prevent the engine from starting. The lack of oil dries the chainsaw assembly, which causes high compression and becomes very difficult for you to handle the chainsaw. Most fuels nowadays are a blend of ethanol which attracts moisture and speeds up the rotting process. Unscrew the clutch assembly on top of the oil pump. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. The first step is to remove the cover that covers the spark plug on your chainsaw. "@type": "Person", Carboned rings will decrease not increase compression. 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. When it comes to compression values, those between 90 and 110 psi are deemed to be acceptable. Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. Can anyone make a suggestion. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. "@context":"https://schema.org", Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. Keep in mind that the stuck ignition rope can also damaged other parts inside the starter assembly. Your chainsaws compressive strength is measured with the use of a screw-in gauge. To clean it, drain the fuel, spray some carburetor cleaner and loosen the residue with a small brush. Make sure it is snug but can also move freely by hand. The second thing, Read More Stihl Chainsaw Charger Not WorkingContinue, Your email address will not be published. Soaking in water will do nothing but rust things up . 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. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. Move the selector lever up one position immediately or the saw will flood on the very next pull. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. Over time, soot from the engine clogs up the spark arrestor causing the chainsaw to stall. Save my name, email, and website in this browser for the next time I comment. If there is any damage to the pulley at any stage, it will cause High Compression or stiffness during a pull.. Stihl chainsaw compression test | Bob Is The Oil Guy 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. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. 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. Turn the brake off. Turn the engine to get under the piston and blow the crankcase out. Each chainsaw has a different level of compression. Remove the right side cover, bar, and chain. I have had the cylinder off. 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. Follow the steps below on how to fix a flooded chainsaw engine. If it does maybe it is plugged. Problem starting Stihl 032AV chainsaw - Houzz Stihl MS 250 Chain Saw: The pull start will barely move the flywheel. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. It is a prevalent issue and can be fixed and detected easily without consulting a mechanic. $75.00. Being in the cutting services for more than 10 years, I know a thing or two about chainsaw. Keep in mind that good maintenance and storage will reduce breakdowns and maintain your tools performance throughout its lifetime. This may sometimes jam your chainsaws rings, causing it to become inoperable. Manage Settings The plug should be tight against your thumb. Free shipping. I bought it used around 1978. Below are the reasons the chain keeps coming loose and how to fix it. When the oil pimp or oiler is faulty, it will reduce the chainsaws performance and power. My first chain saw was an old Homelite EZ with a blue metal case and a 20" bar. 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. It very often kicks back and pulls the starter rope back in. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. I got it started. Can also be used with hedge trimmer attachment HS 246. You may also notice that the chain saw loses power during operation. Here is a link for two stroke engine air cycle. stihl ms290 farm boss; By Ron Cook December 27, 2017 in General Chat. It would give you rusted bearings. 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. If you notice the treads are worn, which prevents the device from pumping, replace it with a new one. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. (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 Take off the muffler or the carb to get access. "width": 200, When the motor warms up after about a minute, turn on the choke position. And some will have more. Use a screw wrench to loosen the nuts on the guide bar side panel to give you room to adjust the chain. 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. The Stihl 066 chainsaw uses the same type of engine most gasoline-powered yard tools use, a two-cycle combustion engine. I would suggest clearing the cylinder by pulling the rope with the plug out. Sometimes, this might be triggered by another problem that is impacting your system. The Housing is the outer cover of the starter, and if it is damaged, your chainsaw suffers stiffness during a pull. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. "@type": "InteractionCounter", I've done it to high hour Kohler engines many times. To ensure that enough air reaches the chain saw's engine, remove the air filter and clean or replace it, depending on the manufacturer's instructions. MS 260 - Robust chainsaw for forestry work - Stihl I bought 2 032 Stihl saws at auction that pulled very hard. Reddit and its partners use cookies and similar technologies to provide you with a better experience. I bought 2 032 Stihl saws at auction that pulled very hard. Hello D beatty, Here is a link for two stroke engine air cycle, Guido. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Over time or when using the wrong fuel, the fuel filter becomes too clogged and restricts fuel flow, killing the engine shortly after starting. Make sure the crank taper is clean and the flywheel taper also. Check for side play in the crankshaft. Would not be afraid to do it to a 4, 6, or V-8. 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. Press question mark to learn the rest of the keyboard shortcuts. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. 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. no, afraid I don't have equipment to test. How Much Compression Should a Chainsaw Have. Below we have discussed the most common reasons why your chainsaw wont idle and the best way to fix it. 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. The early 064, 044, 066 came with a red master control. It's an older saw I bought at a garage sale. Not sure it would accomplish anything on a 2-stroke chain saw engine. I'm also going to double check it has the correct resistor type spark plug. The manual for this model, and the parts breakdown, show a compression release valve. No compression when pulling start rope. or Best . Modern View Forum powered by phpBB 2001, 2005 phpBB Group. $99.95. So, If you feel too much compression while pulling a chainsaw, the possible reasons might be as below. Turn the engine to get under the piston and blow the crankcase out. 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 Would have to remove spark plug and rinse cylinder with gas to be able to start. The power of the motor of an engine is measured in its capacity. "logo": { Cleaned it all up, and had it tuned up. Sometimes an adapter is needed to make a tight fit. 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. 1. saw has new carb 2. flywheel has been removed and key inspected. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Chainsaw "Hard To Pull" Issues: Check & Fix (Within 5 Min) 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. 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. 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 chainsaw motor engine capacity can range from 30CC and 50CC to 150 CC. All it needs is a few inches missing and it will pull too hard like the compression is too high. Wash the dirty filter with a non-abrasive detergent and water. Press question mark to learn the rest of the keyboard shortcuts. Sparkplug was correct but I think it was a little flooded. Insert the air filter and the spark plug, reconnect the spark plug wire, and close the opening. An engine is fit on the rear side of a chainsaw. Fuel filters trap dirt and contaminants from the fuel to prevent them from damaging the engine. 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. lol. For a better experience, please enable JavaScript in your browser before proceeding. It works when cold-starting the engine, when the engine is idle and when the engine is open. Press J to jump to the feed. Pull trigger and set full choke. Clean any mildly dirty parts and replace all the damaged parts. You will notice the compression less. OEM GOOD USED STIHL 048AV CHAINSAW SHORT BLOCK ENGINE 120 PSI COMPRESSION. Even though it was purchased "brand new" I'm not so sure. Stihl 026 Chainsaw hard to crank - retrofit compression relief valve Sometimes, the ignition rope is frayed or stuck inside the starter housing. If it is hard to pull, then check how the spring is performing. }. Didnt somehow get straight oil in the cylinder did you? Check the tension 2. It's also possible the piston or cylinder are scored or carboned up. Posted December 27, 2017. Stihl MS250 Too High of Compression? - Arborist, Chainsaw & Tree Work Forum Drain and discard the old fuel, mix new fuel and cycle oil in the ratio 50:1 in a container, shake it and then pour the mixture into the chainsaws fuel tank. Some of the contributing reasons include a full tank of oil, carbon buildup on the exhaust system, and malfunctioning spark plugs. Ask him if he's drop-starting it. With the choke engaged, pull the starting rope several times again, and the chain saw should start on the third pull. Neighbor brought me his Stihl MS250 complaining that it tries to pull his arm from socket when starting. 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. I've done it to high hour Kohler engines many times. "interactionStatistic": { I used to have a Homelite that would do that if I left gas in it. I;ve read somewhere to put water? . Would not be afraid to do it to a 4, 6, or V-8. Use a can of carb cleaner sprayed into the breather/filter assembly. Then, use a wire brush to remove all the carbon build-up from the cylinder and piston.