I recommend cleaning the screen and putting it back in. Plan the perfect garden with our interactive tool →. Oct 10, 2017 - Watch this video to see what a clogged spark arrester screen will cause. Pull the spark arrestor from behind the muffler. Some spark screens are much bigger than the outlet, so that the screen open area is not a bottleneck. Lift and pull the spark arresting screen out of the muffler. 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. Turn over the guide bar, and put it back in place in the chainsaw. OEM replacement muffler screens are a high quality option for Stihl chainsaws. 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. This is the first thing to wear out on a muffler. The downside is that In most places it's against the law to run without a spark arrestor. Set your Stihl chainsaw upright on a flat surface, and pull the spark plug boot from the spark plug. 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. © Copyright 2020 Hearst Communications, Inc. Pull the spark arrestor from behind the 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. 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. 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. 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). Once the screen is cool to the touch, re-install it in the exhaust … 1130 141 9001 Stihl Spark Arrestor Screen Genuine Stihl Part 11301419001. If the spark arrestor is clogged, the engine may stall. Learn more about fuel concerns Read … "Every effort should be made to install a new screen before consideration is given to cleaning … Fit the chain over the guide bar, starting with the sprockets along the top of the bar and finishing with the bottom sprockets. Third, replace fuel filter in fuel tank. Locate three mounting screws that hold the engine shroud or top cover in place. Clean the air filter with compressed air or warm, soapy water. All Rights Reserved. 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. Scoop out any severe buildup with the screwdriver tip. Thirty minutes of cool-down should be plenty. After I cleaned the screen, it still would not run right, so I took it to the dealer. Remove deposits from the spark arrestor by using a toothbrush. Find the spark arrestor screen at the exhaust port of the muffler. Over time, the spark arrestor can become clogged with soot. Second, clean spark arrester screen in the muffler. Stihl FS 120 Brushcutter. Make sure the ignition switch is in the the off position. You can use a 9/16" 6 point socket to remove it too. Even when the screen is clean there is a noticeable change in power and exhaust tone after pulling the screen. Slide cleaned or new screens into place over the muffler exhaust port and fasten with the retention screw. 42291406905, 4229-140-6905 Fits STIHL models: BG55 BG56 BG85 BG86 … The spark arrestor is inside the very short exhaust pipe and goes inside the muffler, seemingly almost the whole width of the muffler. Over time, the spark arrestor can become clogged with soot. Spray with carburetor cleaner until you can see through all of the holes in the screen. "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 . Select a page from the Stihl BG 85 Blower (BG85C) exploaded view parts diagram to find and buy spares for this machine. Remove deposits from the spark arrestor by using a toothbrush. Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. The smaller end fits the spark arrestor plug in the muffler. You will find the spark arrestor screen is mostly clogged up from carbon build up. 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. 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 Oil in or on the muffler isn't unusual and will burn off during normal operation. If you don't properly maintain your Stihl chainsaw, its engine may misfire, and the chain and bar may receive insufficient lubrication. Other models without emission control mufflers may include spark arrestor screens that can be removed and cleaned or replaced by owners. I would have to agree with Mdavlee, there is no way your spark arrestor should clog that fast. One has a screw go through the screen. Carbon deposits in the muffler itself indicate problems with the fuel mix. Reinstall screen and … 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 … "Every effort should be made to install a new screen before consideration is given to cleaning the existing one." Remove all debris from inside the guide bar's grooves. Remove the spark plug from its socket by using a spark plug wrench. 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 A Stihl spark screen has open area equal to 25% of screen area. "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 . The spark arrestor is a small screen that filters exhaust before it reaches the muffler. the first thing I do to them, besides adjusting the handle, is removing the spark arrester screen. Learn which plants thrive in your Hardiness Zone with our new interactive map! Stihl FS 250 Brushcutter. Stihl does not recommend owner servicing of all muffler types on its weed trimmer and brush trimmer machines. He has worked as a foundryman, woodturner, electronics technician, herb farmer and woodcarver. Avoid prying it with a tool, which can damage it. Let the machine cool completely before servicing the muffler. I would have to agree with Mdavlee, there is no way your spark arrestor should clog that fast. Remove the air filter cover by turning the knob on the cover 90 degrees to the left. You might consider doing a muffler mod as well to wake the saw up. To unclog the spark arrestor, remove it and clean it with a wire brush. You may also replace the spark arrestor. Pull out the air filter with your fingers. Test by holding a hand near the top of the engine but do not touch. It's just easier to do when new. Removing the screen will affect how rich your saw runs. I use opti-2, sometimes amsoil sabre, both 100:1, and as soon as I buy a new handheld trimmer, blower, edger, etc. You may also replace the spark arrestor. Removing the screen will affect how rich your saw runs. Well, today I removed the air intake and looked in the carb. Locate three mounting screws that hold the engine shroud or top cover in place. Set the screen aside to let it cool. Replace the engine cover and reinstall the cover screws. Pull off the plate and remove the spark arrestor screen. The spark arrestor screen was pristine. 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. Your stihl uses a screen type spark arrestor, it's a mesh screen that prevents large particles from leaving the exhaust system. Remove the two small screws on the spark arrestor screen plate, located on the muffler, on the left side of the blower. Brush carefully with a brass wire brush to loosen carbon. Clear away any obvious debris from the top of the engine and muffler. You may also replace the spark arrestor. Return the spark arrestor to its place behind the muffler. 4. Locate the nuts that hold the guide bar to the body of the chainsaw. 42291406905, 4229-140-6905 Fits STIHL models: BG55 BG56 BG85 BG86 SH55 … My blowtorch is in storage due to moving home, so I can't use it. Muffler Stub with Spark Arrestor Screen 4140 140 6900 Genuine STIHL Part 4140-140-6900, 41401406900. Fourth, clean or replace air filter. Clean the electrodes with a file, or replace the spark plug. I would address that issue before I went back to cutting. To unclog the spark arrestor, remove it and clean it with a wire brush. The carburetor screws may need to be adjusted. Stihl recommends replacement by a qualified technician rather than home repair. 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. alt. Over time, the spark arrestor can become clogged with soot. Stihl FS 46 Brushcutter. Copyright Leaf Group Ltd. // Leaf Group Lifestyle. Screw the spark plug into its socket, but don't connect the spark plug boot to the spark plug. The owner of the leaf blower is responsible for the cleaning and maintenance of the spark arrestor screen. Young graduated from North Seattle Community College with an associate degree in applied science and electronic technology. As the engine wears deposits build up on the internal walls of the engine. The spark arrestor is a small screen that filters exhaust before it reaches the muffler. Your trimmer should have come with a spark plug tool. If the spark arrestor is clogged, the engine may stall o... r run roughly. James Young began writing in 1969 as a military journalist combat correspondent in Vietnam. Replace the engine cover and reinstall the cover screws. Stihl does not recommend owner servicing of all muffler types on its weed trimmer and brush trimmer machines. Verified purchase: Yes | Condition: New. Remove the screws, and lift off the muffler cover. 4229 140 6905 Muffler Stub Spark Arrestor w/ Screen STIHL Genuine Part. If the screen … There are 2 ends on it. Third, replace fuel filter in fuel tank. Lift the guide bar off the bolts or screws. I use mine in residential settings and have never had a problem. Stihl FS 45 Brushcutter. Wait until no heat radiates from the machine. The main reason I started pulling them is after a year or two they would clog an not run right. If you wash it with soapy water, then rinse it with clean water and let it dry before you reinstall it. I've seen two ways that Stihl retains spark arrestors. Very easy repair. Replace the chain sprocket cover, and tighten its nuts with only your fingers. Whether they get plugged up from carbon, or rust out from being heated up, they need to be replaced often. If the spark arrestor is clogged, the engine may stall o... r run roughly. Second, clean spark arrester screen in the muffler. Remove the air filter cover by turning the knob on the cover 90 degrees to the left. I need to clean out a blocked two stroke/cycle muffler and spark arrestor on a string trimmer. Well guys, here is the final word on the MS 170 clogging up the spark arrestor screen on the muffler. 4229 140 6905 Muffler Stub Spark Arrestor w/ Screen STIHL Genuine Part. Adjust the tensioning screw by turning it clockwise. Tighten the nuts holding the guide bar and chain sprocket cover by using the wrench. Scrub out the muffler walls and along the exhaust port with the brush as well. SawTroll The spark arrestor is a small screen that prevents the engine from emitting sparks. If the screen is clear and intact, replace the motor cover. Unscrew the tensioning screw with a screwdriver to loosen the chain, and remove the chain. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. Remove the single retention screw. Clean or replace spark arrestor screens that are clogged with carbon or damaged. Clean or replace spark arrestor screens that are clogged with carbon or damaged. 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 For screen style spark arrestors the easiest way to clean it is by using a blow torch to burn the carbon away. Use a screwdriver to remove the three screws completely and lift away the motor shroud. 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. I would address that issue before I went back to cutting. I can't see a way to remove it without destroying it. In most Stihl two-cycle engines, a single screw holds the screen in place. Clean oil and dirt from the chain, the guide bar and the chain sprocket with a rag. Mufflers contain internal metal parts that stay hot long after the muffler housing cools. Avoid overtensioning the chain, which can make the saw dangerous to use. As a landscape builder, he helped establish two gardening companies. Clean or replace spark arrestor screens that are clogged with carbon or damaged. Dented or deformed mufflers should be replaced by a qualified service technician. Learn more about fuel concerns Read more … To unclog the spark arrestor, remove it and clean it with a wire brush. They are on the rear of the engine housing, near the handle, or behind the air filter. IT WILL BE TIGHT. The spark arrestor is a small screen that prevents the engine from emitting sparks. You might consider doing a muffler mod as well to wake the saw up. 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. Unscrew the screws holding the muffler cover by using a screwdriver. Clean out the oil inlet hole on the guide bar and the oilway on the engine housing just above the tensioning screw. 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. Just remove the plug and you'll see the screen. Young's articles have been published in "Tai Chi Magazine," "Seattle Post-Intelligencer," Sonar 4 ezine, "Stars & Stripes" and "Fine Woodworking." 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. Slide cleaned or new screens into place over the muffler exhaust port and fasten with the retention screw. Most chainsaws sold in North America come with spark arrestor muffler screens (also known as firescreens), to prevent forest fires in dry conditions. alt. Pull out the air … In most Stihl two-cycle engines, a single screw holds the screen in place. Fourth, clean or replace air filter. Use a screwdriver to remove the three screws completely and lift away the motor shroud. I take the spark arrestor out when I buy them. 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. Unscrew the exhaust outlet from the muffler. If none of these work please take the machine to your local authorized STIHL servicing Dealer for evaluation. ... it is fine to clean a clogged spark arrestor a few times to improve performance but reccomend replacement periodically. 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