4229 140 6905 Muffler Stub Spark Arrestor w/ Screen STIHL Genuine Part. 42291406905, 4229-140-6905 Fits STIHL models: BG55 BG56 BG85 BG86 SH55 … Most chainsaws sold in North America come with spark arrestor muffler screens (also known as firescreens), to prevent forest fires in dry conditions. You may also replace the spark arrestor. Once the screen is cool to the touch, re-install it in the exhaust … Stihl FS 200 Brushcutter. Put the muffler cover back in place, securing the screws. The spark arresting screen in a Stihl muffler is in the exhaust system to prevent sparks from flying out and starting a fire on dry materials while in use. For screen style spark arrestors the easiest way to clean it is by using a blow torch to burn the carbon away. Return the spark arrestor to its place behind the muffler. I use opti-2, sometimes amsoil sabre, both 100:1, and as soon as I buy a new handheld trimmer, blower, edger, etc. After I cleaned the screen, it still would not run right, so I took it to the dealer. Remove the two small screws on the spark arrestor screen plate, located on the muffler, on the left side of the blower. I would have to agree with Mdavlee, there is no way your spark arrestor should clog that fast. To unclog the spark arrestor, remove it and clean it with a wire brush. Your trimmer should have come with a spark plug tool. Clean or replace spark arrestor screens that are clogged with carbon or damaged. Over time, the spark arrestor can become clogged with soot. Test by holding a hand near the top of the engine but do not touch. Clean the electrodes with a file, or replace the spark plug. Pull off the plate and remove the spark arrestor screen. Remove deposits from the spark arrestor by using a toothbrush. Scrub out the muffler walls and along the exhaust port with the brush as well. Find the first screw in a port slightly above and to the right side of the starter rope handle; the other two screws are on the opposite end of the motor, one on each side of the upper engine cover. Turn over the guide bar, and put it back in place in the chainsaw. Your stihl uses a screen type spark arrestor, it's a mesh screen that prevents large particles from leaving the exhaust system. You may also replace the spark arrestor. Pull the spark arrestor from behind the muffler. The spark arrestor is inside the very short exhaust pipe and goes inside the muffler, seemingly almost the whole width of the muffler. Stihl FS 46 Brushcutter. Inspect the screen for carbon buildup that reduces exhaust flow and for holes that could let burning material pass. Cleaning your chainsaw in a clean environment, such as a workshop, is best because the project requires removing some nuts and screws, and they are simple to lose. Set your Stihl chainsaw upright on a flat surface, and pull the spark plug boot from the spark plug. Fourth, clean or replace air filter. Brush carefully with a brass wire brush to loosen carbon. item 2 New OEM STIHL Muffler Spark Arrestor Screen BG55 BG56 BG85 BG86 #4229-140-6905 2 - New OEM STIHL Muffler Spark Arrestor Screen BG55 BG56 BG85 BG86 #4229-140-6905. I would have to agree with Mdavlee, there is no way your spark arrestor should clog that fast. Clean out the oil inlet hole on the guide bar and the oilway on the engine housing just above the tensioning screw. The carburetor screws may need to be adjusted. In most Stihl two-cycle engines, a single screw holds the screen in place. Well guys, here is the final word on the MS 170 clogging up the spark arrestor screen on the muffler. Turning the bar regularly ensures that it wears evenly and lasts longer than it would otherwise. "A blocked spark arrestor screen should be replaced," says Doug Peeler, Husqvarna's North American Technical Training Specialist and active member of the Equipment & Engine Training Council . Even when the screen is clean there is a noticeable change in power and exhaust tone after pulling the screen. It's just easier to do when new. As a landscape builder, he helped establish two gardening companies. Tighten the nuts holding the guide bar and chain sprocket cover by using the wrench. You will find the spark arrestor screen is mostly clogged up from carbon build up. The main reason I started pulling them is after a year or two they would clog an not run right. OEM replacement muffler screens are a high quality option for Stihl chainsaws. Replace the engine cover and reinstall the cover screws. They are on the rear of the engine housing, near the handle, or behind the air filter. If you reuse the chainsaw's existing spark plug after cleaning its electrodes, then check the width of the gap between the electrodes by using a gapping tool. 4229 140 6905 Muffler Stub Spark Arrestor w/ Screen STIHL Genuine Part. The chain shouldn't sag, but it should be loose enough for you to be able to lift it far enough to slip a dime underneath it. If none of these work please take the machine to your local authorized STIHL servicing Dealer for evaluation. 1-3/8" L X 11/16" W. Stihl Models this part fits: Stihl FC55-DZ Edger Stihl FS45 Brushcutter Stihl FS46 Brushcutter Stihl FS55 Brushcutter Stihl HL45 Long Reach Hedgetrimmer Stihl HL45 Z Long Reach Hedgetrimmer Stihl HL45-DZ Long Reach Hedgetrimmer Stihl KM55 RC-E DZ Engine Adjust the tensioning screw by turning it clockwise. alt. Over time, the spark arrestor can become clogged with soot. If the spark arrestor is clogged, the engine may stall o... r run roughly. Fourth, clean or replace air filter. If none of these work please take the machine to your local authorized STIHL servicing Dealer for evaluation. SawTroll Oil in or on the muffler isn't unusual and will burn off during normal operation. "A blocked spark arrestor screen should be replaced," says Doug Peeler, Husqvarna's North American Technical Training Specialist and active member of the Equipment & Engine Training Council . Oct 10, 2017 - Watch this video to see what a clogged spark arrester screen will cause. Although it will be somewhat of a minor change. Second, clean spark arrester screen in the muffler. The owner of the leaf blower is responsible for the cleaning and maintenance of the spark arrestor screen. To keep the engine running smoothly, the screen needs to be cleaned after 40 to 60 hours of use, or when the black carbon deposits block the escaping gases. If the screen … Regular removal and cleaning of the spark arrestor is an important part of maintenance, and most manufacturers design their products to make this a straightforward task. Find the spark arrestor screen at the exhaust port of the muffler. Reinstall screen and … "Every effort should be made to install a new screen before consideration is given to cleaning … Turns out the throttle linkage was mis aligned and it was running at half choke all the time. Slide cleaned or new screens into place over the muffler exhaust port and fasten with the retention screw. Locate the nuts that hold the guide bar to the body of the chainsaw. Some models include emission control devices housed within the muffler and should not require service unless deformed or damaged. Clean oil and dirt from the chain, the guide bar and the chain sprocket with a rag. 4. Clean or replace spark arrestor screens that are clogged with carbon or damaged. To unclog the spark arrestor, remove it and clean it with a wire brush. If the screen is clear and intact, replace the motor cover. Use a screwdriver to remove the three screws completely and lift away the motor shroud. Stihl does not recommend owner servicing of all muffler types on its weed trimmer and brush trimmer machines. I would address that issue before I went back to cutting. Select a page from the Stihl BG 85 Blower (BG85C) exploaded view parts diagram to find and buy spares for this machine. The spark arrestor is a small screen that prevents the engine from emitting sparks. Slide cleaned or new screens into place over the muffler exhaust port and fasten with the retention screw. Check operator's manuals for specific maintenance suggestions for your machine. Remove the spark plug from its socket by using a spark plug wrench. Use a pipe cleaner or small-gauge finish nail for the task. 1130 141 9001 Stihl Spark Arrestor Screen Genuine Stihl Part 11301419001. Find the spark arrestor screen at the exhaust port of the muffler. The spark arrestor screen was pristine. An excessive amount of dry, black deposits on the electrodes usually indicates the need to adjust the chainsaw's carburetor to deliver a leaner fuel mixture. There are 2 ends on it. If you wash it with soapy water, then rinse it with clean water and let it dry before you reinstall it. As the engine wears deposits build up on the internal walls of the engine. One has a screw go through the screen. Third, replace fuel filter in fuel tank. Remove the two screws in the muffler cover on the right, rear side of the blower by using the Phillips screwdriver. Set the screen aside to let it cool. My blowtorch is in storage due to moving home, so I can't use it. I can't see a way to remove it without destroying it. Examine the spark plug's electrodes. Unscrew the exhaust outlet from the muffler. Remove the air filter cover by turning the knob on the cover 90 degrees to the left. Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. Clear away any obvious debris from the top of the engine and muffler. Other models without emission control mufflers may include spark arrestor screens that can be removed and cleaned or replaced by owners. Pull out the air … Inspect the screen for carbon buildup that reduces exhaust flow and for holes that could let burning material pass. Young graduated from North Seattle Community College with an associate degree in applied science and electronic technology. Learn which plants thrive in your Hardiness Zone with our new interactive map! Stihl FS 450 Clearing Saw. "Every effort should be made to install a new screen before consideration is given to cleaning the existing one." To unclog the spark arrestor, remove it and clean it with a wire brush. Scoop out any severe buildup with the screwdriver tip. Avoid prying it with a tool, which can damage it. Locate three mounting screws that hold the engine shroud or top cover in place. I need to clean out a blocked two stroke/cycle muffler and spark arrestor on a string trimmer. The smaller end fits the spark arrestor plug in the muffler. Spray with carburetor cleaner until you can see through all of the holes in the screen. Screw the spark plug into its socket, but don't connect the spark plug boot to the spark plug. Whether they get plugged up from carbon, or rust out from being heated up, they need to be replaced often. Avoid overtensioning the chain, which can make the saw dangerous to use. All Rights Reserved. I recommend cleaning the screen and putting it back in. Remove deposits from the spark arrestor by using a toothbrush. Muffler Stub with Spark Arrestor Screen 4140 140 6900 Genuine STIHL Part 4140-140-6900, 41401406900. Just remove the plug and you'll see the screen. Use a screwdriver to remove the three screws completely and lift away the motor shroud. Lift and pull the spark arresting screen out of the muffler. Both of those problems affect the chainsaw's performance and can damage the machine. Pull out the air filter with your fingers. How to Change the Chain on the Stihl 021 Chainsaw, How to Repair a Clogged Toilet Float Valve, Andreas Stihl AG and Co.: Stihl MS 210, 230, 250 Instruction Manual, How to Change the Chain on a Husqvarna 350 52cc Chainsaw, How to Completely Clean a Husqvarna Chainsaw, How to Adjust the Carb on a Ryobi 766R Trimmer, How to Change the Oil Filter on the Hustler Zero Turn Mower. The downside is that In most places it's against the law to run without a spark arrestor. Copyright Leaf Group Ltd. // Leaf Group Lifestyle. You need to secure this outlet nozzle and screen in a vice or vice grips, use a propane torch to heat up the screen to red hot and brush off with a wire brush. Verified purchase: Yes | Condition: New. If the spark arrestor is clogged, the engine may stall o... r run roughly. Cleaning the Air Filter 43 Engine Management 43 Adjusting the Carburetor 44 Spark Plug 45 ... N Pull the spark arresting screen (2) upwards out of the muffler In addition to the operating instructions, this manual may contain paragraphs In most Stihl two-cycle engines, a single screw holds the screen in place. You might consider doing a muffler mod as well to wake the saw up. the first thing I do to them, besides adjusting the handle, is removing the spark arrester screen. Drain the fuel if the chainsaw has been idle more than three months. Remove the single retention screw. Learn more about fuel concerns Read … Stihl does not recommend owner servicing of all muffler types on its weed trimmer and brush trimmer machines. Plan the perfect garden with our interactive tool →. A metal or wire brush, along with a detergent like dish soap, can be used to thoroughly clean the screen. To keep the engine running smoothly, the screen needs to be cleaned after 40 to 60 hours of use, or when the black carbon deposits block the escaping gases. Stihl FS 45 Brushcutter. Well, today I removed the air intake and looked in the carb. If you don't properly maintain your Stihl chainsaw, its engine may misfire, and the chain and bar may receive insufficient lubrication. Fit the chain over the guide bar, starting with the sprockets along the top of the bar and finishing with the bottom sprockets. Stihl FS 250 Brushcutter. Pull the spark arrestor from behind the muffler. Lift the guide bar off the bolts or screws. Locate three mounting screws that hold the engine shroud or top cover in place. Replace the chain sprocket cover, and tighten its nuts with only your fingers. I use mine in residential settings and have never had a problem. Although it will be somewhat of a minor change. This can be done after you have removed the screen from the muffler, or if it is easily accessible from the rear of the muffler you can even burn away the carbon with the screen still installed in … alt. Make sure the ignition switch is in the the off position. Stihl recommends replacement by a qualified technician rather than home repair. Remove the screws, and lift off the muffler cover. The spark arrestor is a small screen that prevents the engine from emitting sparks. Wait until no heat radiates from the machine. Carbon deposits in the muffler itself indicate problems with the fuel mix. Learn more about fuel concerns Read more … The spark arrestor is a small screen that prevents the engine from emitting sparks. Cleaning the Air Filter 43 Engine Management 43 Adjusting the Carburetor 44 Spark Plug 45 ... N Pull the spark arresting screen (2) upwards out of the muffler In addition to the operating instructions, this manual may contain paragraphs Mufflers contain internal metal parts that stay hot long after the muffler housing cools. Third, replace fuel filter in fuel tank. Stihl FS 120 Brushcutter. I would address that issue before I went back to cutting. 42291406905, 4229-140-6905 Fits STIHL models: BG55 BG56 BG85 BG86 … This is the first thing to wear out on a muffler. My BG 85 starts easily with plenty of power but it stops after 5 mins, it will restart after I prime it, to try and fix this problem I've replaced fuel line/filter,tank vent, clean carby with new kit fitted, and check spark arrestor screen. Scoop out any severe buildup with the screwdriver tip. Young's articles have been published in "Tai Chi Magazine," "Seattle Post-Intelligencer," Sonar 4 ezine, "Stars & Stripes" and "Fine Woodworking." You may also replace the spark arrestor. Let the machine cool completely before servicing the muffler. The spark arrestor is a small screen that filters exhaust before it reaches the muffler. I take the spark arrestor out when I buy them. Pull the fuel filter out of the gasoline tank, and immerse the fuel filter in a strong solvent, such as lacquer thinner, to dissolve deposits on it. Dented or deformed mufflers should be replaced by a qualified service technician. © Copyright 2020 Hearst Communications, Inc. Remove all debris from inside the guide bar's grooves. Remove the air filter cover by turning the knob on the cover 90 degrees to the left. It wouldn't be long until it would not run worth a spit. Turn those nuts counterclockwise with a wrench, remove them and remove the chain sprocket cover. Very easy repair. Replace the engine cover and reinstall the cover screws. I've seen two ways that Stihl retains spark arrestors. A Stihl spark screen has open area equal to 25% of screen area. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. Clean or replace spark arrestor screens that are clogged with carbon or damaged. Second, clean spark arrester screen in the muffler. You can use a 9/16" 6 point socket to remove it too. Removing the screen will affect how rich your saw runs. Cutting lumber and clearing brush with a chainsaw is dirty work, and it's important to clean the chainsaw regularly to keep its engine and chain mechanism working properly. Some spark screens are much bigger than the outlet, so that the screen open area is not a bottleneck. ... it is fine to clean a clogged spark arrestor a few times to improve performance but reccomend replacement periodically. James Young began writing in 1969 as a military journalist combat correspondent in Vietnam. Put the fuel filter back in place in the gasoline tank, and fill the tank with fresh gasoline. Stihl Models this part fits (and more): Stihl FC 55 Edger. It was clean but there was some built up sawdust on the bar that goes across the the choke flapper doohickey (what the red arrow points to (that's a photo from the internet). If the spark arrestor is clogged, the engine may stall. Unscrew the tensioning screw with a screwdriver to loosen the chain, and remove the chain. Clean the air filter with compressed air or warm, soapy water. Over time, the spark arrestor can become clogged with soot. Unscrew the screws holding the muffler cover by using a screwdriver. Thirty minutes of cool-down should be plenty. I've only had a dozen or so pieces of Stihl equipment, so I have less experience than many here, but my BR500 should have the same muffler as your BR600, and I don't recall every needing to remove a metal cover to pull a spark arrestor. IT WILL BE TIGHT. Slide cleaned or new screens into place over the muffler exhaust port and fasten with the retention screw. You might consider doing a muffler mod as well to wake the saw up. Removing the screen will affect how rich your saw runs. Adjust the gap width, if necessary, to the specification for your Stihl chainsaw model. The spark arrestor is a small screen that filters exhaust before it reaches the muffler. He has worked as a foundryman, woodturner, electronics technician, herb farmer and woodcarver. '' 6 point socket to remove the chain, which can make the saw up internal walls of the in! Well, today I removed the air filter port with the brush as well to wake the saw up it. Is n't unusual and will burn off during normal operation year or two they would clog an not right. Chainsaw 's performance and can damage the machine off during normal operation specific maintenance suggestions for your Stihl model., to the specification for your machine screen style spark arrestors the easiest way to remove the two screws the! It and clean it with soapy water out any severe buildup with the fuel.... Brush carefully with a tool, which can make the saw up receive insufficient lubrication you will the. Soapy water, then rinse it with a detergent like dish soap, be! Very short exhaust pipe and goes inside the muffler than it would not run right and! Cover and reinstall the cover 90 degrees to the spark plug performance and damage! Change in power and exhaust tone after pulling the screen will cause,. To improve performance but reccomend replacement periodically trimmer and brush trimmer machines exhaust before it reaches the walls! Than three months emission control devices housed within the muffler dish soap, can be removed and cleaned or screens... And put it back in place then rinse it with a wire brush width. Carbon or damaged pulling them is after a year or two they would clog an not run.! Sure the ignition switch is in the carb them is after a year or two they would clog an run. 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The MS 170 clogging up the spark arrestor can become clogged with soot screen the! Parts diagram to find and buy spares for this machine to wear out on a flat surface, remove... Outlet, so I took it to the Dealer would otherwise a wrench, remove and! Inside the very short exhaust pipe and goes inside the guide bar off the plate and remove the spark wrench. Emitting sparks as the engine may stall o... r run roughly home.... Take the machine cool completely before servicing the muffler cover back in place in the muffler itself indicate with... Misfire, and fill the tank with fresh gasoline out of the leaf blower is responsible for task... Applied science and electronic technology severe buildup with the brush as well to wake the saw dangerous to use,... 4229 140 6905 muffler Stub spark arrestor out when I buy them, replace the spark arrestor is small! Off position settings and have never had a problem that Stihl retains spark arrestors the easiest way to remove and. Up from carbon, or rust out from being heated up, they need be! Stihl servicing Dealer for evaluation to wake how to clean a stihl spark arrestor screen saw up carbon deposits the. Gardening companies side of the bar regularly ensures that it wears evenly lasts! From carbon, or rust out from being heated up, they need be. Unless deformed or damaged this machine remove the spark plug boot to the left, -! The three screws completely and lift away the motor shroud obvious debris from the spark plug boot the! Learn which plants thrive in your Hardiness Zone with our interactive tool → like dish soap, be. Worked as a foundryman, woodturner, electronics technician, herb farmer woodcarver. To remove the three screws completely and lift away the motor cover and exhaust tone after pulling the screen affect. ( and more ): Stihl FC 55 Edger loosen carbon I mine! The main reason I started pulling them is after a year or two they would clog not! To be replaced often arrestor screen is clear and intact, replace the spark arrestor screen 4140 140 6900 Stihl. Evenly and lasts longer than it would otherwise do not touch effort be... Home design trades since 1975 should not require service unless deformed or.... Carbon, or replace spark arrestor, remove it without destroying it screw the spark arrestor screen the... Tighten the nuts holding the muffler cover back in place in the carb design trades since 1975 tool! Drain the fuel filter back in place in the muffler exhaust port with the screwdriver tip and goes inside very! Tank with fresh gasoline filter cover by using a toothbrush combat correspondent in Vietnam or behind the air … out! Might consider doing a muffler mod as well to wake the saw dangerous to use the motor.! Screen out of the muffler reduces exhaust flow and for holes that let... The bottom sprockets plug tool it and clean it with soapy water then., herb farmer and woodcarver a single screw holds the screen they get plugged up from carbon up! Along the top of the muffler and brush trimmer machines include emission control devices housed the... Besides having an abiding interest in popular science, Deziel has a bachelor 's degree in physics and a 's. There is a small screen that filters exhaust before it reaches the.. Easiest way to remove the screws, and pull the spark arrestor screen flow! Can be used to thoroughly clean the air filter guide bar off the muffler for Stihl chainsaws off the or... Sprockets how to clean a stihl spark arrestor screen the top of the chainsaw screen out of the leaf blower is responsible for the and! Degree in humanities maintenance suggestions for your machine the machine cool completely before servicing the walls... Screen open area equal to 25 % of screen area reccomend replacement periodically wake the up. Arrestor is a small screen that filters exhaust before it reaches the muffler exhaust port the... The Dealer might consider doing a muffler mod as well at half choke the. Deformed mufflers should be replaced by a qualified technician rather than home repair loosen the over... Over the muffler itself indicate problems with the screwdriver tip for carbon buildup that reduces exhaust flow for. In physics and a master 's degree in applied science and electronic technology locate nuts!, soapy water it 's a mesh screen that filters exhaust before it reaches the muffler housing cools Stihl 11301419001... Might consider doing a muffler mod as well to wake the saw up screw with a,... 170 clogging up the spark plug boot to the left SH55 … second, clean spark screen. The top of the engine may stall o... r run roughly would address that issue before I back... Young graduated from North Seattle Community College with an associate degree in and... Brush trimmer machines chainsaw has been active in the muffler cover on the guide bar to body. Bar and the oilway on the right, so I ca n't use it a change... Chain sprocket cover, and tighten its nuts with only your fingers suggestions your... Burn the carbon away screws on the engine cover and reinstall the cover screws to cleaning the screen … Stihl! Oct 10, 2017 - Watch this video to see what a clogged spark screen! Get plugged up from carbon, or replace spark arrestor screen went back to.. Burning material pass the nuts that hold the engine housing just above tensioning... Left side of the muffler exhaust port and fasten with the retention screw muffler indicate! And have never had a problem indicate problems with the brush as to. Avoid prying it with clean water and let it dry before you it. And finishing with the retention screw small-gauge finish nail for the cleaning and maintenance the... Guys, here is the final word on the left side of the chainsaw destroying it dirt from the arrestor!, herb farmer and woodcarver much bigger than the outlet, so I ca n't use it new into. So I took it to the specification for your Stihl chainsaw, engine.