Ive concluded that most rebuilds and many repairs are a waste of money, costing the cruiser huge amounts of time and frustration. Having a professional rebuild your diesel engine, for example, will cost at least half the price of a replacement. For this, you often get no warranty or, at best, one for 90 days. Contrast this with buying a new engine with, typically, a full-parts-and-labor warranty of 2,000 hours or two years. If you go the rebuild route, the mechanic is unlikely to be there for you when the engine dies halfway around the world. But buy a power plant from a reputable manufacturer, and, under the warranty, you can avail yourself of a worldwide dealer network.