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Discussion in 'Lawn Mowing' started by Greenkeepers, Jun 9, 2000.

  1. Greenkeepers

    Greenkeepers LawnSite Senior Member
    from NE Ohio
    Messages: 695

    I have a question for you stihl guys out there. Our FS-85 trimmer is very hard to start, it takes about 10 or 15 pulls to start everytime. Once it is running it runs fine. I started out with the carb screws 1 full turn out and adjusted the high side first then idle. Have any of you guys had this problem. Any help would be greatly appreciated. thanks <p>mark
  2. osc

    osc LawnSite Senior Member
    Messages: 502

    Make sure you choke it on the first pull, they are lean running suckers.
  3. OP

    Greenkeepers LawnSite Senior Member
    from NE Ohio
    Messages: 695

    It is, if i prime it about 4 times it will sometimes start on about 5 pulls. I just did a tune-up at the beginning of the season and also cleaned out the carb. I'm sorta leaning towards the carb, maybe it is getting gummed up again or some bad gas? Don't know this is starting to make me mad though.
  4. TGCummings

    TGCummings LawnSite Senior Member
    Messages: 773

    I've had the same problem with mine. I've had the carb rebuilt twice since the beginning of the year, the second time free needless-to-say. I just figured it had something to do with the smog standards imposed on California-sold machines, but now I think it must be a design flaw.<p>Since getting it rebuilt again, however, it's been running smooth...<p>-TGC
  5. trimmer

    trimmer LawnSite Senior Member
    Messages: 293

    I have one that is about a year old and it is hard to start always has been I think I will switch equipment brand now. Sthil are good equipment though I have never had any problems with them and never anything bad about them<br>
  6. paddy

    paddy LawnSite Member
    Messages: 67

    yep, i have the same problem with mine. i'll just live with it till I get another trimmer (probably a FS-200, bicycle, mainly for tiller use). when i have the FS-85 worked on, i guess i'll have the carb rebuilt. is it possible to get non-emmisions carbs?
  7. Firebrand

    Firebrand Banned
    Messages: 32

    This is my second season with my FS85 and I haven't had a hard starting problem. I haven't changed any of the carb settings since I got it. It starts after 2-3 pulls and idles great when warm. I figured I wouldn't mess with the carb settings until I noticed a performance change.
  8. AB Lawn Care

    AB Lawn Care LawnSite Senior Member
    from Ontario
    Messages: 585

    Maby it does have to do with the emissions standers?I live in ontario and only the odd time I will have a hard time starting the fs 85.The only time I hace had a problem with the trimmer is when the spark screen on the muffler plugged up with gunk.I just run with out the spark screen.I know by law you should not remove it but I doubt my clients lawns will burst into flames becouse of that!!!!!:)<p>----------<br>from:Adam<br>AB Lawn Care
  9. yardsmith

    yardsmith LawnSite Senior Member
    from Ohio
    Messages: 628

    hey mark-<br>looks like a few of us have the FS-85.<br>Like firebrand, I haven't had much problem with mine either.<br>1st guess would be new plug & gas; are you using Stihl 2 cycle oil? My gas is a bit on the oily side as far as not exactly 50 to 1; more like 35 or 40 to 1. 1st thing I did after getting it home was to remove the screen in the exhaust, because I don't need california emissions in Ohio. That will help.<br>Bad gas will make it hard to start, or condensation in the tank too. I use a 2 gal. can so it never sits for long without being used up. You seem to have the screw adjustments right; maybe you could also take the carb off & clean the combustion chamber area of carbon & crud.<br><p>----------<br>Smitty ô¿ô<br>
  10. Prime Seasons

    Prime Seasons LawnSite Member
    Messages: 60

    Adam is correct for 80% of the problems with Stihl product-- get rid of the muffler screen. You can't believe how much of a difference it means to remove that blasted piece of screen from the muffler hole.<p>gus<br>

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