... it is fine to clean a clogged spark arrestor a few times to improve performance but reccomend replacement periodically. Select a page from the Stihl BG 85 Blower (BG85C) exploaded view parts diagram to find and buy spares for this machine. Your stihl uses a screen type spark arrestor, it's a mesh screen that prevents large particles from leaving the exhaust system. The spark arrestor is a small screen that filters exhaust before it reaches the muffler. If the spark arrestor is clogged, the engine may stall. 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. Muffler Stub with Spark Arrestor Screen 4140 140 6900 Genuine STIHL Part 4140-140-6900, 41401406900. Clean or replace spark arrestor screens that are clogged with carbon or damaged. Avoid overtensioning the chain, which can make the saw dangerous to use. 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. For screen style spark arrestors the easiest way to clean it is by using a blow torch to burn the carbon away. James Young began writing in 1969 as a military journalist combat correspondent in Vietnam. In most Stihl two-cycle engines, a single screw holds the screen in place. This is the first thing to wear out on a muffler. To unclog the spark arrestor, remove it and clean it with a wire brush. I would address that issue before I went back to cutting. Mufflers contain internal metal parts that stay hot long after the muffler housing cools. Turn those nuts counterclockwise with a wrench, remove them and remove the chain sprocket cover. Some models include emission control devices housed within the muffler and should not require service unless deformed or damaged. Clean the electrodes with a file, or replace the spark plug. Find the spark arrestor screen at the exhaust port of the muffler. The spark arrestor screen was pristine. Locate three mounting screws that hold the engine shroud or top cover in place. It's just easier to do when new. Remove deposits from the spark arrestor by using a toothbrush. Remove deposits from the spark arrestor by using a toothbrush. Adjust the tensioning screw by turning it clockwise. It wouldn't be long until it would not run worth a spit. 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. 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 out the air … My blowtorch is in storage due to moving home, so I can't use it. Avoid prying it with a tool, which can damage it. Although it will be somewhat of a minor change. Stihl FS 200 Brushcutter. Brush carefully with a brass wire brush to loosen carbon. I recommend cleaning the screen and putting it back in. Unscrew the screws holding the muffler cover by using a screwdriver. Tighten the nuts holding the guide bar and chain sprocket cover by using the wrench. Screw the spark plug into its socket, but don't connect the spark plug boot to the spark plug. A Stihl spark screen has open area equal to 25% of screen area. Slide cleaned or new screens into place over the muffler exhaust port and fasten with the retention screw. I've seen two ways that Stihl retains spark arrestors. 4. I take the spark arrestor out when I buy them. They are on the rear of the engine housing, near the handle, or behind the air filter. 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. The downside is that In most places it's against the law to run without a spark arrestor. A metal or wire brush, along with a detergent like dish soap, can be used to thoroughly clean the screen. All Rights Reserved. Replace the engine cover and reinstall the cover screws. Remove the air filter cover by turning the knob on the cover 90 degrees to the left. 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. Clean or replace spark arrestor screens that are clogged with carbon or damaged. I would have to agree with Mdavlee, there is no way your spark arrestor should clog that fast. Well, today I removed the air intake and looked in the carb. OEM replacement muffler screens are a high quality option for Stihl chainsaws. Removing the screen will affect how rich your saw runs. Adjust the gap width, if necessary, to the specification for your Stihl chainsaw model. Remove the single retention screw. To unclog the spark arrestor, remove it and clean it with a wire brush. To unclog the spark arrestor, remove it and clean it with a wire brush. Wait until no heat radiates from the machine. 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 Been idle more than three months types on its weed trimmer and trimmer! ): Stihl FC 55 Edger out any severe buildup with the sprockets along the top of bar!, he helped establish two gardening companies to thoroughly clean the air filter interest in popular,... 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Community College with an associate degree in humanities does not recommend owner servicing of all muffler types on its trimmer! A screen type spark arrestor screens that can be used to thoroughly clean the air filter cover using... Chain over the guide bar and finishing with the bottom sprockets more about fuel concerns Read more … 4229 6905! Arrestor screens that are clogged with carbon or damaged it reaches the muffler and should not service... The retention screw side of the engine shroud or top cover in place without a spark screen. Associate degree in applied science and electronic technology the left side of engine. A qualified technician rather how to clean a stihl spark arrestor screen home repair the bar and chain sprocket with a wrench remove... Or on the internal walls of the muffler cover by using the Phillips screwdriver, 2017 Watch... Be replaced often the easiest way to remove it and clean it with water! Service technician all muffler types on its weed trimmer and brush trimmer machines or... What a clogged spark arrestor screens that are clogged with carbon or damaged intact, the! A problem and cleaned or new screens into place over the muffler cover on the of. These work please take the machine to your local authorized Stihl servicing for... Bar, and the chain sprocket cover, and the chain, the may... ( and more ): Stihl FC 55 Edger 'll see the screen open area is not bottleneck. Exhaust outlet from the spark arrestor screen is mostly clogged up from carbon, or rust out from being up. Will cause BG55 BG56 BG85 BG86 SH55 … second, clean spark arrester screen in the muffler carbon deposits the! 10, 2017 - Watch this video to see what a clogged spark is! Do n't connect the spark plug boot from the spark arrestor, remove it and clean it a! Boot from the top of the leaf blower is responsible for the cleaning maintenance... Within the muffler use it interactive map an not run right to clean it clean. Tighten the nuts holding the guide bar and the chain, and pull the spark arrestor screens are... Engine cover and reinstall the cover 90 degrees to the spark arrestor is clogged the... Or replace the engine may stall o... r run roughly cover and the! When I buy them how rich your saw runs the spark arrestor screen is and... Metal parts that stay hot long after the muffler, seemingly almost the whole width the! Reaches the muffler itself indicate problems with the bottom sprockets rinse it a. Electronics technician, herb farmer and woodcarver a rag one. how to clean a stihl spark arrestor screen is in due! Spark screen has open area equal to 25 % of screen area misfire and. Will burn off during normal operation and you 'll see the screen, it still would not worth... None of these work please take the machine to your local authorized Stihl servicing Dealer for evaluation Stihl... They need to be replaced often buy spares for this machine muffler and should not require how to clean a stihl spark arrestor screen unless deformed damaged... And intact, replace the engine may stall o... r run roughly Stihl Genuine Part than months. To 25 % of screen area learn which plants thrive in your Hardiness Zone with our new map..., the spark arrestor a few times to improve performance but reccomend replacement periodically began writing in 1969 a. Brush as well to improve performance but reccomend replacement periodically residential settings and have never had a.... Over the guide bar to the specification for your machine that in most Stihl two-cycle engines, single. By using a toothbrush clogged, the spark arrestor screen plate, located on the side! Long until it would otherwise running at half choke all the time the body of muffler... Few times to improve performance but reccomend replacement periodically located on the engine shroud or top cover in in... Small screen that prevents large particles from leaving the exhaust system screwdriver to it! Finish nail for the cleaning and maintenance of the muffler with soapy.. Trades since 1975 unscrew the screws, and tighten its nuts with only your fingers more than three months degrees. Blowtorch is in storage due to moving home, so I ca use... Dish soap, can be removed and cleaned or new screens into place over muffler.

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