ECHO Echo, Echo, Echo

[Mastermind]

We just did a base gasket delete, muffler mod, and timing advance on one of those. Runs pretty well.

 

[FergusonTO35]

It's a clamshell, so what would the base gasket delete do for it?

 

[Mastermind]

It's a clamshell, so what would the base gasket delete do for it?

The saw we just did is a CS-490. My mistake.

 

[Woodtroll]

Ok, I think I've figured it out! See the flanged bushing inside the oil pump drive?

View attachment 469557

It is supposed to have the flange on the inside!

View attachment 469558

If you install it with the flange on the outside, the flange will contact the clutch shoes, thereby also turning the clutch drum! I reassembled it, and now it idles down to 2800 rpm without the chain turning. I don't remember ever taking that part out of the saw, but maybe I did at some point. Never too old to learn something new!

Glad that you figured it out, and that it was a cheap fix!

 

[STOVE]

I guess I’m a bit of an echo fanboy of sorts. All of my small engines outside of a hand me down homlite blower are echo.

I used my 590 yesterday to clear a large oak limb off a tractor. It’s amazing how easy all my echo stuff cranks. The carb is a little finicky but that’s what you get when you mess with stuff instead of leaving it factory.

I’m sure my 590 is not a compression monster but I can’t recall the last time any of my stuff took more than 3 pulls.

 

[FergusonTO35]

Thanks!

 

[old saw fixer]

I gave my grandson (18 yoa) a CS-400 for his first saw. I like the saw and intend to mod the muffler one day.

 

[FergusonTO35]

You're a good grandpa, and I bet he will use it for decades to come!

 

[old saw fixer]

I wish that I had bought two CS-400 saws, I'd like to have one in my collection!
Not that I need another saw...

 

[STOVE]

I wish that I had bought two CS-400 saws, I'd like to have one in my collection!
Not that I need another saw...

They pop up used around me all the time. Cannot seem to find any decent older husky or Stihl stuff to rehab. But loads of smaller echos.

There is a parts saw on my dealers back room shelf I thought about grabbing just for teardown practice

 

[FergusonTO35]

I wish that I had bought two CS-400 saws, I'd like to have one in my collection!
Not that I need another saw...

They come up on Fleabay all the time, that's where one of mine came from. FB Marketplace, Craig's List, and pawn shops are also good places to look.

 

[STOVE]

Getting ready to re-do my 590 muffler. My first one was cool at first, but I cannot take the sound anymore. It’s poppy, and just too much. Going to keep the top deflector mod that everyone does but change up the openings

Which of these three offers the best performance without terrible acoustics


Option 1 is adding openings to the side walls similar to the below photo I found in another thread

Option 2, west coast power port 7/8 size. On the clutch side, similar to another members photo

Option 3, west coast power port 7/8 size on top, where I have colored in red

 

[EFSM]

I have only done option 1 on those saws. The other option is to start with a 620 muffler; they have a much more open inner baffle and flow much better stock.

 

[STOVE]

Option 1 is free, the other two will cost either $45 if I go west coast 7/8 route. Or go with a @Red97 cut it yourself and figure my own attachment.

Already have $65 in the muffler, hard to stomach another $45. I just need the flow without the poppy sound

 

[STOVE]

Getting the 590 dialed in. Dukes chain, sharpened a little too aggressive from what I have read. Timing advance, MM, carb nozzle fixed, gearhead air filter seal

Feels like I’m hitting the limiter , still training my ear. Mid 1200 with the cheap Amazon tach

 

[STOVE]

Getting the 590 dialed in. Dukes chain, sharpened a little too aggressive from what I have read. Timing advance, MM, carb nozzle fixed, gearhead air filter seal

Feels like I’m hitting the limiter , still training my ear. Mid 1200 with the cheap Amazon tach

Is she turkey bacon, regular bacon, or fatback?

 

[mainer_in_ak]

Youre not anywhere near the rev limiter. Too much ignition timing. I can hear it in the cut, cackling. If it's one of those goofy gear head offset keys, take it out and use your original flywheel key. With a pair of calipers, only remove .015 off the key.

Make sure the gas is fresh stuff, 90 octane or better mixed at 32:1.

 

[STOVE]

Youre not anywhere near the rev limiter. Too much ignition timing. I can hear it in the cut, cackling. If it's one of those goofy gear head offset keys, take it out and use your original flywheel key. With a pair of calipers, only remove .015 off the key.

Make sure the gas is fresh stuff, 90 octane or better mixed at 32:1.

It is the gearhead key, going to have to track down the original. I was more so trying to get the high setting correct.

 

[EFSM]

If you’re looking for top performance, the OG cs-600p had the farthest advancing coil of any saw in that chassis. There is no exact rev limiter on your saw’s coil—it simply retards the timing drastically past a certain point.