kulas44
Guru
Just how much difference would it make on a twin engine fd trawler if both props rotated the same direction. I'm planning to install new (rebuilt) smaller engines in my boat that are both standard rotation. I would like to rebuild my current VD gears and reuse them, they are 72s I think, 2.91 ratio. But, they cannot be used for counter rotation. I could change to a newer type like the Hurth 630 in a 2.87 ratio (read $$$) or Twin Disks (more $$$). I dont need a down angle gear or a drop center, the Velvet drives are perfect for my setup. I have friends (charter captains) that run twin outboards with the same rotation, so they only need one spare lower unit and prop. They dont notice any difference. Any thoughts, preferably actuall experience ?