stihl chainsaw too much compression

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. If the chainsaw is too much compression, it may be difficult to start. 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. 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. or Best Offer. It is significantly tougher to pull over than an 024 or the new 241. Would have to remove spark plug and rinse cylinder with gas to be able to start. If it is too damaged, you should replace it. Not sure it would accomplish anything on a 2-stroke chain saw engine. Try it, it may just do the trick! Other than that, you should also use the correct spark plugs for your chainsaw. 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. Starting fluid will make the fuel more combustible and makes the process of clearing out the combustion chamber much quicker. Check the saws exterior for loose bolts, nuts, and screws and tighten them with an adjustable wrench or screwdriver. A very loose chain will cause the blades to come out of the bar, while a very tight chain is also not ideal for the proper functioning of the chainsaw. An engine is fit on the rear side of a chainsaw. I got it going. We have explained the most effective way to unflood a chainsaw engine below. Your ignition rope must be intact properly with the pulley to work correctly. or very unlikely but happened to me on an 041 make sure the crank hasn't shifted and started to bind. Ok folks, I'm stumped. Usually, this happens when you use a chainsaw after a very long time or by wear and tear of the rope. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. Register today and take advantage of membership benefits. 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. For a better experience, please enable JavaScript in your browser before proceeding. I bought 2 032 Stihl saws at auction that pulled very hard. Then Google decarb . Unscrew the clutch assembly on top of the oil pump. Carboned rings will decrease not increase compression. Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. water will not dissolve carbon; it is far too hard to be effected. It would give you rusted bearings. Didnt somehow get straight oil in the cylinder did you? Insert the air filter and the spark plug, reconnect the spark plug wire, and close the opening. That model is extremely easy to flood. First thing I'd check is the pull start assy. We and our partners use cookies to Store and/or access information on a device. 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. I have a MS250 that has come up on compression since new. Any ideas? When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. As the starter, spring plays a vital role in running starter assembly smoothly. Check the chain tension and adjust it if it is too loose or tight. Wash the dirty filter with a non-abrasive detergent and water. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. "@type":"DiscussionForumPosting", Quoting Removed, click Modern View to see What?? "name": "Egbinor" Use of this Web site constitutes acceptance of our. Carboned rings will decrease not increase compression. 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. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . So be sure to keep your chainsaw properly maintained and avoid compression problems. Uninstall the spark arrestor and unblock it using a brush, but you can also replace it for efficiency. When this comes to a stop, it will come to a complete stop at a certain number, which is the compression of your chainsaw blade. I love to write about chainsaw for homeowners and professionals. It is, therefore, necessary to determine if the problem has been remedied by adding fresh fuel. Stihl 291 chainsaw too much compression Check the compression of the engine. 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. Also take the spark plug out and do the same. 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. There is no carbon build up and all looks like new. My name is Chris Ross. I used to have a Homelite that would do that if I left gas in it. All it needs is a few inches missing and it will pull too hard like the compression is too high. A two-stroke gas-powered chainsaw uses relatively few moving parts. You are misunderstanding WHY water is put into carboned up engines. I'm hearing thats just the nature of the beast. The exhaust is black but no build up. But the saw just has a rubber piece on the top shroud with a slotted nut that just fastens it to a stud on the cylinder head, where the valve should be. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Loosen the nuts and bolts clockwise and then pull out the oil pump gently. On a 2 stroke the water would go into the crank case first and pool up. I would suspect the timing is too early. Replace the spark plug with a new identical. For the chainsaw to function appropriately, you must maintain the proper amount of tension on the chain. If it is hard to pull, then check how the spring is performing. You can unclog the carburetor if the clog is minor. Mar 22, 2017. what and or where is the metering lever.? I've done it to high hour Kohler engines many times. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. If it does maybe it is plugged. This could be understood by reading the further explanation below. "name": "Yesterday's Tractor Co.", After that, using a ratchet, remove the spark plug from the engine. A 250 has a fair amount of compression for a smaller saw but not that bad. Getting these problems resolved is a rather straightforward process. The other reason might be the use of the wrong type of oil for the climate. Not sure it would accomplish anything on a 2-stroke chain saw engine. I'll even do the labor for free. Fine adjust everything and both saws start Normal now. If a chainsaw has a 2 stroke engine, then the maximum compression it requires is 110-130 PSI. Can anyone make a suggestion. It would give you rusted bearings. It is best to put a new plug in after clearing. You need to pull the exhaust to check that. "@id": "https://www.yesterdaystractors.com/" Wipe off the excess fuel from the spark plug with a clean rag. How Much Compression Should a Chainsaw Have. 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. Here is a link for two stroke engine air cycle. If you suspect a compression issue, seek professional help as compression repairs can be complicated. Try taking it out, Then holding the trigger while you pull fast. If any of these components are worn or broken, the chain saw wont start even with fuel. He checked.it clearly says that in the OP. Compression gauges are not always accurate and different engines will provide different results. 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. We're all about fixing small engines, from carburetor rebuilds, to crankshaft machining. A smaller gap will cause a weak spark and poor ignition of the engine, while a wider gap will not bring out any spark. I got it started. It is thus highly recommended that you drain the fuel from your chainsaw if it still has any old gasoline left in it. If I drop start it I can pull it through 1 compression stroke. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. 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. If the air filter is too clogged, you should replace it. I went with a meteor piston/cylinder set. 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. The flywheel is loose? The Stihl 066 chainsaw uses the same type of engine most gasoline-powered yard tools use, a two-cycle combustion engine. Even though it was purchased "brand new" I'm not so sure. Check the tension 2. Pull the starter rope until you hear the first sign of it firing with a small burp. let it idle over lunch, just made sure to not go too long between filling it with gas, while running of course. 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. 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. Pull the rope until it starts. 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. Remove the filter, engine control lever and Stihl carburetor. Sounds like it was broken in "right", show the guy how to start it and tell him to be happy. It may not display this or other websites correctly. To avoid flooding the chainsaw when cold starting, turn the control lever to half choke after the fourth pull and then turn the lever again to the open choke position immediately when the engine starts. Neighbor brought me his Stihl MS250 complaining that it tries to pull his arm from socket when starting. Another big issue that causes too much high compression is the lack of oil in the starter system. That would have to be some puddle of oil for a MS250 to have a "bar oil leaking in and causing high compression problems" What kind of Stihl oil regular or synthitc, had an 025 years ago that was a real knuckel buster never checked compression but was using regular Stihl oil. I changed to synthitic. Other than damaged parts, using the choke position to start a warm saw often causes a flooded engine. Follow the steps below on how to fix a flooded chainsaw engine. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. In a similar vein, if the wrong kind of oil is used, the compression may be increased. You can clean and mildly clogged carburetor but if it is too severe, replace it with one compatible with your chainsaw model. }, Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. 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. As long as I can get it going.. Final step: removing the old spark plug and installing the new one. 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. Hello D beatty, Here is a link for two stroke engine air cycle, Guido. Don't put water into the 2 stroke. Fuel filters trap dirt and contaminants from the fuel to prevent them from damaging the engine. This is bad practice, and can damage your chainsaw. 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. If it does maybe it is plugged. The piston and rings are very shiney. In most cases, a buildup of carbon under the rings presses the rings against the cylinder, culminating in compression of the cylinder. By checking & repairing/replacing these, you can fix the issue. "description":"Discussion of Chainsaw has too much compression in the Tool Talk forum followed by comments. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. John Deere and its logos are the registered trademarks of the John Deere Corporation. The consent submitted will only be used for data processing originating from this website. Turn the engine to get under the piston and blow the crankcase out. Fine adjust everything and both saws start Normal now. Turn the engine to get under the piston and blow the crankcase out. The spark arrestor in a chainsaw traps exhaust products emitted from an internal combustion engine. 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. First, remove the cylinder and piston from the chainsaw. Try blowing the crankcase out with air. You never try to get it to run with the choke on. 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. 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. As the chain moves over the bar, it spreads the oil across the moving parts to reduce friction and heat. I would suspect the timing is too early. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. On a 2 stroke the water would go into the crank case first and pool up. Change in temperatures and dirt will cause clogging anywhere the oil passes, and this can prevent the oil from spread all across the bar. Sometimes, the ignition rope is frayed or stuck inside the starter housing. 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!!! Carboned rings will decrease not increase compression. If you regularly use the chainsaw, then there might be the possibility that your starter spring breaks off. "@context":"https://schema.org", That is the nature of a 250. What is the minimum compression for my STIHL chainsaw? That is what was told to me by the area distributor technician That is the nature of a 250. Oct 7, 2019 / Minimum compression for a Stihl 2 cycle #3 the actual numbers will vary from one tool to another Getting accurate numbers without special tools is quite difficult because of the small volumes. You are misunderstanding WHY water is put into carboned up engines. Generally the minimum is 110 lbs. Any ideas? A hot engine also requires more compression to convert furl into energy as compared to the colder one. I luv my 064. Does the saw have a compression release? 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. If A two cycle engine gets flooded BADLY, oil can separate from the gas mix, accumulate in the crankcase and creates an hydrostatc lock. The spark plug is located in the engine and ignites the fuel and air mixture, driving the piston and running the engine. When the fuel starts to turn stale, it gums up and clogs the carburetor just as it would in an unused lawnmower. My question is what is causing the trigger to not slow down. Would have to remove spark plug and rinse cylinder with gas to be able to start. It's from not pulling hard enough. Once it's removed, you can place a gauge on the place of the spark plug. Stihl MS290 MS390 MS310 Chainsaw Has Oil Tank Engine Housing Assembly OEM/ Bin G . 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. Remove the spark plug with a spark plug wrench and clean it with a brush to remove carbon scoring and dirt. It is effortless to check the starter spring; pull the ignition rope. Turn the engine to get under the piston and blow the crankcase out. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. I've seen it happen a couple times. Would not be afraid to do it to a 4, 6, or V-8. Mar 24, 2019. Admitted Woodaholic. "@type": "InteractionCounter", If there is any damage to the pulley at any stage, it will cause High Compression or stiffness during a pull.. I've done it to high hour Kohler engines many times. Use recommedend chain oil lubricant. Make sure there is oil in the engine. When you are doing a cold start, push the choke lever to the warm start when the engine starts to run. Soaking in water will do nothing but rust things up . Most fuels nowadays are a blend of ethanol which attracts moisture and speeds up the rotting process. Step 1: Prepare the chainsaw Remove the spark plug from the chainsaw. How Much Does it Cost to Install a Garage Door Opener? Sometimes, this might be triggered by another problem that is impacting your system. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. "@type": "Person", 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 We will explain the causes of high compression and how you can quickly fix it to make it run smoothly. Afterward, the beginning rope is pulled repeatedly until the gauge comes to a full stop on its own. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. Although this is often true, it is not always the case. Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. Low pressure, 20 to 30 pounds is all you need. However, these moving parts, to stay moving, require a substantial amount of compression. Similarly, a 4-stroke engine needs 2 times more compression than a 2-stroke engine, around 180-210 PSI. If repeated cleaning does not fully unclog the carburetor, you will have to replace it. Every chainsaw engine has a different capacity depending upon its motor power. "width": 200, 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. Every chainsaw needs to have some compression to ensure that it operates well. Reassemble the chainsaw, refill the fuel tank, crank the engine and check for oil along the bar. The carburetors work in a chainsaw engine allows the right amount of fuel and air mixture into the combustion chamber. Move the selector lever up one position immediately or the saw will flood on the very next pull. If it looks physically fine after cleaning it and you havent changed it in a few seasons, you should still replace it. If not I'm honestly kinda stumped. 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. Ron Cook. Does the saw have a compression release? Sounds flooded, or maybe wrong sparkplug? Over time, soot from the engine clogs up the spark arrestor causing the chainsaw to stall. You can prevent the new starter rope from fraying by burning the two ends of the rope. Then, use a wire brush to remove all the carbon build-up from the cylinder and piston. in the, All Rights Reserved. Sometimes it kicks and the rope pulls right out of my hand. Wipe off any flammable fluid from the metal surface of the engine with a clean rag. Do that to the starter side when you're looking at the starter assy. Modern View Forum powered by phpBB 2001, 2005 phpBB Group. A clogged carburetor wont allow fuel into the engine, preventing it from starting.

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