It is best to put a new plug in after clearing. It will be apparent if it is, but usually a scored saw won't run good, if at all. Sometimes it kicks and the rope pulls right out of my hand. You will notice the compression less. STIHL MS 170 Chainsaw (NEW) full pack $295.00 $59.00 shipping Stihl MS170 Chainsaw Motor Fast Free Shipping $75.00 Free shipping or Best Offer Stihl 16 inch bar + Chain for MS170 - MS251 3/8 Pitch .043 Gauge 55 drivers $79.75 $25.45 shipping Only 3 left Stihl MS170 Chainsaw motor OEM Fast/Free Shipping $85.00 Free shipping or Best Offer If you buy another battery, make sure it has the same voltage and amperage as the old battery. It had a compression release, and it started and ran well. It is usual for the chainsaw chains to come off with continued use, but there is usually an underlying cause when its too repetitive. Animated Two Stoke Engine Air Cycle, My husky 266xp has been that away from newjust pull over slow for 2 or 3 times and then try cranking.. My husky 266xp has been that away from newjust pull over slow for 2 or 3 times and then try cranking.. I used to have a Homelite that would do that if I left gas in it. Chainsaw compression too much. Won't start. - YouTube "height": 57 The saw feels good in my hands and its got a surprising amount of power. Similarly, a 4-stroke engine needs 2 times more compression than a 2-stroke engine, around 180-210 PSI. Every chainsaw engine has a different capacity depending upon its motor power. Blup throttle to bring it down to idle. Friction is usually the cause of a rope failing to draw when it should. Stihl MS 250 C Compression Release - lilredbarn.net You may also want to go ahead and replace the plug. 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. When there is too much fuel, it will not ignite, and the engine wont start. How Many Amps Does a Garage Door Opener Use? If cleaning does not help release oil onto the bar, the pump may be damaged and require replacing. When the engine starts running, turn the choke off. 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 you notice the treads are worn, which prevents the device from pumping, replace it with a new one. The Pulley compartment plays a massive role in retracting the ignition rope. Without proper compression, the engine will not be able to suck and use the fuel for combustion. Even though it was purchased "brand new" I'm not so sure. Guido Hello EGBinOR, If A two cycle engine gets flooded BADLY, oil can separate from the gas mix, accumulate in the crankcase and creates an hydrostatc lock. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. Continue with Recommended Cookies. Turn the idle speed clockwise until the saw idles and chain turns, and then make a one-fourth counterclockwise turn. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright . Check the tension 2. of compression. (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 The following have been addressed. Don't put water into the 2 stroke. It's an older saw I bought at a garage sale. 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. Do that to the starter side when you're looking at the starter assy. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. There is no idle when I release the trigger. Take off the muffler or the carb to get access. Wash the dirty filter with a non-abrasive detergent and water. Chainsaw excessive compression - TractorByNet 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. 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. Get it ported and it brings it to another level. You never try to get it to run with the choke on. Gas with ethanol also burns hotter than gasoline which can cause the engine to overheat and burn the plug electrodes. Fine adjust everything and both saws start Normal now. I tried draining the crankcase with the saw upside . A cold engine will need the compression of 50-100 PSI whereas a hot engine will require compression above 150 PSI. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. I hook up a drill to the nut on the clutch and start hard starting saws that way . On a 2 stroke the water would go into the crank case first and pool up. When it comes to compression values, those between 90 and 110 psi are deemed to be acceptable. A large engine has a huge capacity in its motor. Remove the filter, engine control lever and Stihl carburetor. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. or Best . 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. Step 1: Prepare the chainsaw Remove the spark plug from the chainsaw. Sometimes an adapter is needed to make a tight fit. 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. Make sure you have a gauge with a schrader valve right at the tip of the spark plug adapter or you will get a low reading every time. "datePublished": "2017-08-17", Disconnect the spark plug from the engine and inspect if it is damaged, eroded, or dirty. }, Thanks! Stihl MS 250 Chain Saw: The pull start will barely move the - JustAnswer By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. I think that's what I'd do. This could be understood by reading the further explanation below. 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. 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. Use recommedend chain oil lubricant. A drastic and frankly silly thing to do though . Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. Remove the air filter cover and then slide off the rubber spark plug connector from the spark plug. It is possible however to flood a two stroke which can cause the plug to fowl. That is what was told to me by the area distributor technician Check for side play in the crankshaft. Advanced arborist chainsaw with a top handle and STIHL M-Tronic technology. How Much Compression Should a Chainsaw Have. Thanks. The saw runs and starts great. I bought 2 032 Stihl saws at auction that pulled very hard. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . 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. Are you sure the starter rope isn't a little too short? You can unclog the carburetor if the clog is minor. So be sure to keep your chainsaw properly maintained and avoid compression problems. Does the saw have a compression release? Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. MS250 start compression relief stopped working. If anything prevents the right amount of fuel into the combustion chamber, the chainsaw wont start. Insufficient fuel in the system may result in excessive compression. "url": "https://www.yesterdaystractors.com/graphics/smllogo.png", Doesnt pull at all or just hard to pull. A problem in the ignition system is likely to be the culprit when the chainsaw doesnt spark. If the compression is not produced in the engine at an appropriate level, it will not be able to convert fuel into energy. }, I went with a meteor piston/cylinder set. Hold the tip of the blade and adjust the tension of the chain correctly. Get you some Sea Foam at the local auto parts store. You are using an out of date browser. The carburetor is a significant part of the chainsaw. Check the electrode gap of the spark plug and ensure it is 0.02 inches. It runs good after I get it started. Then Google decarb . Rinse the filter and allow it to air dry before reinstalling it. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. On a 2 stroke the water would go into the crank case first and pool up. An engine is fit on the rear side of a chainsaw. anthonyg_ma Original Author 16 years ago Canguy, thnks for the tips! STIHL Chainsaws FAQs | STIHL Product FAQs | STIHL USA Ok folks, I'm stumped. I would never put water in it! 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. Stihl MS192T Chainsaw Fuel Oil Tank Engine Housing Assembly OEM. In a similar vein, if the wrong kind of oil is used, the compression may be increased. Check the chain oiler and ensure it is functional. Neighbor brought me his Stihl MS250 complaining that it tries to pull his arm from socket when 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. Remove the ignition coil, test it using a multimeter or an ignition coil tester, and confirm your chainsaw models resistance specification. link to Indoor Fly Traps: 5 Things You Didn't Know About Indoor Fly Traps. When there is no air for the spark to ignite, the chainsaw will start and then die after a short while. 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. Locate the tension adjustment screws to the side of the chainsaw guide bar. MS 260 - Robust chainsaw for forestry work - Stihl If it has to do with small engines, it's welcome here. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. Carbon buildup is yet another important factor in the increasing compression experienced by chain saws over time. The manual for this model, and the parts breakdown, show a compression release valve. Here is a link for two stroke engine air cycle. So, in our suggestion, one of the first things to check while feeling high compression is the starter spring. First thing I'd check is the pull start assy. It runs good after I get it started. I've done it to high hour Kohler engines many times. If I drop start it I can pull it through 1 compression stroke. Stihl MS290 Hard to pull recoil | Hearth.com Forums Home The carburetors work in a chainsaw engine allows the right amount of fuel and air mixture into the combustion chamber. 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. I have a MS250 that has come up on compression since new. The compression limit should also be doubled if the engine capacity is 100 CC. To clean it, drain the fuel, spray some carburetor cleaner and loosen the residue with a small brush. "@type": "WebPage", If you refuel your chainsaw and it still won,t start, below are some of the possible causes and solutions that will get the chainsaw functioning again. In this case fixing or repairing is required or worst replacing the engine all at once. Stihl ms 291 ? Here's How to Fix It Quickly However, these moving parts, to stay moving, require a substantial amount of compression. Stihl 026 Chainsaw hard to crank - retrofit compression relief valve Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. By checking & repairing/replacing these, you can fix the issue. 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. The excess gas can be cleared simply by removing the plug and operating the starter a few times. Soaking in water will do nothing but rust things up . Didnt somehow get straight oil in the cylinder did you? Would not be afraid to do it to a 4, 6, or V-8. Pour starting fluid into the carburetor and crank the engine several times. Does the saw have a compression release? STIHL Chainsaw Parts Engines for sale | eBay Help, can barley pull Stihl MS250, too much compression For a better experience, please enable JavaScript in your browser before proceeding. A hot engine also requires more compression to convert furl into energy as compared to the colder one. Take off the muffler or the carb to get access. I believe it was flooded, but I didn't think that little bit of fuel would make it that hard to pull but I guess so since it can't compress! If oil is in there it is what makes the engine feel like it is almost locked up. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. 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! 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. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. 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. $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 Obviously, the motor, which has a huge capacity, will require more compression. "@type":"DiscussionForumPosting", Now it has sat since the last use and I went to start it and it turned over maybe three times and the compression . 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. The ignition system is responsible for igniting the fuel and air mixture to produce energy that powers the chainsaw. You are misunderstanding WHY water is put into carboned up engines. A 50CC engine needs 150 PSI compression. How does it feel with the spark plug removed? 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. Fine adjust everything and both saws start Normal now. It can be from something as simple as starting the chainsaw wrongly to more severe issues like a damaged carburetor. Unscrew the clutch assembly on top of the oil pump. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Then Google decarb . It is like there is too much compression. It was metering lever. Check the chain tension and adjust it if it is too loose or tight. Make sure it is snug but can also move freely by hand. You can follow the steps on how to troubleshoot and revive it when it wont start. If you do not replace the starter spring on time, it will cause you to replace the whole starter assembly. It runs good after I get it started. The plug should be tight against your thumb. Check the spark plug and replace it if needed. Register today and take advantage of membership benefits. Cleaned air filters and both were very dirty. It works when cold-starting the engine, when the engine is idle and when the engine is open. A reddit for all operators of chainsaws to post experience with tools, pictures of their new saws and old workhorses and any maintenance tips. Most fuels nowadays are a blend of ethanol which attracts moisture and speeds up the rotting process. Generally the minimum is 110 lbs. 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?? Any ideas? Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. Every chainsaw needs to have some compression to ensure that it operates well. Choke cannot be used even when engine cold, or flooding occurs. When you are doing a cold start, push the choke lever to the warm start when the engine starts to run. Would have to remove spark plug and rinse cylinder with gas to be able to start. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. All it needs is a few inches missing and it will pull too hard like the compression is too high. The spark arrestor in a chainsaw traps exhaust products emitted from an internal combustion engine. Stihl oil has been used. i have a ms 250. Your chainsaws compressive strength is measured with the use of a screw-in gauge. Stihl MS 250 Chain Saw: The pull start will barely move the flywheel. I thought all the fuel was out but there was some in the line yet. I used to have a Homelite that would do that if I left gas in it. Pull the starter rope and look for a blue spark between the electrode of the spark plug. But it was stolen along with other tools around 1990. Get you some Sea Foam at the local auto parts store. Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. Poke the oil feed hole with a 16-gauge wire to unclog it until it slides through the hole smoothly. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. I would never put water in it! Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. 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. Your ignition rope must be intact properly with the pulley to work correctly. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. What Causes Too Much Compression on Poulan Chain Saws? The Stihl 066 chainsaw uses the same type of engine most gasoline-powered yard tools use, a two-cycle combustion engine. 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. 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.