Piston upstroke. Piston downstroke. Two simple strokes that deliver a powerful advantage. Mercury’s OptiMax line, the best-selling direct-injection two-stroke outboards on the market, is the culmination of years of technological innovation. From the outset our goal was to provide boaters with superior acceleration and top-end speed. All while delivering the clean, quiet, durable, and fuel-efficient qualities of a four-stroke. The results speak for themselves (very quietly).
