Seven Marine 557 Outboard: In-Water Debut

It’s alive! Seven Marine has breathed life into its 557 outboard. The monster motor — powered by 6.2 liters of supercharged Cadillac V8 — was in the water at the 2012 Miami International Boat Show, and I got a ride. Ask me to describe the experience in a few words and I’d choose smooth and sophisticated. The V8 hums under the cowl, the ZF transmission shifts silently, and the powerband feel seamless. This is not the kind of motor that’s going to snarl and give you a kick in the pants when you drop the throttle. It’s more like a locomotive, churning away with unlimited, unabated thrust.

Seven Marine's 557 powers a Sea Hunter 29 at the Miami International Boat Show.

We laid out the premise of the Seven Marine 557 when it debuted in a static display at the 2011 Miami show . Since then Seven Marine has put together several examples of the motor to use for development and endurance testing, which was conducted last summer and fall. Successful on-water testing generated support from investors that will finance the creation of production tooling and an assembly operation in suburban Milwaukee, Wis., with a goal of delivering the first motors to customers in June or July of this year. The motors will be built in batches of 25.

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