« previous next »
Pages: [1]   Go Down

Author Topic: Echo Trimmer Carb Tune Troubles  (Read 387 times)

0 Members and 1 Guest are viewing this topic.

Offline rayvil01

  • 5 cube
  • ***
  • Posts: 137
  • Karma: 19
Echo Trimmer Carb Tune Troubles
« on: April 09, 2015, 11:29:53 am »
I'm working on a 21.2 CC Echo string trimmer.  It's a Zama carb.  I've worked on a few of these carbs lately.  But, this one is kicking me around a bit.  Standard ethanol issues.  After rebuilding the carb it runs...but it's very rich and won't idle completely.  I can completely close both High and Low screws and it makes no difference.  It runs the same way.  The adjustment screws are having no effect.   Starts fine.  But, something's amiss. 

Any thoughts?  Thanks in advance. 
Logged

Share on Facebook Share on Twitter

Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6437
  • Karma: 249
  • For The Love Of Chainsaws
  • Location: NCO
Re: Echo Trimmer Carb Tune Troubles
« Reply #1 on: April 09, 2015, 11:44:52 am »
To miss-place the regulator diaphragm and gasket will cause this.

On the regulator side of the carburetor the gasket goes against the carburetor body and the diaphragm goes against the steel cover.

at any rate something is holding your metering valve needle and seat slightly open? The lever is bent or out of place with relation to the diaphragm and the needle of the valve
Logged
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline aclarke

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172
Re: Echo Trimmer Carb Tune Troubles
« Reply #2 on: April 09, 2015, 01:01:24 pm »
Leaky Welch plug?
Logged

Offline rayvil01

  • 5 cube
  • ***
  • Posts: 137
  • Karma: 19
Re: Echo Trimmer Carb Tune Troubles
« Reply #3 on: April 09, 2015, 03:54:38 pm »
Quote from: 660magnum on April 09, 2015, 11:44:52 am
To miss-place the regulator diaphragm and gasket will cause this.

On the regulator side of the carburetor the gasket goes against the carburetor body and the diaphragm goes against the steel cover.

at any rate something is holding your metering valve needle and seat slightly open? The lever is bent or out of place with relation to the diaphragm and the needle of the valve

Excellent call.  The lever was bent up.  Straightened it and she's got manners. 

Thanks for the replies.  I appreciate it.  The willingness to share knowledge here is tremendous.
Ray
Logged

Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6437
  • Karma: 249
  • For The Love Of Chainsaws
  • Location: NCO
Re: Echo Trimmer Carb Tune Troubles
« Reply #4 on: April 09, 2015, 05:59:35 pm »
Glad you got it going
Logged
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .
Pages: [1]   Go Up
« previous next »
 

Related Topics

  Subject / Started by Replies Last post
7 Replies
1059 Views 		Last post July 24, 2012, 03:35:33 pm
by Cut4fun .
54 Replies
1719 Views 		Last post September 17, 2013, 09:34:04 pm
by kr5258
8 Replies
501 Views 		Last post December 11, 2013, 01:06:18 pm
by Magnus
29 Replies
1616 Views 		Last post May 14, 2014, 11:33:15 pm
by Jason K
4 Replies
451 Views 		Last post March 30, 2015, 07:46:52 am
by rayvil01
3 Replies
529 Views 		Last post June 30, 2015, 07:11:44 pm
by Jason K
1 Replies
446 Views 		Last post December 23, 2015, 09:16:24 pm
by Cut4fun .
10 Replies
607 Views 		Last post March 28, 2017, 02:27:13 pm
by Giles
3 Replies
290 Views 		Last post July 01, 2019, 12:47:31 pm
by The Ripper
4 Replies
777 Views 		Last post May 15, 2020, 07:11:28 am
by Cut4fun .