stihl chainsaw too much compression

Press J to jump to the feed. TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. I;ve read somewhere to put water? Any help out thereEGBinOR Get you some Sea Foam at the local auto parts store. If it is not physically damaged, clean it with clean gasoline and a rag. It has barley been used, no carbon in muffler, still happens with muffler off, does not happen with sparkplug out. Check the chain tension and adjust it if it is too loose or tight. i have a ms 250. That is the nature of a 250. Im Nelson, a DIY enthusiast with a bottomless can-do attitude. Below are the reasons the chain keeps coming loose and how to fix it. Take off the muffler or the carb to get access. "publisher": { Don't put water into the 2 stroke. Obviously, the motor, which has a huge capacity, will require more compression. As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. You can also quickly fix this anomaly by ensuring a proper troubleshooting of the pulley compartment to find damages. So, in our suggestion, one of the first things to check while feeling high compression is the starter spring. Stihl recommends using 89 octane gasoline without ethanol, and the gas should not contain more than 10% ethanol. Then, use a wire brush to remove all the carbon build-up from the cylinder and piston. If you suspect a compression issue, seek professional help as compression repairs can be complicated. That would have to be some puddle of oil for a MS250 to have a "bar oil leaking in and causing high compression problems" What kind of Stihl oil regular or synthitc, had an 025 years ago that was a real knuckel buster never checked compression but was using regular Stihl oil. Now it has sat since the last use and I went to start it and it turned over maybe three times and the compression . Every chainsaw engine has a different capacity depending upon its motor power. I missed the "no carbon". I hook up a drill to the nut on the clutch and start hard starting saws that way . If I drop start it I can pull it through 1 compression stroke. Check if the wires are damaged or broken and replace them if necessary. However, this will vary by model and compression readings alone are not enough to determine the condition of the engine. Confirm the spark plug gap, check and adjust with a feeler gauge or gaping tool. 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. After initial pull on rope (which feels like vapor lock on cylinder), saw will start on second or third pull. 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! As stated it is with a hot engine so the water turns into steam in the cylinder and helps bust up the carbon. 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. "mainEntityOfPage": { Mar 24, 2019. Help, can't pull start Stihl MS250 chainsaw, too much compression. The chain clutch might be, Read More Cordless Chainsaw Wont StartContinue, The most common reason is simply the wrong battery. It will be apparent if it is, but usually a scored saw won't run good, if at all. Move the selector lever up one position immediately or the saw will flood on the very next pull. "author": { Soaking in water will do nothing but rust things up . I'm an arborist by profession & a blogger by passion. Would have to remove spark plug and rinse cylinder with gas to be able to start. If it is the right sparkplug and not flooded, I would maybe buy a different saw with easy start. Check the tension 2. Spark plugs that are not functioning properly are another probable cause of excessive compression. An excessive amount of compression in your chainsaws starting rope could also be indicated by the beginning rope failing to draw. Make sure it fits snug. Wipe off lubricant and grime from the bar with a clean rag. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. I pulled them over with plug out ,They seemed to pull normal and believe they were fuel locked. Loosen the nuts and bolts clockwise and then pull out the oil pump gently. Stihl ms 291 ? Here's How to Fix It Quickly NelsGarage will share the knowledge Ive gathered about different tools and give you tips to accomplish your DIY projects faster. Currently I live in Austin, United States. 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 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. Remove the air filter, wash it with detergent and water and scrub off the dirt with a brush. 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. It runs good after I get it started. Press question mark to learn the rest of the keyboard shortcuts. An example of data being processed may be a unique identifier stored in a cookie. 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. Loosen the nuts holding the clutch cover and disconnect the chain shroud and remove the oil plate. The saw runs and starts great. Back to top derwen1959 Long Time User To inspect the guide bar, disassemble the chain cover, chain and bar. You can check the compression by pulling the spark plug out and holding it in your hand. Stihl 024 - Sherlock Holmes issue - help needed here. "dateModified": "2017-08-17", "@type": "Organization", Would not be afraid to do it to a 4, 6, or V-8. Has someone invented a new kind of two stroke motor? 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. Wipe off any flammable fluid from the metal surface of the engine with a clean rag. 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. 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. 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. How Much Compression Should a Chainsaw Have. Why Is My Chainsaw Hard to Pull? (5 Things to Check) You can check the compression by pulling the spark plug out and holding it in your hand. My one and only MS250 was a kicker to start it but that was the only problem. If the compression is not produced in the engine at an appropriate level, it will not be able to convert fuel into energy. or Best Offer. That is what was told to me by the area distributor technician That is the nature of a 250. This can lead to serious injuries, including cuts and amputations. Thank you for the responses. Maybe take the plug out & pull the cord several times to blow out any excess fuel, then see how it pulls. If not I'm honestly kinda stumped. link to Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. Consequently, operating this chainsaw becomes a really difficult chore to do. Therefore, it does not need any compression rate to start. I hook up a drill to the nut on the clutch and start hard starting saws that way . 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. Carboned rings will decrease not increase compression. If you notice the treads are worn, which prevents the device from pumping, replace it with a new one. It was easier to pull after I cleaned it up, but still tough. You are using an out of date browser. Replace the fuel filters instead of cleaning them as they are pretty affordable and easy to install too. Keep in mind that the stuck ignition rope can also damaged other parts inside the starter assembly. Use recommedend chain oil lubricant. How To Fix Chainsaw Battery Charger Blinking Red? Most fuels nowadays are a blend of ethanol which attracts moisture and speeds up the rotting process. This Indoor Fly Traps: 5 Things You Didn't Know About Indoor Fly Traps. Normally it's not a problem but if it was already difficult to pull it could be. Why Does My Chainsaw Have Too Much Compression? Pour starting fluid into the carburetor and crank the engine several times. The choke position is the fourth setting on the master control lever. I get it going now and its easier but its still a bear. How Much Compression Should A Chainsaw Have? - Kyle's Garage "@type": "ImageObject", Unscrew the spark plug wrench using a spark plug from the engine. Repair or replace the damaged part 2. Your email address will not be published. The carburetors work in a chainsaw engine allows the right amount of fuel and air mixture into the combustion chamber. The ignition system is responsible for igniting the fuel and air mixture to produce energy that powers the chainsaw. Stihl ms 291 hard to pull start? Here's How to Fix It Quickly When you are doing a cold start, push the choke lever to the warm start when the engine starts to run. 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. Stihl MS192T Chainsaw Fuel Oil Tank Engine Housing Assembly OEM. If it does maybe it is plugged. Required fields are marked *. Winterize Your Pool Like a Pro: A Comprehensive Guide for Home owners. The exhaust side of the piston is a warm gold. The ideal pressure range of the Stihl chainsaw is between 90 and 110 psi. . I used to have a Homelite that would do that if I left gas in it. If you introduce an extremely fine trickle of water into a running engine through the carburettor that may remove some carbon . Then Google decarb . What Causes Too Much Compression on Poulan Chain Saws?