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Stihl 066 vs 660

Discussion in 'Chainsaw' started by wsg, Jul 29, 2012.

  1. wsg

    wsg ArboristSite Operative

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    When did Stihl change the 066 to the 660? Saw a saw at pawn shop and wondered how old it might be.
     
  2. pwoller

    pwoller AboristSite Guru

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    Doesnt really matter. I'm not a Stihl guy but know an 066 will spank a 660.
     
  3. Alex D

    Alex D ArboristSite Operative

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    Not necessarily. Ive heard that the real early 066 red eye non decomps were extremely impressive saws and better than the 660. However some of the decomp 066s from around the mid 90s arent that good. The reason being they are prone to having the crankshaft sheared off due to the heavier aluminium flywheel. Which is why Stihl changed to poly I believe. Very costly repair if this happens. Now a 660 is lacking power due to the epa. But this is a rather easy fix. Poke a couple of holes in the muffler with a drill or dremel and swap the carb to a 066 you can get them off ebay for cheap $30-40 or so and youve got a damn good saw.

    Older is not always better.
     
  4. mdavlee

    mdavlee Tree Freak

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    Most of the changes were in the early 2000s for the 066 series to the 660. The cylinders on the older saws were better for power. The newer poly flywheel cases and cranks are better.
     
  5. w8ye

    w8ye Addicted to ArboristSite

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    The only difference between the last of the 066's made and the 660 is the number on the side of the chainsaw.

    For several years in the 90's, the 066 went through a lot of changes.

    I have a frankinsaw 066 that has the first cylinder with no decompression and the last 066 crankcase with the poly flywheel and a opened up Magnum muffler.

    [​IMG]
     
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  6. rogue60

    rogue60 ArboristSite Operative

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    I my self cant say there is that much in it from the older 066 to 660, some of the old 066 seem to rev a little harder but the 660 seems to make that up with a little more torque...There is more of a change in the tune of the saws with the change in weather form day to day than there is difference between 066 and 660, i think they cut about the same speed they just do it in a different way from each other , they get the job done about the same...but thats just me and am only going on feel of saw's in hand cutting...
     
  7. fearofpavement

    fearofpavement Trying them all

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    Anyone have the dual port muffler cover part number handy? My Stihl dealer couldn't come up with it. Thanks. (late model 066, MS660) with the poly flywheel.
     
  8. blsnelling

    blsnelling Site Sponsor

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    There are LOTS of minor, and not so minor, changes made throughout the lifetime of the 066/660. Many of these were made before it changed to the 660. Your best bet is to find the many threads that discuss this in older posts.
     
  9. w8ye

    w8ye Addicted to ArboristSite

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    The 660 Magnum dual port muffler

    1122 140 0800 is the front cover

    1122 140 0603 is the main body

    Then there are the two screens and the screw for the cover screen
     
  10. fearofpavement

    fearofpavement Trying them all

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    Thanks, are both parts required? ie the main body in addition to the front cover? (I have the oem muffler)
     
  11. wsg

    wsg ArboristSite Operative

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    Is there not a specific yr for the designation change? That's all I was asking.
     
  12. blsnelling

    blsnelling Site Sponsor

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    Lol, guess we read a lot more into it than that:) Unfortunately, I don't know the date.
     
  13. sawfun9

    sawfun9 Addicted to ArboristSite

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    I was told by the logger I got my 066 from that 2002 was when they went with the ms660 designation.
     
  14. w8ye

    w8ye Addicted to ArboristSite

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    2002 is about right
     
  15. wsg

    wsg ArboristSite Operative

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    The 066 he has looks nearly new so I know it's at LEAST 10 yrs old then. THANKS! I don't mind reading/learning more either way!
     
  16. fearofpavement

    fearofpavement Trying them all

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    Well, if the saw looks great, that is some value right there. ie, even if the engine was blown it would be worth a couple hundred. If the compression is good and the saw runs well I would go for it if you are looking for a saw in this class. Some versions of the model may have been better than others but as far as I know they are all good. Pawn shops don't usually invest a lot into chain saws (or any other item) so make an offer. I have mentioned it on here before but I have actually purchased items from pawn shops for half of their asking price. Once I made an offer on a large torque wrench, they said no so I left. A month later I came back and mentioned my previous offer and said I was still willing to pay that amount. I brought it home.

    So go buy it and then report back...
     
  17. zorak

    zorak ArboristSite Member

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    Get the serial number off of it and call or email Stihl with it and have them give you the year and date it was made.
     
  18. WACutter

    WACutter ArboristSite Operative

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    I have a late model 066 from around 2001/2002. It looks identical to a current model 660, muffler and all. It does have a Mahle cylinder, unlike the current model. It seems to run a bit better than a well broken in very recent 660. I have heard that the cylinder porting has been made less then optimal for performance over the years.

    From memory, I think the 1122 140 0603 is the entire muffler assembly front and back, from the 066.
     
    Last edited: Jul 30, 2012

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