The gearbox is mounted separately under the power head but above the waterline. It is thereby protected from damage if the unit runs aground. The gearbox is a robust electro-hydraulically operated system with two multi-plate-clutch packages that allow for high torque and power transfer.
It is designed to withstand crash stops and operates both clockwise and counter clockwise to allow the user to mount or even transfer the OXE Diesels on any boat and between different configurations. Propellor rotation is simply selected from the display settings.