Mark, I am really sorry to beat this horse but since you are the resident expert on the Q design, do you know what the reason for the initial design? It seems as if they were trying to develop an engine capable of turning a right hand prop, so instead of designing a reverse rotation small block, they turned a standard engine around, developed the front and rear castings, etc and voila, now you can turn the prop to the right. But why the need to turn the prop right CW in a single engine boat? I think question has been asked a couple of times. But then the question is in a twin engine boat, to achieve a left and right hand rotation prop setup, they still were faced with designing a reverse rotation engine for the other side, so now it seems they doubled the engineering effort, and EXPENSE. What am I missing? Those extra castings and parts cost a bunch of money for a relatively low production marine engine.