An engine is fit on the rear side of a chainsaw. Don't know what to do at this point. 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! NelsGarage will share the knowledge Ive gathered about different tools and give you tips to accomplish your DIY projects faster. Would not be afraid to do it to a 4, 6, or V-8. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. Unscrew the spark plug using a ratchet and screw the compression gauge in its place. Soaking in water will do nothing but rust things up . The compression limit should also be doubled if the engine capacity is 100 CC. It would give you rusted bearings. Then Google "decarb". Now it has sat since the last use and I went to start it and it turned over maybe three times and the compression . The carburetor sucks fuel from the tank, mixes it with the right amount of air, and pushes the mixture into the combustion chamber. The starter assembly often fails to rotate due to a weak connection between the pulley and the ignition rope. However, these moving parts, to stay moving, require a substantial amount of compression. The extra effort to pull the saw is probably due to carbon build up on the piston crown and combustion chamber. Modern View Forum powered by phpBB 2001, 2005 phpBB Group. Make sure it's greased and the bushings are good. 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. 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. Register today and take advantage of membership benefits. When the oil pimp or oiler is faulty, it will reduce the chainsaws performance and power. Don't put water into the 2 stroke. So, If you feel too much compression while pulling a chainsaw, the possible reasons might be as below. 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. Ron Cook. We're all about fixing small engines, from carburetor rebuilds, to crankshaft machining. Don't put water into the 2 stroke. You are misunderstanding WHY water is put into carboned up engines. We are compensated for referring traffic and business to Amazon and other companies linked to on this site. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. If the rails are shallow, you need to replace them. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. Temperature Of The Engine A heavy-duty engine gets hot faster and works better than a cold engine. As a result, normal compression settings will change based on the kind of chainsaw machine you are using. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. Fuel filters trap dirt and contaminants from the fuel to prevent them from damaging the engine. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. It may not display this or other websites correctly. If A two cycle engine gets flooded BADLY, oil can separate from the gas mix, accumulate in the crankcase and creates an hydrostatc lock. Not sure it would accomplish anything on a 2-stroke chain saw engine. Other than damaged parts, using the choke position to start a warm saw often causes a flooded engine. Get it ported and it brings it to another level. Pull the recoil off and check for binding Pull rope or starter pawls misaligned. 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.. In other words, the problem is in the trigger itself, not a. carb adjustment screw. Check the chain oiler and ensure it is functional. The first step is to remove the cover that covers the spark plug on your chainsaw. I've seen a 20psi drop with the wrong type of gauge to be pretty common. 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. Reassemble the chainsaw, refill the fuel tank, crank the engine and check for oil along the bar. How Much Compression Should a Chainsaw Have. It may not display this or other websites correctly. The ideal pressure range of the Stihl chainsaw is between 90 and 110 psi. A reddit for all operators of chainsaws to post experience with tools, pictures of their new saws and old workhorses and any maintenance tips. Remove the sprocket and the washer. What usually happens is that the guide bar gets stuck in the tree and they keep running the engine while trying to force the bar out of the tree somehow. after that I'd be looking at crank bearings. On a 2 stroke the water would go into the crank case first and pool up. Even with new spark plugs in, incorrectly removing and installing the spark plugs can prevent the engine from starting. Thanks. I wouldn't go messing with the carb expecting to cure the issue unless you have obvious signs of flooding when trying to start. 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. Make sure you have a replacement spark plug on hand in case the problem recurs in the future. For the chainsaw to function appropriately, you must maintain the proper amount of tension on the chain. For 503552201 Cylinder Compression Plug Package Include: 3 x Cylinder Plug Cylinder Compression Plug Do that to the starter side when you're looking at the starter assy. Remove the ignition coil, test it using a multimeter or an ignition coil tester, and confirm your chainsaw models resistance specification. Does the saw have a compression release? If you find the brake drum moving, you must replace the needle bearing. We have explained the most effective way to unflood a chainsaw engine below. My name is Chris Ross. The following have been addressed. I've done it to high hour Kohler engines many times. Guido Quoting Removed, click Modern View to see What?? Also, remove the muffler and check for carbon buildup. "@id":"https://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=toolt&th=435118", If not I'm honestly kinda stumped. External air goes into the engine through the air filter to cool down the chainsaw engine and also mix with the fuel to ignite and run the saw. Ok folks, I'm stumped. Every time you fuel the chainsaw, you should make sure to drain the old fuel first to avoid contaminating the new fuel. Replace the fuel filters instead of cleaning them as they are pretty affordable and easy to install too. 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. If you buy another battery, make sure it has the same voltage and amperage as the old battery. Greenworks Commercial GS181 82V 18-inch Chainsaw: 50cc gas equivalent power with a stock 18-inch bar and chain ( starting at $349) 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. Replace with a new starter house Problem 2: Damaged pulley system Solution: 1. Runs well, except it. So be sure to keep your chainsaw properly maintained and avoid compression problems. 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. Has someone invented a new kind of two stroke motor? Does the saw have a compression release? Get you some Sea Foam at the local auto parts store. We got rid of both of those useless things . $99.95. Press J to jump to the feed. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. Use an adjustable wrench to loosen the two nuts on both sides of the chainsaw. Cleaned air filters and both were very dirty. JavaScript is disabled. Oct 24, 2011 / Chainsaw excessive compression #1 . Try it, it may just do the trick! Final step: removing the old spark plug and installing the new one. "url": "https://www.yesterdaystractors.com/graphics/smllogo.png", I would never put water in it! The engine creates a vacuum pressure inside it. I think that's what I'd do. 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. That is a high compression saw, pull the rope slowly until you feel resistance then give it a short quick pull. You need to pull the exhaust to check that. i have a ms 250. I'm also going to double check it has the correct resistor type spark plug. Back to top derwen1959 Long Time User Check the electrode gap of the spark plug and ensure it is 0.02 inches. The compression limit should also be doubled if the engine capacity is 100 CC. I would suggest clearing the cylinder by pulling the rope with the plug out. Soaking in water will do nothing but rust things up . Check for any cracks and damages and replace if necessary. I think that's what I'd do. My one and only MS250 was a kicker to start it but that was the only problem. This is because each machine is made differently and has various needs. Flooding usually happens due to an underlying issue: a bad spark plug, bad gas, or a faulty carburetor. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. Admitted Woodaholic. I have a MS250 that has come up on compression since new. Youre familiar with how to start a stihl yes? It uncoils, tightens the spring, engages the clutch to start the engine. How Many Amps Does a Garage Door Opener Use? anthonyg_ma Original Author 16 years ago Canguy, thnks for the tips! Move the selector lever up one position immediately or the saw will flood on the very next pull. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. Sometimes an adapter is needed to make a tight fit. Starting fluid will make the fuel more combustible and makes the process of clearing out the combustion chamber much quicker. Pull trigger and set full choke. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. water will not dissolve carbon; it is far too hard to be effected. Take off the muffler or the carb to get access. Trying to rotate the chain while a huge piece of wood is . { Not sure it would accomplish anything on a 2-stroke chain saw engine. I'll even do the labor for free. I bought 2 032 Stihl saws at auction that pulled very hard. Some of the contributing reasons include a full tank of oil, carbon buildup on the exhaust system, and malfunctioning spark plugs. If the chainsaw is too much compression, it may be difficult to start. "headline":"Chainsaw has too much compression", 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. Check for clogging around the bar oil. Turn off the choke by pressing the control lever to activate the fast idle. Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. check the cylinder & piston for carbon build-up, how much compression Does the chainsaw Engine need, How To Reset Echo 58-Volt Battery Charger. The choke should be closed during a cold start to limit the air and increase the fuel in the engine to keep it running while it warms up. My /Sthil 034 is very difficult to start. Use a screw wrench to loosen the nuts on the guide bar side panel to give you room to adjust the chain. 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. I would never put water in it! However, the compression also has a limitation because a very high or very low compression will cause problems and prevent your chainsaw from operating efficiently. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. The chain clutch might be, Read More Cordless Chainsaw Wont StartContinue, The most common reason is simply the wrong battery. It's possible the timing is off a little but without knowing the make and model of the saw that's just a long shot. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. Press J to jump to the feed. So, replacing the ignition rope is a better option to keep everything working smoothly without any damage. That is what was told to me by the area distributor technician. If the air filter is too clogged, you should replace it. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. If the chainsaw is too little compression, it may start easily but will not run smoothly. Are you sure the starter rope isn't a little too short? Why is the Garage Door Opener Light Not Working? 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! "@type":"DiscussionForumPosting", Quoting Removed, click Modern View to see Don't put water in the saw-ever. 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. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. If you suspect a compression issue, seek professional help as compression repairs can be complicated. Didnt somehow get straight oil in the cylinder did you? Make sure the crank taper is clean and the flywheel taper also. Additionally, most spark plugs come pre-gapped. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. "author": { Remove ignition coil and muffler. Locate the tension adjustment screws to the side of the chainsaw guide bar. 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. Even though it was purchased "brand new" I'm not so sure. It runs good after I get it started. Any help out thereEGBinOR Get you some Sea Foam at the local auto parts store. Recognised as a leading saw in the forestry industry, it is available in guide bar lengths 13"/32cm to 18"/45cm. An excessive amount of compression in your chainsaws starting rope could also be indicated by the beginning rope failing to draw. Then, use a wire brush to remove all the carbon build-up from the cylinder and piston. in the cylinder overnight because the rings are cerboned up? . I can probably find one with at most 65 PSI. Over time or when using the wrong fuel, the fuel filter becomes too clogged and restricts fuel flow, killing the engine shortly after starting. Repair or replace the damaged part 2. Unscrew the clutch assembly on top of the oil pump. Try blowing the crankcase out with air. read more Vince O. Ensure the chain fits snugly inside of the bar and the teeth that keep it in place are not worn down too low. A two-stroke gas-powered chainsaw uses relatively few moving parts. The choke position is the fourth setting on the master control lever. You can check the compression by pulling the spark plug out and holding it in your hand. A clogged carburetor wont allow fuel into the engine, preventing it from starting. Below are the reasons the chain keeps coming loose and how to fix it. Doesnt pull at all or just hard to pull. In addition, you should check the muffler and piston while youre at this point. However, you still have to confirm the size of the gap before installing. 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. Carboned rings will decrease not increase compression. When the motor warms up after about a minute, turn on the choke position. But it was stolen along with other tools around 1990. 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. Im Nelson, a DIY enthusiast with a bottomless can-do attitude. Locate the spark plug from the top of the engine underneath the chain brake handle. It's also possible the piston or cylinder are scored or carboned up. "@context":"https://schema.org", If it does maybe it is plugged. Every chainsaw needs to have some compression to ensure that it operates well. It runs good after I get it started. A smaller gap will cause a weak spark and poor ignition of the engine, while a wider gap will not bring out any spark. A drastic and frankly silly thing to do though . 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. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. I would suspect the timing is too early. If the spark plug is too corroded or the electrode is faulty, it cannot create an electrical current to start the system. 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. It's possible the timing is off a little but without knowing the make and model of the saw that's just a long shot. If you do not replace the starter spring on time, it will cause you to replace the whole starter assembly. The flywheel is loose? If it is the right sparkplug and not flooded, I would maybe buy a different saw with easy start. It will be apparent if it is, but usually a scored saw won't run good, if at all. Carboned rings will decrease not increase compression. Low pressure, 20 to 30 pounds is all you need. The key on the flywheel is in place and not sheered. Always change the spark plug after 100 operating hours of the chainsaw to avoid engine problems. Unscrew the spark plug wrench using a spark plug from the engine. When the engine starts running, turn the choke off. 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?? John Deere and its logos are the registered trademarks of the John Deere Corporation. Thanks! First, remove the spark plug from the chainsaw. 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. everything is harder in a tree, not a conclusive test. 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!!! If you regularly use the chainsaw, then there might be the possibility that your starter spring breaks off. If anything prevents the right amount of fuel into the combustion chamber, the chainsaw wont start. water will not dissolve carbon; it is far too hard to be effected. He checked.it clearly says that in the OP. 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. A chainsaw is going to be exposed to oxidation over time, but you can at least limit the process by storing your chainsaw well. This can lead to serious injuries, including cuts and amputations. Similarly, a 4-stroke engine needs 2 times more compression than a 2-stroke engine, around 180-210 PSI. 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! 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. Make sure the gap is according to the specifications of your chainsaws engine. This could be understood by reading the further explanation below. When it comes to compression values, those between 90 and 110 psi are deemed to be acceptable. Stihl 024 - Sherlock Holmes issue - help needed here. of compression. We will explain the causes of high compression and how you can quickly fix it to make it run smoothly. Try blowing the crankcase out with air. Confirm the spark plug gap, check and adjust with a feeler gauge or gaping tool. What worked with my MS440 kicking problem should also work with that one. $20.00 shipping. If that is true, I'd suspect that the timing is off and why it's ripping the cord from your hand. The piston and rings are very shiney. If so, show him how to start it on the ground with his foot in it or with the rear handle between his thighs. Most times, when the Stihl chainsaw stops working, it is never a complete breakdown. If it is hard to pull, then check how the spring is performing. Any chance is it hydro locking because of gas? 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. Pull the starter rope until you hear the first sign of it firing with a small burp. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. After all these operations are carried out, it is necessary to once again clean the saw from dirt, then turn it upside down and unscrew the four screws securing the engine to the chainsaw body. If you see any unusual movement of spring, then take it in to replace it. You can prevent the new starter rope from fraying by burning the two ends of the rope. There is no idle when I release the trigger. 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?? link to Indoor Fly Traps: 5 Things You Didn't Know About Indoor Fly Traps. 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. It is typical for the Stihl chainsaw to develop some issues, and when this happens, some basic troubleshooting will help identify the source of the issue and solution to help it run smoothly. Insert the air filter and the spark plug, reconnect the spark plug wire, and close the opening.