Blup throttle to bring it down to idle. Turn the brake off. Oct 24, 2011 / Chainsaw excessive compression #1 . If it does maybe it is plugged. If you do not replace the starter spring on time, it will cause you to replace the whole starter assembly. 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. My first chain saw was an old Homelite EZ with a blue metal case and a 20" bar. A drastic and frankly silly thing to do though . You are misunderstanding WHY water is put into carboned up engines. Although this is often true, it is not always the case. Similarly, a 4-stroke engine needs 2 times more compression than a 2-stroke engine, around 180-210 PSI. The saw runs and starts great. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. That is a high compression saw, pull the rope slowly until you feel resistance then give it a short quick pull. 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. I'll even do the labor for free. So, in our suggestion, one of the first things to check while feeling high compression is the starter spring. 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. water will not dissolve carbon; it is far too hard to be effected. First thing I'd check is the pull start assy. The ideal pressure range of the Stihl chainsaw is between 90 and 110 psi. Reddit and its partners use cookies and similar technologies to provide you with a better experience. 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. Any ideas? Yeah, I must have flooded it as I was working on it. Does the saw have a compression release? 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, (quoted from post at 00:57:42 08/18/17) My chainsaw has gotten very hard to pull the rope. 24" is what I've got on mine, but it can handle a bigger bar. Would have to remove spark plug and rinse cylinder with gas to be able to start. 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. You will notice the compression less. A 50CC engine needs 150 PSI compression. Another big issue that causes too much high compression is the lack of oil in the starter system. It runs good after I get it started. 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! Runs well, except it. Wash the dirty filter with a non-abrasive detergent and water. Below we have discussed the most common reasons why your chainsaw wont idle and the best way to fix it. Are you sure the starter rope isn't a little too short? Low pressure, 20 to 30 pounds is all you need. "@type": "Organization", Guido 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. Check the tension 2. Check the spark plug and replace it if needed. Not sure it would accomplish anything on a 2-stroke chain saw engine. After that, using a ratchet, remove the spark plug from the engine. Carbon buildup is yet another important factor in the increasing compression experienced by chain saws over time. Whether you are a beginner or a professional woodworker, knowing how to fix your chainsaw will save you time and money seeking help from a service center. Most fuels nowadays are a blend of ethanol which attracts moisture and speeds up the rotting process. A reddit for all operators of chainsaws to post experience with tools, pictures of their new saws and old workhorses and any maintenance tips. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright . Can also be used with hedge trimmer attachment HS 246. Has someone invented a new kind of two stroke motor? 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. in the. If the chainsaw is too much compression, it may be difficult to start. I think that's what I'd do. 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. Youre 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. Try taking it out, Then holding the trigger while you pull fast. What usually happens is that the guide bar gets stuck in the tree and they keep running the engine while trying to force the bar out of the tree somehow. Check the chainsaws fuel if you have not used the tool for a while. "dateModified": "2017-08-17", Then Google "decarb". I would never put water in it! I think that's what I'd do. 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. Hello D beatty, Here is a link for two stroke engine air cycle, Guido. Take better care of your chainsaw and perform regular maintenance according to the manufacturers recommendations to prevent any of these problems. 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. Without proper compression, the engine will not be able to suck and use the fuel for combustion. Fine adjust everything and both saws start Normal now. Get you some Sea Foam at the local auto parts store. Tighten the tension screw with a screwdriver to tighten the chain around the bar. Disconnect the spark plug from the engine and inspect if it is damaged, eroded, or dirty. 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. Make sure you have a gauge with a schrader valve right at the tip of the spark plug adapter or you will get a low reading every time. Reassemble the chainsaw, refill the fuel tank, crank the engine and check for oil along the bar. Generally covering everything under 25 HP. As the chain moves over the bar, it spreads the oil across the moving parts to reduce friction and heat. The carburetors work in a chainsaw engine allows the right amount of fuel and air mixture into the combustion chamber. Remove the spark plugs and the e-clips attached to the sprocket on the engine shaft. There might be a small stone or thing that is stuck inside the starter and causes the rope not to retract. Any chance is it hydro locking because of gas? (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 If not I'm honestly kinda stumped. In a similar vein, if the wrong kind of oil is used, the compression may be increased. I bought 2 032 Stihl saws at auction that pulled very hard. Don't put water into the 2 stroke. 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. I went with a meteor piston/cylinder set. If you still have questions regarding high chainsaw compression, you can discuss them in the comments. It is significantly tougher to pull over than an 024 or the new 241. }, Replaced the chain and did some serious cutting and was so pleased. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V. How Much Does it Cost to Install a Garage Door Opener? The plug should be tight against your thumb. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . Every chainsaw engine has a different capacity depending upon its motor power. A lot of variables might contribute to excessive compression while using a chainsaw. 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! The first step is to remove the cover that covers the spark plug on your chainsaw. A heavy-duty engine gets hot faster and works better than a cold engine. It may not display this or other websites correctly. I'm hearing thats just the nature of the beast. The key on the flywheel is in place and not sheered. If you refuel your chainsaw and it still won,t start, below are some of the possible causes and solutions that will get the chainsaw functioning again. It runs good after I get it started. If it does maybe it is plugged. I think that's what happened, although I didn't think such a small amount could do it. I would suggest clearing the cylinder by pulling the rope with the plug out. Replace the fuel filters instead of cleaning them as they are pretty affordable and easy to install too. When there is too much fuel, it will not ignite, and the engine wont start. Here is a link for two stroke engine air cycle. That is the nature of a 250. "width": 200, Low pressure, 20 to 30 pounds is all you need. A hot engine also requires more compression to convert furl into energy as compared to the colder one. Cleaned air filters and both were very dirty. It is typical for the Stihl chainsaw to develop some issues, and when this happens, some basic troubleshooting will help identify the source of the issue and solution to help it run smoothly. Sounds like it was broken in "right", show the guy how to start it and tell him to be happy. The compression limit should also be doubled if the engine capacity is 100 CC. "@type": "InteractionCounter", If that doesnt work, try gently tapping on the side of the bulb with a screwdriver or other tool. The spark plug is located in the engine and ignites the fuel and air mixture, driving the piston and running the engine. You can use a ratchet to do the task. I would never put water in it! How Many Amps Does a Garage Door Opener Use? Not sure it would accomplish anything on a 2-stroke chain saw engine. If it has to do with small engines, it's welcome here. Additionally, most spark plugs come pre-gapped. Carboned rings will decrease not increase compression. Make sure the keyway is lined up correctly and tighten the nut down good and tight. It may not display this or other websites correctly. check the cylinder & piston for carbon build-up, how much compression Does the chainsaw Engine need, How To Reset Echo 58-Volt Battery Charger. Move the selector lever up one position immediately or the saw will flood on the very next pull. Make sure the crank taper is clean and the flywheel taper also. The recoil starter in a chainsaw is a start mechanism that allows you to pull the rope. Required fields are marked *. "@type": "Person", $99.95. Try it, it may just do the trick! After initial pull on rope (which feels like vapor lock on cylinder), saw will start on second or third pull. That model is extremely easy to flood. Also take the spark plug out and do the same. Quoting Removed, click Modern View to see Don't put water in the saw-ever. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. I hope you understand the problems why your chainsaw is hard to pull. When the motor warms up after about a minute, turn on the choke position. or Best Offer. If it is too damaged, you should replace it. Thanks! $49.99. I would suspect the timing is too early. How Much Compression Should a Chainsaw Have. Pull the recoil off and check for binding Pull rope or starter pawls misaligned. Trying to rotate the chain while a huge piece of wood is . Remove the right side cover, bar, and chain. 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 following have been addressed. I have a MS250 that has come up on compression since new. How big a fella are ya? 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. The chainsaw motor engine capacity can range from 30CC and 50CC to 150 CC. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. 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. If it is not physically damaged, clean it with clean gasoline and a rag. Confirm the spark plug gap, check and adjust with a feeler gauge or gaping tool. 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. Remove ignition coil and muffler. Sounds flooded, or maybe wrong sparkplug? If the chainsaw is too much compression, it may be difficult to start.