BEST way to modify Echo 590 and 620 mufflers!!!

[@FarmlessFarmer-xs1he]

Making a fixture to hold the muffler in the vice was so simple and yet so brilliant. Thank you for sharing.

[@waynestanton467]

May do my 620..you could use 2 smaller bolts and nuts. Wouldn't have to tap the threads.

[@oldcodger1929]

You nailed it. Best 590 mod yet.

[@CutterCH]

Did both my 590 & 620 mufflers like that and yanked out the inside tube a few years ago. Saws have never been happier. Makes a huge improvement in performance.

[@skrompf]

Metric treads: M5(outer dia) X 0.8(pitch), pitch is the distance between two treads. Metric is briliant :-)

[@redtiller1975]

Awesome information. If I get another 590 or 620 I'll try that. I still love the your Hammerhead pipe on the Christmas 590.

[@joehackett9471]

Great job! I don't own a 590/620 but do have a 680 and the muffler was extremely choked off on that saw as well. Must be an Echo thing.Great video. Looks great.

[@mikevictor3698]

Wanna hear it run !

[@Super-Dave-Outdoors]

They blow apart pretty easy with a brazing tip on the torch. And slag cleans out better than the chips. I spend longer cleaning them than actually cutting them apart.

[@Mightycaptain]

Do a vid with the alternate way. Then there will be 2 ways out there for reference.

[@FarmlessFarmer-xs1he]

How about a plasma cutter?

[@Super-Dave-Outdoors]

​@@FarmlessFarmer-xs1he never used one but if it doesnt blast through the support tubes then it may be viable. Getting the tube out of there and making it look nice is always the aggravating part.

[@Super-Dave-Outdoors]

​@@Mightycaptaintanks at work that have the brazing set up are empty. And i need to get another muffler to mod.

[@novicelumberjack]

You are getting them apart with a torch?! We need a video of that one. I'd love to know how you manage to do that. I've tried before, and by the time I get one side loose, the side I just did cools and welds back up. For the guy wondering about a plasma cutter- it is just a method of cutting. Cutting them apart isn't the problem. The problem is gutting them and getting them back together. A plasma cutter would be more setup time, and you'd be cutting all the way through and slashing up where you don't want... I could only see that causing a big 'ol mess.

[@robbevington1754]

I did my echo. I use a step bit and needle nose pliers

[@patthesoundguy]

Bam! Instant bark box in 5min. Can't argue with that. Time is money baby 🤑

[@JoshTemplet-h8p]

Can this be done to echo cs440 chainsaw

[@BestNCBBQ]

And we don’t even get to hear it run on the saw?

[@aaronpowell4885]

Awesome! Way faster and easier👍🏻

[@waynestanton467]

How much louder does the mod make the saw?

[@ericvortex5213]

M5: 5mm by 0.8mm.. it's funny to see the Americans trying to understand ISO threads, while in France we twist our heads with your inch threads!😄🙃🤪👍

[@wcm68tn]

For anyone who has modded the 590 muffler, what are your experiences on the increase in power?

[@Super-Dave-Outdoors]

Power gain is very significant if you can adjust your carb properly.

[@AndyAlaska375]

Like SuperDave said it's significant. You can definitely feel an increase in power. I you haven't already you'll need to pull the carb adjustment limiters too and retune. Free HP is good stuff.

[@brandonhoad9033]

If you were to drill a hole opposite of the factory hole would that accomplish the same thing?

[@jeremymyers5643]

That's what I did . Works good. Think 1/2 hole. Maybe 3/8. Definitely louder

[@brandonhoad9033]

@@jeremymyers5643 I asked that hoping he'd give an opinion. I did it several months b4. Seemed much easier than ripping the guts out. I did 1/2" hole, almost the same as the factory hole.

[@jeremymyers5643]

@@brandonhoad9033 I did it to a 590 and 620. Both responded well for me . Of course did deflector and carb limiters . Id be surprised if there is much gain between the extra 1/2 hole and a gutted box.

[@brandonhoad9033]

@@jeremymyers5643 that hole, where we put it, is a pretty darn direct shot, but I'm sure some is still going thru baffles. How much would be neat to know. I only cut 6-8 cord so I certainly won't loose sleep over not knowing

[@Bluzharp2]

If you don't want to tap the holes, just get a couple of nuts.

[@richcooke9241]

Do you sell just the modded 620 mufflers?

[@IowaPerformanceSaws]

You're cooking with gas now my friend!! Beautiful job!

[@MrRmh3481]

No screen. Always a fun vid!

[@tedneitzel]

Sweet!

[@larryw5429]

First thing before you put it back together is throw the screen in the parts bin!

[@S-tank_]

I've done this 1000 times. Despite the fact that I never once have needed a used muffler screen, I find it extremely difficult to throw them or anything else away 😂

[@stevenblake6939]

Legally you need that screen..ifnyou strst a forest fire you will be liable...

[@stevenblake6939]

Plus the screen doesn't restrict anything!

[@jeremymyers5643]

​@@stevenblake6939 also prevents damn mud dobbers from getting in, and most importantly as u said if it's clean it doesent hurt a thing

[@crazyfeller5704]

Yep…couple hours to cut any muffler apart and do a nice job.

[@Doc-Cole_Trickle-of-Chainsaws]

👍🆙BigGuy

[@Doc-Cole_Trickle-of-Chainsaws]

Shirt👊 Good ole Beef Chow Mein!

[@johnkrisovitch69]

Man they shoukd just sell gutted ines already lol