The chainsaw motor engine capacity can range from 30CC and 50CC to 150 CC. . As a result, normal compression settings will change based on the kind of chainsaw machine you are using. This is bad practice, and can damage your chainsaw. It uncoils, tightens the spring, engages the clutch to start the engine. Make sure it's greased and the bushings are good. You never try to get it to run with the choke on. Free shipping. Loosen the nuts and bolts clockwise and then pull out the oil pump gently. I have a MS250 that has come up on compression since new. The starter assembly often fails to rotate due to a weak connection between the pulley and the ignition rope. Turn the engine to get under the piston and blow the crankcase out. Check for broken teeth on the chain and replace them if necessary. It runs good after I get it started. Poke the oil feed hole with a 16-gauge wire to unclog it until it slides through the hole smoothly. Can also be used with hedge trimmer attachment HS 246. Try it, it may just do the trick! Winterizing a pool is an important step in maintaining the longevity and health of your pool. To fix this problem, turn off the chain saw and let it sit for about 30 minutes to allow the excess gas to evaporate. The saw feels good in my hands and its got a surprising amount of power. You are misunderstanding WHY water is put into carboned up engines. The exhaust is black but no build up. runs way too fast. I was given (estate) a small McCulloch chain saw and it started and ran great. You never try to get it to run with the choke on. Would have to remove spark plug and rinse cylinder with gas to be able to start. 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. I have a MS250 that has come up on compression since new. If you buy another battery, make sure it has the same voltage and amperage as the old battery. When the oil pimp or oiler is faulty, it will reduce the chainsaws performance and power. Gas with ethanol also burns hotter than gasoline which can cause the engine to overheat and burn the plug electrodes. Too much carbon will do that, check the piston top and combustion chamber. Im Nelson, a DIY enthusiast with a bottomless can-do attitude. If it is flooded that should clear it up. Low pressure, 20 to 30 pounds is all you need. It would give you rusted bearings. Reddit and its partners use cookies and similar technologies to provide you with a better experience. We describe all the possible issues and also suggest the solutions to fix them too. I went with a meteor piston/cylinder set. It is usual for the chainsaw chains to come off with continued use, but there is usually an underlying cause when its too repetitive. "name": "Egbinor" None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. We are compensated for referring traffic and business to Amazon and other companies linked to on this site. My first chain saw was an old Homelite EZ with a blue metal case and a 20" bar. 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. 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. Every chainsaw engine has a different capacity depending upon its motor power. Make sure there is oil in the engine. So be sure to keep your chainsaw properly maintained and avoid compression problems. I think that's what I'd do. Clean any mildly dirty parts and replace all the damaged parts. 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 Would not be afraid to do it to a 4, 6, or V-8. How To Fix Chainsaw Battery Charger Blinking Red? It would give you rusted bearings. 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. If it does maybe it is plugged. If oil is in there it is what makes the engine feel like it is almost locked up. Advanced arborist chainsaw with a top handle and STIHL M-Tronic technology. 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. Follow the steps below on how to fix a flooded chainsaw engine. That is the nature of a 250. Its just that its nearly impossible to pull. If you notice the treads are worn, which prevents the device from pumping, replace it with a new one. 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. The other reason might be the use of the wrong type of oil for the climate. I've done it to high hour Kohler engines many times. $20.00 shipping. It had a compression release, and it started and ran well. 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. lol. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. If oil is in there it is what makes the engine feel like it is almost locked up. $799.99 CHOOSE AN OPTION Deliver From Store e.g., 123 Your Street, Virginia Beach, VA 12345 Add to Cart Order Online - Pick Up In Store Currently Shopping At: JC Licht Ace Hardware-Bridgeport (773) 523-8888 Change My dealer Features STIHL M-Tronic A 50CC engine needs 150 PSI compression. Block the spark plugs hole by putting a nylon rope to prevent the piston from moving. Replaced the chain and did some serious cutting and was so pleased. "text": "My chainsaw has gotten very hard to pull the rope. An excessive amount of compression in your chainsaws starting rope could also be indicated by the beginning rope failing to draw. 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. As far as compression, you can usually tell by how the saw pulls when starting it. You can also quickly fix this anomaly by ensuring a proper troubleshooting of the pulley compartment to find damages. Don't know what to do at this point. "interactionStatistic": { 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 "@context":"https://schema.org", If you find the brake drum moving, you must replace the needle bearing. (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 The purpose of a choke in a chainsaw is to make cold starting more effortless, but if you do not use it properly. Thus far, you have learned how to diagnose most problems with the Stihl chainsaw and how to fix the issues. In other words, the problem is in the trigger itself, not a. carb adjustment screw. 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. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. Although this is often true, it is not always the case. I think that's what I'd do. I'm also going to double check it has the correct resistor type spark plug. By checking & repairing/replacing these, you can fix the issue. The saw is about 2 years old, light use. Another big issue that causes too much high compression is the lack of oil in the starter system. If you experience low compression, pull the muffler and check the piston and cylinder for, Read More How Much Compression Should a Chainsaw HaveContinue, The possible reasons can be the battery not being charged, properly connected, or dead. Not sure it would accomplish anything on a 2-stroke chain saw engine. 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. Wear rubber gloves and hold the rubber plug and spark plug about 1-2cm from the metal surface of the engine unit. We got rid of both of those useless things . 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. Also, remove the muffler and check for carbon buildup. Hello. 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've done it to high hour Kohler engines many times. It is thus highly recommended that you drain the fuel from your chainsaw if it still has any old gasoline left in it. If the chainsaw still wont start, it is defective and requires a replacement. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. It is best to put a new plug in after clearing. 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. You should also make sure the new gas you use is appropriate for the chainsaw. John Deere and its logos are the registered trademarks of the John Deere Corporation. Do that to the starter side when you're looking at the starter assy. For the chainsaw to function appropriately, you must maintain the proper amount of tension on the chain. However, this will vary by model and compression readings alone are not enough to determine the condition of the engine. It will be apparent if it is, but usually a scored saw won't run good, if at all. A large engine has a huge capacity in its motor. "height": 57 A compression gauge is used to measure the compression of a chainsaw which works similarly to the tire gauge. Ron Cook. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. I thought all the fuel was out but there was some in the line yet. after that I'd be looking at crank bearings. Any help out thereEGBinOR Get you some Sea Foam at the local auto parts store. Use recommedend chain oil lubricant. Are you sure the starter rope isn't a little too short? Please use the navigational links to explore our website. Here is how to troubleshoot a malfunctioning spark plug. There is no carbon build up and all looks like new. If A two cycle engine gets flooded BADLY, oil can separate from the gas mix, accumulate in the crankcase and creates an hydrostatc lock. "logo": { If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . If the rails are shallow, you need to replace them. Hello EGBinOR, 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, Guido. 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. Would not be afraid to do it to a 4, 6, or V-8. of compression. 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. How big a fella are ya? 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. $75.00. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Suitable Replacement Stihl MS 250 C Compression Release Parts Cylinder Compression Plug Applicable Model For STIHL 021, 023, 024, 025, 026, 044, 046, 066, MS210, MS230, MS240, MS250, MS260, MS341, MS360, MS440, MS460, MS650, MS660 Chainsaw Parts Refer To Part No. 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. }, As the starter, spring plays a vital role in running starter assembly smoothly. Remove the spark plugs and the e-clips attached to the sprocket on the engine shaft. 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. "name": "Yesterday's Tractor Co.", Final step: removing the old spark plug and installing the new one. The extra effort to pull the saw is probably due to carbon build up on the piston crown and combustion chamber. Mar 24, 2019. . 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. Below we have discussed the most common reasons why your chainsaw wont idle and the best way to fix it. idle. The piston and rings are very shiney. 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. With the choke engaged, pull the starting rope several times again, and the chain saw should start on the third pull. To inspect the guide bar, disassemble the chain cover, chain and bar. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. Yes I tried that last time and it did help some. Turn the engine to get under the piston and blow the crankcase out. It will be apparent if it is, but usually a scored saw won't run good, if at all. 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. You can unclog the carburetor if the clog is minor. The ideal pressure range of the Stihl chainsaw is between 90 and 110 psi. A drastic and frankly silly thing to do though . NelsGarage will share the knowledge Ive gathered about different tools and give you tips to accomplish your DIY projects faster. Change in temperatures and dirt will cause clogging anywhere the oil passes, and this can prevent the oil from spread all across the bar. Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. I tried draining the crankcase with the saw upside . Create an account to follow your favorite communities and start taking part in conversations. }, 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! Turn the brake off. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. You can check the compression by pulling the spark plug out and holding it in your hand. Other than that, you should also use the correct spark plugs for your chainsaw. This may sometimes jam your chainsaws rings, causing it to become inoperable. For 503552201 Cylinder Compression Plug Package Include: 3 x Cylinder Plug Cylinder Compression Plug I bought it used around 1978. If this does not fix the issue, it may be necessary to replace the whole starting rope system with another one.