Thanks to the efforts of several engine manufacturers, your engine choices are greater than ever. The stern drive market, for instance, was once the exclusive domain of gas-powered engines. No more. For those who want the dependability, longevity, and safety of a diesel combined with the easy handling and performance of a stern drive, the new 300-bhp diesel from Cummins MerCruiser meets both requirements. The 4.2 ES 300, a turbocharged in-line-6 engine with 254 cid, provides the snappy performance you'd expect from a stern drive application.