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Stihl Back Pack Blower 340 Problem

Discussion in 'Mechanic and Repair' started by statman, May 12, 2007.

  1. statman

    statman LawnSite Senior Member
    Messages: 268

    This is just a couple weeks old, and is losing power real bad. Any Ideas what it could be?
  2. ChadsLawn

    ChadsLawn LawnSite Bronze Member
    Messages: 1,110

    Take it back to the dealer... Its still under warranty.. Could be clogged exhaust port.
  3. PerfectEarth

    PerfectEarth LawnSite Bronze Member
    Messages: 1,734

    reset your carb adjustments. Maybe?? Pretty easy on all Stihl's.... Or take it back to the dealer for a checkup, Hell, you just bought it.

    Just some advice- I like to run a whole tank of fuel through a stihl before I use it (new blower, saw, trimmer, whatever) at full throttle. Just let it sit there and run. It's a good engine break-in.
  4. AndyTblc

    AndyTblc LawnSite Fanatic
    Messages: 5,480

    Why did you get the 340, I didn't think they were still making them.
  5. statman

    statman LawnSite Senior Member
    Messages: 268

    Clogged exhaust screen, thanks!
  6. ed2hess

    ed2hess LawnSite Fanatic
    Messages: 13,842

    That don't seem possible in two weeks? You better look at what kind of oil mix you are running.
  7. topsites

    topsites LawnSite Fanatic
    Messages: 21,653

    You really need to run a name brand premium fuel as well, 93 octane.
  8. scottp

    scottp LawnSite Member
    Messages: 21

    FYI - Not sure if you replaced the spark screen or left it off, but a quick easy fix to that is remove it from blower, grab it with a needle-nose pliers and burn up the carbon with a torch. Works great.

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