Thread got me doing a little more research, especially as we contemplate getting back in the game, one of these style boats may make sense for us. I've always liked the build of the American Tugs a little better but admittedly haven't spent much time on a Nordic.
American Tug uses Cummins and some models have the option of using one of thie commercial units.
Nordic appears to be a Volvo house now.
"There's the Right Way, the Wrong Way, and what some guy says he's gotten away with"