Seven Marine has developed the most powerful outboard motor in the world, a four-stroke that delivers a whopping 557-hp. The new engine is based on 6.2-liter V8, with an all-aluminum, supercharged GM powerhead that is basically the same engine used in a Cadillac CTS-V. It has closed cooling and a computer-controlled disc-clutch transmission with hydraulic shifting sourced from ZF Marine. The design is somewhat radical as well; the V8 powerhead mounted is horizontally, rather than in the usual vertical orientation.
Reportedly the 557 will run on 89-92 octane pump gas, and other than the stainless steel exhaust and special computer programming, it's basically stock. The company is currently making some alterations to the design which will make the engine's final drive ratio more flexible. Sea trials are underway, and hopefully we will see this monster out on the water soon. If the design is successful, it may turn out that this egg-beater will be a world-beater...
Suzuki Motor Corporation is pleased to announce the introduction of the all–new DF300B, which is the latest outboard model to join Suzuki’s existing ‘GEKI’ series of dual-propeller outboards