If it is too damaged, you should replace it. Choke cannot be used even when engine cold, or flooding occurs. If so, show him how to start it on the ground with his foot in it or with the rear handle between his thighs. The Housing is the outer cover of the starter, and if it is damaged, your chainsaw suffers stiffness during a pull. If the chainsaw is too much compression, it may be difficult to start. After that, using a ratchet, remove the spark plug from the engine. You have an option to either pull off the starter and clean it or look for an ideal replacement for your starter house. You can unclog the carburetor if the clog is minor. 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. Low pressure, 20 to 30 pounds is all you need. This can lead to serious injuries, including cuts and amputations. Carboned rings will decrease not increase compression. Also, remove the muffler and check for carbon buildup. Likewise, low compression in the engine will be slow and retarding and it is a warning sign of leakage in your engine. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. 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. I've done it to high hour Kohler engines many times. Admitted Woodaholic. The lack of oil dries the chainsaw assembly, which causes high compression and becomes very difficult for you to handle the chainsaw. I;ve read somewhere to put water? This is because each machine is made differently and has various needs. People sometimes try to cut down a tree that is too big for their chainsaw. I've done it to high hour Kohler engines many times. 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. Without proper compression, the engine will not be able to suck and use the fuel for combustion. If not I'm honestly kinda stumped. Confirm the spark plug gap, check and adjust with a feeler gauge or gaping tool. Soaking in water will do nothing but rust things up . Make sure the keyway is lined up correctly and tighten the nut down good and tight. If oil is in there it is what makes the engine feel like it is almost locked up. 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. Manage Settings Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. 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 heavy-duty chainsaw requires a large amount of compression, whereas a chainsaw with a smaller engine needs less compression to convert fuel into energy. Cleaned air filters and both were very dirty. "userInteractionCount": 23 Try blowing the crankcase out with air. That is what was told to me by the area distributor technician That is the nature of a 250. The engine creates a vacuum pressure inside it. { "image": { Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. A hot engine also requires more compression to convert furl into energy as compared to the colder one. I;ve read somewhere to put water? But it was stolen along with other tools around 1990. My husky 266xp has been that away from newjust pull over slow for 2 or 3 times and then try cranking.. You are misunderstanding WHY water is put into carboned up engines. Use a can of carb cleaner sprayed into the breather/filter assembly. By getting your pool ready for the winter, you can make sure it will be ready to use in the spring. 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. (there is some play when flywheel on shaft (nut not attached) 3. tank and oiler vents are operating 4. exhaust has been removed and spark arresting screen checked (clean) 5. piston/walls checked.. no scarring Quoting Removed, click Modern View to see Don't put water in the saw-ever. 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. I would suspect the timing is too early. JavaScript is disabled. The ignition coil transmits electricity to the spark plug to create a spark that ignites the engine. Don't know what to do at this point. Yeah, I must have flooded it as I was working on it. Turn the engine to get under the piston and blow the crankcase out. It was easier to pull after I cleaned it up, but still tough. } Other than that, you should also use the correct spark plugs for your chainsaw. Clean any mildly dirty parts and replace all the damaged parts. There are sprays (power tune) for removing carbon, but I doubt if that's your problem. The purpose of a choke in a chainsaw is to make cold starting more effortless, but if you do not use it properly. Stihl 024 - Sherlock Holmes issue - help needed here. 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 owner is complaining of hard to pull start. What is the minimum compression for my STIHL chainsaw? Not sure it would accomplish anything on a 2-stroke chain saw engine. Follow the steps below on how to fix a flooded chainsaw engine. However, you still have to confirm the size of the gap before installing. All it needs is a few inches missing and it will pull too hard like the compression is too high. A clear sign that you may have a chainsaw engine is when you smell gas while starting it. Although this is often true, it is not always the case. in the, All Rights Reserved. }, It uncoils, tightens the spring, engages the clutch to start the engine. i have a ms 250. I'm an arborist by profession & a blogger by passion. Get it ported and it brings it to another level. Convenient, durable and robust with minimum weight, the STIHL MS 260 can come with a number of optional features to make the job even easier. Check the chainsaws fuel if you have not used the tool for a while. Does the saw have a compression release? Your email address will not be published. Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. 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! A 250 is a joy to pull start Compared to my 200+ compression ported saws with no decomp. Hello D beatty, Here is a link for two stroke engine air cycle, Guido. High compression in chainsaws is a dangerous problem that can lead to serious injuries. I hope my epic guides will help you to choose,buy and maintain chainsaw. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. A heavy-duty engine gets hot faster and works better than a cold engine. Stihl MS290 MS390 MS310 Chainsaw Has Oil Tank Engine Housing Assembly OEM/ Bin G . Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. Thank you for the responses. 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. Therefore, it does not need any compression rate to start. 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! Also check the air filters and make sure they are clean. I bought it used around 1978. If you find the brake drum moving, you must replace the needle bearing. Another big issue that causes too much high compression is the lack of oil in the starter system. Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. 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 It is a prevalent issue and can be fixed and detected easily without consulting a mechanic. 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. 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. The power of the motor of an engine is measured in its capacity. "@id": "https://www.yesterdaystractors.com/" 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. Required fields are marked *. Indoor fly traps are an effective way to keep insects away from your home. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. Starter fluids spray can help in those conditions Before pulling shoulder. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. If this does not fix the issue, it may be necessary to replace the whole starting rope system with another one. Too much carbon will do that, check the piston top and combustion chamber. 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. ", By checking & repairing/replacing these, you can fix the issue. My /Sthil 034 is very difficult to start. Check if the wires are damaged or broken and replace them if necessary. The exhaust is black but no build up. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. $49.99. Sometimes the spring stops working correctly due to overuse and becomes brittle. The key on the flywheel is in place and not sheered. }, Fine adjust everything and both saws start Normal now. Free shipping. 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?? Below we have discussed the most common reasons why your chainsaw wont idle and the best way to fix it. Soaking in water will do nothing but rust things up . The manual for this model, and the parts breakdown, show a compression release valve. pulls with little resistance, similar to my farm boss. 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. Not sure it would accomplish anything on a 2-stroke chain saw engine. Thanks. MS250 start compression relief stopped working. Has someone invented a new kind of two stroke motor? 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 Can also be used with hedge trimmer attachment HS 246. A 250 has a fair amount of compression for a smaller saw but not that bad. Remove ignition coil and muffler. Would have to remove spark plug and rinse cylinder with gas to be able to start. Try it, it may just do the trick! Let saw run until its warmed up, and go cut wood. Also check the air filters and make sure they are clean. 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. The carburetor sucks fuel from the tank, mixes it with the right amount of air, and pushes the mixture into the combustion chamber. If you see any unusual movement of spring, then take it in to replace it. If it is flooded that should clear it up. I hook up a drill to the nut on the clutch and start hard starting saws that way . 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. Hold the tip of the blade and adjust the tension of the chain correctly. Every chainsaw requires a different compression level according to its built-up and model number. } idle. water will not dissolve carbon; it is far too hard to be effected. Save my name, email, and website in this browser for the next time I comment. Even though it was purchased "brand new" I'm not so sure. Get you some Sea Foam at the local auto parts store. of compression. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. no, afraid I don't have equipment to test. Posted December 27, 2017. Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. Would not be afraid to do it to a 4, 6, or V-8. Pull the starter rope and look for a blue spark between the electrode of the spark plug. "dateModified": "2017-08-17", Trying to rotate the chain while a huge piece of wood is . The early 064, 044, 066 came with a red master control. "name": "Yesterday's Tractor Co.", When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. Similarly, a 4-stroke engine needs 2 times more compression than a 2-stroke engine, around 180-210 PSI. That is what was told to me by the area distributor technician, 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. I'm hearing thats just the nature of the beast. I've got four other Stihl saws here, an 029, 036Pro, 015L, and an MS200T, only the 36Pro pulls this hard and only if I don't use the decomp button. The ignition system is responsible for igniting the fuel and air mixture to produce energy that powers the chainsaw. Get you some Sea Foam at the local auto parts store. Check the chain tension and adjust it if it is too loose or tight. The excess gas can be cleared simply by removing the plug and operating the starter a few times. Now it has sat since the last use and I went to start it and it turned over maybe three times and the compression . What worked with my MS440 kicking problem should also work with that one. Fine adjust everything and both saws start Normal now. 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. Being new carb, wasn't looking that direction educate a non mechanic. If it has to do with small engines, it's welcome here. However, this will vary by model and compression readings alone are not enough to determine the condition of the engine. 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. You can follow the steps on how to troubleshoot and revive it when it wont start. With the choke engaged, pull the starting rope several times again, and the chain saw should start on the third pull. Has someone invented a new kind of two stroke motor? Are you sure the starter rope isn't a little too short? Fuel filters trap dirt and contaminants from the fuel to prevent them from damaging the engine. If you could start an engine with the choke closed and not turn off the choke on time, you will end up flooding the engine with too much gas. All it needs is a few inches missing and it will pull too hard like the compression is too high. Sometimes, this might be triggered by another problem that is impacting your system. Turn the brake off. It is thus highly recommended that you drain the fuel from your chainsaw if it still has any old gasoline left in it. Your chainsaws compressive strength is measured with the use of a screw-in gauge. Remove the air filter cover and then slide off the rubber spark plug connector from the spark plug. Wash the dirty filter with a non-abrasive detergent and water. Wear rubber gloves and hold the rubber plug and spark plug about 1-2cm from the metal surface of the engine unit. 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. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. He checked.it clearly says that in the OP. Pull the starter rope until you hear the first sign of it firing with a small burp. Rinse the filter and allow it to air dry before reinstalling it. Activate the chain brake and then place the chainsaw on a flat, leveled surface. On a 2 stroke the water would go into the crank case first and pool up. The other cause of your chainsaws high compression could be the stuck ignition rope. Every chainsaw engine has a different capacity depending upon its motor power. Doesnt pull at all or just hard to pull. 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. Create an account to follow your favorite communities and start taking part in conversations. Take off the muffler or the carb to get access. 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. It is possible however to flood a two stroke which can cause the plug to fowl. It's an older saw I bought at a garage sale. Pull the rope until it starts. How does it feel with the spark plug removed? or very unlikely but happened to me on an 041 make sure the crank hasn't shifted and started to bind. Would not be afraid to do it to a 4, 6, or V-8. Try it, it may just do the trick! "@type": "ImageObject", 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. I think that's what I'd do. Then Google "decarb". 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. As far as compression, you can usually tell by how the saw pulls when starting it. Any ideas? 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. As the chain moves over the bar, it spreads the oil across the moving parts to reduce friction and heat. Make sure the gap is according to the specifications of your chainsaws engine.