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Echo cs 590 base carburetor settings

Discussion in 'Ask the Experts' started by pignacious, Mar 12, 2020.

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  1. pignacious

    pignacious New OPE Member

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    I have a saw that came to me in pieces, including the carburetor. It was easily put back together, but the adjustment screws had been removed. I've seen posts talking about starting anywhere from 1/4-1 1/2 turns from seated on the L screw and 1/4 to 1 on the H. I've rebuilt many carbs, but this one has been the most aggravating because of the lack of consistent information.
    Thanks in advance
     
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  2. cuinrearview

    cuinrearview sierra roja amante

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    I have never worked on a 590, but if I were in your shoes I'd crank the idle screw in and start both needles at one turn out from lightly seated.
     
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  3. AVB

    AVB Super OPE Member

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    Would this help?
    [​IMG]
    NOTE 2: Turn Idle Speed Screw CW or CCW until screw tip just touches throttle plate, then turn CW the specified number of turns.
    NOTE 5: WARNING! During Warm up DO NOT exceed Maximum RPM listed to prevent engine damage from over-revving.
     
  4. David Young

    David Young Safety First !!!!!! Staff Member

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    Wow that’s some solid info. Good on ya.
     
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  5. AVB

    AVB Super OPE Member

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    It just an extraction of the Echo NA carburetor setup guide that a dealer friend sent me as I was bugging him a lot for equipment tune-up setups as he knew I tuning the equipment to factory specs.
     
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