Stihl FS80 carb identification

Discussion in 'Mechanic and Repair' started by scottt, Apr 12, 2014.

  1. scottt

    scottt LawnSite Senior Member
    Messages: 269

    I have a FS80 from about 2004 that hasn't run in years. I sold my landscape business several years ago and kept this trimmer in case I needed it one day. A couple of years ago I had a local shadetree mechanic look at this trimmer and he couldn't get it to run. I decided to see what I could do and was going to start with a carb rebuild. The problem I'm having is the carb says Zama S69A, but I can't find the S69A listed anywhere for the FS80. None of the FS80 Zama rebuild kits mention S69A and the Zama website says the carb was for a Stihl 4137 emu trimmer. I hate to be pessimistic but when I saw this I thought maybe the mechanic put the wrong carb back on my trimmer. I hope that's not the case and I'm just not looking for info in the right place. Any thoughts? I didn't find S69A anywhere on a lawnsite search.
  2. andy35321

    andy35321 LawnSite Member
    from georgia
    Messages: 193

    Stihl had s69a on their trimmers. I had a fs80 and it had a zama s69a on it. It uses rb-100 rebuild kit.
    Posted via Mobile Device
  3. herler

    herler LawnSite Fanatic
    Messages: 5,139

    It needs a brand new carburetor, and the gasket, maybe the fuel lines and the filter too.
    Kit ain't gonna fix nothing but waste more time.
    hort101 likes this.
  4. Patriot Services

    Patriot Services LawnSite Fanatic
    Messages: 14,505

    You probably are money,time and aggravation ahead by replacing the carb. The tiny internal passages are guaranteed to have corrosion that no amount of soaking is going to fix. 25 bucks on fleabay.
    Posted via Mobile Device
    hort101 likes this.
  5. scottt

    scottt LawnSite Senior Member
    Messages: 269

    Do you think a rebuilt one on ebay is ok? They are $25 vs $35 for a new one.
  6. Patriot Services

    Patriot Services LawnSite Fanatic
    Messages: 14,505

    I would spend the extra 10 sheckles.
    Posted via Mobile Device
    hort101 likes this.
  7. scottt

    scottt LawnSite Senior Member
    Messages: 269

    Thanks for the help, I ordered the carb today. I'll probably be making a new post with more questions once the carb is in.
  8. streamlight2

    streamlight2 LawnSite Member
    Messages: 29

  9. jrsavoie

    jrsavoie LawnSite Member
    Messages: 82

    What is a good replacement carb for our old FS80 string trimmers?

    We replaced the jugs and pistons last year.

    The one trimmer seems to run good as long as you hold it wide open. Seems a little hard starting.

    I am going to try and turn up the low idle a little. I'm sure it needs a good cleaning. I'm not good with tiny parts.

    I thought that rather than taking it in for cleaning and adjustment that I am sure it needs, it might be just cheaper and easier to put a new carb on.

    It's over an hour round trip to a shop that I will have work on my stuff.
  10. Modern marvel

    Modern marvel LawnSite Member
    Messages: 120

    If you need fs 80 parts let me know as I have quite a few parts and carbs that are new never had a drop of gas through it. I have a totally rebuilt fs 80 I just completed, if your interested make me an offer.I powder coated the muffler and it's also muff modded with the appropriate readjustments made to the carb because of the modification. IMAG0497.jpg
    Patriot Services and jrsavoie like this.

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