Author Topic: CS400  (Read 556 times)

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Offline brettl

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CS400
« on: February 08, 2014, 09:49:50 pm »
Think I got screwed on a swap for this one. WHEN it starts, it dies in the first 5 or 10 seconds. Acts like it's sucking air and leaning out. Piston scores very visible but can just barely feel them. Cylinder has marks to. Question is, what's the minimum compression before it's toast? Gets to 90psi with 3 pulls. That seems awful low to me.
Sthil Man. 011AV, 015, 020, 020, 024, 025, 026, 028 WB(2), 028AV, 028 Super, 029 Super(2), 039, 041, 192TC, 200T, 250, 260, 390, 440, 441

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Offline brokenbudget

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Re: CS400
« Reply #1 on: February 09, 2014, 05:58:00 am »
3 pulls isn't telling you anything. you pull until the number doesn't go up anymore. 90 would be the bare minimum.
regardless of compression. sounds like you have much bigger problems. I wouldn't run it until you get either the tuning or airleak issue figured out and ruined parts clean up.
when I grow up, i wanna be an adult.

Offline mountainlake

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Re: CS400
« Reply #2 on: February 09, 2014, 11:32:17 am »
 Pull the limiter caps and adjust richer.   Steve

Offline brettl

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Re: CS400
« Reply #3 on: February 09, 2014, 05:10:32 pm »
Thank you for the replies. I should have been more clear in my op, Brokenbudget. After 3 pulls, I can pull a dozen more times but it doesn't go past 90. I can't see any scores on the piston skirt from the intake but definite scores on it through the exhaust port. I'm hoping the cylinder doesn't have similar scoring but it seems to stand to reason that it will. From what I've read of this saw, I think it will be worth repairing. Thanks again
Sthil Man. 011AV, 015, 020, 020, 024, 025, 026, 028 WB(2), 028AV, 028 Super, 029 Super(2), 039, 041, 192TC, 200T, 250, 260, 390, 440, 441

Offline Cut4fun .

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Re: CS400
« Reply #4 on: February 11, 2014, 08:29:31 pm »
I like to see a min of 120psi
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Offline sharkey

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Re: CS400
« Reply #5 on: February 12, 2014, 02:08:29 am »
Specs show a minimum of 130psi static compression to run right.  Good would be more like 150psi.  Sounds like you need a piston and cylinder. 

Short block includes the crank;
Echo SB1100 (replaces SB1089)

P&C w/o crank, seals and related; Echo P021010574 and Echo P021036520.   

Offline brettl

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Re: CS400
« Reply #6 on: February 12, 2014, 03:35:16 pm »
Yeah I think it's going to need a piston and rings and probably a cylinder. I swapped a rc plane I had maybe $50 invested in but could have sold outright for $125. Now I've found another CS400 in great running condition with case and extra chains for $200. Don't know whether to be happy and buy it or pissed off at myself about the trade, think I'll do both ;D.
Sthil Man. 011AV, 015, 020, 020, 024, 025, 026, 028 WB(2), 028AV, 028 Super, 029 Super(2), 039, 041, 192TC, 200T, 250, 260, 390, 440, 441

Offline sharkey

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Re: CS400
« Reply #7 on: February 14, 2014, 07:39:13 am »
How does that old saying go, something like; sometimes you get the bear and sometimes the bear gets you? 

Maybe the cylinder will clean up and you can get away with just a piston.  I know the cylinder plating is pretty tough on the small echos.  I wouldnt try to run it anymore untill you take it down and look.     

Offline fordfairlane78

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Re: CS400
« Reply #8 on: May 20, 2014, 03:48:16 am »
Pull the limiter caps and adjust richer.   Steve
I have done a lot of work on these Home Depot specials....they are extremely lean out of the box. ..like barely running lean. ....if some one used it for more than just limbing it is not a surprise that it is chewed up inside.  Typically though I have been able to get away with a bit of smoothing on the piston and a new ring.A little muffler work goes a long ways with these as well.
Trapped in time, surrounded by evil, low on gas

 

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