Garden Guides | Compression Tricks for Chainsaws 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?? The plug should be tight against your thumb. Remove The Chainsaw's Spark Plug Set The Pressure Test Gauge Tug On The Chainsaw's Starter Rope Reset The Chainsaw's Spark Plug Do The Thumb Test Remove The Spark Plug Place Your Thumb Over The Hole Tug On Your Chainsaw's Starter Rope Problems Caused By Too Little Or Too Much Compression Low pressure in a chainsaw High compression in a chainsaw If a chainsaw has a 2 stroke engine, then the maximum compression it requires is 110-130 PSI. Pull trigger and set full choke. Stihl Chainsaw Troubleshooting & How-to Guide - Nels Garage I tried draining the crankcase with the saw upside . Does the saw have a compression release? The early 064, 044, 066 came with a red master control. Pull the starter rope and look for a blue spark between the electrode of the spark plug. } The vibration of the tool during use can run some fasteners loose, preventing it from starting again. As far as compression, you can usually tell by how the saw pulls when starting it. Cleaned air filters and both were very dirty. Additionally, most spark plugs come pre-gapped. Would have to remove spark plug and rinse cylinder with gas to be able to start. Ok folks, I'm stumped. "description":"Discussion of Chainsaw has too much compression in the Tool Talk forum followed by comments. 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?? It may not display this or other websites correctly. Don't put water into the 2 stroke. Sparkplug was correct but I think it was a little flooded. I;ve read somewhere to put water? 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! "userInteractionCount": 23 Then Google decarb . 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. The chainsaw motor engine capacity can range from 30CC and 50CC to 150 CC. When this comes to a stop, it will come to a complete stop at a certain number, which is the compression of your chainsaw blade. Chainsaw Parts. Use recommedend chain oil lubricant. We got rid of both of those useless things . How big a fella are ya? How Much Compression Should A Chainsaw Have - Toolsadvisorpro Uninstall the spark arrestor and unblock it using a brush, but you can also replace it for efficiency. Versions MS 260, Bar length 37cm, RSC Stihl MS 250 Chain Saw: The pull start will barely move the - JustAnswer If the air filter is too clogged, you should replace it. "@type": "InteractionCounter", Pull the starter rope until you hear the first sign of it firing with a small burp. The second thing, Read More Stihl Chainsaw Charger Not WorkingContinue, Your email address will not be published. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . The flywheel is loose? It uncoils, tightens the spring, engages the clutch to start the engine. Wipe off any flammable fluid from the metal surface of the engine with a clean rag. 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 you do not replace the starter spring on time, it will cause you to replace the whole starter assembly. Try it, it may just do the trick! 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.. When there is too much fuel, it will not ignite, and the engine wont start. "@type": "Organization", As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. If you buy another battery, make sure it has the same voltage and amperage as the old battery. Some of the contributing reasons include a full tank of oil, carbon buildup on the exhaust system, and malfunctioning spark plugs. If you see any unusual movement of spring, then take it in to replace it. Make sure it's greased and the bushings are good. 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. I hook up a drill to the nut on the clutch and start hard starting saws that way . Sounds flooded, or maybe wrong sparkplug? 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. 4 Possible Problems & Solutions Problem 1: Damaged starter housing Solution: 1. John Deere and its logos are the registered trademarks of the John Deere Corporation. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. I got it going. You need to pull the exhaust to check that. Youll need to clean the cylinder and piston to fix this thoroughly. That model is extremely easy to flood. Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. 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. Reassemble the chainsaw, refill the fuel tank, crank the engine and check for oil along the bar. Take off the muffler or the carb to get access. Another big issue that causes too much high compression is the lack of oil in the starter system. Hello D beatty, Here is a link for two stroke engine air cycle, Guido. The power of the motor of an engine is measured in its capacity. water will not dissolve carbon; it is far too hard to be effected. Turn the idle speed clockwise until the saw idles and chain turns, and then make a one-fourth counterclockwise turn. The plug should be tight against your thumb. Chainsaw has too much compression - Tool Talk Forum pulls with little resistance, similar to my farm boss. I have had the cylinder off. Try blowing the crankcase out with air. Winterizing a pool is an important step in maintaining the longevity and health of your pool. check the cylinder & piston for carbon build-up, how much compression Does the chainsaw Engine need, How To Reset Echo 58-Volt Battery Charger. Usually, this happens when you use a chainsaw after a very long time or by wear and tear of the rope. Stihl MS 250 Chain Saw: The pull start will barely move the flywheel. Reddit and its partners use cookies and similar technologies to provide you with a better experience. If the chainsaw wont stay running when the engine is idle, adjust the carburetor. Make sure you have a replacement spark plug on hand in case the problem recurs in the future. I've been working on a Stihl 026 chainsaw that John found, and it is very hard to crank. Check the spark plug and replace it if needed. Other than damaged parts, using the choke position to start a warm saw often causes a flooded engine. I think that's what happened, although I didn't think such a small amount could do it. The Housing is the outer cover of the starter, and if it is damaged, your chainsaw suffers stiffness during a pull. First, remove the cylinder and piston from the chainsaw. I've done it to high hour Kohler engines many times. When this pressure, or compression, is too low or high, the chainsaw . The ideal pressure range of the Stihl chainsaw is between 90 and 110 psi. Read More Chainsaw Primer Bulb Temporary FixContinue, Pull out your battery from the chainsaw, and press the battery button sustainably for a minimum of 5 seconds before you release it. However, you still have to confirm the size of the gap before installing. Not sure it would accomplish anything on a 2-stroke chain saw engine. If not I'm honestly kinda stumped. On a 2 stroke the water would go into the crank case first and pool up. I bought 2 032 Stihl saws at auction that pulled very hard. The purpose of a choke in a chainsaw is to make cold starting more effortless, but if you do not use it properly. It is thus highly recommended that you drain the fuel from your chainsaw if it still has any old gasoline left in it. Final step: removing the old spark plug and installing the new one. 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. We have explained the most effective way to unflood a chainsaw engine below. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. It would give you rusted bearings. 3Pcs/lot Cylinder Compression Plug For STIHL 044 046 066 MS440 MS460 It is possible however to flood a two stroke which can cause the plug to fowl. You can check the compression by pulling the spark plug out and holding it in your hand. 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. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. Check the chain tension and adjust it if it is too loose or tight. Therefore, it does not need any compression rate to start. Let saw run until its warmed up, and go cut wood. 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, (quoted from post at 00:57:42 08/18/17) My chainsaw has gotten very hard to pull the rope. 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. Insert the air filter and the spark plug, reconnect the spark plug wire, and close the opening. 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. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. The key on the flywheel is in place and not sheered. It will be apparent if it is, but usually a scored saw won't run good, if at all. The spark arrestor in a chainsaw traps exhaust products emitted from an internal combustion engine. Recognised as a leading saw in the forestry industry, it is available in guide bar lengths 13"/32cm to 18"/45cm. Turn the engine to get under the piston and blow the crankcase out. 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. It takes a Bosch WSR6F or NGK BPMR7A. I changed to synthitic. I hope you understand the problems why your chainsaw is hard to pull. Admitted Woodaholic. You will notice the compression less. 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. It may not display this or other websites correctly. 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. Free shipping. The exhaust is black but no build up. Any ideas? I love to write about chainsaw for homeowners and professionals. Mar 24, 2019. Each chainsaw has a different level of compression. . 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. 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. Consequently, operating this chainsaw becomes a really difficult chore to do. If this does not fix the issue, it may be necessary to replace the whole starting rope system with another one. When the spark plug is removed, the engine turns Ask an Expert Car Questions Small Engine Troubleshooting JON, Small Engine Technician 2,680 Satisfied Customers Certified Small Engine Technician JON is online now Related Small Engine Questions Check the saws exterior for loose bolts, nuts, and screws and tighten them with an adjustable wrench or screwdriver. Your email address will not be published. chain saw compression release mod. That would have to be some puddle of oil for a MS250 to have a "bar oil leaking in and causing high compression problems" What kind of Stihl oil regular or synthitc, had an 025 years ago that was a real knuckel buster never checked compression but was using regular Stihl oil. 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. Sometimes it kicks and the rope pulls right out of my hand. If the chainsaw is too little compression, it may start easily but will not run smoothly. Get it ported and it brings it to another level. I'm also going to double check it has the correct resistor type spark plug. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Take better care of your chainsaw and perform regular maintenance according to the manufacturers recommendations to prevent any of these problems. This is because each machine is made differently and has various needs. 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.