I was in a Volvo car that had this engine in it. Volvo car calls it a D5. I was surprised when told that it wasn't a gas engine. It has tons of low-end torque and was very quiet (unlike the ball-bearing sound I'm used to from diesel). Campion boats has a performance report on their Explorer 602 with this engine in it at website:
http://www.campionboats.com/2005/exp...C.php?Report=1
This test is with a single prop. The D3 160hp is now available with duoprop. You can compare the D3 with the Gas 225 O/B, 5.0 and 4.3 sterndrive. The D3-130hp may also be an option for you. It's torque curve is comparible to a 190hp gas sterndrive.