They also build theese Diesels in the USA
look here
http://www.marinedieselusa.com/
Mercruiser, Volvo Penta, Crusader Gas Marine Engine Direct Fit Replacement*
MarineDiesel’s RE-POWERING Advantage
MarineDiesel manufactures the marine industry’s only V8 diesel engine specifically designed to be a direct replacement for existing Mercruiser, Volvo Penta, etc gas engines. Why even consider the major expenses associated with extensive hull modifications when you could simply “Drop-In” a supercharged MarineDiesel. MarineDiesel has taken the of developing and matching the existing locations of the Volvo Penta and Mercruiser parts. This includes mounting, exhaust, fuel, electrical, etc.
MarineDiesel’s PERFORMANCE Advantage
MarineDiesel utilizes a custom intercooled Lysholm Supercharging system. This Low Rpm - High Torque Rise system in conjunction with a full 6.5 liters of displacement allows MarineDiesel to achieve the low end performance most “turbo lag’d” inline small displacement diesels engines cannot provide. Along with this the superior performance of the MarineDiesel allows the same low speed performance as similar gas Volvo Penta and Mercruiser engines. Select this link to read more about how to compare our diesel marine engines to an existing gas Mercruiser engine.
MarineDiesel’s DURABILITY Advantage
The MarineDiesel product line is based on AM General’s military Optimizer 6500 engine. Although many customers confuse this engine with earlier General Motors 6.2L or 6.5L engines, the Optimizer 6500 engine should not be confused (read more). This is the same engine used to power the rugged Humvee (High Mobility Multipurpose Wheeled Vehicle) as well as various other pleasure and commercial applications. Due to extremely stringent military specifications, the Optimizer 6500 engine allows MarineDiesel to provide our customers with this same expected high level of product durability and customer satisfaction.
MarineDiesel’s VALUE Advantage
Minimal required installation labor as compared to competitive offerings such as Yanmar and Cummins. Therefore lower installed overall price, superior performance thru larger engine displacement and supercharging, better fuel economy thru more useable low rpm power, ease of service and parts availability thru less complex design......when the water settles and all the facts are evaluated MarineDiesel undoubtedly offers the best overall value.
If you currently have a boat with gas engines and interested in re-powering with diesel, but unsure as how to select the proper MarineDiesel engine model, select the following link to read more... Engine Selection