Patented Technology. Unprecedented Drive.
Pushing the performance envelope to new levels. Setting numerous industry firsts. These are advances that only account for a fraction of the performance makeup of Seven Marine's outboards. Unmatched horsepower, unique geometries and groundbreaking technology provide entirely new options and capabilities to go faster, more efficiently. Technology, performance and art - in perfect harmony.
Better Power To Weight
Seven 557GT – .507HP/lb.
Yamaha 350 – .435HP/lb.
Improved Top Speeds
|Twin Seven 557's||Intrepid 375||72.5|
|Twin Seven 557's||Yellowfin 36||75.7|
|Twin Seven 557's||Fountain 38||80.6|
|Triple Seven 557's||Invincible 42||81.6|
Fuel Economy Advantage
A pair of pre-production 557's powered an Intrepid 370 Cuddy into the mid-70's; over 10% faster than it's ever gone. Equally impressive is the fact that a pair of Seven Marine 557's can cruise where existing triples are wide-open, with the 557's yielding improved fuel economy of approximately 20%.
Fuel Economy Comparison At 65MPH
Twin Seven 557's: 72.2GPH
Triple Yamaha 350's: 92.9GPH
Triple Mercury Verado 300's: 98.5GPH
|Twin Seven Marine 557's||Triple Mercury Verado 300's|
|Increased Top Speed||Accomplish More WIth Less Effort
Fewer RPM to achieve desired speed
|Twin Seven Marine 557's||Triple Mercury Verado 300's||% Change|
|Increased Top Speed||Go Faster More Efficiently
Comparable fuel economy at low-speed cruise, +20% fuel economy at high-speed cruise