Lou, This is a sport engine designed for training kids. It was originally named the Fora Junior but I guess they decided that sounded a bit to juvenile. It is also available for $80-100.
It is very well mannered and an easy handler. Mine in stock configuration spins an apc 7x6 at 15,100, but take a #1 sized drill to the venturi and it spins the same prop to 16,900 @ just under .5hp. And the threaded push/pull contra adjustment is silky smooth. This betters my PAW GTS 2.5 by 400 rpm.
We need more purpose built diesels like this.