Well we got it figured out with help from Westerbeke/Universal. They confirmed via pictures I set them. It's a M3-20
Found the manuals and parts list off Westerbeke/Universal website.
Now off to find parts as the unit has been neglected for a number of years. Looking at Westerbeke/Universal website and there looks to be a number of parts that are unavailable,. Does anyone have sources for parts? Heard that this block is a Kubota tractor. But need more info to cross reference to Kubota motor designation.
Is there a FAQ for basic Universal motor maintenance on this site?