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new engine horse power

Discussion in 'Lawn Mowing' started by Wecutgrass, Feb 5, 2012.

  1. Wecutgrass

    Wecutgrass LawnSite Senior Member
    Posts: 660

    Can someone explain to me the new horsepower on the new engines. Why did they lower the horse power but it has the same amount of CCs? is there something I'm missing?
  2. orangemower

    orangemower LawnSite Silver Member
    from pa
    Posts: 2,773

    class action law suit for false advertizing.
  3. Richard Martin

    Richard Martin LawnSite Fanatic
    Posts: 14,700

    They got busted for using the same size engine and having different horsepower ratings. There was also controversy over maximum horsepower and working horsepower. Now they only rate them on working horsepower.
  4. djagusch

    djagusch LawnSite Platinum Member
    from MN
    Posts: 4,231

    There is some truth to the above posts. The outcome of those two reasons caused the mfg's to work with SAE to make a standized hp rating test. Since this is the industries standardized test now the consumer should be able to compare apples to apples to hp ratings.

    One thing though to check is when a mfg states a hp rating they will have small print saying according to SAE standard XXX. This is a way to make sure they are testing the same way. I'm guessing some mfg's may be slow to switch their rating system over. Kawi just did in the fall I believe, honda just started to go to a model number over 3 yrs ago, briggs switched to a torque rating 2yrs ago. I haven't noticed kohler switched yet but could have.

    Also just because there is a standardized test does not mean that is the law to use it. But after the last lawsuit they would be dumb to state a hp rating without it.
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  5. Razorblades

    Razorblades LawnSite Senior Member
    Posts: 950

    If you're talking about the new HP ratings of Kawasaki engines, you should visit their website, as it will explain some of your questions.

    Basically, Kawasaki is now testing and rating their engines to different certifications.
  6. Razorblades

    Razorblades LawnSite Senior Member
    Posts: 950

    The engine manufacturers also still have the same engine-cc's/cu.in with different hp ratings, just like they always did. Just look at the eng. manufactuers engine specs.

    They are still rated at 3600 rpm for maximum hp also.
  7. Richard Martin

    Richard Martin LawnSite Fanatic
    Posts: 14,700

    The only company that I've noticed still doing it is Kohler. They do so at their own peril. It was a civil lawsuit so no laws were passed to force them to do otherwise.
  8. Razorblades

    Razorblades LawnSite Senior Member
    Posts: 950

    We may not be talking about the same thing because you can go to kawasaki's website and see serveral series of engines that are the same size (cc) but have different hp versions of that series engine. Briggs Vanguard big block series and Kohlers new big block series also have 3-4 engines trhat are the same cc size but have different hp versions.
  9. Richard Martin

    Richard Martin LawnSite Fanatic
    Posts: 14,700

    Yeah, Kawsaki is a litte confusing. Check this out: http://www.kawasaki-criticalpower.com/

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