Hiya,
** What about one of these (used of course since they're out of production)
http://www.yanmar.com.au/marine/d_series/dseries.htm** or one of these?
<a href="http://www.alibaba.com/catalog/100958827/10_HP_Diesel_Outboard_Motor_And_Diesel_Straight_Dr ive_Outboard.html#productDetailpageLocation">
http://www.alibaba.com/catalog/10095...utboard_Motor_
And_Diesel_Straight_Drive_Outboard.html#productDet ailpageLocation</a>