Mastermind Meets The Echo CST-610EVL

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Mastermind

Work Saw Specialist
Joined
Nov 21, 2009
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Location
Tennessee
That's right ladies and gentlemen.....we have a sweet looking Echo CST-610EVL twin cylinder chainsaw here to work on. The owner thought this would be a fun project and I agree completely.

Echo610EVL001.jpg


Even though this is a twin cylinder saw it's displacement is only 61cc (3.72 cu. in.). It uses horizontally-opposed simultaneous firing with cylinders in the front and rear. Bore is 38mm and stroke is 30mm.

I made two cuts with the saw and felt it was way underpowered. I suspected internal problems so I didn't run it enough to take any before video.

Here's some pictures as I was tearing it down.

The air filter has flocking on the top but is mesh on the bottom. I can't see it being a restriction.

Echo610EVL002.jpg


The carburetor is a Walbro HDA.

Echo610EVL003.jpg


This plug pops out to access the front spark plug.

Echo610EVL005.jpg


Echo610EVL004.jpg


The rear plug is in the "normal" location.

Echo610EVL006.jpg
 
i really want to see how this turns out, i had one of these, but sold it mainly because of it being underpowered for it's size and for being a twin, thought it would run better than it did, oh well
 
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Under the recoil.....boxer style.

Echo610EVL008.jpg


Looks like a well thought out air shroud setup....air forced past the cylinder fins exits here. There's a grill cast into this area of the front cover.

Echo610EVL009.jpg


Echo610EVL010.jpg


Echo610EVL011.jpg


Echo610EVL012.jpg


Looks like we will be needing av parts.....

Echo610EVL013.jpg
 
Here's a few more pics.....

Echo610EVL021.jpg


Echo610EVL022.jpg


Echo610EVL023.jpg


I sent the owner a PM.....so we are waiting the see where we go next. I've found the piston kits for 70.00 a pop. The jugs will clean up easily. I'm thinking new seals, gaskets, and pistons.....
 
thats a different looking powerhead for sure ,hows parts availibilty ?
 
Yes thev twin was always underpowered a real dissappointment pity they had the capacity so small now 120cc might have been a different story

McBob.

or cdi my twin has a crook ignition on one end and i was hoping a module might help get it running ?
 
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I want some.....gotta love bacon!!!

Did you really have to ask the owner, BUILD IT!:rock: Show Bradley it can be done.:msp_tongue:

Almost have a pile of saws ready to send you;)

Shea

I always give the owner a heads up........I would want one too. I'm sure he'll want to go for it.....

Send em. :rock:
 
good job randy,,, this will be an interesting build,, i never seen the inside of one of those personally
 
So are Pm's not working cause over the last week I have sent several different members pms and havent gotten a single response from any of them. And I am sure they are not avoiding me bc the pms are regarding their financial gain/ my loss. :msp_razz: Just trying to figure it out. Anyone else having trouble pm'n? :msp_confused:

Im signing off, I'll check back in tomorrow night.
 

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