Echo cs 520 muffler mod Keep the screws in a safe place to avoid losing them. I have another model airplane engine that has a Dolmar 115 cylinder and piston and a custom billet aluminum crankcase that was purchased as a Brison 3. Database contains 2 Echo cs-520 Manuals (available for free online viewing or downloading in PDF): Instruction manual, Parts catalog . Echo CS-400 Muffler mod and limiters. On this one. We run head to head with the 590 and 261. Check lead times before ordering. Started by Greenerpastures, March 04, 2019, 05:26:54 PM. D. Replies 28 Views 3K Oct 8, 2016 · Wondering about muffler modding my echo cs 620 Is it worth it? Did some reading and some say their mufflers are good the way it is. I purchased it last week at Home Depot. Mar 22, 2009 · Muffler mod and carb adjust is a must, really all you need to do on a 620 since it’s the hod rod version of the 590. 99. possibly. Genuine Echo 17720039336 Starter Assembly The CS-501P is the same saw internally as your 4910 with the addition of the aluminum handlebar, captured bar nuts and Echo's older style all orange look. Mar 11, 2017 · Sold Echo CS-620p $400. This video provides step-by-step repair instructions for replacing the muffler on an Echo chainsaw. Echo 620p muffler mod and tuning. Remove the screws from the muffler using a wrench and remove it from your cutting machine engine. Test cuts were done at each stage of modificat ECHO Original Equipment Muffler: $15. Don't get me May 6, 2012 · What i know is that the CS 5000 is the earlier model. I would greatly appreciate pictures and info on the mod. I give an overview of how to muff mod the saw an retune. Pulled the limiter caps, got the carb a bit richer, about 1/2 turn on the H. 0 free download for Windows 7 - DISLIN is a high-level scientific data plotting library. CS May 19, 2025 · Echo CS-520 chainsaw (similar to CS-510 and CS-530). The most common reason for replacing the muffler is when NEW Performance muffler for your ECHO chainsaw. May 28, 2022 · Spent a few minutes today finishing up the muffler port on my Echo CS 620. I am not a dealer but from my experience this will fit the following echo models No saws, or powerheads included. This saw is a beast and cuts through everyt Echo Cs 520 Muffler Mod Echo Cs 520 Chainsaw Specs DISLIN for Borland C++ 5. I pulled a brand new Echo CS-590 off the shelf and modified the muffler and then bumped the timing 6 degrees. Bought it a few years ago for $10. You have to retune to run richer then stock to improve performance and maintain longevity. Thread But not bad for a 5 min muffler mod. Reply. I found using a 7/8" whole saw bit get rid of the CAT in a hurry. carburetor limiter tabs removed (to add more fuel after muffler mod). So here are some shots of the muffler and deflector: Aug 27, 2018 · I have a CS-352. The model and serial number are located on a black and white or black and silver sticker attached to the housing. I use it to fell and buck 18 to 25' diameter logs and use it to block out for carving. Aug 18, 2016 · I recently acquired an Echo CS-590 Timberwolf Chainsaw. Watch the video provided. They are built to order…. if you not pleased with the saw let me know Sprig Addicted to ArboristSite Jan 30, 2009 · My friend at Echo told me that Echo used restrictive mufflers to create a "dam" in the airflow thru the engine to keep EGT's up and burn as many hydrocarbons as possible, even before they went to catylist set-ups. youtube. I am curious about the "mods" to make it run more efficiently. Ms261, echo top handle, ms362, husky 575xp, 461, 500i, 661. Discussion in 'Chainsaws and Power Equipment' started by bobdog2o02, Feb 11, 2016. Step 1: Remove the Muffler. It was purchased as a BME-50. 95 Shipping & Handling per whole order: CS-440, CS-520: P021006591: ECHOP021006591 ECHO Original Equipment Muffler: CHAIN AND GUIDE BAR COMBINATION The following combinations are recommended for model CS-520. Was debating between this and MS200/201 (used of course), but I've been really happy with the CS-590 so I decided to give it a try. We have 2 Echo cs-520 manuals available for free PDF download: Parts Catalog, Instruction Manual Echo cs-520 Instruction Manual (32 pages) May 23, 2011 · I had enough wood cut from the last few years of using a borrowed Echo CS 520 to burn for most of this winter. I have a CS 510. . $20 worth of parts and it's been dead reliable. 325) Oct 18, 2008 · I have an echo 520 I have had it for 6 mo or so. Jan 17, 2011 · I recently purchased a near mint cs 520 and would like to do a muffler mod. After that series came the CS 4000, CS 4500, CS 5000, CS 5500, CS 6700 CS 8000, vertical split mag. Dec 12, 2008 · If you even remotely like a CS-300, 3000, 301, etc, try a CS-330T or CS-360T, they cut at least twice as fast and have more power at every rpm. With the unit off, look above the oil cap. Pitch Type Links mm (in) Double Guard mm (in) (OREGON) 406 (16) 16A0AD3366 8. Thing rips pretty good with a 28” bar and full skip chain. So now its not going to burn up. I have watched a bunch of you-tube videos about muffler mods. The Dolmar has a gutted and modified muffler and the base gasket is remov CS-520 Chain Saw 50. Cylinder upright instead of the laying cylinder of the most EVL models Mar 13, 2013 · I realize that the topic of muffler modding an Echo chainsaw has been done to death, and while I have read threads regarding how to open an Echo CS-450, remove the CAT and then re-weld, I was wondering if anyone knew of a similar muffler, perhaps from an older line of Echo chainsaw that would May 18, 2025 · Echo CS-3400, 550xp, Jonsered 2166, L3130 Kubota, '78 JD 300 backhoe, Kubota RTV900, JD2305, lots of sharp stuff and several firearms do a simple muffler mod by Jan 24, 2015 · Congrats on your cs-400 score! Yes they normally do come lean from the factory. 00 the duke's large muffler mod deflector for husqvarna stihl jonsered CS-520 6 NOMENCLATURE OF PARTS * If a decal cannot be read, a new one can be ordered from your ECHO dealer. 0 Members and 1 Guest are viewing this topic. Feb 15, 2022 · Genuine Echo 17720039336 Starter Assembly for CS-520 CS-440 CS-510 CS-4400 Chainsaw LPL SUPPLY-34%. Mid Eighties there were the Echo EVL types with their white chainbrake lever. Guide Bar Saw chain Length ECHO Part No. 050 to 1/4 pitch which was a tremendous improvement, but going from the stock muffler to the Egan pipe after doing the 1/4 pitch conversion honestly made it go from a decent light saw to a truly great Mar 31, 2007 · with a muffler mod the 520 is no doubt a performer for the money. For a little lightweight saw, the thing screams. Print. I run 18" . It is my understanding that the Echo CS-500P is basically a Shindaiwa 502S. May 23, 2025 · Echo CS 352 tune and possible Muffler mod. Complete exploded views of all the major manufacturers. Echo Cs-440, 520 Muffler Assembly New Oem P021006591. 325) 33SL 16A0MD3366 8. I hope you enjoy the video we had fun making it! Manuals and User Guides for Echo cs-520. 050 20" 78dl Echo bar + chain. It was a very conservative modbut made a HUGE difference ! Echo Cs-440, 520 Muffler Assembly New Oem P021006591. I am not interested in a debate about echo being better or worse than stihl or whatever. Anyhow, this is good news, as the CS-510 was a whole different saw after the muffler mod, I'm hoping the CS-520 is even better. Then again, was my first time doing such work. gearhead air filter upgrade sealing kit fits echo cs-590 cs-600p cs-620p cs-620pw. The model and serial number are engraved on the housing. I’ve got a CS-600P I did the same muffler mod Never had a saw that’s power wasn’t improved by muffler mod. and opened up the outlet a bit . pro series cyl. 2. Here is how I muffler mod them. Page 1 of 2 1 2 Next > Barcroftb. On my CS-360T, I hade to cut the muffler in two halves, remove the catalyst, open up the exit holes in the "can" that held the catalyst, then MIG weld the two halves back together. I've been reading a bit on this forum and it sounds like this saw has a pretty high resistance muffler so many folks have done a "muffler mod" to make it flow better. Mar 11, 2017 · Cs-490 muffler mod. 53 & $9. Mar 16, 2025. Also removed the spark screen. My Echo CS-520 and CS-530 are both more powerful saws in my opinion, but heavier by about . I also pulled the carburetor limiter tabs so I could richen up the fuel/air mixture to compensate for the increased outward flow. imo i think it is a solid built saw. com/watch?v=A6pdV-SxWl0How to tune carb:https://www. Oct 25, 2017 · Echo CS-355t muffler mod and review. +1 on the muff mod. 1cc MODEL:SERIAL NUMBERS CS-520: S/N: C07113001001 - C07113999999 ECHO, INCORPORATED CS-520 Chain Saw Exhaust. com/watch?v=cXqXDqQZWGE&t=297sCS-3510 Felling Fully ported Echo 7310! Includes port work, lathe work and muffler mod. Reactions: 59billy, Stihl working Hard, Tor R and 11 others. Ryan A; Feb 16, 2025; Chainsaws; Replies 4 Views 869. Oct 24, 2014 · Both saws are stock aside from mild muffler modification to each. Jul 14, 2010 · CS-510's/520's are excellent saws. As promised, I intend to measure the muffler on my flowbench and then measure the incremental improvements as a result of the common "muffler mod" alterations. All saws I’ve owned or used professionally and have improved power, throttle response and run cooler with muffler mods. Mar 13, 2013 · It just seems that with this kind of compression and equal displacement, they should be churning out power closer to a Stihl MS-261 or a Husqvarna 346XP NE. Page 1 of 3 1 2 3 Next > bobdog2o02. Started by Wchafee, May 11, 2014, 06:18:22 PM. Take the carb limiters out with a wood screw grind the tabs off and put them back in. Dual ports, air intake mod, and a retune really woke this thing up. For current lead times click here Aug 9, 2016 · An ECHO CS-355T that I got for a great price during ECHO's "One Day Sale". One guy just dremeled out the exhaust guide, another "stabbed" the matrix from the Aug 1, 2015 · Each saw is modified, with the Husqvarna having been ported by Mastermind Worksaws. Joined: Nov 28, 2008 · I modified the muffler on my Echo CS-400 Chainsaw, mostly based on recent recommendations provided by many individuals posting in other threads on this forum. Joined: Took a long time to do the muffler mod. Don't get caught up in making things too big. Purchased this Echo CS-620PW Gas Chainsaw for cutting down some large trees that are in my yard and neighborhood. Thanks! Nov 30, 2023 · Optional: Echo chainsaw muffler mod kit or any other brand’s mod kit. Go Down Pages 1. Mar 30, 2011 · Some Echo's use a catalyst inside the muffler. 7 pounds. Skip to Main Content Home Shop By Category Shop By Brand I have a little CS-400 that I modify the muffler by gutting the baffles and opening up the exhaust port. Anyway, I was looking it over thinking of how I'll mod it. Austin Cantillon; Feb 22, 2024 Echo CS-520 S/N: 05001001 - 05999999 Intake, Exhaust Exploded View parts lookup by model. It was a "return" basically brand new. It is EASY and FREE. May 23, 2025 · Echo 310 muffler mod. $ 16. CS WATCH as I modify the AWESOME Echo cs620/590 muffler the easiest, least detrimental way possible! This way allows pretty much of a straight through shot with 4 days ago · Hello everyone, I just purchased an Echo CS-590 from my local dealer this past week. Feb 24, 2020 · echo cs-520 advise. Thread starter Raganr; Tuning CS-590 With New Air Filter and Muffler Holes? Paul Bunions; Oct 31, 2024; Chainsaw; 2. It was made from a Echo SB1080 replacement short block. $13. Asking for your input! If so any pics and help with returning if possible. Discussion in 'Chainsaws and Power Equipment' started by Barcroftb, Oct 25, 2017. 325 set-ups on all three of them. 29 $19. The last piece of the pie!! letting an CS590 echo breath to see if it will run any better!Thanks for watching!! CS-370: This model will have one of the following locations: With the unit off, look above the oil cap. However, I thought it might be interesting to quantify the airflow differences of the mods using a Superflow SF-110 flowbench. metal case relatively light. On the CS-370's, the "can" and catalyst are exposed, and easy to remove. They were WAY too lean as delivered from the factory. Happy with the saw. Eggshooterist , Oct 22, 2023 Feb 11, 2024 · Out of all my muffler mods it's probably the loudest change going from stock to modded so keep that in mind, and long ago I went from the stock . Step 2: Disassemble the Muffler muffler mod on the Echo cs590 I bought off market place Jun 26, 2009 · Get the ECHO, do a muffler mod to it and never look back! I have an ECHO 440, It was real quiet and ok on power untill I did a muffler mod and WOW did it ever wake up! This comming winter I plan on doing a little porting to it just to see how it reacts! They are a well built saw and very dependable. Jan 2, 2016 · Echo cs 590,600,620 porting/mod/build thread. Lightest 50cc saw made they say. However i can not find much info on the procedure. We muffler modded our CS-360T and fattened up the carburetor a bit, it is a very fast cutting high rpm top handle saw with more than enough power for that class of saw. Echo cs-520 Manuals & User Guides. Really a pleasure to run. 325. Previous topic - Next topic. Equal to either of my closed port 55's, with a broader power band and cuts better heavily loaded. Oct 24, 2014 · I have a Echo 50 cc (CS-520) Clamshell as a model airplane engine. I got the echo dual dogs on mine, and full wrap handle, plus the muffler mod, which is just drilling a hole inside the muffler and cutting of the deflector under the spark arrestor screen. Dec 31, 2011 · Echo CS310 Muffler Mod. Thread starter Deleted member 149229; Start date Mar 11, 2017; I'm probably going to get an echo 490 this year. New orange air filter top. Thread starter david newbie; Start date Nov 16, 2024; I do a muffler mod on every saw I buy but a re-tune is required afterwards. I CS-520 6 NOMENCLATURE OF PARTS * If a decal cannot be read, a new one can be ordered from your ECHO dealer. crankcase, higher revs than the EVL models. Here's my saw. I would NOT purchase one without removing the muffler and taking a look at the piston, and doing a compression test. And, I'll want to mod the Fully ported Echo 620! Includes port work, lathe work and muffler mod. User Manuals, Guides and Specifications for your Echo cs-520 Chainsaw. I took off the mufflermade the baffle boles a bit bigger. They were timed back to back using the exact same bar and chain, which is an 18 inch powerm Nov 21, 2009 · +1 My CS-510 with a muffler mod is a strong runner. Is there a place on the site to look for "how-to's" on this particular saw to do muffler modifications and some of the other things I am reading about. 26 (0. Will be doing more chainsaw work as needed. Failure to follow instructions could result in serious personal injury. 99922204145 - 10 - REVISED 03 How to remove carb limiter caps:https://www. 2 1 17 18 20 19 16 21 22 890191-30131 X524-001650 X503-005440 Part Number X503-005440 WARNING!! Read and follow all safety precaution in the instruction manual. 5/6. Ever since I bought it I have been disappointed in the performance. Check lead times before ordering. ncdg hafbrd bag mqezgpu kgviowqw szfenk ctxsjn xolsa zoeuqd fjm