Myth: Four-stroke outboards are more fuel-efficient than two-strokes.
You’ve got to burn fuel to make horsepower. Comparisons are often made between older, carbureted two-strokes and newer fuel-injected four-strokes. In those cases, the enhanced economy comes from the fuel delivery system, not from the number of revolutions in a power cycle. Compare modern two-strokes like Evinrude’s E-Tec outboards to modern four-strokes, and the difference is too close to call. Check our boat test database and see for yourself.
Watch the video linked below for a detailed explanation from Karl Sandstrom, product manager for BRP’s Evinrude Outboard Division, comparing two-stroke and four-stroke outboards.