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

Improved Top Speeds

RIG Boat Top Speed
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

MPH RPM
Triple Yamaha
350's
Twin Seven Marine 557's Triple Mercury Verado 300's
40 3500 3300 3750
45 3900 3600 4150
50 4250 4000 4500
65 5550 4900 WOT
70 WOT 5350
75 WOT
Increased Top Speed Accomplish More WIth Less Effort
Fewer RPM to achieve desired speed
MPH MPG
Triple Yamaha
350's
Twin Seven Marine 557's Triple Mercury Verado 300's % Change
40 1.25 1.2 1.25 -4.2%
45 1.15 1.2 1.2 0.0%
50 1.05 1.05 1.0 4.8%
65 0.7 0.9 .66 17.6%
70 0.65 0.8 17.7%
75 0.7
Increased Top Speed Go Faster More Efficiently
Comparable fuel economy at low-speed cruise, +20% fuel economy at high-speed cruise