Mercury Marine is a marine engine division of Brunswick Corporation headquartered in Fond du Lac, Wisconsin . The main product line is outboard engines . It also produces the MerCruiser line of sterndrives and inboard engines . As well as an all new lineup of electric outboard motors utilizing 48V lithium-ion modular and portable designed batteries. Implementing an industry-first transverse flux motor technology, yielding high torque with optimum efficiency. Some manufacturing is in Fond du Lac, while 40-60 HP engines are made in China. Smaller engines are Tohatsus that have been rebadged .