Pour starting fluid into the carburetor and crank the engine several times. A chainsaw engine generates this compression through the explosion of the fuel in the combustion chamber and the movement of the crankcase. You are misunderstanding WHY water is put into carboned up engines. Too much carbon will do that, check the piston top and combustion chamber. Register today and take advantage of membership benefits. A compression gauge is used to measure the compression of a chainsaw which works similarly to the tire gauge. The switch might be damaged or the motor is burned out. If so, show him how to start it on the ground with his foot in it or with the rear handle between his thighs. The chainsaw motor engine capacity can range from 30CC and 50CC to 150 CC. The other reason might be the use of the wrong type of oil for the climate. In a similar vein, if the wrong kind of oil is used, the compression may be increased. 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. no, afraid I don't have equipment to test. You never try to get it to run with the choke on. Make sure the crank taper is clean and the flywheel taper also. i have a ms 250. Now, how much compression the engine of a chainsaw needs depends upon its motor capacity and temperature. 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. A drastic and frankly silly thing to do though . 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. I think that's what I'd do. Yes I tried that last time and it did help some. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. If it does maybe it is plugged. The Stihl 066 chainsaw uses the same type of engine most gasoline-powered yard tools use, a two-cycle combustion engine. A problem in the ignition system is likely to be the culprit when the chainsaw doesnt spark. Don't know what to do at this point. If the compression is too high or too low, the engine wont start. Replace the spark plug with a new identical. The saw feels good in my hands and its got a surprising amount of power. Follow the steps below on how to fix a flooded chainsaw engine. Similarly, a 4-stroke engine needs 2 times more compression than a 2-stroke engine, around 180-210 PSI. Make sure the keyway is lined up correctly and tighten the nut down good and tight. Help, can't pull start Stihl MS250 chainsaw, too much compression. Make sure there is oil in the engine. Stihl chainsaw compression test Joe_Power Jun 2, 2015 Not open for further replies. I've seen a 20psi drop with the wrong type of gauge to be pretty common. Try taking it out, Then holding the trigger while you pull fast. I have plenty of engines with REALLY low compression that I'll be glad to swap him. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. OEM GOOD USED STIHL 048AV CHAINSAW SHORT BLOCK ENGINE 120 PSI COMPRESSION. Other than that, you should also use the correct spark plugs for your chainsaw. Why is the Garage Door Opener Light Not Working? If you do not replace the starter spring on time, it will cause you to replace the whole starter assembly. Also check the air filters and make sure they are clean. Any chance is it hydro locking because of gas? 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. 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. 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. The spark plug is located in the engine and ignites the fuel and air mixture, driving the piston and running the engine. Reddit and its partners use cookies and similar technologies to provide you with a better experience. "@type": "Person", Turn the idle speed clockwise until the saw idles and chain turns, and then make a one-fourth counterclockwise turn. Would not be afraid to do it to a 4, 6, or V-8. The carburetors work in a chainsaw engine allows the right amount of fuel and air mixture into the combustion chamber. Trying to rotate the chain while a huge piece of wood is . We are compensated for referring traffic and business to Amazon and other companies linked to on this site. 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. Remove ignition coil and muffler. Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. Your chainsaws compressive strength is measured with the use of a screw-in gauge. Then Google decarb . And some will have more. Try blowing the crankcase out with air. You can prevent the new starter rope from fraying by burning the two ends of the rope. You are using an out of date browser. }, Every chainsaw requires a different compression level according to its built-up and model number. The starter assembly often fails to rotate due to a weak connection between the pulley and the ignition rope. 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. Low pressure, 20 to 30 pounds is all you need. Below are the reasons the chain keeps coming loose and how to fix it. I used to have a Homelite that would do that if I left gas in it. A large engine has a huge capacity in its motor. You are using an out of date browser. Are you sure the starter rope isn't a little too short? Fine adjust everything and both saws start Normal now. It runs good after I get it started. Stihl MS192T Chainsaw Fuel Oil Tank Engine Housing Assembly OEM. 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. It very often kicks back and pulls the starter rope back in. Drain and discard the old fuel, mix new fuel and cycle oil in the ratio 50:1 in a container, shake it and then pour the mixture into the chainsaws fuel tank. It's also going to be wise to try to put the chainsaw somewhere that isn't exposed to constant sunlight since that can be a contributing factor to the oxidation. You may also notice that the chain saw loses power during operation. 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. Make sure it is snug but can also move freely by hand. I hope my epic guides will help you to choose,buy and maintain chainsaw. My /Sthil 034 is very difficult to start. Thank you for the responses. This may sometimes jam your chainsaws rings, causing it to become inoperable. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Reassemble the chainsaw, refill the fuel tank, crank the engine and check for oil along the bar. Are you sure the starter rope isn't a little too short? Pull the starter rope and look for a blue spark between the electrode of the spark plug. Pull the rope until it starts. after that I'd be looking at crank bearings. Also, remove the muffler and check for carbon buildup. I'm an arborist by profession & a blogger by passion. More information can be found on this page. Every chainsaw needs to have some compression to ensure that it operates well. What ratio mix is he using? The choke position is the fourth setting on the master control lever. For the chainsaw to function appropriately, you must maintain the proper amount of tension on the chain. I used to have a Homelite that would do that if I left gas in it. Use of this Web site constitutes acceptance of our. I would suggest clearing the cylinder by pulling the rope with the plug out. When there is too much fuel, it will not ignite, and the engine wont start. 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. Block the spark plugs hole by putting a nylon rope to prevent the piston from moving. Then Google "decarb". Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. A two-stroke gas-powered chainsaw uses relatively few moving parts. When you are doing a cold start, push the choke lever to the warm start when the engine starts to run. My one and only MS250 was a kicker to start it but that was the only problem. I bought it used around 1978. You are misunderstanding WHY water is put into carboned up engines. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. 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. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. When this pressure, or compression, is too low or high, the chainsaw . I would suspect the timing is too early. Recognised as a leading saw in the forestry industry, it is available in guide bar lengths 13"/32cm to 18"/45cm. Would not be afraid to do it to a 4, 6, or V-8. 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! what and or where is the metering lever.? When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. I got it started. NelsGarage.com All Rights Reserved 2021 Theme: Prefer by, Stihl Chainsaw Troubleshooting & How-to Guide. High compression in chainsaws is a dangerous problem that can lead to serious injuries. Check the tension 2. A chainsaw with no spark will shut down suddenly or not start at all. "mainEntityOfPage": { Press question mark to learn the rest of the keyboard shortcuts. When the motor warms up after about a minute, turn on the choke position. It is harmful to your machine to use old fuel. If your chainsaw doesnt automatically turn it off or you forget, the engine cuts off immediately. I've done it to high hour Kohler engines many times. Spark plugs that are not functioning properly are another probable cause of excessive compression. Don't know what to do at this point. 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. Compression gauges are not always accurate and different engines will provide different results. It may not display this or other websites correctly. 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. I was given (estate) a small McCulloch chain saw and it started and ran great. Indoor fly traps are an effective way to keep insects away from your home. Remove the ignition coil, test it using a multimeter or an ignition coil tester, and confirm your chainsaw models resistance specification. The saw is about 2 years old, light use. "headline":"Chainsaw has too much compression", Cleaned air filters and both were very dirty. "@type": "InteractionCounter", How Much Compression Should a Chainsaw Have. It's also possible the piston or cylinder are scored or carboned up. "@id":"https://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=toolt&th=435118", 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. When the fuel starts to turn stale, it gums up and clogs the carburetor just as it would in an unused lawnmower. Wash the dirty filter with a non-abrasive detergent and water. 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 } 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. "height": 57 Locate the spark plug from the top of the engine underneath the chain brake handle. Finally the fuel will be converted into energy. $99.95. Sometimes, this might be triggered by another problem that is impacting your system. 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. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . "logo": { When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. The carburetor is a significant part of the chainsaw. 1. saw has new carb 2. flywheel has been removed and key inspected. Subsequent starts are just as hard. 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. Your ignition rope must be intact properly with the pulley to work correctly. Any ideas? in the. Normally it's not a problem but if it was already difficult to pull it could be. I;ve read somewhere to put water? If the chainsaw is too much compression, it may be difficult to start. Of all the Stihl saws, the MS250 is the toughest to start in relation to it's size. So, If you feel too much compression while pulling a chainsaw, the possible reasons might be as below. Oct 24, 2011 / Chainsaw excessive compression #1 . Detailed, well-researched, and accurate home and garden information presented in an understandable format is our primary goal. Ron Cook. No compression when pulling start rope read more Expert Stihl ms 180 chain saw, new carb, spark plug, compression stihl ms 180 chain saw, new carb, spark plug, compression 110, new gas, still won't start what next, piston is not scored. "width": 200, I bought 2 032 Stihl saws at auction that pulled very hard. An engine is fit on the rear side of a chainsaw. If oil is in there it is what makes the engine feel like it is almost locked up. The lack of oil dries the chainsaw assembly, which causes high compression and becomes very difficult for you to handle the chainsaw. Thanks! Locate the tension adjustment screws to the side of the chainsaw guide bar. A clogged carburetor wont allow fuel into the engine, preventing it from starting. 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. Check the chain tension and adjust it if it is too loose or tight. 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?? You will notice the compression less. let it idle over lunch, just made sure to not go too long between filling it with gas, while running of course. Poke the oil feed hole with a 16-gauge wire to unclog it until it slides through the hole smoothly. Afterward, the beginning rope is pulled repeatedly until the gauge comes to a full stop on its own. My name is Chris Ross. A hot engine also requires more compression to convert furl into energy as compared to the colder one. everything is harder in a tree, not a conclusive test. To inspect the guide bar, disassemble the chain cover, chain and bar. The spark arrestor in a chainsaw traps exhaust products emitted from an internal combustion engine. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. It uncoils, tightens the spring, engages the clutch to start the engine. If this does not fix the issue, it may be necessary to replace the whole starting rope system with another one. 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. Currently I live in Austin, United States. Uninstall the spark arrestor and unblock it using a brush, but you can also replace it for efficiency. A 250 is a joy to pull start Compared to my 200+ compression ported saws with no decomp. If I drop start it I can pull it through 1 compression stroke. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. "name": "Yesterday's Tractor Co.", Hope this helps. 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?? 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. 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. The carburetor sucks fuel from the tank, mixes it with the right amount of air, and pushes the mixture into the combustion chamber. Remove the spark plugs and the e-clips attached to the sprocket on the engine shaft. 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. 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. It would give you rusted bearings. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. First thing I'd check is the pull start assy. Didnt somehow get straight oil in the cylinder did you? 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. It is best to put a new plug in after clearing. 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. Even with new spark plugs in, incorrectly removing and installing the spark plugs can prevent the engine from starting. The first step is to remove the cover that covers the spark plug on your chainsaw. Check the electrode gap of the spark plug and ensure it is 0.02 inches. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. The chainsaw has grooves all around the outer edge of the guide bar, and the chain has teeth that run within the bar rail to keep the chain in place and moving straight. It is a prevalent issue and can be fixed and detected easily without consulting a mechanic. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. Im Nelson, a DIY enthusiast with a bottomless can-do attitude. Flooding usually happens due to an underlying issue: a bad spark plug, bad gas, or a faulty carburetor. Oct 7, 2019 / Minimum compression for a Stihl 2 cycle #3 the actual numbers will vary from one tool to another Getting accurate numbers without special tools is quite difficult because of the small volumes. Unscrew the clutch assembly on top of the oil pump. It is, therefore, necessary to determine if the problem has been remedied by adding fresh fuel. It had a compression release, and it started and ran well. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright . The power of the motor of an engine is measured in its capacity. Insert the air filter and the spark plug, reconnect the spark plug wire, and close the opening. Neighbor brought me his Stihl MS250 complaining that it tries to pull his arm from socket when starting. chain saw compression release mod. Each chainsaw has a different level of compression. Move the selector lever up one position immediately or the saw will flood on the very next pull. or Best Offer. Chainsaw Parts. If it has to do with small engines, it's welcome here. check the cylinder & piston for carbon build-up, how much compression Does the chainsaw Engine need, How To Reset Echo 58-Volt Battery Charger. 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. I missed the "no carbon". In fact, Stihl thinks so highly of Motomix, that they will double the factory warranty on their Stihl 2-stroke tools if you use it. Generally covering everything under 25 HP. If the air filter is too clogged, you should replace it. Fine adjust everything and both saws start Normal now. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Cleaned it all up, and had it tuned up. I'll even do the labor for free. Every time you fuel the chainsaw, you should make sure to drain the old fuel first to avoid contaminating the new fuel. 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. 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. The Pulley compartment plays a massive role in retracting the ignition rope. By checking & repairing/replacing these, you can fix the issue. "dateModified": "2017-08-17", Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. Stihl 291 chainsaw too much compression Check the compression of the engine. Always change the spark plug after 100 operating hours of the chainsaw to avoid engine problems. Check the choke of the chainsaws engine and make sure it is completely closed. Try it, it may just do the trick! However, you still have to confirm the size of the gap before installing. Welcome! Don't put water into the 2 stroke. Hold the tip of the blade and adjust the tension of the chain correctly. Its just that its nearly impossible to pull. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. If the coil is faulty, there will be no spark to start the engine and run the chainsaw. Replace with a new starter house Problem 2: Damaged pulley system Solution: 1. I get it going now and its easier but its still a bear. Pull trigger and set full choke. If the chainsaw engine dies when you release the throttle, turn the low-speed screw with a screwdriver clockwise until it stops and then turns it counterclockwise once. It was metering lever. When the oil pimp or oiler is faulty, it will reduce the chainsaws performance and power. A reddit for all operators of chainsaws to post experience with tools, pictures of their new saws and old workhorses and any maintenance tips. "name": "Egbinor" "interactionStatistic": { 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 As the chain moves over the bar, it spreads the oil across the moving parts to reduce friction and heat. You can clean and mildly clogged carburetor but if it is too severe, replace it with one compatible with your chainsaw model. 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 hook up a drill to the nut on the clutch and start hard starting saws that way . The early 064, 044, 066 came with a red master control. 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. Carboned rings will decrease not increase compression. If it does maybe it is plugged. I've done it to high hour Kohler engines many times. 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. If anything prevents the right amount of fuel into the combustion chamber, the chainsaw wont start. 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. How To Fix Chainsaw Battery Charger Blinking Red? Step 1: Prepare the chainsaw Remove the spark plug from the chainsaw. I would suspect the timing is too early. I've seen it happen a couple times. The chain oil will keep the chain lubricated, keep off dirt and allow smooth movement. The ideal pressure range of the Stihl chainsaw is between 90 and 110 psi. Stihl MS 250 Chain Saw: The pull start will barely move the flywheel. Check for clogging around the bar oil. Make sure it's greased and the bushings are good. The compression limit should also be doubled if the engine capacity is 100 CC. If the chainsaw still wont start, it is defective and requires a replacement. I usual only choke my MS250 for one pull and no longer have the flooding issue. Soaking in water will do nothing but rust things up . Sometimes it kicks and the rope pulls right out of my hand. Sometimes the spring stops working correctly due to overuse and becomes brittle.
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