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STIHL 4 mix valve adjustment

Discussion in 'Lawn Mowing' started by WalkerMike98, Dec 4, 2009.

  1. RonAyersMotorsports

    RonAyersMotorsports LawnSite Senior Member
    Messages: 854

    The feeler gauge is less than $1.00

    STIHL GUY LawnSite Fanatic
    from CT
    Messages: 5,226

    i will be adjusting mine in the spring. thanks for the heads up on what tool to get
  3. Roger

    Roger LawnSite Fanatic
    Messages: 5,943

    I have a photo documentary on how I did an FS90R valve adjustment. There are 16 images in the album, with captions on what is happening in each image. I don't know if I did the job right, but the machine ran better, and started better, afterwards.

    If anybody wishes to have the link to the images. ask via PM. Thanks.
  4. blake101

    blake101 LawnSite Senior Member
    Messages: 581

    Do you adjust the valves when the engine is hot or cold? Also when you say snug what is that, I can slide the feeler gauge under the valve and feel a slight grip, not enough to bend the the feeler gauge. Is this correct?

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