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Stihl KS-61 No Start Issue

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2025/06/08 18:57:12 (permalink)
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Stihl KS-61 No Start Issue

I have a Stihl FS61 string trimmer that I found recently for free on the side of the road. I tried to start it when I got home, but it only started when gas was poured in the carb, and it only ran for a couple seconds. I purchased a new carb, but still the exact same problem. I did a compression test which read about 170 PSI. I also made sure that gas is flowing to the carb. If anyone has ideas on how to get this thing running, it would be much appreciated. Thanks!
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    SRTsFZ6
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    Re: Stihl KS-61 No Start Issue 2025/06/09 10:12:54 (permalink)
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    I assume it's an FS 61 not a KS61?
     
    https://www.diyspareparts.com/parts/stihl/diagrams/fs-61/  
     
    I'd pull the muffler screen (spark arrester) and check that it's NOT CLOGGED with CARBON.
     
    If that's ok, try another known good spark plug. While speaking of spark, you may want to pull the flywheel and check that the key is still intact and timed correctly with the crankshaft.
     
    I attached a link for your machine.  Stihl diagrams are hard to come by so save it for later use..
     
    Pz post back how it goes..
     
     
    .

    Scott
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    Re: Stihl KS-61 No Start Issue 2025/06/09 21:22:38 (permalink)
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