Because of the location of the oil/water pump and no way to mount a fan it might have been for a boat (maybe). You might try asking over here; https://www.smokstak.com/forum/forumdisplay.php?f=38
As it looks to have a pulley on the back, could have been a stationary engine running a belt line in a shop or ?
I have not tried to run it as I have to fabricate water outlets first. I cannot find a similar engine in Google or the auto forums. Had it looked at by a group of early boat engine restorers and they thought it was not a marine engine. Thanks for the input! Steve
Well how early of boats were these guys working with, I would say this motor is from the teens. Smokstak has a lot of different sections. One might be a better fit then others or try one of the national antique car clubs.
31steve, which section in Smokstak? I would like to follow over there and see what they come up with.
I found it. There a bit more info if you got it from a guy named Tim https://www.smokstak.com/forum/showthread.php?t=174212&highlight=Rayfield
There was a link to above in your posting over there.