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Sthil 420

Discussion in 'Mechanic and Repair' started by anj, Jul 5, 2007.

  1. anj

    anj LawnSite Member
    Messages: 167

    I Have The Sthil 420 Blower. I Have Only Had It For About A Year. It Dosent Seem To Be Blowing Full Power. It Seem To Sputter When I Use It. I Checked The Filter And Its Clean. Anyone Have Any Ideas What This My Be?
  2. zak406

    zak406 LawnSite Bronze Member
    Messages: 1,516

    spark arrestor pull it out its the screen thing on the end of the exaugst pipe
  3. Taylor Yardworks

    Taylor Yardworks LawnSite Member
    Messages: 12

    Warm engine, adjust idle speed first, then hold throttle wide open and adjust high rpm screw to get the highest rpm, then let idle, then hold throttle wide open for a second and let go and then do it again...if it doesn't hesitate then you're good to go!
  4. ed2hess

    ed2hess LawnSite Fanatic
    Messages: 14,442

    I think we have a winner.....those darn things catch me all the time...still don't understand why I don't take all this junk off immediately.
  5. anj

    anj LawnSite Member
    Messages: 167

    Hey Guys I Fill Like A Nut. The Newer 420 Carb Cant Be Adjusted Its Preset At Factory. I Took The Thing Into The Shop And All It Needed Was A New Filter. I Spent $35 + Parts For Nothing. I Also Noticed After Running With The Flame Arrestor Out It Was Melting The Plastic Where The Little Tube Stick Out.
  6. walker/redmax

    walker/redmax LawnSite Senior Member
    Messages: 366

  7. ed2hess

    ed2hess LawnSite Fanatic
    Messages: 14,442

    Carb can be adjusted....pull the plastic stops out and throw them away....someday after the units gets much older you will need to adjust the carb. Don't take stops out until you need to adjust....
  8. anj

    anj LawnSite Member
    Messages: 167

    I Almost Did That Glad I Didnt. Thanks For Info.

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