Originally Posted by richardjawilson
other than height adjustment which I can understand, what is the advantage of having a 10'' set back?? I dont have any experience of racing boat setup and would be interested to know the benefit these make to handling and speed etc
Whilst the water may be less disturbed further back and give you more room in the boat, many boats benefit from having the engine further back by giving better pitch stability without lengthening the hull, and in a race setup you can have the engine run higher which gives less drag.
I would suggest that for most people the extra speed gain would be very small below 50 mph, and the gains in pitch stability would not be worth the extra cost.
Some boats do not gain much significant benefit at all - Ian Sterlings Phantom 21 with an XR2 - 200hp on it has it bolted to the transom and reguarly beats the Batboats in the rough!