I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. Make sure the gap is according to the specifications of your chainsaws engine. Its just that its nearly impossible to pull. Repair or replace the damaged part 2. or Best Offer. Your email address will not be published. Pull the recoil off and check for binding Pull rope or starter pawls misaligned. Starter fluids spray can help in those conditions Before pulling shoulder. If you find the brake drum moving, you must replace the needle bearing. 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. Not sure it would accomplish anything on a 2-stroke chain saw engine. Stihl MS290 MS390 MS310 Chainsaw Has Oil Tank Engine Housing Assembly OEM/ Bin G . Then Google decarb . To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. It was easier to pull after I cleaned it up, but still tough. Replace with a new starter house Problem 2: Damaged pulley system Solution: 1. How Many Amps Does a Garage Door Opener Use? We and our partners use cookies to Store and/or access information on a device. My /Sthil 034 is very difficult to start. Don't put water into the 2 stroke. We are compensated for referring traffic and business to Amazon and other companies linked to on this site. 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. Subsequent starts are just as hard. Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. Reassemble the chainsaw, refill the fuel tank, crank the engine and check for oil along the bar. Once the 250 is running, its fine. Compression is measured by using a simple screw-in gauge. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. All it needs is a few inches missing and it will pull too hard like the compression is too high. 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. Carboned rings will decrease not increase compression. Doesnt pull at all or just hard to pull. Try blowing the crankcase out with air. Quoting Removed, click Modern View to see Don't put water in the saw-ever. Guido Quoting Removed, click Modern View to see What?? It can be from something as simple as starting the chainsaw wrongly to more severe issues like a damaged carburetor. Any chance is it hydro locking because of gas? 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. It is thus highly recommended that you drain the fuel from your chainsaw if it still has any old gasoline left in it. Some of the contributing reasons include a full tank of oil, carbon buildup on the exhaust system, and malfunctioning spark plugs. The chainsaw motor engine capacity can range from 30CC and 50CC to 150 CC. When there is no air for the spark to ignite, the chainsaw will start and then die after a short while. 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. Unscrew the clutch assembly on top of the oil pump. Continue with Recommended Cookies. That is what was told to me by the area distributor technician, 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. Maybe the piston is hitting it. "width": 200, The exhaust side of the piston is a warm gold. NelsGarage.com All Rights Reserved 2021 Theme: Prefer by, Stihl Chainsaw Troubleshooting & How-to Guide. Press J to jump to the feed. Then Google "decarb". This article will help you fix the most commonly reported problems of a Stihl chainsaw. But it was stolen along with other tools around 1990. The chainsaw motor engine capacity can range from 30CC and 50CC to 150 CC. If anything prevents the right amount of fuel into the combustion chamber, the chainsaw 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?? or very unlikely but happened to me on an 041 make sure the crank hasn't shifted and started to bind. When the motor warms up after about a minute, turn on the choke position. 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! Winterizing a pool is an important step in maintaining the longevity and health of your pool. It runs good after I get it started. It takes a Bosch WSR6F or NGK BPMR7A. Our aftermarket suitable replacement Stihl MS 250 C chainsaw compression release parts meet or beat OEM specs, offer a considerable cost savings, and usually ship in 24 - 48 hours. Are you sure the starter rope isn't a little too short? No carbon on top or on roof of cylinder. Locate the spark plug from the top of the engine underneath the chain brake handle. Every chainsaw needs to have some compression to ensure that it operates well. With the choke engaged, pull the starting rope several times again, and the chain saw should start on the third pull. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. Low pressure, 20 to 30 pounds is all you need. 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. In a similar vein, if the wrong kind of oil is used, the compression may be increased. Check the choke of the chainsaws engine and make sure it is completely closed. If so, show him how to start it on the ground with his foot in it or with the rear handle between his thighs. Thanks! 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. Sounds like it was broken in "right", show the guy how to start it and tell him to be happy. Ron Cook. Once it's removed, you can place a gauge on the place of the spark plug. The switch might be damaged or the motor is burned out. When the fuel starts to turn stale, it gums up and clogs the carburetor just as it would in an unused lawnmower. "logo": { Also take the spark plug out and do the same. 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. A problem in the ignition system is likely to be the culprit when the chainsaw doesnt spark. I've done it to high hour Kohler engines many times. After initial pull on rope (which feels like vapor lock on cylinder), saw will start on second or third pull. I'm also going to double check it has the correct resistor type spark plug. 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. I bought it used around 1978. So be sure to keep your chainsaw properly maintained and avoid compression problems. It prevents the carburetor from allowing too much fuel into the combustion chamber. The vibration of the tool during use can run some fasteners loose, preventing it from starting again. So, If you feel too much compression while pulling a chainsaw, the possible reasons might be as below. Hold the tip of the blade and adjust the tension of the chain correctly. Wipe off any flammable fluid from the metal surface of the engine with a clean rag. Thus far, you have learned how to diagnose most problems with the Stihl chainsaw and how to fix the issues. The power of the motor of an engine is measured in its capacity. Would not be afraid to do it to a 4, 6, or V-8. Find the low speed, high speed, and idle speed screws near the carburetor, start the engine and allow it to warm up. Im Nelson, a DIY enthusiast with a bottomless can-do attitude. link to Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. Each chainsaw has a different level of compression. idle. Therefore, it does not need any compression rate to start. Clean any mildly dirty parts and replace all the damaged parts. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. Consequently, always use the right oil and make sure that your chain saws starting mechanism is lubricated to prevent excessive compression while starting the saw. 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. Follow the steps below on how to fix a flooded chainsaw engine. 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. You are using an out of date browser. Remove the spark plugs and the e-clips attached to the sprocket on the engine shaft. 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. Chainsaws are very powerful tools, and if theyre not properly maintained, they can easily overcompress the chain, which can cause it to break. Create an account to follow your favorite communities and start taking part in conversations. 1. saw has new carb 2. flywheel has been removed and key inspected. In addition, you should check the muffler and piston while youre at this point. Carboned rings will decrease not increase compression. Whether you are a beginner or a professional woodworker, knowing how to fix your chainsaw will save you time and money seeking help from a service center. NelsGarage will share the knowledge Ive gathered about different tools and give you tips to accomplish your DIY projects faster. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. Sometimes it kicks and the rope pulls right out of my hand. If the rails are shallow, you need to replace them. If the chainsaw wont stay running when the engine is idle, adjust the carburetor. 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. The other cause of your chainsaws high compression could be the stuck ignition rope. It will be apparent if it is, but usually a scored saw won't run good, if at all. Remove the air filter cover and then slide off the rubber spark plug connector from the spark plug. You need to pull the exhaust to check that. If repeated cleaning does not fully unclog the carburetor, you will have to replace it. That model is extremely easy to flood. Are you sure the starter rope isn't a little too short? 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. Posted December 27, 2017. Remove the filter, engine control lever and Stihl carburetor. A chainsaw Battery blinking red is one of the most frustrating things a woodcutter can, Read More How To Fix Chainsaw Battery Charger Blinking Red?Continue, The standard compression reading required for most 2-cycle chainsaw is around 100-110 psi to start. The second thing, Read More Stihl Chainsaw Charger Not WorkingContinue, Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. An engine is fit on the rear side of a chainsaw. People sometimes try to cut down a tree that is too big for their chainsaw. The recoil starter in a chainsaw is a start mechanism that allows you to pull the rope. A clear sign that you may have a chainsaw engine is when you smell gas while starting it. Tighten the tension screw with a screwdriver to tighten the chain around the bar. I would suspect the timing is too early. Refill the chain oil by opening the cap on the chain oil tank, filling up the tank until the level is below the cap threads, and then replace the lid. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. "name": "Yesterday's Tractor Co.", Currently I live in Austin, United States. Insufficient fuel in the system may result in excessive compression. Check the tension 2. Yeah, I must have flooded it as I was working on it. Please use the navigational links to explore our website. All it needs is a few inches missing and it will pull too hard like the compression is too high. 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. Sounds flooded, or maybe wrong sparkplug? SPONSORED. 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. 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. Then Google decarb . "url": "https://www.yesterdaystractors.com/graphics/smllogo.png", The early 064, 044, 066 came with a red master control. How To Fix Chainsaw Battery Charger Blinking Red? 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. If the air filter is too clogged, you should replace it. There is no idle when I release the trigger. The carburetors work in a chainsaw engine allows the right amount of fuel and air mixture into the combustion chamber. 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?? If you recently refueled your Stihl chainsaw, stale gas can be a reason why it wont start. Other than that, you should also use the correct spark plugs for your chainsaw. Could your gauge be off a little? The ignition system is responsible for igniting the fuel and air mixture to produce energy that powers the chainsaw. Does the saw have a compression release? Cleaned it all up, and had it tuned up. Required fields are marked *. Even though it was purchased "brand new" I'm not so sure. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. So, replacing the ignition rope is a better option to keep everything working smoothly without any damage. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. I would suspect the timing is too early. 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. It's from not pulling hard enough. Create an account to follow your favorite communities and start taking part in conversations. water will not dissolve carbon; it is far too hard to be effected. JavaScript is disabled. everything is harder in a tree, not a conclusive test. Unscrew the spark plug using a ratchet and screw the compression gauge in its place. I;ve read somewhere to put water? By getting your pool ready for the winter, you can make sure it will be ready to use in the spring. 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. 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. I love to write about chainsaw for homeowners and professionals. 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. I get it going now and its easier but its still a bear. Why is the Garage Door Opener Light Not Working? It is a prevalent issue and can be fixed and detected easily without consulting a mechanic. Are you sure the starter rope isn't a little too short? I'm hearing thats just the nature of the beast. water will not dissolve carbon; it is far too hard to be effected. Rinse the filter and allow it to air dry before reinstalling it. If it looks physically fine after cleaning it and you havent changed it in a few seasons, you should still replace it. Versions MS 260, Bar length 37cm, RSC 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 ideal pressure range of the Stihl chainsaw is between 90 and 110 psi. i have a ms 250. Loosen the nuts holding the clutch cover and disconnect the chain shroud and remove the oil plate. Ok folks, I'm stumped. }. "width": 200, If it does maybe it is plugged. 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. First, remove the spark plug from the chainsaw. A 50CC engine needs 150 PSI compression. Get you some Sea Foam at the local auto parts store. Free shipping. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright . John Deere and its logos are the registered trademarks of the John Deere Corporation. 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. If oil is in there it is what makes the engine feel like it is almost locked up. "height": 57 Over time, soot from the engine clogs up the spark arrestor causing the chainsaw to stall. Being new carb, wasn't looking that direction educate a non mechanic. ProTip: You can use a small air compressor to blow air through the air filter and get rid of the loose dust before proceeding to clean it further. 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. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. 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. "@type": "Organization", Soaking in water will do nothing but rust things up . 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. "@context":"https://schema.org", The exhaust is black but no build up. $75.00. Confirm the spark plug gap, check and adjust with a feeler gauge or gaping tool. Does the saw have a compression release? The excess gas can be cleared simply by removing the plug and operating the starter a few times. Try it, it may just do the trick! You're familiar with how to start a stihl yes? Pour starting fluid into the carburetor and crank the engine several times. Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. Make sure it's greased and the bushings are good. As the chain moves over the bar, it spreads the oil across the moving parts to reduce friction and heat. $49.99. "author": { Hello. It would give you rusted bearings. Stihl recommends using 89 octane gasoline without ethanol, and the gas should not contain more than 10% ethanol. If any of these components are worn or broken, the chain saw wont start even with fuel. If A two cycle engine gets flooded BADLY, oil can separate from the gas mix, accumulate in the crankcase and creates an hydrostatc lock. Keep in mind that good maintenance and storage will reduce breakdowns and maintain your tools performance throughout its lifetime. When you start the chainsaw, it triggers the worm drive to engage the oiler to send oil through a port that releases onto the bar. Typically, several reasons cause too much compression in a chainsaw and these include but are not limited to: Old contaminated chainsaw fuel Chainsaw Starter rope issues Faulty spark plugs Chainsaw Carbon buildup Insufficient Chainsaw Oil Old and contaminated fuel Not sure it would accomplish anything on a 2-stroke chain saw engine. Advanced arborist chainsaw with a top handle and STIHL M-Tronic technology. Wipe off any dirt and debris and check for any signs of damages. Take off the muffler or the carb to get access. "name": "Egbinor" The plug should be tight against your thumb. "@type": "InteractionCounter", It would give you rusted bearings. If it has damaged parts, replace it with a carburetor kit that fits your chainsaw model. If oil is in there it is what makes the engine feel like it is almost locked up. Don't put water into the 2 stroke. Check the saws exterior for loose bolts, nuts, and screws and tighten them with an adjustable wrench or screwdriver. Most of the time, the chainsaw cord became hard to pull because of the Starter Housing. In other words, the problem is in the trigger itself, not a. carb adjustment screw. Use a screw wrench to loosen the nuts on the guide bar side panel to give you room to adjust the chain. Yes I tried that last time and it did help some. 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. The lack of oil dries the chainsaw assembly, which causes high compression and becomes very difficult for you to handle the chainsaw. Youre familiar with how to start a stihl yes? { The purpose of a choke in a chainsaw is to make cold starting more effortless, but if you do not use it properly. 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. This may sometimes jam your chainsaws rings, causing it to become inoperable. You need to pull the exhaust to check that. You will notice the compression less. Turn the brake off. No compression when pulling start rope. I tried draining the crankcase with the saw upside . It may not display this or other websites correctly. 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. He checked.it clearly says that in the OP. Normally it's not a problem but if it was already difficult to pull it could be. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. If this does not fix the issue, it may be necessary to replace the whole starting rope system with another one. Dust particles in the air mix with the lubricating oil and clog up the air filter, therefore, preventing sufficient air from getting into the engine. Too much hot or cold engine does not work or even start to produce vacuum pressure inside engine. Turn the engine to get under the piston and blow the crankcase out. Check if the wires are damaged or broken and replace them if necessary. Can anyone make a suggestion. 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. read more Vince O. Stihl chainsaw low compression diagnoses and How To Dave's Small Engines 8.89K subscribers Subscribe 17K views 2 years ago This video shows a Stihl MS310 chainsaw I have apart from low. 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. I hook up a drill to the nut on the clutch and start hard starting saws that way . ", No it wouldn't go straight to crankcase because you would spray a light mist through air intake with hot engine and let it run for a while, (quoted from post at 00:57:42 08/18/17) My chainsaw has gotten very hard to pull the rope. A chainsaw is going to be exposed to oxidation over time, but you can at least limit the process by storing your chainsaw well. So, in our suggestion, one of the first things to check while feeling high compression is the starter spring. It is usual for the chainsaw chains to come off with continued use, but there is usually an underlying cause when its too repetitive. Check for broken teeth on the chain and replace them if necessary. 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. "description":"Discussion of Chainsaw has too much compression in the Tool Talk forum followed by comments. Check the chainsaws fuel if you have not used the tool for a while. 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. As the starter, spring plays a vital role in running starter assembly smoothly. 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?? Didnt somehow get straight oil in the cylinder did you? Check the chain oiler and ensure it is functional. The Stihl chainsaw uses a four-position lever ignition system called the master control lever. "headline":"Chainsaw has too much compression", I think you'll like it. Here is a link for two stroke engine air cycle. I have a MS250 that has come up on compression since new. 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. Pull the starter rope until you hear the first sign of it firing with a small burp. The Pulley compartment plays a massive role in retracting the ignition rope. I missed the "no carbon". 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! If the chainsaw is too little compression, it may start easily but will not run smoothly. An example of data being processed may be a unique identifier stored in a cookie. 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. Just wondering what your opinions are of the lowest compression you can run a Stihl MS250 at. It's also possible the piston or cylinder are scored or carboned up. Get it ported and it brings it to another level. The key on the flywheel is in place and not sheered. 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. lol. The extra effort to pull the saw is probably due to carbon build up on the piston crown and combustion chamber. Would have to remove spark plug and rinse cylinder with gas to be able to start. "datePublished": "2017-08-17", 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. Mar 22, 2017. That is the nature of a 250. Locate the tension adjustment screws to the side of the chainsaw guide bar. It very often kicks back and pulls the starter rope back in. "height": 57 #3. The saw runs and starts great. Trying to rotate the chain while a huge piece of wood is . I hope my epic guides will help you to choose,buy and maintain chainsaw. MS250 start compression relief stopped working. When the air that reaches the chain saw's engine is insufficient, it becomes prone to overheating. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. First, remove the cylinder and piston from the chainsaw. "@type": "WebPage", To fix this problem, turn off the chain saw and let it sit for about 30 minutes to allow the excess gas to evaporate. Do that to the starter side when you're looking at the starter assy. $20.00 shipping. Get you some Sea Foam at the local auto parts store. Hello D beatty, Here is a link for two stroke engine air cycle, Guido. 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.