Stihl FS70 problem?

Discussion in 'Mechanic and Repair' started by GreenBlade, Aug 11, 2012.

  1. yardguy28

    yardguy28 LawnSite Platinum Member
    Messages: 4,463

    don't know how good of a dealer you have but I would expect the dealer to work with until the issue is COMPLETELY resolved. even if that means taking the second one back.

    the fact that both of these trimmers aren't even a week old SHOULD be in your favor.

    I wish I could help more because the fs70 is a great trimmer besides the plastic housing design. you have to undo the throttle assembly every time you want to remove the outer plastic shell.

    as I said I haven't had your issue. I use 87 octane with the grey 2 gallon mix.
  2. GrassGuerilla

    GrassGuerilla LawnSite Bronze Member
    Messages: 1,440

    Ok, I have to know what happened. Happy ending?
  3. tagman9111

    tagman9111 LawnSite Member
    Messages: 108

    I just bought this trimmer about a month ago and I have the same problem. Around the muffler has a lot of oil. I use the same gas (91 octane and stihl hp ultra) in my stihl blower and no problems. I'm going to contact the dealer to see what they say.
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  4. burtle

    burtle LawnSite Senior Member
    Messages: 317

    I have the same trimmer. There's a little oil but nothing like yours. I've used mine about 10-12 times. Runs great. I think the amount mine has is normal wear and tear.
  5. crankincraig

    crankincraig LawnSite Member
    Messages: 204

    Could it be possible that the Stihl ultra oil being fully synthetic is not allowing the rings to seat properly? I know on c 4 cycle engine that most of the time synthetic oil is not recommended during break in , Kohler for example recommends 50 hours.
  6. tagman9111

    tagman9111 LawnSite Member
    Messages: 108

    Not sure. I used the same mix on the bg86 blower and no issues like this whatsoever.
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  7. ed2hess

    ed2hess LawnSite Fanatic
    Messages: 14,369

    Good answer and they need to stop using that high octane gas. Get red armour and try it.
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  8. GlynnC

    GlynnC LawnSite Senior Member
    Messages: 913

    Okay, I'm embarrassed! I am so so picky on my fuel mix--93 octane non ethanol gas, very precise measurements, always fresh fuel mix, major brand of oil, mixed at 50:1---or so I thought! Mixing a fresh batch of fuel today, just for kicks, decided to check everything out. For the last year or so, I've been using Echo Red Armor oil, 2 1/2 gal bottle dumped into my (very precise) 2 gal of gas--been mixing at 40:1.

    Yes mistakes can and DO happen!!
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  9. herler

    herler LawnSite Fanatic
    Messages: 5,139

    We don't fix equipment under warranty, that is why it has a warranty, bring it back to the people who sold it to you, they need to honor said warranty, thank you, have a nice day.

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