It is possible however to flood a two stroke which can cause the plug to fowl. Press question mark to learn the rest of the keyboard shortcuts. Carbon build-up in cylinder & piston, bad needle bearing, overused starter spring, oil in the starter system, old or bad fuel, etc can cause too much compression in Chainsaws. Then Google decarb . Your chainsaws compressive strength is measured with the use of a screw-in gauge. Getting these problems resolved is a rather straightforward process. The excess gas can be cleared simply by removing the plug and operating the starter a few times. Minimum compression for a Stihl 2 cycle | Lawn Mower Forum Why is the Garage Door Opener Light Not Working? JavaScript is disabled. Carboned rings will decrease not increase compression. 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. 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. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. Would have to remove spark plug and rinse cylinder with gas to be able to start. Would not be afraid to do it to a 4, 6, or V-8. 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. A reddit for all operators of chainsaws to post experience with tools, pictures of their new saws and old workhorses and any maintenance tips. of compression. Stihl chainsaw low compression diagnoses and How To - YouTube 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. It runs good after I get it started. Pull the starter rope until you hear the first sign of it firing with a small burp. You can check the compression by pulling the spark plug out and holding it in your hand. Although this is often true, it is not always the case. Chainsaw Parts. 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 Remove the air filter cover and then slide off the rubber spark plug connector from the spark plug. read more Vince O. I thought all the fuel was out but there was some in the line yet. Use a can of carb cleaner sprayed into the breather/filter assembly. Thus far, you have learned how to diagnose most problems with the Stihl chainsaw and how to fix the issues. Likewise, low compression in the engine will be slow and retarding and it is a warning sign of leakage in your engine. Being in the cutting services for more than 10 years, I know a thing or two about chainsaw. Lift the bars nose and tighten the nuts on the sidebar to secure the sidebar and guide bar in place. 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. No carbon on top or on roof of cylinder. "@type": "ImageObject", It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Runs well, except it. Help, can't pull start Stihl MS250 chainsaw, too much compression NelsGarage will share the knowledge Ive gathered about different tools and give you tips to accomplish your DIY projects faster. Each chainsaw has a different level of compression. I bought it used around 1978. Stihl Chainsaw running too fast - HomeOwnersHub Maybe the piston is hitting it. Make sure it's greased and the bushings are good. If that is true, I'd suspect that the timing is off and why it's ripping the cord from your hand. When there is too much fuel, it will not ignite, and the engine wont start. The piston and rings are very shiney. "@type": "Person", "@type": "WebPage", Read More Chainsaw Primer Bulb Temporary FixContinue, Pull out your battery from the chainsaw, and press the battery button sustainably for a minimum of 5 seconds before you release it. It can be from something as simple as starting the chainsaw wrongly to more severe issues like a damaged carburetor. Sometimes the spring stops working correctly due to overuse and becomes brittle. 3Pcs/lot Cylinder Compression Plug For STIHL 044 046 066 MS440 MS460 All it needs is a few inches missing and it will pull too hard like the compression is too high. You may also notice that the chain saw loses power during operation. The Stihl 066 chainsaw uses the same type of engine most gasoline-powered yard tools use, a two-cycle combustion engine. STIHL Chainsaws FAQs | STIHL Product FAQs | STIHL USA If it is hard to pull, then check how the spring is performing. Friction is usually the cause of a rope failing to draw when it should. I've done it to high hour Kohler engines many times. If this is the case, you may want to try lubricating the rope to see if it would assist to resolve the difficulties. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. 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. This is because your oil is not rated to get to work at a low temperature. When the fuel starts to turn stale, it gums up and clogs the carburetor just as it would in an unused lawnmower. It runs good after I get it started. If the spark plug is too corroded or the electrode is faulty, it cannot create an electrical current to start the system. anthonyg_ma Original Author 16 years ago Canguy, thnks for the tips! There is no idle when I release the trigger. If the chainsaw is too much compression, it may be difficult to start. First, remove the cylinder and piston from the chainsaw. The saw runs and starts great. link to Indoor Fly Traps: 5 Things You Didn't Know About Indoor Fly Traps. I would suspect the timing is too early. 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. lol. I missed the "no carbon". Chainsaw has too much compression - Tool Talk Forum Would not be afraid to do it to a 4, 6, or V-8. If your chainsaw doesnt automatically turn it off or you forget, the engine cuts off immediately. after that I'd be looking at crank bearings. Sometimes an adapter is needed to make a tight fit. That model is extremely easy to flood. Mar 24, 2019. 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. When people did it years ago it was with 4 stroke engines where the water is flowing straight into the cylinder. The Pulley compartment plays a massive role in retracting the ignition rope. I hook up a drill to the nut on the clutch and start hard starting saws that way . 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. Stihl chain saw too much compression I had to take it apart Generally the minimum is 110 lbs. In addition, you should check the muffler and piston while youre at this point. He checked.it clearly says that in the OP. Every chainsaw needs to have some compression to ensure that it operates well. water will not dissolve carbon; it is far too hard to be effected. If a chainsaw has a 2 stroke engine, then the maximum compression it requires is 110-130 PSI. 4 Possible Problems & Solutions Problem 1: Damaged starter housing Solution: 1. It is usual for the chainsaw chains to come off with continued use, but there is usually an underlying cause when its too repetitive. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. You can follow the steps on how to troubleshoot and revive it when it wont start. Does the saw have a compression release? Animated Two Stoke Engine Air Cycle, My husky 266xp has been that away from newjust pull over slow for 2 or 3 times and then try cranking.. My husky 266xp has been that away from newjust pull over slow for 2 or 3 times and then try cranking.. However, these moving parts, to stay moving, require a substantial amount of compression. Neighbor brought me his Stihl MS250 complaining that it tries to pull his arm from socket when starting. A faulty spark plug will have carbon, dirt, and oil blocking the insulator nose, preventing it from firing consistently. Not sure it would accomplish anything on a 2-stroke chain saw engine. Remove ignition coil and muffler. water will not dissolve carbon; it is far too hard to be effected. Can also be used with hedge trimmer attachment HS 246. Admitted Woodaholic. Check for any cracks and damages and replace if necessary. Pour starting fluid into the carburetor and crank the engine several times. Confirm the spark plug gap, check and adjust with a feeler gauge or gaping tool. The chain oil will keep the chain lubricated, keep off dirt and allow smooth movement. 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. The ignition system is responsible for igniting the fuel and air mixture to produce energy that powers the chainsaw. Greenworks Commercial GS181 82V 18-inch Chainsaw: 50cc gas equivalent power with a stock 18-inch bar and chain ( starting at $349) It had a compression release, and it started and ran well. I hope you understand the problems why your chainsaw is hard to pull. No compression when pulling start rope. We're all about fixing small engines, from carburetor rebuilds, to crankshaft machining. 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. Stihl MS192T Chainsaw Fuel Oil Tank Engine Housing Assembly OEM. I've done it to high hour Kohler engines many times. The spark arrestor in a chainsaw traps exhaust products emitted from an internal combustion engine. Your email address will not be published. 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. If repeated cleaning does not fully unclog the carburetor, you will have to replace it. Carbon buildup is yet another important factor in the increasing compression experienced by chain saws over time. 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. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. Has someone invented a new kind of two stroke motor? This article will help you fix the most commonly reported problems of a Stihl chainsaw. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. You can use a ratchet to do the task. Chainsaws are very powerful tools, and if theyre not properly maintained, they can easily overcompress the chain, which can cause it to break. Why Does My Chainsaw Have Too Much Compression? Then Google "decarb". That is what was told to me by the area distributor technician Check for side play in the crankshaft. The owner is complaining of hard to pull start. If you suspect a compression issue, seek professional help as compression repairs can be complicated. Being new carb, wasn't looking that direction educate a non mechanic. Hold the tip of the blade and adjust the tension of the chain correctly. I agree the saw runs great, but when your helping old men with ideas of their own its hard to say I wish I had 190 pounds of compression.
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