As part of an agreement announced last year, many Vikings, including the 65 we tested, will come standard with MAN diesels. The engines offered on the 65 are the 1,000-hp 2842LX V-12s, one of four 28-series engines. Available in 8-, 10-, and 12-cylinder configurations, 28-series MANs are characterized by a 128mm bore and 142mm stroke, producing a per-cylinder displacement of 1.83 liters. Yet while the 2842 displaces nearly 22 liters, it weighs just 3,483 pounds, for a weight-to-horsepower ratio of only 3.48:1.
The 2842, a four-stroke design, employs two valves in each individual cylinder head. While the block is of cast iron, the oil sump and flywheel housing are cast in aluminum to save weight. Cylinder liners are wet and replaceable, and the crankshaft features bolted-on counterweights. Like other MANs, this model features the company's unique cylinder cutout feature that is integral with the Bosch injection system. At idle, fuel is cut off to selected cylinders, which reduces fuel consumption and smoke, and keeps cylinder temperatures high enough to effect complete combustion. Also contributing to maximum efficiency are two water-jacketed turbochargers and a seawater intercooler.
This review/article originally appeared in Power & Motoryacht Magazine, January 1993 and is written by Liz Segre. For more great powerboat reviews, visit their website and subscribe at: https://www.powerandmotoryacht.com/uncategorized/subscribe-power-motoryacht