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carbon build up on stihl back pack blower

Discussion in 'Mechanic and Repair' started by jlc31, Nov 3, 2003.

  1. jlc31

    jlc31 LawnSite Member
    from ohio
    Messages: 16

    i have a problem with carbon build up on my stil back pack blower can anyone help?
  2. bruces

    bruces LawnSite Senior Member
    Messages: 648

    Remove the spark arrestor screen and use Opti-2 2 cycle oil for your mix.
  3. olderthandirt

    olderthandirt LawnSite Platinum Member
    from here
    Messages: 4,899

    Same problem and fixed it exactly like Bruce said
  4. Barkleymut

    Barkleymut LawnSite Bronze Member
    Messages: 1,117

    You may have to take the muffler off to scrape the entire port. It really is easy but you have to be very careful to not touch the piston. Also, I do it so the exhaust port is pointing towards the ground so no carbon goes into the cylinder. One more bit of advice, when reattaching the muffler do NOT overtighten the bolts or else you will have to use helicoils to redrill the holes (no fun at all). Good luck
  5. lawnGUYnMD

    lawnGUYnMD LawnSite Member
    Messages: 72

    Just like the other post said you have to use quality mix and remember different gas stations have somewhat different gas.
  6. locutus

    locutus LawnSite Bronze Member
    from NC
    Messages: 1,266

    Remove the spark arrester screen and switch to Amsoil 100:1 premix but, run it at an 80:1 ratio. Your problem will disappear.:p
  7. idugaholez

    idugaholez LawnSite Member
    Messages: 42

    All my small engines that are a mix do that. Once in a while, you have to take off the screen, and take a plumbers torch to it. It will burn off the carbon. It only takes a couple of seconds, and then it runs great.

  8. dishboy

    dishboy LawnSite Fanatic
    from zone 6
    Messages: 5,892

    clean port, use amsoil. I mix at 50 to1 2.6 oz per gal.
  9. crawdad

    crawdad LawnSite Bronze Member
    Messages: 1,938

    What brand of oil have you been using?
  10. Avery

    Avery LawnSite Bronze Member
    Messages: 1,389

    Yep. Lose the screen. Take it off every piece as soon as you get it and run quality oil. Easy problem to fix.

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