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Stihl saws MAX RPM

Discussion in 'Chainsaw' started by Trigger-Time, Nov 10, 2006.

  1. Trigger-Time

    Trigger-Time Guest

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    I have a tach borrowed for a few days and want to set
    the rpm on my saw's. It's not that I want to set them
    right on the max rpm, probable 500 to 750 below max
    just to be safe. I have done a search, this is the max rpms
    that I have found, are these correct rpm numbers with
    bar & chains, clean air filters?

    MS200T 15000 rpm
    026 14000 "
    MS361 14000 "
    MS460 13500 "
    MS660 13000 "

    Thanks, Gary
     
  2. Lakeside53

    Lakeside53 Stihl Wrenching

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    The 200T is 14,500, with bar and chain.
     
  3. Trigger-Time

    Trigger-Time Guest

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    Lake, so are the rest of the numbers correct ?

    Thanks, Gary
     
  4. Lakeside53

    Lakeside53 Stihl Wrenching

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    I didn't look them up, but they look close.. I thought the 660 was 13,500 though...

    BTW, Stihl OPERATING numbers are +/- 1000 rpm, so using the published numbers allows for variation in weather etc.
     
  5. Trigger-Time

    Trigger-Time Guest

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    Lake, Thanks for the info.

    I read in one of your post that it was hard to set the
    361 by ear, you were right! Checked mine with the tach
    I had it set at about 11750 rpm. It seems that out of
    my saw's with the limit screw caps the 361 can be set
    richer than any of them. Is this the norm for the 361?

    And I just want to say thank you again, and too a few
    others like you for taking time, for us rookies!:bowdown:

    My hat is off to you, Gary
     
  6. Lakeside53

    Lakeside53 Stihl Wrenching

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    Since January 1st Stihl has been setting the saws up with 89 octance E10. If you are using non-alcohol fuel, your saws would run richer at the stop.
     
  7. Trigger-Time

    Trigger-Time Guest

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    I have been using the E10 in all of my saw's, until today
    bought some 91 octane. checked two of the saws rpm
    with the E10 89 octane, poured it out, then checked the
    rpm after a bit, about 150 rpm drop with the 91 octane
    W/O the E10.

    Gary
     
  8. Lakeside53

    Lakeside53 Stihl Wrenching

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    The lastest charts for the 660 are different from the service manual - they show 13k, so choose your poison.
     
  9. Lakeside53

    Lakeside53 Stihl Wrenching

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    I've seen 500-850 just with the change of fuel.. but it was Arco..
     
  10. Kneejerk Bombas

    Kneejerk Bombas Tree Freak

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    If you set up a log, do some timed cuts, adjust the high speed, time some more cuts, and repeat, you'll find maximum wide open throttle RPM is not optimal. Rather, a bit under that. The exact optimal RPM is dependant on the particular saw and your cutting style.
     
  11. Trigger-Time

    Trigger-Time Guest

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    Lake, the reason I'm trying a non E10 fuel is last
    night when I got home, I used the tach and I would
    get what I would call lean pockets, after about 1.5 to 2
    seconds or so of WOT, you cold here it and the tach
    would show it too. the 460 was set at 13000 rpm but
    some of the time it would peg out the tach @ 15000 rpm
    I don't know if it would have backed down or not because
    I let off as soon as it would lean out. I tired it again this
    morning, same thing and with other saws also, same thing!
    Picked up the 91 octane W/O E10, and tired it I didn't
    have any lean out pockets with it. Dose this sound fishy to you
    or was I doing something wrong?
     
  12. DOLMARatOs

    DOLMARatOs ArboristSite Operative

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    If you really want to show your buddies something run Race fuel in your saw. I've got 114 octane fuel with low lead. I run Opti-2 @70:1 in our Dolmar 5100S Demo saw. Saw absolutely screams through a log even with semi-chisel chain (stays sharp a lot longer). It isn't cheating though, the only reason I run the fuel is that it has an ultra long shelf life and always starts easy. I've heard that a lot of OEMs for mowers, etc. use "Race fuel" to test-run thir engines before shipping. Not sure if this is true.

    PS I like the smell of race fuel and Opti.
     
  13. Lakeside53

    Lakeside53 Stihl Wrenching

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    Sounds fishy.. Are you sure your old fuel wasn't bad? How about your carb inlet screen and fuel filter...? Stiff meeting diaphragm? Keep an eye on it...
     
  14. Trigger-Time

    Trigger-Time Guest

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    Thanks, Mike
    But I'm just playing and getting exercise, not really worried about
    the very max cutting speed out of my saw's, but don't want to run
    them lean or way overly rich on fuel ether. If I need more power I will bump
    up a saw size, if my 066 or 660 won't do it I don't need to be cutting
    it.

    Thanks again, Gary

    P.S This was'nt meant as a smart a$$ reply.
     
  15. Trigger-Time

    Trigger-Time Guest

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    Lake, All of these saws are less than 2 months old, MS460, MS200T
    MS361 and MS660. The 066 and 026 are older. The fuel is fresh, I have
    used about 15 gallons in the last 3 months.

    Gary

    It should have read (these saws are less than 3 months old)
    Time is going by way to fast! And I CAN'T REMEMBER S%$!

    Gary
     
    Last edited: Nov 12, 2006
  16. Lakeside53

    Lakeside53 Stihl Wrenching

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    It's still fishy. If you have a carb that still pops from 13 to 15k, then I'd be taking back to the dealer while it's still under warranty. It should not do that... However, if you can't make it happen again with your new gas, the E10 you were using sounds like your problem... I'd be using that as fire starter.
     
  17. Monkeyhanger

    Monkeyhanger AboristSite Guru

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    Hi,

    my original German handbook states max. 14000rpm for the 460 (made in 2001)! So setting it to 13500 would be ok I guess.

    Bye
     
  18. Trigger-Time

    Trigger-Time Guest

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    Lake, I think it was the gas also, more than one saw would jump
    in rpm, now with the new gas they all hold a very steady rpm.
    Pulled the muffler cover off the 460, from that side it looks very
    good. :clap:

    Maybe the last batch of E10 I got had to much corn squeeze'ens in it. :)

    Thanks, Gary
     
  19. Canyon Angler

    Canyon Angler ArboristSite Operative

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    Where do you get this gas? Are you talking about AVGAS like they use in airplanes?
     
  20. DOLMARatOs

    DOLMARatOs ArboristSite Operative

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    We have 2 race tracks near my house. I also have a gas station that sells Turbo Blue race fuel. I have also used AVgas and mail-order racing fuel out of the blue drum.
     

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