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Tips on stihl 4 mix engines

Discussion in 'Lawn Mowing' started by S man, Nov 15, 2006.

  1. S man

    S man LawnSite Gold Member
    Messages: 3,562

    I wrote to stihl about my 4 mix product and got a call the next day. I learned some valuble information on the 4 mix engine. The guy told me to run only synthetic stihl 2 cycle oil and run it a littler leaner than rich. I've been using echo power blend and was told that's a no no. Maybe some of you on here that have had bad experiences with the 4 mix might have been using bad oil and gas which greatly affect the engine. How have everyone's 4 mix engines been running?
  2. TheLawnBarber

    TheLawnBarber LawnSite Senior Member
    Messages: 539

    I run Stihl 4-mix as well and have used the Echo powerblend oil. I've been using it in my units for about a year now. Theres been no issues so far for me.
  3. wriken

    wriken LawnSite Silver Member
    Messages: 2,154

    the br600 I had for a short time, was running to what the tech's from stihl told the person at the dealership I bought it from, right rpm's etc. It just did'nt produce enough air out the tube. I did'nt use stihl oil.
  4. ed2hess

    ed2hess LawnSite Fanatic
    Messages: 14,460

    So what kind of problems will be prevented by running it lean? Is this a solution for not have an adjustable carb?? And how did he suggest you mix this special blend?
  5. Just Mow

    Just Mow LawnSite Senior Member
    from Texas
    Messages: 367

    I use the Stihl HP oil and have not had any problems. The 600 does have adjustable carb. I don't understand why they told you to mix it lean.
  6. jcltyson

    jcltyson LawnSite Member
    Messages: 97

    I've used Stihl and Husqavarna in my 4-mix Stihl FS 130 trimmer. Both seem to work fine. Starts quick and has good power at high rpm.
  7. mowerman90

    mowerman90 LawnSite Bronze Member
    Messages: 1,491

    So......did you expect the Stihl Rep to reccommend any oil other than Stihl?
  8. ThirdDay

    ThirdDay LawnSite Senior Member
    Messages: 442

    Carbon build up in the new 4 mix engines have been the major problem according to my dealer. Stihl has come out with a decarbonizing cleaner that you need to use periodically to keep the 4 mix enignes clean. Nice!
  9. jbell113

    jbell113 LawnSite Senior Member
    Messages: 654

    I use low octane gas ( i know a no no) and echo oil and my stuff runs fine.
  10. Richard Martin

    Richard Martin LawnSite Fanatic
    Messages: 14,699

    I mostly use Amsoil at 80:1 but have been known to use Shindaiwa at 50:1 when I ran out of Amsoil. I've been using it in a BR600 for over a year now with no problems.

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