stihl chainsaw has too much compression

By prescott valley 4th of july 2020 25 June 2022

Once started it runs great. Chain Tension Failure. If the saw has compression, the engine will make a whirring and chugging noise. Check summer/winter switch. When pulling the rope, always take out the slack and get the engine into the "almost compression" area, release the tension to let the rope wind back on the starter (the starting rope should be as short as the saw allows). I bought it used around 1978. One clutch shoe is missing the friction material and the av bushing on top needs replaced. Jun 2, 2015. When the rope is yanked from your hand, it's usually timing. For a practical matter, if you pull on the starting cord and the saw comes with it, you should have enough compression. Stihl chainsaw carburetors usually have three adjustment screws: one each for idle, low speed and high speed. The saw retails for around $409 as a bare tool and carries a 2-year commercial or 3-year residential warranty. Seems like a spark issue. Just took it out of its case and attempted to start, and found it almost impossible to pull the rope. Keep holding onto the unit while . Iowa. Why does my chainsaw have too much compression? I have a Husqvarna 440 and bud has the Echo CS 400. February 22, 2011. The Chain Dulling Fast. How much does a STIHL ms460 cost? dilute 20 ml of oil in 1 liter of fuel. The chainsaw has an oil reservoir which lubricates the chain in use. Move the selector lever up one position immediately or the saw will flood on the very next pull. If a chainsaw has a 2 stroke engine, then the maximum compression it requires is 110-130 PSI. As an example, in a mid-size saw, the MS261 has a compression release. On a Stihl 180 chainsaw, the piston group has a diameter of 38 mm. Many problems with compression are related to fuel. This ensures our chainsaws meet our standards in design and performance - standards that have made STIHL the clear choice for professionals and homeowners, making STIHL the #1 selling brand of chainsaws worldwide. read more Eric Noe Technician Stihl 251 chainsaw. Pull on the starter rope until the compression reading maxes out. The condition of the exhaust side of the piston will tell you if that is the cause. Saw has never been problematic - till now. Why does my chainsaw stall when I give it gas? A well-balanced compression holds the cable tightly with the engine. Leaking Gas. But being hard to pull sounds like light seizure problem. Pull the rope until it starts. Read more: STIHL 250 stalls when the throttle is depressed. The Stihl 066 chainsaw uses the same type of engine most gasoline-powered yard tools use, a two-cycle combustion engine. Explanations of the purpose and value of a compression release valve on a chainsaw, and some advice on starting a stubborn saw with less pull-back on the rope. Manual for my Stihl saws and leaf blower says to scrape carbon out of the exhaust port. It should be anywhere be at least 110 (according to stihl themselves) but some models vary. It's simple to check if you want to give it a try. Pull on the starter rope until the compression reading maxes out. Answer (1 of 4): As far as PSI with a compression gauge, that would be per factory specs. This may apply to other mid-range or pro chainsaws which have carburettor high and low mix and idle adjustments. Stihl MS-290 Chain Saw - Compression High Problem When I attempted to start my Stihl MS-290 Farm Boss Chainsaw, the compression seemed way too high. But being hard to pull sounds like light seizure problem. It did not start or run but it does pull over and recoil pretty good. (40 mm) Stroke: 1.1 in. Shop at Stihl USA. Back them off 1 complete turn (counter-clockwise) Screw (LA) - Turn (LA) Idle Speed screw until the chain stops. Compression problems. May need points cleaned new condenser or coil in my opinion. If the compression is too high or too low, the engine won't start. Using fuel with . Don't do anything special. A compression gauge works much like a tire gauge, reading the pressure inside the engine. Report to Moderator . When you're ready to use the chain saw, you'll need to remove the saw from its stand and set it down on a flat surface. Adjust this screw too rich and the chainsaw will blubber, too lean and it will over rev. If the start cord pulls out and the saw pretty much stays on the ground, you have a lac. My first chain saw was an old Homelite EZ with a blue metal case and a 20" bar. Now, for those who have a compression tester, simply take the spark plug out of your stihl chainsaw and connect the tester. The timing is fixed on these saws, but a seizure or sudden stop can cause the crank/flywheel key to shear. First make sure that the lead from the coil to the spark plug is properly secured. I can't offer much in the way of compression specs- though if I had to guess, I'd expect to see at least 120lbs. What does MS stand for on a Stihl chainsaw? If not, press it firmly back into position and try start your chainsaw. I have a couple of blowers that are about 70 to 80lbs. . Compression measured 75 psi with the new decomp valve pressed down. It has the same 20.3 ounces of fuel capacity as the 362 C-M and has the power of a Prius car because it's environmentally friendly. Saw will start but I can't keep it running. Been sitting for a good while. The top label is too faded to read, but all parts begin with 1122. Advice: Too much compression making it almost impossible to start. Shift the Master Control Switch To the Cold Start Position. Customer . Remove the gas cap and inspect the fuel filter; replace if clogged or dirty. Weighing 5.9 kg (dry, no bar, no chain) with a 2.8 kW power output from the 56cc engine, this mid-range chain saw should pack enough power to accomplish the various sawing tasks found on gardens, farms, plantations and orchards. Here is a stepwise guide to help you start a flooded Stihl chainsaw: 1. A hot engine that has been running for a long time will usually be higher than a cool chainsaw. It's simple to check if you want to give it a try. In other words, you need 25 ml of engine oil diluted in 1 liter of fuel. The compression gauge hooks up to the cylinder via the spark plug hole. It wanted to die at half speed and other times die randomly. I think that's what I'd do. #16. Owner of the latest Stihl MS660 I got into the shop said the saw ran OK. Right on the ragged edge thanks to the EPA. Stihl MS290 Engine Performance. Some individual engines may run a bit higher or lower and the temperature of the tool can affect readings. Old or bad fuel can cause lots of headaches with yard equipment. Been sitting for a good while. The decomp valve was broken, so I replaced that. All I got was a thump between pulls. Ask Your Own Small Engine Question. Using "winter gas" can boil in carb in summer, causing same problem. How much compression should a Stihl MS460 have? Carburetor Adjustment An engine stalls when it's getting too much or not enough fuel from the carburetor. It had a compression release, and it started and ran well. Stihl chain saw too much compression I had to take it apart My Stihl 290 chain saw cord pulls back real hard while My Stihl 290 chain saw cord pulls back real hard while trying to start it. Replace only if necessary. When compression is too low, you may experience decreased power or complete shutdown because the engine isn't able to hold enough pressure in the cylinder to run efficiently. It is possible that your garage tested the saw with a tester for cars allowing the engine to be continuously cranked. Stihl MS 211 Chainsaw Specs Stihl MS 211 Specifications Carburetor. While holding the unit, press down on the throttle trigger with your first hand and pull through with a swift jerk of the arm. Leaving in winter mode can cause gas to boil in carb. Aug 23, 2009. Little two stroke motors as on chainsaws have to have a lot of compression to make the needed power. Of those, we really like the Stihl MSA 220 C-B for its excellent power and runtime (over 40 minutes with an AP 300 S battery). I have the same problem with my Stihl 032. Pull on the starter cord 10 to 15 times, or until the compression gauge needle hits its maximum level. If it were my chain saw I would drain out all gas and buy new gas and new oil mix if I had confidence in the spark being there. (28 mm) Idle speed: 2,800 rpm Maximum permissible speed with . The timing is fixed on these saws, but a seizure or sudden stop can cause the crank/flywheel key to shear. You will notice the compression less. Generally the minimum is 110 lbs. Then choke off and and it should start within 2-3 pulls. You should achieve 130 to 160 psi to have a optimal performing unit. The common part, MS, stands for Motorsge which is German for chainsaw. Then turn counter-clockwise one quarter of a turn. how much compression should my chainsaw have? If the saw fails to start, it is probably flooded with fuel. Blup throttle to bring it down to idle. Click to see full answer. (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 How much compression should a chainsaw have to run? The MS 391 is a strong saw that can cut down big trees. Stihl MS 271 Construction Design. 2. Old or bad fuel can cause lots of . Chainsaw Frequently Asked Questions Note: STIHL recommends use of fuel with no more than 10% ethanol content. No extra oil, don't run it rich and no babying. Here is an example of a chainsaw compression release. You never try to get it to run with the choke on. It did not start or run but it does pull over and recoil pretty good. Carb is clean. It has been removed and the hole plugged. Also check the coil you have fitted is the one with a number of levels of ignition timing - early 066/064 would kickback badly because the ignition had fixed one position timing, later ones had built in retarded ignition on starting that then advance over 3krpm and then retarded again at near max revs - the part the newer MS660 should have is . If your Husqvarna chain saw has more than 2 liters of power. To start your blower: Connect the red starter cord to the 'S' on the body. Replace carburetor with Zama Carb: C1Q-S119 (MS211 and MS211 Z), C1Q-S120 (MS211 C). According to Stihl USA, the minimum compression reading for their chainsaws should be around 110 psi. Allow your chainsaw to sit for 15-20 minutes to allow the fuel to evaporate from the blades. When you pull the boot off the top of the spark plug, you should hear a popping sound. Mechanic told me he would check it out and let me know whats up. jeremy fountainthemowermedic1mail and business inquires themowermedic1@gmail.comhttps://www.youtube.com/themowermedic1https://www.facebook.com/themowermed. Chainsaw has too much compression in reply to D beatty, 08-17-2017 22:23:08 That is the nature of a 250. One clutch shoe is missing the friction material and the av bushing on top needs replaced. The newer professional Stihl saws have a compression release. Pull the starter rope a. Stihl chainsaws and (hand held) leaf blowers, I was told that 100lb is the minimum. Air filter cover won't stay on. Rotate it to 90 degrees to the left, then wash the air filter. Posted by; in blog; Tagged with; Lighten Hair With Baking Soda And Shampoo, How To Empty Dyson Vacuum V7, Cabal Ritual From The Vault, Legend Of The Phoenix Storyline Ending, What Is An Ionic Solid Apex, Chris Rock Skeet, Bridgerton Reg-jean Page Net Worth, It had a compression release, and it started and ran well. Bad tank breather. plug and see if the engine turns freely without the spark plug period that will let us know if there's an issue with too much compression. When the rope is yanked from your hand, it's usually timing. How much compression should a Stihl MS460 have? About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators . I am having a starting problem with a Stihl 032AV chainsaw. It has the compression release, so I will give it a try and see how . Pulled the Description of the piston group Stihl 180 chainsaw. A simple way to check for low compression is to place the chainsaw on the ground and . What is the minimum compression for my STIHL chainsaw? Chainsaw Running Roughly. As standard, the MS 180 CPG comes complete with a piston pin, two piston rings, and two retainer rings. Pull the starter cord a good five times and read the pressure. Replace if old or too dirty to clean. May need points cleaned new condenser or coil in my opinion. Many problems with compression are related to fuel. It has a closing force of 4N +/-. Since it starts fine cold, I'd be checking the following: 1. According to Stihl USA, the minimum compression reading for their chainsaws should be around 110 psi. The minimum compression reading for chainsaws should be in the range of 112 to 112. It has not been used in almost a year. All went well with the build and it was a load of fun. Air filter cover won't stay on. The most likely candidate would be failing/worn piston rings, but it could also be problems with the intake or exhaust valves or their valve seats, the threaded fitting that the spark plug (and likely the compression test fitting) screws into, or even a crack in the head of the pistons. It would not run consistently. I bought it used around 1978. Stihl 031 AV Chainsaw. There are countless causes of poor chainsaw compressions but the most common ones include: A flooded carburetor or a broken crankshaft seal. the 455) have CR, but he Stihl Farm Boss (MS290) does not. Chainsaw Compression Release. But it was stolen along with other tools around 1990. The ideal pressure range of the Stihl chainsaw is between 90 and 110 psi. Compression gauges are not always accurate and different engines will provide different results. Open and re-close gas cap, to normalize tank pressure, then try to start. Click to see full answer Hereof, why does my chainsaw have too much compression? When it was put away last fall, it started easily and ran well. Stihl ms170 chainsaw will not start. ., To dilute gasoline for a Husqvarna chainsaw you must use the ratio 1:50, i.e. Some individual engines may run a bit higher or lower and the temperature of the tool can affect readings. Mix up a batch of fresh fuel and let 'er rip! 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. Pull trigger and set full choke. Take off the air filter cover and air filter again. Lift the chainsaw from the ground using the starter rope handle. 4 Height. The compression gauge hooks up to the cylinder via the spark plug hole. My first chain saw was an old Homelite EZ with a blue metal case and a 20" bar. Give it a few tries at pulling the starter before you give in assuming something is wrong with the saw. I removed the spark plug and it . I built a clone Stihl saw ms660. I just bought an 075AV and it was delivered without a compression release. In a larger displacement engine the port doesn't release compression fast enough and the closing force is achieved earlier and potentially before the ignition event. Most chainsaws will operate well with compression readings that range from 100 to 160 psi. If this does not solve the problem, it may be related to excessive fuel caused by problems in the gas lines and filters.The lines run from the tank to the carburetor and back again. 2, There's probably too much 2-stroke oil in the petrol. Squeeze the throttle to full on and pull the cord several times. Most chainsaws will operate well with compression readings that range from 100 to 160 psi. Dont use either all that much so its nit picking.. According to Stihl USA, the minimum compression reading for their chainsaws should be around 110 psi. 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. Back to top derwen1959 Long Time User it has fresh gas and bar oil. it has - Answered by a verified Technician . Remember to top up the oil reservoir after each use with proper chainsaw oil. Lean = hot = mechnical damage, possible seizure and low compression. Pull the starter rope until you hear the first sign of it firing with a small burp. 2. A bigger chainsaw engine will have a greater starter cord tension that will require more effort. 3 Closing Force. The trimmer is about 4 years old. These engines create vacuum pressure that sucks fuel into the engine . It has not been used in almost a year. What causes too much compression in an engine? As others have said, 70psi isn't enough to support combustion. Stihl 028 AVS bogging down under load - carburettor tuning [] Not having previously owned a 'pro' type chainsaw I was unaware of the importance of careful carburettor adjustments and how dramatically this could affect the performance of the saw, such as 'bogging down' under load and . Carbon build-up can result from too much oil in the gasoline [mixed rich] or from using fuel of poor quality [fuel that has become stale]. However, this will vary by model and compression readings alone are not enough to determine the condition of the engine. Just wanna get a 2nd opinion. of compression. STIHL MS 391 REVIEW. But don't wanna put any money into them if there's not enough compression. I took my Stihl fs 80 weedeater into the shop about 2 weeks ago. STIHL single cylinder two-stroke engine Displacement: 2.15 cu. I fixed and checked several other things as requested but not much related to the engine. It also has the ability to accommodate either a 14 or 16 bar. Need the oem nut I believe. Thinking I has a serious problem, I pulled the sparkplug and it pulled fine. Mar 20, 2007. Similarly a 4 stroke engine needs 2 times more compression than the 2 stroke engine that is around 180-210 PSI. Once spark plug is put in and the saw has compression the saw will not crank. Hi, 1. Compression is generated by the engine via the crankcase and the combustion chamber. Basically the same saws I like the compression release on the 440 and tool less bar chain adjust, and it starts every time I've needed it. The Chain Saw Is Not Cutting. The Chain Does Not Oil. [Log in to Reply] D beatty 08-17-2017 22:23:08. MS211 Engine. Echo is a tad lighter tad more compact just seems easier to handle. Unscrew the spark plug using a ratchet and screw the compression gauge in its place. That is what was told to me by the area distributor . This will change the timing and cause the ~SNAP~ problem. Once the saw gives some hint that it wants to start, move it to the next throttle position. Carb is clean. Even local authorities might find the MS290 useful for light maintenance work. My advice on ring seating. 4. If it fails to start, you'll need to check the spark plug. Motorsge Every STIHL chainsaw model name starts with MS, MSA, or MSE. My Stihl 290 chain saw cord pulls back real hard while trying to start it. Check and see if you have any water in the gas. on each additonal pull the saw cranks less until it nearly locks up Kinda falls on its face. The Stihl MS 290 FARM BOSS compression release will need to be replaced if it is broken or has significant carbon build-up. . You can do a quick check on the compression level of your chainsaw also. As such, believe this to be a Stihl 066 chainsaw. When starting, slowly pull the rope to where it pulls hard before starting your actual starting pull. A dirty air filter or a faulty ignition coil An excessively loose chain tension, oil leaking from the bar, and a worn-out spark plug are other common causes of poor chainsaw compressions It's supposed to warm up later this week so I'll be able to do some more on this chain saw. Seems like a spark issue. Question. The dimension of the CPG of the chainsaw is determined by the diameter of the piston, the cylinder is slightly larger. But lowly homeowner Husqvarna Ranchers (e.g. Oct 7, 2019. Saw will start but I can't keep it running. Shift the master control switch to the cold start position and remove the carburetor cover. The common part, MS, stands for Motorsge which is German for chainsaw. Stihl 031 av cranks and pull rope extends fully when spark plug is removed. 3. Sometimes an adapter is needed to make a tight fit between the gauge and the chainsaw. Only show this user. The following have been addressed. Motorsge Every STIHL chainsaw model name starts with MS, MSA, or MSE. Compression seems to be good and I've included a photo of the piston (looks clean; don't see any scoring or lines). It's not a problem, better too much than too little. The ideal pressure range of the Stihl chainsaw is between . Stihl chainsaws are equipped with an Easy2Start system that reduces cord tension for this very reason. It's supposed to warm up later this week so I'll be able to do some more on this chain saw. Pull rope comes out about 6 inches on the first pull and stops. What does MS stand for on a Stihl chainsaw? How much does a STIHL ms460 cost? 4. The top label is too faded to read, but all parts begin with 1122. You should achieve 130 to 160 psi to have a optimal performing unit. A cool chainsaw runs low, while a hot engine that's been running for awhile will usually be higher. #1. Kinda falls on its face. On most saws this will result in a fast idle once starting is achieved. Using it a lot will cause sawdust to stick to that oil. Get rid of as much debris from the air filter's screen as you can. A compression gauge works much like a tire gauge, reading the pressure inside the engine. Need the oem nut I believe. But when I did it's first start it was so stiff with the plug in, that I need to use both hands and have my foot on top of the body. This will change the timing and cause the ~SNAP~ problem. When this rope pulls out a little bit of slower, provably, the engine of this chainsaw has low compression. Carboned rings will decrease not increase compression. Now how much compression does the engine of a chainsaw needs depend upon the capacity of its motor and temperature. If the compression is too high or too low, the engine won't start. The temperature of the tool can affect the readings on the engines. As such, believe this to be a Stihl 066 chainsaw. Our aftermarket suitable replacement Stihl MS 290 FARM BOSS chainsaw compression . Screws (H) & (L) - Turn the adjustment Screws (H) & (L) down onto their seats (clockwise). The Chain Saw Won't Start. It's better than other models when compared to them and is one of Stihl's best chainsaws ever made. Only show this user. Compression should reach at least 90 PSI if it's hot, and at least 100 PSI if it's cold. kwschumm Join Date: Feb 2003 Posts: 5764 NW Oregon Pics: . Yes, some of the mid-size pro Stihls have compression release valves, and all of their big saws have it now. Note the size of the throttling port. (35.2 cm3) Bore: 1.7 in. It's quite possible 20 hrs on a consumer saw could be toast if it was set too lean, as most are from the factory. Turn it on and press down on the safety lock with your other hand while pulling on the starter cord. in. Check gas. You need something like a gunson hi gauge with the very soft tip mounted Schrader valve. 1. saw has new carb 2. flywheel has been removed and key inspected. Compression seems to be good and I've included a photo of the piston (looks clean; don't see any scoring or lines). how to fix stihl chainsaw hard to pull start. You'll want to make sure that the blade is level and that it's centered on the surface of the workpiece. Stihl 031 AV Chainsaw. It is a newly-developed problem; it was pulling OK, then started breaking the pull rope, but was occasionally difficult to pull once or twice, then pulled OK. After last repair of pull rope, it is now VERY difficult to pull, as though it has WAY too much compression. But it was stolen along with other tools around 1990. Common Stihl Ms 271 Chainsaw Problems.