Seven Marine assembles its outboards in an industrial park building that also houses its office space. It’s an assembly shop — unlike Mercury Marine or Yamaha, Seven doesn’t manufacture any of the components it designs for its outboards. It does not have the scale to open a foundry, or set up gear-cutting machine cells or even a paint booth. That’s all outsourced, and southeastern Wisconsin is sprinkled with world-class suppliers for those services who also support a cluster of heavy hitters located in the region, including Mercury Marine, BRP Evinrude, Harley-Davidson, and Briggs and Stratton. Seven says it sources parts and services from 30 Wisconsin-based suppliers.