"name": "Yesterday's Tractor Co.", 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. Unscrew the clutch assembly on top of the oil pump. If the chainsaw is too much compression, it may be difficult to start. 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. How big a fella are ya? This can lead to serious injuries, including cuts and amputations. I can probably find one with at most 65 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! 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. The early 064, 044, 066 came with a red master control. Your chainsaws compressive strength is measured with the use of a screw-in gauge. On a 2 stroke the water would go into the crank case first and pool up. Use recommedend chain oil lubricant. "logo": { MS250 start compression relief stopped working. 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. 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. "@type": "InteractionCounter", Remove the air filter, wash it with detergent and water and scrub off the dirt with a brush. The carburetor sucks fuel from the tank, mixes it with the right amount of air, and pushes the mixture into the combustion chamber. 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. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Without proper compression, the engine will not be able to suck and use the fuel for combustion. Don't know what to do at this point. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. Keep in mind that good maintenance and storage will reduce breakdowns and maintain your tools performance throughout its lifetime. water will not dissolve carbon; it is far too hard to be effected. Any ideas? The saw feels good in my hands and its got a surprising amount of power. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. Posted December 27, 2017. In a similar vein, if the wrong kind of oil is used, the compression may be increased. Remove the spark plugs and the e-clips attached to the sprocket on the engine shaft. Start new topic; Recommended Posts. Of all the Stihl saws, the MS250 is the toughest to start in relation to it's size. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. When it comes to compression values, those between 90 and 110 psi are deemed to be acceptable. 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. The flywheel is loose? If I drop start it I can pull it through 1 compression stroke. 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!!! A compression gauge is used to measure the compression of a chainsaw which works similarly to the tire gauge. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. Normally it's not a problem but if it was already difficult to pull it could be. or Best Offer. You're familiar with how to start a stihl yes? Lift the bars nose and tighten the nuts on the sidebar to secure the sidebar and guide bar in place. 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. My question is what is causing the trigger to not slow down. Press question mark to learn the rest of the keyboard shortcuts. Unscrew the spark plug using a ratchet and screw the compression gauge in its place. Thanks. { About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright . 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 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. Locate the spark plug from the top of the engine underneath the chain brake handle. If you still have questions regarding high chainsaw compression, you can discuss them in the comments. If any part of a carburetor has issues, the right amount of fuel/air mixture wont pump into the chamber, therefore, preventing the engine from starting. water will not dissolve carbon; it is far too hard to be effected. All it needs is a few inches missing and it will pull too hard like the compression is too high. Any ideas? Stihl chainsaw compression test Joe_Power Jun 2, 2015 Not open for further replies. Press J to jump to the feed. Check for side play in the crankshaft. We describe all the possible issues and also suggest the solutions to fix them too. Small Engine Technician stihl ms290 farm boss; By Ron Cook December 27, 2017 in General Chat. I used to have a Homelite that would do that if I left gas in it. The following have been addressed. You can check the compression by pulling the spark plug out and holding it in your hand. It would give you rusted bearings. We and our partners use cookies to Store and/or access information on a device. You should also make sure the new gas you use is appropriate for the chainsaw. I've done it to high hour Kohler engines many times. 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. If that is true, I'd suspect that the timing is off and why it's ripping the cord from your hand. It's an older saw I bought at a garage sale. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. To inspect the guide bar, disassemble the chain cover, chain and bar. There is no idle when I release the trigger. Save my name, email, and website in this browser for the next time I comment. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. This Indoor Fly Traps: 5 Things You Didn't Know About Indoor Fly Traps. Replace the fuel filters instead of cleaning them as they are pretty affordable and easy to install too. 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 would never put water in it! 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. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Unscrew the spark plug wrench using a spark plug from the engine. If you find the brake drum moving, you must replace the needle bearing. The compression limit should also be doubled if the engine capacity is 100 CC. Use a brush and cloth to clean and remove any dirt, mud, or debris that can interfere with the controlsclean around the chain brake lever, the air filter housing, and the filter. Indoor fly traps are an effective way to keep insects away from your home. Soaking in water will do nothing but rust things up . . 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. Spark plugs that are not functioning properly are another probable cause of excessive compression. 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. Fuel filters trap dirt and contaminants from the fuel to prevent them from damaging the engine. Pour starting fluid into the carburetor and crank the engine several times. It would give you rusted bearings. A two-stroke gas-powered chainsaw uses relatively few moving parts. Check for any cracks and damages and replace if necessary. "image": { 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. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Create an account to follow your favorite communities and start taking part in conversations. Now it has sat since the last use and I went to start it and it turned over maybe three times and the compression . If repeated cleaning does not fully unclog the carburetor, you will have to replace it. "name": "Egbinor" Generally the minimum is 110 lbs. 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. Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. If you buy another battery, make sure it has the same voltage and amperage as the old battery. First, remove the spark plug from the chainsaw. 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. Replace the spark plug with a new identical. The spark arrestor in a chainsaw traps exhaust products emitted from an internal combustion engine. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. You are using an out of date browser. Each chainsaw has a different level of compression. I think that's what I'd do. #1.