When choosing engines for his new Insetta 45 from American Marine Design, an owner recently turned to Mastry Engine Center for the ultimate package. He wanted at least 350 hp diesel sterndrives, but they needed to fit into the confined space of the catamaran hulls, offer an exceptional fuel burn ratio and be lightweight.

Working with American Marine Design’s builders, Mastry engineers came up with a diesel power solution. They paired twin EPA Tier-3 compliant Yanmar 8LV-370Z engines with Yanmar ZT370 hydraulic clutch counter-rotating prop sterndrives.

The twin-turbo Yanmar V8s are common rail fuel injected, offer high torque and produce an impressive 370 mhp each at 3,800 rpm. Yet they’re exceptionally smooth and quiet. At a mere 992 lbs., the 8LV-370Z diesels have the best power-to-weight ratio in their class. www.mastry.com