However, these moving parts, to stay moving, require a substantial amount of compression. runs way too fast. Over time or when using the wrong fuel, the fuel filter becomes too clogged and restricts fuel flow, killing the engine shortly after starting. Stihl oil has been used. Pull trigger and set full choke. Stihl 291 chainsaw too much compression Check the compression of the engine. I think that's what happened, although I didn't think such a small amount could do it. I went with a meteor piston/cylinder set. What Causes Too Much Compression on Poulan Chain Saws? Didnt somehow get straight oil in the cylinder did you? 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! Winterizing a pool is an important step in maintaining the longevity and health of your pool. }, Other than that, you should also use the correct spark plugs for your chainsaw. An engine is fit on the rear side of a chainsaw. Any ideas? The chain clutch might be, Read More Cordless Chainsaw Wont StartContinue, The most common reason is simply the wrong battery. I would never put water in it! Carboned rings will decrease not increase compression. 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!!! It is, therefore, necessary to determine if the problem has been remedied by adding fresh fuel. A chainsaw engine generates this compression through the explosion of the fuel in the combustion chamber and the movement of the crankcase. The ideal pressure range of the Stihl chainsaw is between 90 and 110 psi. A reddit for all operators of chainsaws to post experience with tools, pictures of their new saws and old workhorses and any maintenance tips. Always change the spark plug after 100 operating hours of the chainsaw to avoid engine problems. The excess gas can be cleared simply by removing the plug and operating the starter a few times. i have a ms 250. I've done it to high hour Kohler engines many times. It very often kicks back and pulls the starter rope back in. After all these operations are carried out, it is necessary to once again clean the saw from dirt, then turn it upside down and unscrew the four screws securing the engine to the chainsaw body. Here is how to troubleshoot a malfunctioning spark plug. Low pressure, 20 to 30 pounds is all you need. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. How to Reprogram a Chamberlain Garage Door Opener, How to Program a Universal Garage Door Opener, Toro Lawnmower Troubleshooting & How To Guide, Bostitch Nail Gun Troubleshooting & How to Guide. Make sure it's greased and the bushings are good. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. 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. } We and our partners use cookies to Store and/or access information on a device. I used to have a Homelite that would do that if I left gas in it. Would not be afraid to do it to a 4, 6, or V-8. Hope this helps. Save my name, email, and website in this browser for the next time I comment. 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. Below we have discussed the most common reasons why your chainsaw wont idle and the best way to fix it. The Stihl 066 chainsaw uses the same type of engine most gasoline-powered yard tools use, a two-cycle combustion engine. Gas with ethanol also burns hotter than gasoline which can cause the engine to overheat and burn the plug electrodes. The chain oil will keep the chain lubricated, keep off dirt and allow smooth movement. MS 260 - Robust chainsaw for forestry work - Stihl anthonyg_ma Original Author 16 years ago Canguy, thnks for the tips! Take better care of your chainsaw and perform regular maintenance according to the manufacturers recommendations to prevent any of these problems. Thus far, you have learned how to diagnose most problems with the Stihl chainsaw and how to fix the issues. As the starter, spring plays a vital role in running starter assembly smoothly. What is the minimum compression for my STIHL chainsaw? Would have to remove spark plug and rinse cylinder with gas to be able to start. We describe all the possible issues and also suggest the solutions to fix them too. You are misunderstanding WHY water is put into carboned up engines. "interactionType": "https://schema.org/CommentAction", Hello D beatty, Here is a link for two stroke engine air cycle, Guido. Generally the minimum is 110 lbs. 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! Quoting Removed, click Modern View to see What?? It can be from something as simple as starting the chainsaw wrongly to more severe issues like a damaged carburetor. Unscrew the spark plug using a ratchet and screw the compression gauge in its place. When there is too much fuel, it will not ignite, and the engine wont start. Locate the tension adjustment screws to the side of the chainsaw guide bar. If any of these components are worn or broken, the chain saw wont start even with fuel. I hope you understand the problems why your chainsaw is hard to pull. And some will have more. MS 201 T C-M | Top Handle Chainsaw | STIHL USA How to Test Stihl 180 Compression CIMFLOK.COM A lot of variables might contribute to excessive compression while using a chainsaw. Carboned rings will decrease not increase compression. That is what was told to me by the area distributor technician Check for side play in the crankshaft. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. Remove the filter, engine control lever and Stihl carburetor. how much compression should a Stihl 044 have? - TractorByNet Make sure there is oil in the engine. #3. Check the electrode gap of the spark plug and ensure it is 0.02 inches. Disengage the chain brake, turn on the ignition switch and install the new spark plug into the rubber connector. A heavy-duty engine gets hot faster and works better than a cold engine. If the chainsaw is too little compression, it may start easily but will not run smoothly. That is a high compression saw, pull the rope slowly until you feel resistance then give it a short quick pull. Tighten the tension screw with a screwdriver to tighten the chain around the bar. { The recoil starter in a chainsaw is a start mechanism that allows you to pull the rope. Over time, soot from the engine clogs up the spark arrestor causing the chainsaw to stall. 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. The switch might be damaged or the motor is burned out. If you still want to try and get carbon out of the saw either take it apart and clean it or use something along the lines of sea foam. Ask him if he's drop-starting it. Continue with Recommended Cookies. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. Has someone invented a new kind of two stroke motor? 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. I would never put water in it! The owner is complaining of hard to pull start. 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. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Flooding usually happens due to an underlying issue: a bad spark plug, bad gas, or a faulty carburetor. Turn the brake off. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. Register today and take advantage of membership benefits. 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. Trying to rotate the chain while a huge piece of wood is . Low pressure, 20 to 30 pounds is all you need. The engine creates a vacuum pressure inside it. Also, remove the muffler and check for carbon buildup. 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. "@id": "https://www.yesterdaystractors.com/" Cleaned air filters and both were very dirty. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. You can prevent the new starter rope from fraying by burning the two ends of the rope. "height": 57 You can check the compression by pulling the spark plug out and holding it in your hand. 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 in the cylinder overnight because the rings are cerboned up? To clean it, drain the fuel, spray some carburetor cleaner and loosen the residue with a small brush. That is what was told to me by the area distributor technician. Keep in mind that the stuck ignition rope can also damaged other parts inside the starter assembly. A cold engine will need the compression of 50-100 PSI whereas a hot engine will require compression above 150 PSI. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. The exhaust side of the piston is a warm gold. Subsequent starts are just as hard. Press question mark to learn the rest of the keyboard shortcuts. . The exhaust is black but no build up. A very loose chain will cause the blades to come out of the bar, while a very tight chain is also not ideal for the proper functioning of the chainsaw. High compression in chainsaws is a dangerous problem that can lead to serious injuries. A chainsaw with no spark will shut down suddenly or not start at all. Use a screw wrench to loosen the nuts on the guide bar side panel to give you room to adjust the chain. Hello. 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. Our aftermarket suitable replacement Stihl MS 250 C chainsaw compression release parts meet or beat OEM specs, offer a considerable cost savings, and usually ship in 24 - 48 hours. You can clean and mildly clogged carburetor but if it is too severe, replace it with one compatible with your chainsaw model. 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. 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?? This may sometimes jam your chainsaws rings, causing it to become inoperable. I got it going. 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. 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 Being in the cutting services for more than 10 years, I know a thing or two about chainsaw. ", chain saw compression release mod - Red Power Magazine 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 it is hard to pull, then check how the spring is performing. If the chainsaw still wont start, it is defective and requires a replacement. 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. A drastic and frankly silly thing to do though . Also check the air filters and make sure they are clean. Chainsaw Too Much Compression: Causes & Solution Any chance is it hydro locking because of gas? 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! As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. Use of this Web site constitutes acceptance of our. Wipe off lubricant and grime from the bar with a clean rag. I think that's what I'd do. Replace the spark plug with a new identical. 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. OEM GOOD USED STIHL 048AV CHAINSAW SHORT BLOCK ENGINE 120 PSI COMPRESSION. 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. How Much Compression Should a Chainsaw Have. Don't know what to do at this point. 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! of compression. Friction is usually the cause of a rope failing to draw when it should. Unscrew the spark plug wrench using a spark plug from the engine. Let saw run until its warmed up, and go cut wood. First thing I'd check is the pull start assy. Stihl chainsaw compression test Joe_Power Jun 2, 2015 Not open for further replies. 1. saw has new carb 2. flywheel has been removed and key inspected. Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. Most Stihl chainsaws have a resistance of 0.2-3.0 ohm on the primary coil and 5-20 kiloohm on the secondary coil but always confirm the correct reading for your model number. The purpose of a choke in a chainsaw is to make cold starting more effortless, but if you do not use it properly. The Housing is the outer cover of the starter, and if it is damaged, your chainsaw suffers stiffness during a pull. You never try to get it to run with the choke on. A problem in the ignition system is likely to be the culprit when the chainsaw doesnt spark. Stihl chainsaw low compression diagnoses and How To - YouTube When the motor warms up after about a minute, turn on the choke position. It's supposed to warm up later this week so I'll be able to do some more on this chain saw. Similarly, a 4-stroke engine needs 2 times more compression than a 2-stroke engine, around 180-210 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. It is best to put a new plug in after clearing. You need to pull the exhaust to check that. Recognised as a leading saw in the forestry industry, it is available in guide bar lengths 13"/32cm to 18"/45cm. Remove the spark plug with a spark plug wrench and clean it with a brush to remove carbon scoring and dirt. Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. Insert the air filter and the spark plug, reconnect the spark plug wire, and close the opening. The extra effort to pull the saw is probably due to carbon build up on the piston crown and combustion chamber. I have a MS250 that has come up on compression since new. Fine adjust everything and both saws start Normal now. Please use the navigational links to explore our website. 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. Get you some Sea Foam at the local auto parts store. Would not be afraid to do it to a 4, 6, or V-8. Blup throttle to bring it down to idle. All it needs is a few inches missing and it will pull too hard like the compression is too high. What are the numbers on your sparkplug? 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. 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. It may not display this or other websites correctly. If this is the case, you may want to try lubricating the rope to see if it would assist to resolve the difficulties. If it has damaged parts, replace it with a carburetor kit that fits your chainsaw model. Stihl MS250 Too High of Compression? - Arborist, Chainsaw & Tree Work Forum 4 Possible Problems & Solutions Problem 1: Damaged starter housing Solution: 1. On a 2 stroke the water would go into the crank case first and pool up. You have an option to either pull off the starter and clean it or look for an ideal replacement for your starter house. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. Additionally, most spark plugs come pre-gapped. Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. Wipe off any dirt and debris and check for any signs of damages. JavaScript is disabled. As a result, normal compression settings will change based on the kind of chainsaw machine you are using. You may also notice that the chain saw loses power during operation. Check the chain oiler and ensure it is functional. A drastic and frankly silly thing to do though . Because of an absence of lubrication, the chain saw system becomes brittle, resulting in excessive compression of the chain saw mechanism. You can unclog the carburetor if the clog is minor. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. It's also possible the piston or cylinder are scored or carboned up. Even with new spark plugs in, incorrectly removing and installing the spark plugs can prevent the engine from starting. Once the 250 is running, its fine. Chainsaw has too much compression - Tool Talk Forum If oil is in there it is what makes the engine feel like it is almost locked up. 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. When your Stihl chainsaw doesnt start after changing the spark plug and fuel, some common problems to look for can help diagnose the source of the issue. I love to write about chainsaw for homeowners and professionals. let it idle over lunch, just made sure to not go too long between filling it with gas, while running of course. Compression gauges are not always accurate and different engines will provide different results. 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. "datePublished": "2017-08-17", Apparently gas would seep int crankcase and over several months of setting gas would evaporate leaving oil behind and first time it was pulled would suck oil into the cylinder.