lol. I've done it to high hour Kohler engines many times. } If it does maybe it is plugged. I bought it used around 1978. Once youve done that, reassemble the chainsaw, which should work properly again. A lot of variables might contribute to excessive compression while using a chainsaw. "@id": "https://www.yesterdaystractors.com/" When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. Check the choke of the chainsaws engine and make sure it is completely closed. #3. 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. Create an account to follow your favorite communities and start taking part in conversations. Wear rubber gloves and hold the rubber plug and spark plug about 1-2cm from the metal surface of the engine unit. 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. "height": 57 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. I just picked up a well used 025 that runs like a champ and has quite a bit of compression, I have not put a gauge on it but it will pull the starting handle out of my hands if I'm not paying attention. I got it going. Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. Choke cannot be used even when engine cold, or flooding occurs. It runs good after I get it started. Stihl MS192T Chainsaw Fuel Oil Tank Engine Housing Assembly OEM. I think that's what happened, although I didn't think such a small amount could do it. However, this will vary by model and compression readings alone are not enough to determine the condition of the engine. Your ignition rope must be intact properly with the pulley to work correctly. I used to have a Homelite that would do that if I left gas in it. Change in temperatures and dirt will cause clogging anywhere the oil passes, and this can prevent the oil from spread all across the bar. It may not display this or other websites correctly. A chainsaw with no spark will shut down suddenly or not start at all. "@type": "ImageObject", There are sprays (power tune) for removing carbon, but I doubt if that's your problem. It's an older saw I bought at a garage sale. 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. The power of the motor of an engine is measured in its capacity. A chainsaw is going to be exposed to oxidation over time, but you can at least limit the process by storing your chainsaw well. It works when cold-starting the engine, when the engine is idle and when the engine is open. Follow the steps below on how to fix a flooded chainsaw engine. water will not dissolve carbon; it is far too hard to be effected. A large engine has a huge capacity in its motor. Create an account to follow your favorite communities and start taking part in conversations. I;ve read somewhere to put water? 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. Unscrew the clutch assembly on top of the oil pump. Here is a link for two stroke engine air cycle. Loosen the nuts and bolts clockwise and then pull out the oil pump gently. Pull the starter rope and look for a blue spark between the electrode of the spark plug. 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. "name": "Yesterday's Tractor Co.", Most of the time, the chainsaw cord became hard to pull because of the Starter Housing. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. Generally covering everything under 25 HP. $49.99. 4 Possible Problems & Solutions Problem 1: Damaged starter housing Solution: 1. Could your gauge be off a little? Because of an absence of lubrication, the chain saw system becomes brittle, resulting in excessive compression of the chain saw mechanism. Carboned rings will decrease not increase compression. Register today and take advantage of membership benefits. 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. $99.95. I've done it to high hour Kohler engines many times. I would suspect the timing is too early. Spark plugs that are not functioning properly are another probable cause of excessive compression. Sounds flooded, or maybe wrong sparkplug? . It is thus highly recommended that you drain the fuel from your chainsaw if it still has any old gasoline left in it. Also check the air filters and make sure they are clean. If anything prevents the right amount of fuel into the combustion chamber, the chainsaw wont start. Even though it was purchased "brand new" I'm not so sure. Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. What is the minimum compression for my STIHL chainsaw? Try it, it may just do the trick! The ideal pressure range of the Stihl chainsaw is between 90 and 110 psi. Insufficient fuel in the system may result in excessive compression. If the chainsaw is too much compression, it may be difficult to start. I get it going now and its easier but its still a bear. Use a can of carb cleaner sprayed into the breather/filter assembly. Activate the chain brake and then place the chainsaw on a flat, leveled surface. The flywheel is loose? Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. You are misunderstanding WHY water is put into carboned up engines. If the rails are shallow, you need to replace them. Please use the navigational links to explore our website. I would never put water in it! Quoting Removed, click Modern View to see Don't put water in the saw-ever. 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 purpose of a choke in a chainsaw is to make cold starting more effortless, but if you do not use it properly. 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. Sounds like it was broken in "right", show the guy how to start it and tell him to be happy. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. I've seen a 20psi drop with the wrong type of gauge to be pretty common. People sometimes try to cut down a tree that is too big for their chainsaw. If so, show him how to start it on the ground with his foot in it or with the rear handle between his thighs. I hook up a drill to the nut on the clutch and start hard starting saws that way . Consequently, operating this chainsaw becomes a really difficult chore to do. Poke the oil feed hole with a 16-gauge wire to unclog it until it slides through the hole smoothly. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. Unscrew the spark plug wrench using a spark plug from the engine. I'm hearing thats just the nature of the beast. Let saw run until its warmed up, and go cut wood. 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. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. We got rid of both of those useless things . When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. Every chainsaw engine has a different capacity depending upon its motor power. Sometimes the spring stops working correctly due to overuse and becomes brittle. ", Mar 22, 2017. The piston and rings are very shiney. Therefore, most people will wonder why the chainsaw has too much compression. A compression gauge is used to measure the compression of a chainsaw which works similarly to the tire gauge. Obviously, the motor, which has a huge capacity, will require more compression. Use a screw wrench to loosen the nuts on the guide bar side panel to give you room to adjust the chain. I think that's what I'd do. Dont substitute it with. Check for side play in the crankshaft. 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 You need to pull the exhaust to check that. To inspect the guide bar, disassemble the chain cover, chain and bar. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. I;ve read somewhere to put water? Make sure there is oil in the engine. This is because your oil is not rated to get to work at a low temperature. Flooding usually happens due to an underlying issue: a bad spark plug, bad gas, or a faulty carburetor. On a 2 stroke the water would go into the crank case first and pool up. Additionally, most spark plugs come pre-gapped. You never try to get it to run with the choke on. Ron Cook. Here is how to troubleshoot a malfunctioning spark plug. We're all about fixing small engines, from carburetor rebuilds, to crankshaft machining. Turn the brake off. 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. In this case fixing or repairing is required or worst replacing the engine all at once. Sometimes an adapter is needed to make a tight fit. (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 Im Nelson, a DIY enthusiast with a bottomless can-do attitude. 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. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. }. If you still have questions regarding high chainsaw compression, you can discuss them in the comments. To fix this problem, turn off the chain saw and let it sit for about 30 minutes to allow the excess gas to evaporate. I hook up a drill to the nut on the clutch and start hard starting saws that way . When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. Carboned rings will decrease not increase compression. Fuel filters trap dirt and contaminants from the fuel to prevent them from damaging the engine. Make sure you have a replacement spark plug on hand in case the problem recurs in the future. 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. 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. Don't know what to do at this point. Move the selector lever up one position immediately or the saw will flood on the very next pull. By checking & repairing/replacing these, you can fix the issue. He checked.it clearly says that in the OP. 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. This may sometimes jam your chainsaws rings, causing it to become inoperable. MS250 start compression relief stopped working. Try taking it out, Then holding the trigger while you pull fast. 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. Normally it's not a problem but if it was already difficult to pull it could be. How does it feel with the spark plug removed? "publisher": { Starter fluids spray can help in those conditions Before pulling shoulder. I usual only choke my MS250 for one pull and no longer have the flooding issue. The engine creates a vacuum pressure inside it. Thus far, you have learned how to diagnose most problems with the Stihl chainsaw and how to fix the issues. pulls with little resistance, similar to my farm boss. A reddit for all operators of chainsaws to post experience with tools, pictures of their new saws and old workhorses and any maintenance tips. JavaScript is disabled. Your chainsaws compressive strength is measured with the use of a screw-in gauge. Cleaned air filters and both were very dirty. Can also be used with hedge trimmer attachment HS 246. Check for any cracks and damages and replace if necessary. How To Fix Chainsaw Battery Charger Blinking Red? It is possible however to flood a two stroke which can cause the plug to fowl. 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 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. Check the saws exterior for loose bolts, nuts, and screws and tighten them with an adjustable wrench or screwdriver. I wouldn't go messing with the carb expecting to cure the issue unless you have obvious signs of flooding when trying to start. The starter assembly often fails to rotate due to a weak connection between the pulley and the ignition rope. So, in our suggestion, one of the first things to check while feeling high compression is the starter spring. If the coil is faulty, there will be no spark to start the engine and run the chainsaw. A smaller gap will cause a weak spark and poor ignition of the engine, while a wider gap will not bring out any spark. check the cylinder & piston for carbon build-up, how much compression Does the chainsaw Engine need, How To Reset Echo 58-Volt Battery Charger. If any of these components are worn or broken, the chain saw wont start even with fuel. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Remove the air filter cover and then slide off the rubber spark plug connector from the spark plug. I changed to synthitic. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. Sometimes, the ignition rope is frayed or stuck inside the starter housing. There is no carbon build up and all looks like new. Compression gauges are not always accurate and different engines will provide different results. 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. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. "logo": { If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. "name": "Egbinor" It is best to put a new plug in after clearing. I think that's what I'd do. When it comes to compression values, those between 90 and 110 psi are deemed to be acceptable. Are you sure the starter rope isn't a little too short? The second thing, Read More Stihl Chainsaw Charger Not WorkingContinue, Your email address will not be published. Get you some Sea Foam at the local auto parts store. Versions MS 260, Bar length 37cm, RSC Pull the recoil off and check for binding Pull rope or starter pawls misaligned. OEM GOOD USED STIHL 048AV CHAINSAW SHORT BLOCK ENGINE 120 PSI COMPRESSION. Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. My question is what is causing the trigger to not slow down. You're familiar with how to start a stihl yes? I tried draining the crankcase with the saw upside . The exhaust side of the piston is a warm gold. For 503552201 Cylinder Compression Plug Package Include: 3 x Cylinder Plug Cylinder Compression Plug Insert the air filter and the spark plug, reconnect the spark plug wire, and close the opening. Does the saw have a compression release? It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. I bought an old beater 621 Jonsered once that had very high compression, got it running well and sold it, made some money on it! I have plenty of engines with REALLY low compression that I'll be glad to swap him. Free shipping. Too much carbon will do that, check the piston top and combustion chamber. 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. You will notice the compression less. After that, using a ratchet, remove the spark plug from the engine. I'm also going to double check it has the correct resistor type spark plug. I have a MS250 that has come up on compression since new. 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. Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. 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. My husky 266xp has been that away from newjust pull over slow for 2 or 3 times and then try cranking.. You are misunderstanding WHY water is put into carboned up engines. 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. Now, how much compression the engine of a chainsaw needs depends upon its motor capacity and temperature. You never try to get it to run with the choke on. If you recently refueled your Stihl chainsaw, stale gas can be a reason why it wont start. A clear sign that you may have a chainsaw engine is when you smell gas while starting it. }, 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. This is bad practice, and can damage your chainsaw. After initial pull on rope (which feels like vapor lock on cylinder), saw will start on second or third pull. Sometimes it kicks and the rope pulls right out of my hand. How big a fella are ya? 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. NelsGarage.com All Rights Reserved 2021 Theme: Prefer by, Stihl Chainsaw Troubleshooting & How-to Guide. But it was stolen along with other tools around 1990. The owner is complaining of hard to pull start. It is harmful to your machine to use old fuel. Get you some Sea Foam at the local auto parts store. Doesnt pull at all or just hard to pull. The correct tension of the chainsaw chain should be slightly loose on the guide bar but tight enough that you cant pull the drive links out of the bar to fix the chain tension issues; follow the steps below. 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. 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.
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