Mercury

Supercharged 4.6-Liter V8 has best power-to-weight ratio in industry. We tested Mercury's new 450-hp 450R outboards on 10 boats including the Cigarette Tirranna, Midnight Express 43 Open, Sea Ray SLX-R 350, and Formula 430 SSC. Read our full review here.

In 2004, Mercury shuttered its top-secret test facility. The company recently reopened Lake X and offered a glimpse at how far outboard technology has come.

1957 Mercury Mark 75 Outboard Engine Endurance Record