stihl fs90 died suddenly wont restart

Discussion in 'Mechanic and Repair' started by johnyredd99, Aug 18, 2011.

  1. johnyredd99

    johnyredd99 LawnSite Member
    from gap,pa
    Posts: 163

    Have an older fs90. used but maintained. was clearing an area with it today and it just died. Tried but couldnt get it restarted. had to get back up echo to finish job....what fun.

    Since I got home things I have to done to try and start are....
    New plug... and checked yes I am getting a spark
    New fuel filter
    Cleaned exhaust filter
    Starter fluid wont even get her to putter

    Would rather not have to take into repair shop I have larger jobs lined up and depend on WW to do its job.

    Any help Please and Thank You
     
  2. johnyredd99

    johnyredd99 LawnSite Member
    from gap,pa
    Posts: 163

    correction its an FS80r not the 90
     
  3. waters lawn care

    waters lawn care LawnSite Member
    from alabama
    Posts: 128

    I would try cleaning the carb I have one of my stihl trimmers that I have to tear down at least twice a month. When the carb is cleaned runs fine for a while.
    Posted via Mobile Device
     
  4. johnyredd99

    johnyredd99 LawnSite Member
    from gap,pa
    Posts: 163

    when you have your issues will the machine go from running full throttle to just dead? or would it gradually run worse and worse? Mine went from wide open to dead. Sprayed starter fluid into spark plug hole and tried to start w/ not even a sputter. Wouldnt going thru spark plug bypass the carb
     
  5. waters lawn care

    waters lawn care LawnSite Member
    from alabama
    Posts: 128

    It should try and hit. Make sure you still have good compression. Be careful with starting fluid don't want to wash cylinder down. If the spark is not hot enough it will not hit either. These can be a pain to deal with.
    Posted via Mobile Device
     
  6. johnyredd99

    johnyredd99 LawnSite Member
    from gap,pa
    Posts: 163

    thanks going to go and give it a try again
     
  7. taxidermist

    taxidermist LawnSite Member
    Posts: 49

    Pull the muffler and look at the piston for scoring. You might have had it go lean and score the piston.

    Rob
     
  8. johnyredd99

    johnyredd99 LawnSite Member
    from gap,pa
    Posts: 163

    adjusted low speed on carb and started right up. although this cause alot of down time and was a pita. not having to pay to drive to repair shop, pay for adjustment, pay to drive home is great. research, time, and help from forums like this made this a free pita success.... thank you
     

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