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Author Topic: Echo 590  (Read 7357 times)

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Offline Cut4fun .

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Re: Echo 590
« Reply #60 on: June 19, 2018, 01:40:10 pm »
Before after with scored piston and 140psi

https://youtu.be/0PNTXcwVXXo
https://youtu.be/rZLBQ-Alq3c
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Offline Cut4fun .

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Re: Echo 590
« Reply #61 on: June 19, 2018, 02:15:54 pm »
Going off videos uploaded to puter HD.

Before with carb stops removed.  3.25 2.94 2.90

After muffler mod.   2.84 2.78 2.75
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Offline Cut4fun .

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Re: Echo 590
« Reply #62 on: June 19, 2018, 05:00:41 pm »
 590 piston kit and gasket ordered. Thanks Nate.
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Offline stubnail67

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Re: Echo 590
« Reply #63 on: June 19, 2018, 05:52:15 pm »
Sorry to hear about the scored piston.....I check mine on even brand new saws now before i run them.....especially if i buy off ebay new.....good videos........you going to juswt clean up the piston and put ne rings on it?
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Offline Cut4fun .

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Re: Echo 590
« Reply #64 on: June 19, 2018, 09:40:17 pm »
Quote from: stubnail67 on June 19, 2018, 05:52:15 pm
Sorry to hear about the scored piston.....I check mine on even brand new saws now before i run them.....especially if i buy off ebay new.....good videos........you going to juswt clean up the piston and put ne rings on it?


Cylinder will clean up. Piston I could have. But being I was going to sell this saw. Ordered new piston kit and base gasket from Nate.

Anyone know what the norm is on psi on these stock with base gasket in?   Have pics of tear down that I will load tomorrow.  Like the cylinder design.
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Offline stubnail67

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Re: Echo 590
« Reply #65 on: June 20, 2018, 12:29:09 am »
No idea i have been without a compression gauge for a long while now.... i kinda go by how they feel and try to always look at any piston through the muffler when i buy a saw even new.....makes me feel better.....How much of a muffler mod did  you do i only cut out the top deflector and left the muffler hole stock ...will be looking forward to seeing your tear down....Sorry to hear it was scored ......there was a guy in another part of florida i seen his tree srvc  they are a bigger one and he said he was blowing them up or his crew was......it was on one of the FB chainsaw sites maybe even yours.....?think it was tree doctors? making me glad i set mine so rich for break in....
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Offline Cut4fun .

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Re: Echo 590
« Reply #66 on: June 20, 2018, 07:48:16 am »
Quote from: stubnail67 on June 20, 2018, 12:29:09 am
...How much of a muffler mod did  you do i only cut out the top deflector and left the muffler hole stock ...will be looking forward to seeing your tear down....Sorry to hear it was scored ......there was a guy in another part of florida i seen his tree srvc  they are a bigger one and he said he was blowing them up or his crew was......it was on one of the FB chainsaw sites maybe even yours.....?think it was tree doctors? making me glad i set mine so rich for break in....

Last page I showed the muffler mod I did with pics. 
Showed 2 videos first of min and max mm. I went with a in between those 2.  I did open up the back side bypassing tube.
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Offline Cut4fun .

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Re: Echo 590
« Reply #67 on: June 20, 2018, 08:08:45 am »
First echo 590 I have tore into. Interesting lay out. Had to pull tank to get to the t27 bolts for intake boot. If I had a small 90 degree could have done it without pulling tank down. Is there a easier way?
Also what is the normal psi on these? This one was pulling 140psi and ran pretty dang good still. I never pulled the muffler till yesterday to muffler mod. So could have been scored from being to lean since I got it from owner that bought it new. I just pulled the plastic stops last weekend to fine tune it. Domed piston. Like the cylinder layout too.

few pics showing

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Offline Cut4fun .

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Re: Echo 590
« Reply #68 on: June 20, 2018, 08:57:39 am »
Note to self. Pull intake boot and cylinder as a whole.   My brain fart yesterday.  Thanks Joe.

collar 10 V356000440
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Offline Cut4fun .

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Re: Echo 590
« Reply #69 on: June 20, 2018, 10:13:55 am »
The plug was perfect colored when pulled from saw too.  Also what makes me think it happened before I got it.  Dont matter now, is what it is.

echo 590 piston specs  per Nate POE website  https://performance-outdoor-equipment.myshopify.com/products/echo-piston-kit-p021038790

Echo Piston Kit P021038790

pin diameter= 11mm
width between pin bosses=17.54mm
total height of piston= 40.85mm
compression height=24.85-5.5=19.35mm
ring thickness= 1.5mm
total height of piston=42mm
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