Mastermind Meets The Echo CS-355T

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Mastermind

Work Saw Specialist
Joined
Nov 21, 2009
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Location
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I've had this saw sitting here in the box for a few weeks now. I hoped to have the Echo CS-610EVL done before I started this one, but it ended up needing an oil line and that stalled us again on it.

I really want to be able to take some time to do a through job on dissecting this little bugger......it has loads of potential.

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It's a well designed unit.....fits in the hand very naturally. Jon ran it for a few minutes and decided he needed one. Up till now the Stihl 200T has been the only top handle saw that has interested him at all.

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I think this is Jon's way of saying we have voided the warranty. :laugh:

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This is a non strato, clamshell designed saw that's very light and nimble. We ran it several minutes and were impressed as hell with the snappy throttle response and power that it has.

Jon's stripping her down so we can see what the designers gave us.

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Spur drive here......I would like to see a rim instead but who am I?

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I'm really liking the side exit exhaust. The way this was achieved is total genius on the part of the designer......I like the oil pump drive too.

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Here's a couple of shots of the exhaust outlet.........simple and efficient.

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Nothing out of the ordinary here.

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:popcorn: I'm fond of the smaller saws or the "pecker pole prunners" as my logger friend refers to them.
 
I've been in a lot of saw engines.....but this is the first time I've seen crank stuffers in a clamshell.

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I bet transfer velocity is smoking fast on the thing. Now wonder it's so snappy.

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Now here's something that caused me to stop and stare for awhile......

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Note that the ports are not centered with the crankshaft in the "normal" manner.

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Big damn pistons in these huh? Notice that it doesn't have a cheesy stamped rod?

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There's that offset again.......

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These were the little buggers that made me scratch my head......I wondered why they crammed these in the transfer tunnels.

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I also wonder what happened to my camera settings. :laugh:

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I'm using a different camera and a lot of my pics of the porting didn't come out very well......here's a few more that did.

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These were the little buggers that made me scratch my head......I wondered why they crammed these in the transfer tunnels.

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I also wonder what happened to my camera settings. :laugh:

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them and the stuffers to keep the velocity up ???????

don't mind me just thinking with no knowledge
 
I didn't want to disturb the flow velocity of this tight design too much so I just opened the entrance to the auxiliary transfers some and widened the uppers. The intake was widened and lowered a bit and the exhaust was raised a fuzz and widened. For got muffler pics but it's an open can so modding it is a breeze.

I don't think we should widen this any more at all......

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So you agree that throwing hem away would be a mistake? :msp_biggrin:

Yep... figure out how to open the intake earlier to take advantage of the velocity. An earlier opening also means decreased velocity as the charge may not build to its full potential.... but you should see larger volume.... and more power!
 

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