The Big Block Gets Bigger, Goes Digital.
Mercury Racing’s core big block sterndrive is bigger, smarter, and more powerful than ever. We’ve stroked out the new 565 to 8.7 liters (533 cubic inches), increasing the output to a whopping 565 horsepower (at the 5,000-5,400 rpm operating range), and added dual throttle bodies and electronic fuel injection for precise air and fuel control. A new propulsion control module for this class — the same PCM used on our ultra-high-performance quad-cam, four-valve 1350 — keeps the system running at peak efficiency. We’ve also introduced a transmission control module for true Zero Effort® operation. All of this power on 89 octane pump gas.