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  1. #1
    Silver Member
    Join Date
    Sep 2009
    Posts
    225
    Location
    NE ky

    Default stihl fs 55 rz trimmer wont run wide open, and floods out.

    I have had this thing for almost 10 years with no probs at all till now. It flooding out and not hitting top rpms. Now it will not hardly run. I have cleaned spark arrestor, new plug, cleaned muffler, air filter. Took spark plug off and muffler and made sure no fluid in crankcase. It will start but will not hit hi rpms and will flood out. Carb is next on list but just checking here incase this is a common issue.

  2. #2
    Super Star Member
    Join Date
    Aug 2001
    Posts
    11,500
    Location
    Upper Midwest USA
    Tractor
    JD 4300, JD X485 JD 4x2 Gator, JD 425, JD455

    Default Re: stihl fs 55 rz trimmer wont run wide open, and floods out.

    You said you cleaned the muffler, and that would have been my first guess as to the problem. Are there a couple holes that you can twirl a twist drill bit down through to clean out the carbon? Has usually worked for me.

    Any suspicion of the fuel and fuel mix?

  3. #3
    Veteran Member
    Join Date
    Jul 2005
    Posts
    1,465
    Location
    Southwest VA

    Default Re: stihl fs 55 rz trimmer wont run wide open, and floods out.

    check the fuel filter and the fuel pickup line.

  4. #4
    Platinum Member
    Join Date
    Jun 2010
    Posts
    677
    Location
    w.v.
    Tractor
    ck30 kioti

    Default Re: stihl fs 55 rz trimmer wont run wide open, and floods out.

    At 10 years old,assuming you've done the required maintance on it all along,could be a cracked line or leak in around lines.

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