This is bad practice, and can damage your chainsaw. A compression gauge is used to measure the compression of a chainsaw which works similarly to the tire gauge. Carbon buildup is yet another important factor in the increasing compression experienced by chain saws over time. The chainsaw motor engine capacity can range from 30CC and 50CC to 150 CC. Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. It will be apparent if it is, but usually a scored saw won't run good, if at all. If the chainsaw is too little compression, it may start easily but will not run smoothly. Advanced arborist chainsaw with a top handle and STIHL M-Tronic technology. Try blowing the crankcase out with air. water will not dissolve carbon; it is far too hard to be effected. We will explain the causes of high compression and how you can quickly fix it to make it run smoothly. Take better care of your chainsaw and perform regular maintenance according to the manufacturers recommendations to prevent any of these problems. Every chainsaw needs to have some compression to ensure that it operates well. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. Fine adjust everything and both saws start Normal now. I bought 2 032 Stihl saws at auction that pulled very hard. Remove the spark plug with a spark plug wrench and clean it with a brush to remove carbon scoring and dirt. Modern View Forum powered by phpBB 2001, 2005 phpBB Group. Even though it was purchased "brand new" I'm not so sure. 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. The second thing, Read More Stihl Chainsaw Charger Not WorkingContinue, Your email address will not be published. or Best Offer. Uninstall the spark arrestor and unblock it using a brush, but you can also replace it for efficiency. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. 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. 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. A chainsaw is going to be exposed to oxidation over time, but you can at least limit the process by storing your chainsaw well. While rope attached to a pulley, the further connection of the pulley is with springs and pawl to make sure the pulley is tensioned and helps in retracting and spinning. Being new carb, wasn't looking that direction educate a non mechanic. I would suspect the timing is too early. That is what was told to me by the area distributor technician Check for side play in the crankshaft. 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 after doing it.You might want to do it with screen removed from muffler. Stihl chain saw too much compression I had to take it apart Not sure it would accomplish anything on a 2-stroke chain saw engine. The compression limit should also be doubled if the engine capacity is 100 CC. The ignition coil transmits electricity to the spark plug to create a spark that ignites the engine. Would have to remove spark plug and rinse cylinder with gas to be able to start. STIHL Chainsaws FAQs | STIHL Product FAQs | STIHL USA I would suspect the timing is too early. My first chain saw was an old Homelite EZ with a blue metal case and a 20" bar. When the motor warms up after about a minute, turn on the choke position. Also, remove the muffler and check for carbon buildup. Recognised as a leading saw in the forestry industry, it is available in guide bar lengths 13"/32cm to 18"/45cm. Quoting Removed, click Modern View to see What?? Are you sure the starter rope isn't a little too short? I have a MS250 that has come up on compression since new. Make sure it's greased and the bushings are good. This site is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. Make sure it is snug but can also move freely by hand. The other reason might be the use of the wrong type of oil for the climate. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. The excess gas can be cleared simply by removing the plug and operating the starter a few times. There is no idle when I release the trigger. Try taking it out, Then holding the trigger while you pull fast. A lot of variables might contribute to excessive compression while using a chainsaw. I changed to synthitic. If oil is in there it is what makes the engine feel like it is almost locked up. Don't put water into the 2 stroke. ", in the, All Rights Reserved. Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. You can use a ratchet to do the task. Has someone invented a new kind of two stroke motor? Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. However, these moving parts, to stay moving, require a substantial amount of compression. Quoting Removed, click Modern View to see Don't put water in the saw-ever. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. Check the electrode gap of the spark plug and ensure it is 0.02 inches. Back to top derwen1959 Long Time User 4 Possible Problems & Solutions Problem 1: Damaged starter housing Solution: 1. Follow the steps below on how to fix a flooded chainsaw engine. If you buy another battery, make sure it has the same voltage and amperage as the old battery. It is possible however to flood a two stroke which can cause the plug to fowl. Stihl is a leading manufacturer of chainsaws and other handheld outdoor and landscaping power tools. It will be apparent if it is, but usually a scored saw won't run good, if at all. If there is any damage to the pulley at any stage, it will cause High Compression or stiffness during a pull.. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. NelsGarage.com All Rights Reserved 2021 Theme: Prefer by, Stihl Chainsaw Troubleshooting & How-to Guide. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. Stihl chainsaw compression test Joe_Power Jun 2, 2015 Not open for further replies. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. Also take the spark plug out and do the same. Repair or replace the damaged part 2. No carbon on top or on roof of cylinder. Carboned rings will decrease not increase compression. "image": { Turn the brake off. As a result of using bad fuel or leaving fuel in the chainsaw for a long time, the fuel evaporates and leaves behind a sticky substance that accumulates and clogged the carburetor. First, remove the cylinder and piston from the chainsaw. "publisher": { JavaScript is disabled. idle. }, If any of these components are worn or broken, the chain saw wont start even with fuel. 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. Indoor fly traps are an effective way to keep insects away from your home. 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. So, in our suggestion, one of the first things to check while feeling high compression is the starter spring. If it looks physically fine after cleaning it and you havent changed it in a few seasons, you should still replace it. Use recommedend chain oil lubricant. Let saw run until its warmed up, and go cut wood. It is best to put a new plug in after clearing. The early 064, 044, 066 came with a red master control. I've done it to high hour Kohler engines many times. Stihl MS290 MS390 MS310 Chainsaw Has Oil Tank Engine Housing Assembly OEM/ Bin G . Create an account to follow your favorite communities and start taking part in conversations. Thanks! Maybe the piston is hitting it. Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. Stihl 251 chainsaw. water will not dissolve carbon; it is far too hard to be effected. Make sure it's greased and the bushings are good. It very often kicks back and pulls the starter rope back in. Make sure you have a replacement spark plug on hand in case the problem recurs in the future. Check for clogging around the bar oil. 1. saw has new carb 2. flywheel has been removed and key inspected. I have a MS250 that has come up on compression since new. The plug should be tight against your thumb. Register today and take advantage of membership benefits. Use a can of carb cleaner sprayed into the breather/filter assembly. I hook up a drill to the nut on the clutch and start hard starting saws that way . Replace the fuel filters instead of cleaning them as they are pretty affordable and easy to install too. 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! There are sprays (power tune) for removing carbon, but I doubt if that's your problem. 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. Always change the spark plug after 100 operating hours of the chainsaw to avoid engine problems. It's an older saw I bought at a garage sale. 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. how much compression should a Stihl 044 have? - TractorByNet Similarly, a 4-stroke engine needs 2 times more compression than a 2-stroke engine, around 180-210 PSI. If that is true, I'd suspect that the timing is off and why it's ripping the cord from your hand. How Much Compression Should A Chainsaw Have? - Kyle's Garage High compression in chainsaws is a dangerous problem that can lead to serious injuries. The ideal pressure range of the Stihl chainsaw is between 90 and 110 psi. Locate the spark plug from the top of the engine underneath the chain brake handle. Has someone invented a new kind of two stroke motor? You have an option to either pull off the starter and clean it or look for an ideal replacement for your starter house. If I drop start it I can pull it through 1 compression stroke. We are compensated for referring traffic and business to Amazon and other companies linked to on this site. Why is the Garage Door Opener Light Not Working? If the reading is below or above the required range, then your ignition coil requires changing. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Change in temperatures and dirt will cause clogging anywhere the oil passes, and this can prevent the oil from spread all across the bar. I'm hearing thats just the nature of the beast. It is thus highly recommended that you drain the fuel from your chainsaw if it still has any old gasoline left in it. Finally the fuel will be converted into energy. Replace with a new starter house Problem 2: Damaged pulley system Solution: 1. Insufficient fuel in the system may result in excessive compression. How Much Compression Should a Stihl 066 Have? - SFGATE When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. Required fields are marked *. Chainsaws are very powerful tools, and if theyre not properly maintained, they can easily overcompress the chain, which can cause it to break. So, replacing the ignition rope is a better option to keep everything working smoothly without any damage. . Flooding usually happens due to an underlying issue: a bad spark plug, bad gas, or a faulty carburetor. Hello. If the chainsaw is too much compression, it may be difficult to start. Loosen the nuts holding the clutch cover and disconnect the chain shroud and remove the oil plate. 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! 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. Therefore, it does not need any compression rate to start. The other cause of your chainsaws high compression could be the stuck ignition rope. Subsequent starts are just as hard. Remove the spark plugs and the e-clips attached to the sprocket on the engine shaft. Didnt somehow get straight oil in the cylinder did you? The chainsaw motor engine capacity can range from 30CC and 50CC to 150 CC.
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