Looking for advice on diesel, which one to buy. I'd like to stay
within the following specifications: [A small engine for a small
boat.]

Single or two cylinder
12 hp or less [ 8 - 12 hp is all I need]
Hand startable [this is mandatory]
As short, measured from front of the engine to the prop flange, as
possible.

I can buy either new or old. Does anyone out there have any
suggestions?
Appreciate any help,

Trent Sanders
S/V Cimba