A torsional damper is provided for an outboard motor and disposed between a flywheel and the engine of the outboard motor. The apparatus further includes a vacuum loader provided with an additional conveyor structure and a vacuum processing chamber for sequentially loading substrate to be processed. The door also includes a backup power supply mounted in the door and supplying electrical power to the door latch and switch, with the backup power supply receiving power from a vehicle electrical system to recharge the backup power supply.