Counter Rotating Outboard Engines

[willdubiel]

With regard to trim and performance, does it matter which drive is counter-rotating? I know this doesn't apply with dual, counter-rotating prop drives like volvos, zeus, etc.. I'm thinking more about dual outboard, single prop applications, where its most common to put the counter-rotating drive (left hand rotation) on port, and the right hand rotating drive on starboard. I'm wondering if anyone has experience switching this standard setup around, especially on hight speed craft.

[tunnels]

Went through this excise on one boat and there was no noticeable differance at all so went back to standard ! couldnt tell the differance .