Thought this might be something from your old marine days and you could give some advice to him on a farymann engine in a sailboat. Here is a link to another diesel site. I myself had never heard of this brand of engine. http://www.midwestdieselconnection.com/forum/showthread.php?t=6564

I've only seen one... Most are older than my era. I delt a lot with Universal Atomic 4 gas engines... flat head with updraft carbs... as auxillary power for sail vessels. There were others with Hercules or Continental blocks, Grey Marine made many of these. Most of these names are gone now or bought up.There were some interesting profiles with engines mounted flywheel forward with the drive off a single shaft key on the damper end. Made a much lower profile to fit under a flush deck.