It is possible however to flood a two stroke which can cause the plug to fowl. As long as I can get it going.. This article will help you fix the most commonly reported problems of a Stihl chainsaw. I went with a meteor piston/cylinder set. Stihl MS 250 Chain Saw: The pull start will barely move the flywheel. Below are the reasons the chain keeps coming loose and how to fix it. Always change the spark plug after 100 operating hours of the chainsaw to avoid engine problems. For 503552201 Cylinder Compression Plug Package Include: 3 x Cylinder Plug Cylinder Compression Plug Don't know what to do at this point. 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. 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. A hot engine also requires more compression to convert furl into energy as compared to the colder one. When the air that reaches the chain saw's engine is insufficient, it becomes prone to overheating. I luv my 064. You can also quickly fix this anomaly by ensuring a proper troubleshooting of the pulley compartment to find damages. In fact, Stihl thinks so highly of Motomix, that they will double the factory warranty on their Stihl 2-stroke tools if you use it. Detailed, well-researched, and accurate home and garden information presented in an understandable format is our primary goal. The power of the motor of an engine is measured in its capacity. Because of an absence of lubrication, the chain saw system becomes brittle, resulting in excessive compression of the chain saw mechanism. If there is any damage to the pulley at any stage, it will cause High Compression or stiffness during a pull.. I've seen a 20psi drop with the wrong type of gauge to be pretty common. "logo": { 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. 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. 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. The compression limit should also be doubled if the engine capacity is 100 CC. If it is the right sparkplug and not flooded, I would maybe buy a different saw with easy start. 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. "height": 57 Would not be afraid to do it to a 4, 6, or V-8. The chain clutch might be, Read More Cordless Chainsaw Wont StartContinue, The most common reason is simply the wrong battery. pulls with little resistance, similar to my farm boss. It runs good after I get it started. What worked with my MS440 kicking problem should also work with that one. I would never put water in it! When the fuel starts to turn stale, it gums up and clogs the carburetor just as it would in an unused lawnmower. Replace the spark plug with a new identical. You are misunderstanding WHY water is put into carboned up engines. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. On a 2 stroke the water would go into the crank case first and pool up. Runs well, except it. A flooded engine is when there is too much gas in the combustion chamber, usually due to repeatedly starting the chainsaw using the recoil system without the engine starting. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. When it comes to compression values, those between 90 and 110 psi are deemed to be acceptable. Im Nelson, a DIY enthusiast with a bottomless can-do attitude. It's an older saw I bought at a garage sale. I would suspect the timing is too early. or Best . I love to write about chainsaw for homeowners and professionals. link to Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. chain saw compression release mod. How Much Compression Should a Chainsaw Have. However, if I push downward on the trigger button, it slows down to. I changed to synthitic. If oil is in there it is what makes the engine feel like it is almost locked up. If you find the brake drum moving, you must replace the needle bearing. If not I'm honestly kinda stumped. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. Just wondering what your opinions are of the lowest compression you can run a Stihl MS250 at. ", Follow the steps below on how to fix a flooded chainsaw engine. 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. Other Professional Battery-Powered Chainsaws We Recommend: Stihl MSA 220 C-B 36V 16-inch Chainsaw: Solid design and increased power backed by Stihl's dealer network. The saw is about 2 years old, light use. Required fields are marked *. Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. I would never put water in it! Then, use a wire brush to remove all the carbon build-up from the cylinder and piston. The chainsaw motor engine capacity can range from 30CC and 50CC to 150 CC. Check for broken teeth on the chain and replace them if necessary. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. It would give you rusted bearings. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. 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. How Many Amps Does a Garage Door Opener Use? Pull trigger and set full choke. Stihl 291 chainsaw too much compression Check the compression of the engine. Ensure the chain fits snugly inside of the bar and the teeth that keep it in place are not worn down too low. If your chainsaws cylinder and piston have a lot of carbon build-up, it can cause the chainsaw to have high compression. Consequently, operating this chainsaw becomes a really difficult chore to do. I hook up a drill to the nut on the clutch and start hard starting saws that way . If any of these components are worn or broken, the chain saw wont start even with fuel. "name": "Yesterday's Tractor Co.", The first step is to remove the cover that covers the spark plug on your chainsaw. Temperature Of The Engine A heavy-duty engine gets hot faster and works better than a cold engine. I was given (estate) a small McCulloch chain saw and it started and ran great. 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. I would suspect the timing is too early. "userInteractionCount": 23 If your chainsaw doesnt automatically turn it off or you forget, the engine cuts off immediately. Your chainsaws compressive strength is measured with the use of a screw-in gauge. Youre familiar with how to start a stihl yes? Not sure it would accomplish anything on a 2-stroke chain saw engine. Friction is usually the cause of a rope failing to draw when it should. Press question mark to learn the rest of the keyboard shortcuts. Save my name, email, and website in this browser for the next time I comment. I would never put water in it! Every chainsaw needs to have some compression to ensure that it operates well. I got it started. You need to pull the exhaust to check that. However, you still have to confirm the size of the gap before installing. Take off the muffler or the carb to get access. If a chainsaw has a 2 stroke engine, then the maximum compression it requires is 110-130 PSI. 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. Would have to remove spark plug and rinse cylinder with gas to be able to start. Any ideas? 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 repeated cleaning does not fully unclog the carburetor, you will have to replace it. The carburetor sucks fuel from the tank, mixes it with the right amount of air, and pushes the mixture into the combustion chamber. or Best Offer. Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. A chainsaw engine generates this compression through the explosion of the fuel in the combustion chamber and the movement of the crankcase. My question is what is causing the trigger to not slow down. Repair or replace the damaged part 2. Check for any cracks and damages and replace if necessary. The plug should be tight against your thumb. What is the minimum compression for my STIHL chainsaw? There are sprays (power tune) for removing carbon, but I doubt if that's your problem. 1. saw has new carb 2. flywheel has been removed and key inspected. Lift the bars nose and tighten the nuts on the sidebar to secure the sidebar and guide bar in place. Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. Check for clogging around the bar oil. Your ignition rope must be intact properly with the pulley to work correctly. Stihl chainsaw compression test Joe_Power Jun 2, 2015 Not open for further replies. 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?? I think that's what I'd do. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. It is harmful to your machine to use old fuel. Pour starting fluid into the carburetor and crank the engine several times. 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. It can be from something as simple as starting the chainsaw wrongly to more severe issues like a damaged carburetor. Generally the minimum is 110 lbs. If the rails are shallow, you need to replace them. Turn off the choke by pressing the control lever to activate the fast idle. "image": { I have a MS250 that has come up on compression since new. No carbon on top or on roof of cylinder. Dont substitute it with. A lot of variables might contribute to excessive compression while using a chainsaw. Not sure it would accomplish anything on a 2-stroke chain saw engine. The ignition coil transmits electricity to the spark plug to create a spark that ignites the engine. $99.95. or very unlikely but happened to me on an 041 make sure the crank hasn't shifted and started to bind. Remove the air filter, wash it with detergent and water and scrub off the dirt with a brush. I've got four other Stihl saws here, an 029, 036Pro, 015L, and an MS200T, only the 36Pro pulls this hard and only if I don't use the decomp button. Final step: removing the old spark plug and installing the new one. Why is the Garage Door Opener Light Not Working? 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 early 064, 044, 066 came with a red master control. "dateModified": "2017-08-17", If the compression is not produced in the engine at an appropriate level, it will not be able to convert fuel into energy. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. If the coil is faulty, there will be no spark to start the engine and run the chainsaw. Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. 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. 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. All it needs is a few inches missing and it will pull too hard like the compression is too high. "text": "My chainsaw has gotten very hard to pull the rope. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V. Also check the air filters and make sure they are clean. Check for clogged shafts and jets, clogged carburetor, damaged valves, stuck levers, and damaged or warped diaphragms, all of which can interfere with the fueling process. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. runs way too fast. 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! You are using an out of date browser. } I bought 2 032 Stihl saws at auction that pulled very hard. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. Remove the filter, engine control lever and Stihl carburetor. The vibration of the tool during use can run some fasteners loose, preventing it from starting again. A problem in the ignition system is likely to be the culprit when the chainsaw doesnt spark. Are you sure the starter rope isn't a little too short? If it has damaged parts, replace it with a carburetor kit that fits your chainsaw model. NelsGarage will share the knowledge Ive gathered about different tools and give you tips to accomplish your DIY projects faster. Create an account to follow your favorite communities and start taking part in conversations. Unscrew the spark plug using a ratchet and screw the compression gauge in its place. 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. For a better experience, please enable JavaScript in your browser before proceeding. 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. Compression gauges are not always accurate and different engines will provide different results. Replace with a new starter house Problem 2: Damaged pulley system Solution: 1. All it needs is a few inches missing and it will pull too hard like the compression is too high. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. On a 2 stroke the water would go into the crank case first and pool up. If you notice the treads are worn, which prevents the device from pumping, replace it with a new one. "author": { When your Stihl chainsaw doesnt start after changing the spark plug and fuel, some common problems to look for can help diagnose the source of the issue. 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?? In addition, you should check the muffler and piston while youre at this point. There is no idle when I release the trigger. 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 Sometimes, this might be triggered by another problem that is impacting your system. in the, All Rights Reserved. Sparkplug was correct but I think it was a little flooded. You never try to get it to run with the choke on. The engine creates a vacuum pressure inside it. The end of the tester must protrude exact the same volume into the cylinder as the spark plug or the reading will be wrong. $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 of compression. Check for side play in the crankshaft. I'll even do the labor for free. #3. Ron Cook. A drastic and frankly silly thing to do though . You will notice the compression less. Wash the dirty filter with a non-abrasive detergent and water. 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. 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 Hello D beatty, Here is a link for two stroke engine air cycle, Guido. "interactionStatistic": { An example of data being processed may be a unique identifier stored in a cookie. I would suspect the timing is too early. A clogged carburetor wont allow fuel into the engine, preventing it from starting. Turn the idle speed clockwise until the saw idles and chain turns, and then make a one-fourth counterclockwise turn. Quoting Removed, click Modern View to see Don't put water in the saw-ever. Also check the air filters and make sure they are clean. A smaller gap will cause a weak spark and poor ignition of the engine, while a wider gap will not bring out any spark. Once it's removed, you can place a gauge on the place of the spark plug. As the chain moves over the bar, it spreads the oil across the moving parts to reduce friction and heat. Reassemble the chainsaw, refill the fuel tank, crank the engine and check for oil along the bar. If I drop start it I can pull it through 1 compression stroke. Remove the right side cover, bar, and chain. Sounds flooded, or maybe wrong sparkplug? Don't know what to do at this point. Get you some Sea Foam at the local auto parts store. The Housing is the outer cover of the starter, and if it is damaged, your chainsaw suffers stiffness during a pull. Are you sure the starter rope isn't a little too short? It uncoils, tightens the spring, engages the clutch to start the engine. Does the saw have a compression release? When it comes to power tools, good maintenance, and proper use will maintain the functionality and lifespan of the tool regardless of whether it is an electric miter saw or a gas power chainsaw. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . Stihl recommends using 89 octane gasoline without ethanol, and the gas should not contain more than 10% ethanol. Low pressure, 20 to 30 pounds is all you need. The second thing, Read More Stihl Chainsaw Charger Not WorkingContinue, Your email address will not be published. Ask him if he's drop-starting it. What usually happens is that the guide bar gets stuck in the tree and they keep running the engine while trying to force the bar out of the tree somehow. 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. 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. You need to pull the exhaust to check that. 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. You're familiar with how to start a stihl yes? Wipe off the excess fuel from the spark plug with a clean rag. If the chainsaw is too little compression, it may start easily but will not run smoothly. Once you identify the cause of high compression, you can repair that affected part or find a new replacement for it to make it work smoothly. Ensure the wires leading to the On/Off switch are not tangled or in contact with the metal part of the engine if there is no spark. Of all the Stihl saws, the MS250 is the toughest to start in relation to it's size. Afterward, the beginning rope is pulled repeatedly until the gauge comes to a full stop on its own. I've done it to high hour Kohler engines many times. Here is how to troubleshoot a malfunctioning spark plug. Step 1: Prepare the chainsaw Remove the spark plug from the chainsaw. Are you sure the starter rope isn't a little too short? Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. or Best Offer. There is no carbon build up and all looks like new. The Stihl 066 chainsaw uses the same type of engine most gasoline-powered yard tools use, a two-cycle combustion engine. Try it, it may just do the trick! Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. If it has to do with small engines, it's welcome here. 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. How Much Does it Cost to Install a Garage Door Opener? The chainsaw motor engine capacity can range from 30CC and 50CC to 150 CC. Cylinder Compression Plug Applicable Model For STIHL 021, 023, 024, 025, 026, 044, 046, 066, MS210, MS230, MS240, MS250, MS260, MS341, MS360, MS440, MS460, MS650, MS660 Chainsaw Parts Refer To Part No. 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. If it does maybe it is plugged. (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 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. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. after that I'd be looking at crank bearings. 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. Hold the tip of the blade and adjust the tension of the chain correctly. let it idle over lunch, just made sure to not go too long between filling it with gas, while running of course. You have an option to either pull off the starter and clean it or look for an ideal replacement for your starter house. 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. Cleaned it all up, and had it tuned up. I hook up a drill to the nut on the clutch and start hard starting saws that way . Disconnect the spark plug from the engine and inspect if it is damaged, eroded, or dirty. 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. However, these moving parts, to stay moving, require a substantial amount of compression. A 50CC engine needs 150 PSI compression. It may not display this or other websites correctly. water will not dissolve carbon; it is far too hard to be effected. I missed the "no carbon". Not sure it would accomplish anything on a 2-stroke chain saw engine. 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! Also, remove the muffler and check for carbon buildup. The plug should be tight against your thumb. The chain oil will keep the chain lubricated, keep off dirt and allow smooth movement. The key on the flywheel is in place and not sheered. Getting these problems resolved is a rather straightforward process. Cleaned air filters and both were very dirty. Thanks. I can probably find one with at most 65 PSI. This is because your oil is not rated to get to work at a low temperature. Yes I tried that last time and it did help some. Being in the cutting services for more than 10 years, I know a thing or two about chainsaw. Pull trigger and set full choke. If that doesnt work, try gently tapping on the side of the bulb with a screwdriver or other tool. Check the choke of the chainsaws engine and make sure it is completely closed. Carboned rings will decrease not increase compression. Then Google "decarb". Winterizing a pool is an important step in maintaining the longevity and health of your pool. First thing I'd check is the pull start assy. Rinse the filter and allow it to air dry before reinstalling it. Let saw run until its warmed up, and go cut wood. water will not dissolve carbon; it is far too hard to be effected. 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. Choke cannot be used even when engine cold, or flooding occurs. If this does not fix the issue, it may be necessary to replace the whole starting rope system with another one. Any ideas? The piston and rings are very shiney. }, The compression limit should also be doubled if the engine capacity is 100 CC.