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Bound to happen

Discussion in 'Chainsaw' started by GeeVee, Mar 9, 2008.

  1. GeeVee

    GeeVee East Coast Champion

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    When will the first of the four strokes hit real production? Any opinions?
     
  2. cmetalbend

    cmetalbend ArboristSite Operative

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    About the same time you get a free back-brace with purchase, Didn't they have 4-strokes many years ago?
     
  3. Wortown Mick

    Wortown Mick Banned

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    Meh, 4 strokes can outrev 2 strokes now.
    Theyre getting lighter too, look at whats happened in the MX bike world, asides from EPA regs.
    However they run MUCH hotter. a 4 bangers ill suited for normal chainsaw useage.
     
  4. Edge & Engine

    Edge & Engine Addicted to ArboristSite

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    My guess is by 2010.
     
  5. huskydave

    huskydave Addicted to ArboristSite

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    Those are not reliable need constant valve adjustment and are very expensive to rebuild. E-tech or direct, semidirect injected two strokes are a better choice.
     
  6. scotclayshooter

    scotclayshooter Addicted to ArboristSite

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    You forgot to add Stihls 4mix engines!
     
  7. huskydave

    huskydave Addicted to ArboristSite

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    Yeah I hear those are real winners lol. Did they end up getting them to last more than a year before grenading?
     
  8. scotclayshooter

    scotclayshooter Addicted to ArboristSite

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    According to Mr Lakeside yes they have!
    They are pushing them like crazy in the UK soon all the smaller capacity strimmers will be 4mix they fazed out my beloved fs250 and replaced it with the fs130 4mix :cry: :cry: :cry: If they would just make one with .3hp more i would give it a try
     
  9. stihltech

    stihltech Addicted to ArboristSite

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    4 Mix

    These are holding up great here. ! down due to bad fuel. Even with abuse. I adjust valves at tune up time, no big deal. Most are within a few thou.

    If you have all those going bad, I will bet a two stroke will be junk in the same hands.
     
  10. RiverRat2

    RiverRat2 Serio Tree Freak

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    Yep we have commercial customers (Lawn care folks) using them several years now and and occasional valve adjust @ tune up is about it,,,

    If they run Ultra syn mix it is even better!!!!
     
  11. Just Mow

    Just Mow Don't touch my Willie !!!

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    Holding up here as well. Go figure a Husky man would spout some sh:censored: t about it.LOL
     
  12. huskydave

    huskydave Addicted to ArboristSite

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    carbon buildup after 100-200 hours destroys the valves. Camshaft failures bearing failures. Stihl won't waranty the product if you don't use their oil sounds great to me. If I thought it was good I would recomend it. I will wait for the bugs to be worked out. More moving parts = more problems. It would need to be taken apart and decarboned by hand where as with a Honda and Dolmar that have oil seperate from the cylinder one squirt of water in the carb and your done. I would buy honda.
     
    Last edited: Mar 9, 2008
  13. stihltech

    stihltech Addicted to ArboristSite

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    As far as the carbon, Stihl has a chemical decarbonizer that Lake says works well, I have yet to have to use it.
    If you mean 50 to 1 Stihl oil, I can't believe any major saw brand would cause problems at this ratio, but it will at a richer ratio..

    There has to be a reason for problem with your operators, and it comes down to maintenance and fuel. Correct either one, and your problems will relieve themselves.
     
  14. GeeVee

    GeeVee East Coast Champion

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    Agree with StihlTech.....


    Decarbon spray can work well. Proper ratio of Shindaiwa, Echo, or Poulan is suitable.

    Extra props to StihlTech for mentioning the Fourmix 's are not -like just another two stoke.
     
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  15. gink595

    gink595 Banned

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    I wouldn't be surprised that the chainsaws take the route of some of the high revving motorcycle four strokes of Moto GP. They use camless motors. the valves are actuated either by pneumatics or hydralics cylinders thats linked to sensors that read load and engine speed and more.
     
  16. safeT1st

    safeT1st ArboristSite Operative

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    This thread is making me want to go to more garage sales and buy more saws . I've developed a passion for these things ......collecting , tearing down , inspecting , assembling , annoying the neighbours . Now there's this talk of change . Boo Hiss . I love the old stuff ..older the better .
     
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  17. gink595

    gink595 Banned

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    Thats what I thought when the two strokes where being phased of the motorcycles and snowmobiles, now I think that the bikes are lighter and much more faster than ever with these 17,000+ rpm four strokes, it's getting crazy but scary I agree.
     
  18. safeT1st

    safeT1st ArboristSite Operative

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    change

    Yah , change is usually good in the long run but hard to accept initially . Ever go to bike shows and see how much attention the old classics get ? Just something about old iron ...or in the saws case (no pun intended) old aluminum/magnesium .:greenchainsaw:
     
  19. teacherman

    teacherman Addicted to ArboristSite

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    How do you use it? Do you remove the jug?
     
  20. Lakeside53

    Lakeside53 Stihl Wrenching

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    Huh? 100-200 hours, that's a couple of months in the hands of a pro.. I've seen BR600 blowers with well over 1000 hours, maybe much more... same with the trimmer/brushcutters.

    Yes, don't use junk oil at 32:1....

    Bearing failures? news to me..

    No.. you don't need to remove the cylinder or any parts to "de-carbon". BTW... EDTA does NOT remove carbon... it removes calcium deposits which are what most people refer to a "carbon". We've done ONE "de-carbon" in three years...


    Jiffy Lube will make a fortune doing oil changes in the Honda engines... :greenchainsaw:
     

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