Echo cs-590

[Casey clagg]

Just got my brand new cs-590 it runs awsome. Thinking of doing the muffler mod but I hate to do it under warranty. Can it cause damage to the saw? Also thinking of installing rim sprocket and taking it back to the dealer after the muffler mod and have it retuned. Any thoughts?

 

[Wood Doctor]

Leave it alone and run with it. I've had several professionals rave about this saw. If it ain't broke, don't fix it.

 

[Casey clagg]

It’s a runner for sure just thought maybe I could open it up a little and gain some... thanks for the reply.

 

[TBS]

Just open up the outlet a little or add another hole under the deflector, don't do it while the muffler is on the saw, and clean it out throughly. You may need to richen the high speed after. Imo wait for the warranty to expire if you are concerned about that.

 

[Casey clagg]

Thanks for the info

 

[Marley5]

If you know how to tune it, open it up and let'r rip.
Never used a warranty in over 30 yrs.

 

[RedFir Down]

Just open up the outlet a little or add another hole under the deflector, don't do it while the muffler is on the saw, and clean it out throughly. You may need to richen the high speed after. Imo wait for the warranty to expire if you are concerned about that.

Have you did this method on a 590 before?

 

[TBS]

Have you did this method on a 590 before?

I started to but ended up selling the 590 I had.

 

[Casey clagg]

It’s not the point of having to use the warranty, I haven’t ever used it on a saw either but I hate to void a 2 day old saw just yet. The saw isn’t by any means high dollar but I don’t want to junk the warranty on $400.

 

[RedFir Down]

I started to but ended up selling the 590 I had.

Makes sense. If you drill a hole in the muffler under the deflector on these saws it makes them very loud, almost to the point of annoying.

I have opened up over 30 of these mufflers and would recommend to just remove the bottom half of the deflector and call it a day, its a 10 minute job (it gives the saw a deeper tone and sounds nice). I have yet to see gains by hogging out the muffler on this model. I'd post pictures but they are on a different phone.

 

[Marley5]

Makes sense. If you drill a hole in the muffler under the deflector on these saws it makes them very loud, almost to the point of annoying.

I have opened up over 30 of these mufflers and would recommend to just remove the bottom half of the deflector and call it a day, its a 10 minute job (it gives the saw a deeper tone and sounds nice). I have yet to see gains by hogging out the muffler on this model. I'd post pictures but they are on a different phone.

Yeah I believe removing a portion of the deflector will suffice on this saw as with the 490 but I did remove the restrictor tube behind the spark arrestor.
Smaller CC Echo's that I've done require drilling " hogging " the muffler.

 

[Jed1124]

They come from the factory lean. If you open up the muffler you WILL have to richen up the high side.

 

[Jkstihl]

All you would have to do is buy a 50$ factory muffler off ebay if it ever needed any warranty work done...id go for it...just make sure to richen it up.

 

[RedFir Down]

They come from the factory lean. If you open up the muffler you WILL have to richen up the high side.

Really? How many 590's have setup and tuned?

 

[farmer steve]

@James Miller.

 

[Casey clagg]

All you would have to do is buy a 50$ factory muffler off ebay if it ever needed any warranty work done...id go for it...just make sure to richen it up.

The thought had crossed my mind....

 

[James Miller]

Just got my brand new cs-590 it runs awsome. Thinking of doing the muffler mod but I hate to do it under warranty. Can it cause damage to the saw? Also thinking of installing rim sprocket and taking it back to the dealer after the muffler mod and have it retuned. Any thoughts?

@James Miller.

I would set the high side limiter as rich as it will go and just run it. I ran mine stock down to the limiters for a year or better. Never noticed a lean condition in temps ranging from 25* to 95*. I hear alot about them being lean from the factory but mine was fine.
The muffler mod isn't really a muffler mod. For a stock saw you just pull the internal baffle out of the deflector. Just the deflector mod is worth a 50% gain in flow through the muffler with out doing anything to the actual muffler.
Honestly I'd just run it stock for awhile.

 

[James Miller]

Makes sense. If you drill a hole in the muffler under the deflector on these saws it makes them very loud, almost to the point of annoying.

I have opened up over 30 of these mufflers and would recommend to just remove the bottom half of the deflector and call it a day, its a 10 minute job (it gives the saw a deeper tone and sounds nice). I have yet to see gains by hogging out the muffler on this model. I'd post pictures but they are on a different phone.

Short video showing what your talking about with the deflector mod.

 

[svk]

Run a few tanks through it to shake out any potential bugs then do the muffler mod. As long as you richen it up enough there is basically zero chance that anything from the muffler mod could hurt the saw.

 

[Jed1124]

Really? How many 590's have setup and tuned?

Enough to know they are generally lean from the factory.