Required Part. If the spark arrestor is clogged, the chainsaw may run stall or run rough. If your ATV does not have a spark arrestor there is a chance that small particles from the engine itself will exit through the exhaust like a glowing red spark. Nature Friendly Spark Arrestor/Yamaha,,Nature Friendly Spark Arrestors,procircuit.com TEL: 951-738-8050 FAX: 951-738-8065 ADDRESS: 2771 Wardlow Rd., Corona, CA 92882 View Cart It prevents it from reaching top dead center before the spark goes off. Usually, the arrestor is relatively easily removed for proper manual cleaning, or the muffler is equipped with some type of cleanout plug to make accessing and cleaning fast and easy. The spark arrestor stops the engine from discharging sparks. 3. Mine done the same thing your talking about man...I changed spark plugs , oil and next step was the fuel pump... it ran just like that with no power at all and I stuck my hand over the exhaust and felt out wasn't right so I pulled the spark arrestor/ baffle out and i cranked it up and ran perfectly without it so i cleaned it up real good and put it back in and it's ran like a champ since, I cant remember exactly I have a friend that has a mechanic shop and he had some stuff there...I wanna say it was some kind of carbon break up stuff. Pull the whole thing out and look at how it is made, the end in the muffler is closed off and the exhaust has to go around it in the small pipe of the muffler. Which Are Not? A simple boat plug will work! Remove the spark arrestor and leave out or clean and reinstall SPARK ARRESTOR - DRR - Quads bogs won't go! Dirty Muffler. Use a screwdriver to gently “feel” if there is a screen there. Remove the muffler cap. If I'm not mistaken, the 250 Recon doesn't have a removable spark arrester. I ride a lot of mud and water with my Rhino with stock exhaust. In simple terms, it’s like having a phlegm-y cough. Full Forum Listing. The engine and tailpipe will sound irritated or strained. Over time, the spark arrestor can become clogged with soot. No start situation Repair; Remove the 4mm hex Spark Arrestor Screen retaining bolt from the muffler as … Put it in the exhaust and tighten it up then pull it out with a wrench. Mine came right out and then I cleaned it with brake cleaner and used a small screwdriver to break loose the carbon around the head of the Arrestor. Took it out and the spark arrestor was clogged completely SHUT! The muffler screen (spark arrestor) will be layered beneath the muffler cap; Clean or replace the muffler screen (spark arrestor) with carburetor cleaner, using a soft brush Note: If the screen remains plugged after attempts at cleaning it, it must be replaced The spark arrester is usually a small screen on the muffler. Maybe it got wet with mud, then the mud dried and left dirt? So I think the arrestors that aren't removable aren't built as restrictive as the ones that are. But it won’t run at high RPM because the exhaust can’t escape this effects back pressure and the intake ports won’t have vacuum to bring in fresh charge of air and gas. They sell it at appiance parts stores.