Volvo Penta has good news for cruising powerboat owners. It just introduced a new D8 diesel engine for boats in the 45- to 55-foot range, larger IPS pod drives for that engine, and new joystick controls for traditional shaft drives, all under the company’s theme of “Easy Boating.” The new D8 diesel is designed for both IPS and inboard shaft drives, giving cruising powerboat owners a broader selection of power systems. The D8 is an eight-liter, six-cylinder, inline diesel; it’s new to the recreational boating market, although it’s been used in Volvo trucks and buses for the past three years.…