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 I've done it to high hour Kohler engines many times. It takes a Bosch WSR6F or NGK BPMR7A. When you start the chainsaw, it triggers the worm drive to engage the oiler to send oil through a port that releases onto the bar. I've done it to high hour Kohler engines many times. If the chainsaw is too much compression, it may be difficult to start. Do that to the starter side when you're looking at the starter assy. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. Usually, this happens when you use a chainsaw after a very long time or by wear and tear of the rope. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. For a better experience, please enable JavaScript in your browser before proceeding. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. Typically, several reasons cause too much compression in a chainsaw and these include but are not limited to: Old contaminated chainsaw fuel Chainsaw Starter rope issues Faulty spark plugs Chainsaw Carbon buildup Insufficient Chainsaw Oil Old and contaminated fuel If any of these components are worn or broken, the chain saw wont start even with fuel. 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. 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 "@type": "ImageObject", Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. Once the 250 is running, its fine. 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. The saw runs and starts great. Sometimes an adapter is needed to make a tight fit. Carboned rings will decrease not increase compression. If the coil is faulty, there will be no spark to start the engine and run the chainsaw. This increased distance will cause the chain to keep coming out of the guiding bar with the vibrating saw. It was easier to pull after I cleaned it up, but still tough. 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. Any ideas? NelsGarage will share the knowledge Ive gathered about different tools and give you tips to accomplish your DIY projects faster. I think that's what I'd do. Maybe the piston is hitting it. If so, show him how to start it on the ground with his foot in it or with the rear handle between his thighs. Repair or replace the damaged part 2. 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. 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. For 503552201 Cylinder Compression Plug Package Include: 3 x Cylinder Plug Cylinder Compression Plug How big a fella are ya? Does the saw have a compression release? All it needs is a few inches missing and it will pull too hard like the compression is too high. Always change the spark plug after 100 operating hours of the chainsaw to avoid engine problems. Create an account to follow your favorite communities and start taking part in conversations. 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. This can lead to serious injuries, including cuts and amputations. Save my name, email, and website in this browser for the next time I comment. A chainsaw Battery blinking red is one of the most frustrating things a woodcutter can, Read More How To Fix Chainsaw Battery Charger Blinking Red?Continue, The standard compression reading required for most 2-cycle chainsaw is around 100-110 psi to start. read more Vince O. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. 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. 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. Now, how much compression the engine of a chainsaw needs depends upon its motor capacity and temperature. Stihl 024 - Sherlock Holmes issue - help needed here. The Stihl chainsaw is a two-stroke gas-powered tool that uses a substantial amount of compression to pull fuel from the tank, mix it with air and ignite it to produce energy that runs the chainsaw. This article will help you fix the most commonly reported problems of a Stihl chainsaw. Turn the engine to get under the piston and blow the crankcase out. Here is how to troubleshoot a malfunctioning spark plug. The ignition coil transmits electricity to the spark plug to create a spark that ignites the engine. link to Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. I usual only choke my MS250 for one pull and no longer have the flooding issue. Sounds flooded, or maybe wrong sparkplug? The Stihl 066 chainsaw uses the same type of engine most gasoline-powered yard tools use, a two-cycle combustion engine. The choke position is the fourth setting on the master control lever. Every time you fuel the chainsaw, you should make sure to drain the old fuel first to avoid contaminating the new fuel. As the starter, spring plays a vital role in running starter assembly smoothly. What worked with my MS440 kicking problem should also work with that one. A clogged carburetor wont allow fuel into the engine, preventing it from starting. Clean any mildly dirty parts and replace all the damaged parts. I hook up a drill to the nut on the clutch and start hard starting saws that way . Also take the spark plug out and do the same. Fine adjust everything and both saws start Normal now. Welcome! Check for clogged shafts and jets, clogged carburetor, damaged valves, stuck levers, and damaged or warped diaphragms, all of which can interfere with the fueling process. It may not display this or other websites correctly. Over time or when using the wrong fuel, the fuel filter becomes too clogged and restricts fuel flow, killing the engine shortly after starting. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. The Stihl chainsaw uses a four-position lever ignition system called the master control lever. I would suspect the timing is too early. How Much Compression Should a Chainsaw Have. This compression converts fuel (any source) into the potential energy in the engine to start it. }. 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 got it started. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. Subsequent starts are just as hard. Take better care of your chainsaw and perform regular maintenance according to the manufacturers recommendations to prevent any of these problems. 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. 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. pulls with little resistance, similar to my farm boss. 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. I luv my 064. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. lol. I'm hearing thats just the nature of the beast. A hot engine also requires more compression to convert furl into energy as compared to the colder one. We will explain the causes of high compression and how you can quickly fix it to make it run smoothly. ", The saw runs and starts great. The second thing, Read More Stihl Chainsaw Charger Not WorkingContinue, Your email address will not be published. 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. When the oil pimp or oiler is faulty, it will reduce the chainsaws performance and power. "height": 57 Low pressure, 20 to 30 pounds is all you need. 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?? 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?? or Best . 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. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . Fine adjust everything and both saws start Normal now. Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. The starter assembly often fails to rotate due to a weak connection between the pulley and the ignition rope. The spark arrestor in a chainsaw traps exhaust products emitted from an internal combustion engine. Has anyone ever seen a stock MS250 or any stock stihl with 190psi of compression? More information can be found on this page. Other Professional Battery-Powered Chainsaws We Recommend: Stihl MSA 220 C-B 36V 16-inch Chainsaw: Solid design and increased power backed by Stihl's dealer network. i have a ms 250. However, you still have to confirm the size of the gap before installing. So, in our suggestion, one of the first things to check while feeling high compression is the starter spring. Could be the main bearings are loose, look for evidence of the coil rubbing the flywheel. But the saw just has a rubber piece on the top shroud with a slotted nut that just fastens it to a stud on the cylinder head, where the valve should be. "logo": { MS250 start compression relief stopped working. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright . We describe all the possible issues and also suggest the solutions to fix them too. }, Would not be afraid to do it to a 4, 6, or V-8. Thanks! 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. If the compression is too high or too low, the engine wont start. On a 2 stroke the water would go into the crank case first and pool up. Indoor fly traps are an effective way to keep insects away from your home. Try it, it may just do the trick! Turn the engine to get under the piston and blow the crankcase out. The compression limit should also be doubled if the engine capacity is 100 CC. Consequently, operating this chainsaw becomes a really difficult chore to do. Refill the chain oil by opening the cap on the chain oil tank, filling up the tank until the level is below the cap threads, and then replace the lid. I would never put water in it! Required fields are marked *. A chainsaw engine generates this compression through the explosion of the fuel in the combustion chamber and the movement of the crankcase.