Use of this Web site constitutes acceptance of our. 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! Another big issue that causes too much high compression is the lack of oil in the starter system. #3. My /Sthil 034 is very difficult to start. 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. 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. Over time, soot from the engine clogs up the spark arrestor causing the chainsaw to stall. I hook up a drill to the nut on the clutch and start hard starting saws that way . 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?? Would not be afraid to do it to a 4, 6, or V-8. Reassemble the chainsaw, refill the fuel tank, crank the engine and check for oil along the bar. 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. The Stihl chainsaw is a two-stroke gas-powered tool that uses a substantial amount of compression to pull fuel from the tank, mix it with air and ignite it to produce energy that runs the chainsaw. "dateModified": "2017-08-17", My question is what is causing the trigger to not slow down. A chainsaw with no spark will shut down suddenly or not start at all. Remove the filter, engine control lever and Stihl carburetor. }, Unscrew the spark plug using a ratchet and screw the compression gauge in its place. If any of these components are worn or broken, the chain saw wont start even with fuel. 3 9 9 comments Best Add a Comment Revolutionary-Act469 2 yr. ago Doesn't pull at all or just hard to pull. For the chainsaw to function appropriately, you must maintain the proper amount of tension on the chain. 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. You are using an out of date browser. The chainsaw motor engine capacity can range from 30CC and 50CC to 150 CC. Remove the entire carburetor and clean it. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. 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. Therefore, it does not need any compression rate to start. If I drop start it I can pull it through 1 compression stroke. Turn the engine to get under the piston and blow the crankcase out. Choke cannot be used even when engine cold, or flooding occurs. Make sure it's greased and the bushings are good. I've seen it happen a couple times. Take off the muffler or the carb to get access. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. A large engine has a huge capacity in its motor. Activate the chain brake and then place the chainsaw on a flat, leveled surface. 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. Try it, it may just do the trick! We and our partners use cookies to Store and/or access information on a device. If the rails are shallow, you need to replace them. If oil is in there it is what makes the engine feel like it is almost locked up. Most fuels nowadays are a blend of ethanol which attracts moisture and speeds up the rotting process. So, If you feel too much compression while pulling a chainsaw, the possible reasons might be as below. You never try to get it to run with the choke on. I would never put water in it! Make sure the gap is according to the specifications of your chainsaws engine. 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. 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. He checked.it clearly says that in the OP. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. The extra effort to pull the saw is probably due to carbon build up on the piston crown and combustion chamber. what and or where is the metering lever.? Help, can't pull start Stihl MS250 chainsaw, too much compression. 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! Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. The first step is to remove the cover that covers the spark plug on your chainsaw. Remove the spark plugs and the e-clips attached to the sprocket on the engine shaft. Poke the oil feed hole with a 16-gauge wire to unclog it until it slides through the hole smoothly. Has anyone ever seen a stock MS250 or any stock stihl with 190psi of compression? Admitted Woodaholic. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . If that doesnt work, try gently tapping on the side of the bulb with a screwdriver or other tool. "name": "Yesterday's Tractor Co.", 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. Sometimes the spring stops working correctly due to overuse and becomes brittle. We have explained the most effective way to unflood a chainsaw engine below. You can clean and mildly clogged carburetor but if it is too severe, replace it with one compatible with your chainsaw model. lol. What is the minimum compression for my STIHL chainsaw? You never try to get it to run with the choke on. Try blowing the crankcase out with air. water will not dissolve carbon; it is far too hard to be effected. I have had the cylinder off. It was easier to pull after I cleaned it up, but still tough. NelsGarage.com All Rights Reserved 2021 Theme: Prefer by, Stihl Chainsaw Troubleshooting & How-to Guide. A drastic and frankly silly thing to do though . Make sure the keyway is lined up correctly and tighten the nut down good and tight. 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. Any ideas? To clean it, drain the fuel, spray some carburetor cleaner and loosen the residue with a small brush. Any help out thereEGBinOR Get you some Sea Foam at the local auto parts store. "width": 200, Hold the tip of the blade and adjust the tension of the chain correctly. The lack of oil dries the chainsaw assembly, which causes high compression and becomes very difficult for you to handle the chainsaw. Reddit and its partners use cookies and similar technologies to provide you with a better experience. You need to pull the exhaust to check that. It had a compression release, and it started and ran well. You are using an out of date browser. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. Wash the dirty filter with a non-abrasive detergent and water. It runs good after I get it started. Once youve done that, reassemble the chainsaw, which should work properly again. $20.00 shipping. Each chainsaw has a different level of compression. $49.99. 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. If it has to do with small engines, it's welcome here. "@id":"https://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=toolt&th=435118", Getting these problems resolved is a rather straightforward process. If the compression is not produced in the engine at an appropriate level, it will not be able to convert fuel into energy. Compression gauges are not always accurate and different engines will provide different results. Remove the spark plug with a spark plug wrench and clean it with a brush to remove carbon scoring and dirt. Suitable Replacement Stihl MS 250 C Compression Release Parts Pour starting fluid into the carburetor and crank the engine several times. Carboned rings will decrease not increase compression. This article will help you fix the most commonly reported problems of a Stihl chainsaw. Most of the time, the chainsaw cord became hard to pull because of the Starter Housing. I used to have a Homelite that would do that if I left gas in it. That is a high compression saw, pull the rope slowly until you feel resistance then give it a short quick pull. 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. "publisher": { If it is too damaged, you should replace it. The engine creates a vacuum pressure inside it. I would suggest clearing the cylinder by pulling the rope with the plug out. Check the choke of the chainsaws engine and make sure it is completely closed. If you recently refueled your Stihl chainsaw, stale gas can be a reason why it wont start. Every chainsaw requires a specific amount of compression if this compression is more or less than the required amount, the engine will not be able to produce energy from the fuel source, and it will be exhausted faster. Repair or replace the damaged part 2. I'll even do the labor for free. The starter assembly often fails to rotate due to a weak connection between the pulley and the ignition rope. For a better experience, please enable JavaScript in your browser before proceeding. A reddit for all operators of chainsaws to post experience with tools, pictures of their new saws and old workhorses and any maintenance tips. Pull the starter rope until you hear the first sign of it firing with a small burp. It does not take much to increase the compression. Don't know what to do at this point. It may not display this or other websites correctly. Every chainsaw needs to have some compression to ensure that it operates 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. Replace the spark plug with a new identical. 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. John Deere and its logos are the registered trademarks of the John Deere Corporation. I used to have a Homelite that would do that if I left gas in it. I hook up a drill to the nut on the clutch and start hard starting saws that way . I have a MS250 that has come up on compression since new. 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. Recognised as a leading saw in the forestry industry, it is available in guide bar lengths 13"/32cm to 18"/45cm. It will be apparent if it is, but usually a scored saw won't run good, if at all. It's also possible the piston or cylinder are scored or carboned up. The ideal pressure range of the Stihl chainsaw is between 90 and 110 psi. Pull the recoil off and check for binding Pull rope or starter pawls misaligned. 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. Turn the brake off. Generally the minimum is 110 lbs. Stihl 024 - Sherlock Holmes issue - help needed here. No carbon on top or on roof of cylinder. "@type": "Organization", The power of the motor of an engine is measured in its capacity. 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. 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. "@id": "https://www.yesterdaystractors.com/" Replaced the chain and did some serious cutting and was so pleased. 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. Use a can of carb cleaner sprayed into the breather/filter assembly. Too much carbon will do that, check the piston top and combustion chamber. Spark plugs that are not functioning properly are another probable cause of excessive compression. Pull trigger and set full choke. or Best Offer. Hope this helps. I have plenty of engines with REALLY low compression that I'll be glad to swap him. Start new topic; Recommended Posts. You can follow the steps on how to troubleshoot and revive it when it wont start. I changed to synthitic. If you regularly use the chainsaw, then there might be the possibility that your starter spring breaks off. I think you'll like it. A compression gauge is used to measure the compression of a chainsaw which works similarly to the tire gauge. Press question mark to learn the rest of the keyboard shortcuts. Trying to rotate the chain while a huge piece of wood is . What worked with my MS440 kicking problem should also work with that one. Over time or when using the wrong fuel, the fuel filter becomes too clogged and restricts fuel flow, killing the engine shortly after starting. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. The chain clutch might be, Read More Cordless Chainsaw Wont StartContinue, The most common reason is simply the wrong battery. I tried draining the crankcase with the saw upside . When starting the motor when its col, you should engage the choke position to increase fuel intake and reduce air to allow the engine to start. By getting your pool ready for the winter, you can make sure it will be ready to use in the spring. Low pressure, 20 to 30 pounds is all you need. It is best to put a new plug in after clearing.
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