I have just bought an Atlantic 42 with twin Volvo Penta TAMD63P diesels (2 x 370HP). The engines are mounted close together apparently to facilitate running on a single engine whilst in harbour or on rivers, canals. The rudder offset only being 5 degrees to keep in a straight line. This all sounded good in terms of more economic running whilst limited to 8Kts (local speed limit) but what is this doing to the idle engine gearbox? Hopefully, the gearbox is designed to be spun by the idle prop but could it be doing some damage? Anyone else been in this situation?
