Fuel filters trap dirt and contaminants from the fuel to prevent them from damaging the engine. 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. The exhaust is black but no build up. 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. This is bad practice, and can damage your chainsaw. Other than that, you should also use the correct spark plugs for your chainsaw. Without proper compression, the engine will not be able to suck and use the fuel for combustion. 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 That is what was told to me by the area distributor technician. 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. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. Hold the tip of the blade and adjust the tension of the chain correctly. That is what was told to me by the area distributor technician Check for side play in the crankshaft. Press J to jump to the feed. We got rid of both of those useless things . "@type": "ImageObject", 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. If this does not fix the issue, it may be necessary to replace the whole starting rope system with another one. If you are trying to start your chainsaw in winter and the oil you used for the chainsaw assembly is not suitable for the winter season, you also feel high compression. Is the spark plug the correct one for the saw? Stihl 024 - Sherlock Holmes issue - help needed here. A smaller gap will cause a weak spark and poor ignition of the engine, while a wider gap will not bring out any spark. Then Google decarb . First, remove the spark plug from the chainsaw. On a 2 stroke the water would go into the crank case first and pool up. You can clean and mildly clogged carburetor but if it is too severe, replace it with one compatible with your chainsaw model. If your chainsaw doesnt automatically turn it off or you forget, the engine cuts off immediately. { After that, using a ratchet, remove the spark plug from the engine. If I drop start it I can pull it through 1 compression stroke. The chain clutch might be, Read More Cordless Chainsaw Wont StartContinue, The most common reason is simply the wrong battery. 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 oil is in there it is what makes the engine feel like it is almost locked up. Carboned rings will decrease not increase compression. A compression gauge is used to measure the compression of a chainsaw which works similarly to the tire gauge. Does the saw have a compression release? It would give you rusted bearings. Press question mark to learn the rest of the keyboard shortcuts. My one and only MS250 was a kicker to start it but that was the only problem. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V. My chainsaw has gotten very hard to pull the rope. Turn the idle speed clockwise until the saw idles and chain turns, and then make a one-fourth counterclockwise turn. The end of the tester must protrude exact the same volume into the cylinder as the spark plug or the reading will be wrong. 1 2 Next J Joe_Power Joined Apr 18, 2013 Messages 651 Location USA - Coast to Coast, Border to Border Jun 2, 2015 #1 I just replaced the cylinder and piston on a stihl 036. Compression problems are usually due to an air leak in the engine, usually around the gaskets and seals of the crankshaft. "interactionStatistic": { I used to have a Homelite that would do that if I left gas in it. John Deere and its logos are the registered trademarks of the John Deere Corporation. A 250 has a fair amount of compression for a smaller saw but not that bad. The saw runs and starts great. Sometimes it kicks and the rope pulls right out of my hand. 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?? 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. Use a can of carb cleaner sprayed into the breather/filter assembly. 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. idle. If repeated cleaning does not fully unclog the carburetor, you will have to replace it. I'm an arborist by profession & a blogger by passion. Stihl 251 chainsaw. Additionally, most spark plugs come pre-gapped. let it idle over lunch, just made sure to not go too long between filling it with gas, while running of course. "@type": "Person", I missed the "no carbon". A chainsaw engine generates this compression through the explosion of the fuel in the combustion chamber and the movement of the crankcase. The excess gas can be cleared simply by removing the plug and operating the starter a few times. Move the selector lever up one position immediately or the saw will flood on the very next pull. Make sure it's greased and the bushings are good. This Indoor Fly Traps: 5 Things You Didn't Know About Indoor Fly Traps. You will notice the compression less. Put a solder in the sparkplug hole, turn the flywheel until the piston touch the solder, then measure the solder. If you regularly use the chainsaw, then there might be the possibility that your starter spring breaks off. 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 is best to put a new plug in after clearing. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. ", If cleaning does not help release oil onto the bar, the pump may be damaged and require replacing. An excessive amount of compression in your chainsaws starting rope could also be indicated by the beginning rope failing to draw. I bought it used around 1978. 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. stihl ms290 farm boss; By Ron Cook December 27, 2017 in General Chat. 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. The following have been addressed. I have a MS250 that has come up on compression since new. It may not display this or other websites correctly. If you still have questions regarding high chainsaw compression, you can discuss them in the comments. 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. "userInteractionCount": 23 With the choke engaged, pull the starting rope several times again, and the chain saw should start on the third pull. It is basically the same product as TruFuel (same base synthetic fuel with different synthetic oil) that is sold through Stihl dealers and endorsed for use in all Stihl 2-stroke engines. I just picked up a well used 025 that runs like a champ and has quite a bit of compression, I have not put a gauge on it but it will pull the starting handle out of my hands if I'm not paying attention. It is significantly tougher to pull over than an 024 or the new 241. A hot engine also requires more compression to convert furl into energy as compared to the colder one. "author": { The owner is complaining of hard to pull start. Take off the side cover, bar and chain and see if there is any play in the clutch side of the crank. 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!!! Quoting Removed, click Modern View to see That would be quite the trick to get the oil to separate out of the gas, LOL. The spark plug is located in the engine and ignites the fuel and air mixture, driving the piston and running the engine. The spark arrestor in a chainsaw traps exhaust products emitted from an internal combustion engine. You are using an out of date browser. A 50CC engine needs 150 PSI compression. A flooded engine is when there is too much gas in the combustion chamber, usually due to repeatedly starting the chainsaw using the recoil system without the engine starting. } The plug should be tight against your thumb. Replace with a new starter house Problem 2: Damaged pulley system Solution: 1. The piston and rings are very shiney. However, if I push downward on the trigger button, it slows down to. It is effortless to check the starter spring; pull the ignition rope. Carboned rings will decrease not increase compression. Follow the steps below on how to fix a flooded chainsaw 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. You may also notice that the chain saw loses power during operation. However, this will vary by model and compression readings alone are not enough to determine the condition of the engine. no, afraid I don't have equipment to test. } That is the nature of a 250. John Deere and its logos are the registered trademarks of the John Deere Corporation. Wipe off the excess fuel from the spark plug with a clean rag. water will not dissolve carbon; it is far too hard to be effected. Press J to jump to the feed. I got it started. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. Sometimes, this might be triggered by another problem that is impacting your system. So, If you feel too much compression while pulling a chainsaw, the possible reasons might be as below. What is the minimum compression for my STIHL chainsaw? Also take the spark plug out and do the same. I;ve read somewhere to put water? It is harmful to your machine to use old fuel. Cleaned air filters and both were very dirty. Locate the tension adjustment screws to the side of the chainsaw guide bar. Pull the recoil off and check for binding Pull rope or starter pawls misaligned. Repair or replace the damaged part 2. I would never put water in it! If it does maybe it is plugged. Make sure it is snug but can also move freely by hand. Why is the Garage Door Opener Light Not Working? Indoor fly traps are an effective way to keep insects away from your home.