The Pulley compartment plays a massive role in retracting the ignition rope. Spark plugs that are not functioning properly are another probable cause of excessive compression. Your ignition rope must be intact properly with the pulley to work correctly. You are misunderstanding WHY water is put into carboned up engines. let it idle over lunch, just made sure to not go too long between filling it with gas, while running of course. There is no idle when I release the trigger. 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. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. "mainEntityOfPage": { If there is any damage to the pulley at any stage, it will cause High Compression or stiffness during a pull.. Of all the Stihl saws, the MS250 is the toughest to start in relation to it's size. It very often kicks back and pulls the starter rope back in. This increased distance will cause the chain to keep coming out of the guiding bar with the vibrating saw. Pull trigger and set full choke. 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. Loosen the nuts holding the clutch cover and disconnect the chain shroud and remove the oil plate. Starting fluid will make the fuel more combustible and makes the process of clearing out the combustion chamber much quicker. Move the selector lever up one position immediately or the saw will flood on the very next pull. Make sure the gap is according to the specifications of your chainsaws engine. Now it has sat since the last use and I went to start it and it turned over maybe three times and the compression . Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. "url": "https://www.yesterdaystractors.com/graphics/smllogo.png", 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. If it is flooded that should clear it up. Any ideas? That is the nature of a 250. 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. It is effortless to check the starter spring; pull the ignition rope. This article will help you fix the most commonly reported problems of a Stihl chainsaw. Check the tension 2. or Best Offer. "@type": "Organization", Make sure the keyway is lined up correctly and tighten the nut down good and tight. . The ignition system is responsible for igniting the fuel and air mixture to produce energy that powers the chainsaw. 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. "@type":"DiscussionForumPosting", Step 1: Prepare the chainsaw Remove the spark plug from the chainsaw. Pull the starter rope until you hear the first sign of it firing with a small burp. Replace the fuel filters instead of cleaning them as they are pretty affordable and easy to install too. Usually, this happens when you use a chainsaw after a very long time or by wear and tear of the rope. 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 1. saw has new carb 2. flywheel has been removed and key inspected. 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. water will not dissolve carbon; it is far too hard to be effected. Try it, it may just do the trick! If you still have questions regarding high chainsaw compression, you can discuss them in the comments. The consent submitted will only be used for data processing originating from this website. 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. A chainsaw Battery blinking red is one of the most frustrating things a woodcutter can, Read More How To Fix Chainsaw Battery Charger Blinking Red?Continue, The standard compression reading required for most 2-cycle chainsaw is around 100-110 psi to start. This may sometimes jam your chainsaws rings, causing it to become inoperable. However, these moving parts, to stay moving, require a substantial amount of compression. Free shipping. Use an adjustable wrench to loosen the two nuts on both sides of the chainsaw. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. 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. The chainsaw motor engine capacity can range from 30CC and 50CC to 150 CC. So, replacing the ignition rope is a better option to keep everything working smoothly without any damage. Soaking in water will do nothing but rust things up . You never try to get it to run with the choke on. Block the spark plugs hole by putting a nylon rope to prevent the piston from moving. 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. Does the saw have a compression release? 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. Pull the rope until it starts. Would have to remove spark plug and rinse cylinder with gas to be able to start. You can unclog the carburetor if the clog is minor. Then Google decarb . The carburetors work in a chainsaw engine allows the right amount of fuel and air mixture into the combustion chamber. If the chainsaw still wont start, it is defective and requires a replacement. 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. I;ve read somewhere to put water? I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. I would never put water in it! }, 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. Being in the cutting services for more than 10 years, I know a thing or two about chainsaw. If the chainsaw wont stay running when the engine is idle, adjust the carburetor. 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. Carboned rings will decrease not increase compression. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. Use a can of carb cleaner sprayed into the breather/filter assembly. I got it going. Advanced arborist chainsaw with a top handle and STIHL M-Tronic technology. "url": "https://www.yesterdaystractors.com/graphics/smllogo.png", Starter fluids spray can help in those conditions Before pulling shoulder. How Much Compression Should a Chainsaw Have. OEM GOOD USED STIHL 048AV CHAINSAW SHORT BLOCK ENGINE 120 PSI COMPRESSION. 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. Are you sure the starter rope isn't a little too short? Take off the muffler or the carb to get access. Small Engine Technician Hold the tip of the blade and adjust the tension of the chain correctly. Help, can't pull start Stihl MS250 chainsaw, too much compression. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright . Press J to jump to the feed. A large engine has a huge capacity in its motor. All it needs is a few inches missing and it will pull too hard like the compression is too high. To inspect the guide bar, disassemble the chain cover, chain and bar. On a 2 stroke the water would go into the crank case first and pool up. It uncoils, tightens the spring, engages the clutch to start the engine. What are the numbers on your sparkplug? Save my name, email, and website in this browser for the next time I comment. I would suggest clearing the cylinder by pulling the rope with the plug out. 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. Too much carbon will do that, check the piston top and combustion chamber. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. To clean it, drain the fuel, spray some carburetor cleaner and loosen the residue with a small brush. "width": 200, Turn the engine to get under the piston and blow the crankcase out. Likewise, low compression in the engine will be slow and retarding and it is a warning sign of leakage in your engine. You are misunderstanding WHY water is put into carboned up engines. Remove the right side cover, bar, and chain. Pull the rope until it starts. I have had the cylinder off. 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. For 503552201 Cylinder Compression Plug Package Include: 3 x Cylinder Plug Cylinder Compression Plug Reassemble the chainsaw, refill the fuel tank, crank the engine and check for oil along the bar. Keep in mind that good maintenance and storage will reduce breakdowns and maintain your tools performance throughout its lifetime. Remove the entire carburetor and clean it. High compression in chainsaws is a dangerous problem that can lead to serious injuries. Recognised as a leading saw in the forestry industry, it is available in guide bar lengths 13"/32cm to 18"/45cm. Wash the dirty filter with a non-abrasive detergent and water. Subsequent starts are just as hard. I love to write about chainsaw for homeowners and professionals. Several reasons can cause your Stihl chainsaw to bog down when your pull the trigger. Also, remove the muffler and check for carbon buildup. in the cylinder overnight because the rings are cerboned up? Not sure it would accomplish anything on a 2-stroke chain saw engine. Stihl recommends using 89 octane gasoline without ethanol, and the gas should not contain more than 10% ethanol. Over time, soot from the engine clogs up the spark arrestor causing the chainsaw to stall. "@type": "ImageObject", Cleaned it all up, and had it tuned up. Check for dirty fuel tanks, clogged fuel filters, loose pipes, clogged air filters, and a dirty carburetor, which can all the fuel volume going into the combustion chamber. You have an option to either pull off the starter and clean it or look for an ideal replacement for your starter house. 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. How does it feel with the spark plug removed? Has someone invented a new kind of two stroke motor? John Deere and its logos are the registered trademarks of the John Deere Corporation. Compression gauges are not always accurate and different engines will provide different results. Activate the chain brake and then place the chainsaw on a flat, leveled surface. 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. 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. 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. Most fuels nowadays are a blend of ethanol which attracts moisture and speeds up the rotting process. Try it, it may just do the trick! I think that's what I'd do. You will notice the compression less. Thus far, you have learned how to diagnose most problems with the Stihl chainsaw and how to fix the issues. Its just that its nearly impossible to pull. 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. Repair or replace the damaged part 2. The key on the flywheel is in place and not sheered. "author": { In most cases, a buildup of carbon under the rings presses the rings against the cylinder, culminating in compression of the cylinder. The owner is complaining of hard to pull start. 24" is what I've got on mine, but it can handle a bigger bar. Other than that, you should also use the correct spark plugs for your chainsaw. The saw runs and starts great. Additionally, most spark plugs come pre-gapped. There might be a small stone or thing that is stuck inside the starter and causes the rope not to retract. I used to have a Homelite that would do that if I left gas in it. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Below are the reasons the chain keeps coming loose and how to fix it. "logo": { Flooding usually happens due to an underlying issue: a bad spark plug, bad gas, or a faulty carburetor. The purpose of a choke in a chainsaw is to make cold starting more effortless, but if you do not use it properly. Also check the air filters and make sure they are clean. Can also be used with hedge trimmer attachment HS 246. This could be understood by reading the further explanation below. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Even with new spark plugs in, incorrectly removing and installing the spark plugs can prevent the engine from starting. link to Indoor Fly Traps: 5 Things You Didn't Know About Indoor Fly Traps. Because of an absence of lubrication, the chain saw system becomes brittle, resulting in excessive compression of the chain saw mechanism. If it does maybe it is plugged. Not sure it would accomplish anything on a 2-stroke chain saw engine. Stihl MS 250 Chain Saw: The pull start will barely move the flywheel. 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. Once it's removed, you can place a gauge on the place of the spark plug. Trying to rotate the chain while a huge piece of wood is . 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. The flywheel is loose? If any of these components are worn or broken, the chain saw wont start even with fuel. "userInteractionCount": 23 SPONSORED. A chainsaw engine generates this compression through the explosion of the fuel in the combustion chamber and the movement of the crankcase. }, Oct 24, 2011 / Chainsaw excessive compression #1 . Confirm the spark plug gap, check and adjust with a feeler gauge or gaping tool. "@id": "https://www.yesterdaystractors.com/" Check the chain tension and adjust it if it is too loose or tight. The carburetor is a significant part of the chainsaw. Back to top derwen1959 Long Time User link to Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. Sometimes it kicks and the rope pulls right out of my hand. 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. It runs good after I get it started. Don't know what to do at this point. Any chance is it hydro locking because of gas? All it needs is a few inches missing and it will pull too hard like the compression is too high. Don't know what to do at this point. The piston and rings are very shiney. I've seen it happen a couple times. "image": { There are sprays (power tune) for removing carbon, but I doubt if that's your problem. "@type": "InteractionCounter", 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. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. water will not dissolve carbon; it is far too hard to be effected. The plug should be tight against your thumb. Therefore, most people will wonder why the chainsaw has too much compression. My first chain saw was an old Homelite EZ with a blue metal case and a 20" bar. A two-stroke gas-powered chainsaw uses relatively few moving parts. If this is the case, you may want to try lubricating the rope to see if it would assist to resolve the difficulties. Check for side play in the crankshaft. John Deere and its logos are the registered trademarks of the John Deere Corporation. The second thing, Read More Stihl Chainsaw Charger Not WorkingContinue, Your email address will not be published. The other reason might be the use of the wrong type of oil for the climate. I think you'll like it. in the, All Rights Reserved. Wipe off any flammable fluid from the metal surface of the engine with a clean rag. Guido Quoting Removed, click Modern View to see What?? Check the spark plug of the chain saw if the engine is not starting at all. The extra effort to pull the saw is probably due to carbon build up on the piston crown and combustion chamber. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them.
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