• Mar 12, 2011
Seven Marine 557 – Click above to watch the video after the jump

In case anyone was accusing supercharged, the 556-horsepower LSA V8 that powers the Cadillac CTS-V of lacking versatility, refer to this video and stand corrected. Custom boatbuilder Seven Marine has taken the enormously powerful engines and adapted them to a marine outboard application.

According to Seven Marine, its 557 is the most powerful outboard ever made. The grunt is channeled to the water through an electronically-controlled ZF transmission. The Seven Marine 557 is also the first outboard ever to be joystick-controlled.

According to Seven, it can be hung as a single-engine setup on a 25 to 27-foot boat, or in a double, triple or quad setup on boats ranging up to 55 feet. Seven Marine claims the engine should be good for a 10-20 percent efficiency and performance increase over standard onboard engines because it requires fewer gear sets to operate, which means less drag. You can check the CTS-V-powered marine setup in the video after the jump.

[Source: YouTube]



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    • 1 Second Ago
  • 13 Comments
      • 3 Years Ago
      Except for maybe a very small niche, most people are just gonna go with proven marine motors. Being stranded in the middle of nowhere isn't really fun and if you trek around the world it's pretty obvious that the most popular outboards are always Yamahas. It seems like this would be very complex to install as well and probably insanely expensive not just for the motor but for everything else to make it work.
      • 3 Years Ago
      Boating; the only place where you will hear 'we used a V8 to improve fuel efficiency'
      • 3 Years Ago
      The LS based motor has got to be the best design of any ICE ever made. All car companies, GM inclused, have spent billions developing 24, 32, 40, 48 valve motors, and the trusty LSx line soldiers on.

      Think of it, BMW, Mercedes, Audi, Lexus, will all replace every engine that is currently in their inventory, and the LSx will still be here.

      When GM needs a "new" engine, they just simply add technology. Can't wait to see what direct injection does for the LS line in the future.
        • 3 Years Ago
        Pretty much. Chevy small blocks are one of the very few engines to be used in automobiles, boats, and even planes.

        Motus even used the same architecture to make a 4 cylinder engine that makes 160 hp while only weighing 130 lbs.
      • 3 Years Ago
      Wish they'd make the outer casing nicer looking
      Something like this http://tinyurl.com/64azg4z
      • 3 Years Ago
      I'm curious why did they prefer to rip a luxury sports car rather than install a crate engine with an off-the-shelf supercharger? That what I'd do, but I'm far from being a marine engineer :-)
        • 3 Years Ago
        Well if you watched the video, the son explains that they are looking to be compete as both a top level outboard motor producer as well as a price competitive pod type/inboard motor setup. Obviously both classes of motor, and their respective boats, are pricey. I think they are using crate CTS-V engines because the luxury name appeals to the affluent buyers, but even more so, there is a positive association with having that reliability of an OEM product.

        I'm just interested in how the engines don't build up too much heat in those fairly small cases!
      • 3 Years Ago
      Awesomesauce.
      Carlos
      • 3 Years Ago
      Great durability test!
      • 3 Years Ago
      But the question is, will it fit on the back of a Toyota Hilux?
      • 3 Years Ago
      What an exciting video. Just what I need to wake me up on a gloomy Saturday morning at work. Thanks AB.
      • 3 Years Ago
      Cite your source Aaron Richardson! YOU didn't find this link on youtube! You were tipped off and that person (aka. constant reader/viewer) should be recognized. Jeesh!
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